FAQ
JVM crash under writes: ExceptionMark destructor expects no pending exceptions
--------------------------------------------------------------------------------

Key: HDFS-1587
URL: https://issues.apache.org/jira/browse/HDFS-1587
Project: Hadoop HDFS
Issue Type: Bug
Components: data-node
Affects Versions: 0.20.2
Environment: uname:Linux 2.6.32-25-generic #44-Ubuntu SMP Fri Sep 17 20:05:27 UTC 2010 x86_64
libc:glibc 2.11.1 NPTL 2.11.1
rlimit: STACK 8192k, CORE 0k, NPROC infinity, NOFILE 64000, AS infinity
load average:0.32 0.25 0.20

CPU:total 2 (2 cores per cpu, 1 threads per core) family 6 model 15 stepping 6, cmov, cx8, fxsr, mmx, sse, sse2, sse3, ssse3

Memory: 4k page, physical 4057424k(108876k free), swap 24009100k(24009100k free)

vm_info: Java HotSpot(TM) 64-Bit Server VM (16.3-b01) for linux-amd64 JRE (1.6.0_20-b02), built on Apr 12 2010 13:57:11 by "java_re" with gcc 3.2.2 (SuSE Linux)

time: Wed Jan 19 13:01:35 2011
elapsed time: 1983565 seconds
Reporter: Stuart Smith
Priority: Minor


Datanode went down due to JVM fault.
A decent number of reads/writes going on at the time.
To be honest, I'm not too worried about this, because it hasn't happened too frequently.
But I thought I'd just record it.

hs_error_pid*log was:

#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (exceptions.cpp:364), pid=1662, tid=140679121118992
# Error: ExceptionMark destructor expects no pending exceptions
#
# JRE version: 6.0_20-b02
# Java VM: Java HotSpot(TM) 64-Bit Server VM (16.3-b01 mixed mode linux-amd64 )
# If you would like to submit a bug report, please visit:
# http://java.sun.com/webapps/bugreport/crash.jsp
#

--------------- T H R E A D ---------------

Current thread (0x00007ff264330000): JavaThread "IPC Server handler 0 on 50020" daemon [_thread_in_vm, id=1755, stack(0x00007ff268faa000,0x00007ff2690ab000)]

Stack: [0x00007ff268faa000,0x00007ff2690ab000], sp=0x00007ff2690a4680, free space=3e90000000000000018k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [libjvm.so+0x70f420]
V [libjvm.so+0x2e43f6]
V [libjvm.so+0x3333fd]
V [libjvm.so+0x27ea18]
V [libjvm.so+0x27e062]
V [libjvm.so+0x27e0e6]
V [libjvm.so+0x27faf6]
V [libjvm.so+0x6a0c6f]
V [libjvm.so+0x69edbb]
V [libjvm.so+0x69dc51]
V [libjvm.so+0x69dc80]
V [libjvm.so+0x44251b]

Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)
j java.lang.ClassLoader.findBootstrapClass(Ljava/lang/String;)Ljava/lang/Class;+0
j java.lang.ClassLoader.findBootstrapClassOrNull(Ljava/lang/String;)Ljava/lang/Class;+12
j java.lang.ClassLoader.loadClass(Ljava/lang/String;Z)Ljava/lang/Class;+32
j java.lang.ClassLoader.loadClass(Ljava/lang/String;Z)Ljava/lang/Class;+23
j sun.misc.Launcher$AppClassLoader.loadClass(Ljava/lang/String;Z)Ljava/lang/Class;+41
j java.lang.ClassLoader.loadClass(Ljava/lang/String;)Ljava/lang/Class;+3
j java.util.ResourceBundle$RBClassLoader.loadClass(Ljava/lang/String;)Ljava/lang/Class;+10
j java.util.ResourceBundle$Control.newBundle(Ljava/lang/String;Ljava/util/Locale;Ljava/lang/String;Ljava/lang/ClassLoader;Z)Ljava/util/ResourceBundle;+24
j java.util.ResourceBundle.loadBundle(Ljava/util/ResourceBundle$CacheKey;Ljava/util/List;Ljava/util/ResourceBundle$Control;Z)Ljava/util/ResourceBundle;+54
j java.util.ResourceBundle.findBundle(Ljava/util/ResourceBundle$CacheKey;Ljava/util/List;Ljava/util/List;ILjava/util/ResourceBundle$Control;Ljava/util/ResourceBundle;)Ljava/util/ResourceBundle;+213
j java.util.ResourceBundle.findBundle(Ljava/util/ResourceBundle$CacheKey;Ljava/util/List;Ljava/util/List;ILjava/util/ResourceBundle$Control;Ljava/util/ResourceBundle;)Ljava/util/ResourceBundle;+37
j java.util.ResourceBundle.getBundleImpl(Ljava/lang/String;Ljava/util/Locale;Ljava/lang/ClassLoader;Ljava/util/ResourceBundle$Control;)Ljava/util/ResourceBundle;+187
j java.util.ResourceBundle.getBundle(Ljava/lang/String;)Ljava/util/ResourceBundle;+10
j com.sun.security.auth.PolicyFile$1.run()Ljava/lang/Object;+2
v ~StubRoutines::call_stub
j java.security.AccessController.doPrivileged(Ljava/security/PrivilegedAction;)Ljava/lang/Object;+0
j com.sun.security.auth.PolicyFile.<clinit>()V+7
v ~StubRoutines::call_stub
j java.lang.Class.forName0(Ljava/lang/String;ZLjava/lang/ClassLoader;)Ljava/lang/Class;+0
j java.lang.Class.forName(Ljava/lang/String;ZLjava/lang/ClassLoader;)Ljava/lang/Class;+32
j javax.security.auth.Policy$3.run()Ljava/lang/Object;+8
v ~StubRoutines::call_stub
J java.security.AccessController.doPrivileged(Ljava/security/PrivilegedExceptionAction;)Ljava/lang/Object;
j javax.security.auth.Policy.getPolicyNoCheck()Ljavax/security/auth/Policy;+51
j javax.security.auth.Policy.getPolicy()Ljavax/security/auth/Policy;+21
j javax.security.auth.SubjectDomainCombiner$5.run()Ljava/lang/Object;+0
v ~StubRoutines::call_stub
j java.security.AccessController.doPrivileged(Ljava/security/PrivilegedAction;)Ljava/lang/Object;+0
j javax.security.auth.SubjectDomainCombiner.compatPolicy()Z+7
j javax.security.auth.SubjectDomainCombiner.<clinit>()V+10
v ~StubRoutines::call_stub
j javax.security.auth.Subject$2.run()Ljava/lang/Object;+28
v ~StubRoutines::call_stub
j java.security.AccessController.doPrivileged(Ljava/security/PrivilegedAction;)Ljava/lang/Object;+0
j javax.security.auth.Subject.createContext(Ljavax/security/auth/Subject;Ljava/security/AccessControlContext;)Ljava/security/AccessControlContext;+9
j javax.security.auth.Subject.doAs(Ljavax/security/auth/Subject;Ljava/security/PrivilegedExceptionAction;)Ljava/lang/Object;+39
j org.apache.hadoop.ipc.Server$Handler.run()V+168
v ~StubRoutines::call_stub

--------------- P R O C E S S ---------------

Java Threads: ( => current thread )
0x00007ff2642f1000 JavaThread "process reaper" daemon [_thread_in_native, id=7220, stack(0x00007ff263bfc000,0x00007ff263cfd000)]
0x000000004069b000 JavaThread "PacketResponder 1 for Block blk_-2874635287821588874_1601382" daemon [_thread_in_native, id=5238, stack(0x00007ff260bcc000,0x00007ff260ccd000)]
0x00007ff264534800 JavaThread "org.apache.hadoop.hdfs.server.datanode.DataXceiver@47fe9d9f" daemon [_thread_in_native, id=5237, stack(0x00007ff2630f1000,0x00007ff2631f2000)]
0x00007ff264580000 JavaThread "org.apache.hadoop.hdfs.server.datanode.DataXceiver@1af438fd" daemon [_thread_in_native, id=15176, stack(0x00007ff2632f3000,0x00007ff2633f4000)]
0x00007ff264394800 JavaThread "org.apache.hadoop.hdfs.server.datanode.DataBlockScanner@524c71d2" daemon [_thread_blocked, id=1779, stack(0x00007ff263cfd000,0x00007ff263dfe000)]
0x00000000402b3000 JavaThread "org.apache.hadoop.hdfs.server.datanode.DataXceiverServer@45490eb5" daemon [_thread_in_native, id=1772, stack(0x00007ff263dfe000,0x00007ff263eff000)]
0x00007ff26443f800 JavaThread "DataNode: [/home/stu/hadoop/tmp/dfs/data,/mnt/drive2/hadoop-storage]" daemon [_thread_blocked, id=1771, stack(0x00007ff263eff000,0x00007ff264000000)]
0x00007ff2646d7000 JavaThread "IPC Client (47) connection to ubuntu-namenode/192.168.195.82:54310 from stu" daemon [_thread_blocked, id=1770, stack(0x00007ff26809b000,0x00007ff26819c000)]
0x00007ff2646d5000 JavaThread "IPC Server handler 14 on 50020" daemon [_thread_blocked, id=1769, stack(0x00007ff26819c000,0x00007ff26829d000)]
0x00007ff2646d3000 JavaThread "IPC Server handler 13 on 50020" daemon [_thread_blocked, id=1768, stack(0x00007ff26829d000,0x00007ff26839e000)]
0x00007ff2646d1000 JavaThread "IPC Server handler 12 on 50020" daemon [_thread_blocked, id=1767, stack(0x00007ff26839e000,0x00007ff26849f000)]
0x00007ff2644c0800 JavaThread "IPC Server handler 11 on 50020" daemon [_thread_blocked, id=1766, stack(0x00007ff26849f000,0x00007ff2685a0000)]
0x00007ff2644be800 JavaThread "IPC Server handler 10 on 50020" daemon [_thread_blocked, id=1765, stack(0x00007ff2685a0000,0x00007ff2686a1000)]
0x00007ff2644bc800 JavaThread "IPC Server handler 9 on 50020" daemon [_thread_blocked, id=1764, stack(0x00007ff2686a1000,0x00007ff2687a2000)]
0x00007ff2644ba800 JavaThread "IPC Server handler 8 on 50020" daemon [_thread_blocked, id=1763, stack(0x00007ff2687a2000,0x00007ff2688a3000)]
0x00007ff2642e0800 JavaThread "IPC Server handler 7 on 50020" daemon [_thread_blocked, id=1762, stack(0x00007ff2688a3000,0x00007ff2689a4000)]
0x00007ff2642de800 JavaThread "IPC Server handler 6 on 50020" daemon [_thread_blocked, id=1761, stack(0x00007ff2689a4000,0x00007ff268aa5000)]
0x00007ff2642dc800 JavaThread "IPC Server handler 5 on 50020" daemon [_thread_blocked, id=1760, stack(0x00007ff268aa5000,0x00007ff268ba6000)]
0x00007ff2647d3800 JavaThread "IPC Server handler 4 on 50020" daemon [_thread_blocked, id=1759, stack(0x00007ff268ba6000,0x00007ff268ca7000)]
0x00007ff264396800 JavaThread "IPC Server handler 3 on 50020" daemon [_thread_blocked, id=1758, stack(0x00007ff268ca7000,0x00007ff268da8000)]
0x00007ff264395800 JavaThread "IPC Server handler 2 on 50020" daemon [_thread_blocked, id=1757, stack(0x00007ff268da8000,0x00007ff268ea9000)]
0x00007ff2643fe800 JavaThread "IPC Server handler 1 on 50020" daemon [_thread_blocked, id=1756, stack(0x00007ff268ea9000,0x00007ff268faa000)]
=>0x00007ff264330000 JavaThread "IPC Server handler 0 on 50020" daemon [_thread_in_vm, id=1755, stack(0x00007ff268faa000,0x00007ff2690ab000)]
0x00007ff2645c3800 JavaThread "IPC Server listener on 50020" daemon [_thread_in_native, id=1754, stack(0x00007ff2690ab000,0x00007ff2691ac000)]
0x00007ff264657800 JavaThread "IPC Server Responder" daemon [_thread_in_native, id=1753, stack(0x00007ff2691ac000,0x00007ff2692ad000)]
0x00007ff264578800 JavaThread "Timer-0" daemon [_thread_blocked, id=1752, stack(0x00007ff269be2000,0x00007ff269ce3000)]
0x0000000040662000 JavaThread "29876954@qtp0-1 - Acceptor0 SelectChannelConnector@0.0.0.0:50075" [_thread_in_native, id=1751, stack(0x00007ff269fee000,0x00007ff26a0ef000)]
0x0000000040208000 JavaThread "1908393212@qtp0-0" [_thread_blocked, id=1750, stack(0x00007ff269eec000,0x00007ff269fed000)]
0x00000000401e5000 JavaThread "refreshUsed-/mnt/drive2/hadoop-storage" daemon [_thread_blocked, id=1741, stack(0x00007ff269ae1000,0x00007ff269be2000)]
0x0000000040752800 JavaThread "refreshUsed-/home/stu/hadoop-storage/dfs/data" daemon [_thread_blocked, id=1729, stack(0x00007ff269ce3000,0x00007ff269de4000)]
0x00007ff264228000 JavaThread "RMI TCP Accept-0" daemon [_thread_in_native, id=1699, stack(0x00007ff26a1f6000,0x00007ff26a2f7000)]
0x00007ff264070000 JavaThread "Low Memory Detector" daemon [_thread_blocked, id=1697, stack(0x00007ff26a93c000,0x00007ff26aa3d000)]
0x00007ff26406d800 JavaThread "CompilerThread1" daemon [_thread_blocked, id=1696, stack(0x00007ff26aa3d000,0x00007ff26ab3e000)]
0x00007ff26406a800 JavaThread "CompilerThread0" daemon [_thread_blocked, id=1695, stack(0x00007ff26ab3e000,0x00007ff26ac3f000)]
0x00007ff264068800 JavaThread "Signal Dispatcher" daemon [_thread_blocked, id=1694, stack(0x00007ff26ac3f000,0x00007ff26ad40000)]
0x00007ff264048800 JavaThread "Finalizer" daemon [_thread_blocked, id=1693, stack(0x00007ff26ad7f000,0x00007ff26ae80000)]
0x00007ff264046800 JavaThread "Reference Handler" daemon [_thread_blocked, id=1692, stack(0x00007ff26ae80000,0x00007ff26af81000)]
0x00000000401ad800 JavaThread "main" [_thread_blocked, id=1688, stack(0x00007ff2f20f6000,0x00007ff2f21f7000)]

Other Threads:
0x00007ff264042000 VMThread [stack: 0x00007ff26af81000,0x00007ff26b082000] [id=1691]
0x00007ff264237000 WatcherThread [stack: 0x00007ff26a0f5000,0x00007ff26a1f6000] [id=1700]

VM state:not at safepoint (normal execution)

VM Mutex/Monitor currently owned by a thread: None

Heap
PSYoungGen total 48128K, used 42440K [0x00007ff2c47b0000, 0x00007ff2eb800000, 0x00007ff2ee250000)
eden space 47808K, 88% used [0x00007ff2c47b0000,0x00007ff2c70d2138,0x00007ff2c7660000)
from space 320K, 100% used [0x00007ff2eb7b0000,0x00007ff2eb800000,0x00007ff2eb800000)
to space 512K, 0% used [0x00007ff2eb700000,0x00007ff2eb700000,0x00007ff2eb780000)
PSOldGen total 29056K, used 16888K [0x00007ff271250000, 0x00007ff272eb0000, 0x00007ff2c47b0000)
object space 29056K, 58% used [0x00007ff271250000,0x00007ff2722ce2f8,0x00007ff272eb0000)
PSPermGen total 21504K, used 16618K [0x00007ff26be50000, 0x00007ff26d350000, 0x00007ff271250000)
object space 21504K, 77% used [0x00007ff26be50000,0x00007ff26ce8aa88,0x00007ff26d350000)

Dynamic libraries:
40000000-40009000 r-xp 00000000 08:01 3933705 /usr/lib/jvm/java-6-sun-1.6.0.20/jre/bin/java (deleted)
40108000-4010a000 rwxp 00008000 08:01 3933705 /usr/lib/jvm/java-6-sun-1.6.0.20/jre/bin/java (deleted)
401a3000-40de1000 rwxp 00000000 00:00 0 [heap]
7ff260bcc000-7ff260bcf000 ---p 00000000 00:00 0
7ff260bcf000-7ff260ccd000 rwxp 00000000 00:00 0
7ff2612d3000-7ff2612d6000 ---p 00000000 00:00 0
7ff2612d6000-7ff2613d4000 rwxp 00000000 00:00 0
7ff2613d4000-7ff2613d7000 ---p 00000000 00:00 0
7ff2613d7000-7ff2614d5000 rwxp 00000000 00:00 0
7ff2614d5000-7ff2614d8000 ---p 00000000 00:00 0
7ff2614d8000-7ff2615d6000 rwxp 00000000 00:00 0
7ff2615d6000-7ff2615d9000 ---p 00000000 00:00 0
7ff2615d9000-7ff2616d7000 rwxp 00000000 00:00 0
7ff2616d7000-7ff2616da000 ---p 00000000 00:00 0
7ff2616da000-7ff2617d8000 rwxp 00000000 00:00 0
7ff2617d8000-7ff2617db000 ---p 00000000 00:00 0
7ff2617db000-7ff2618d9000 rwxp 00000000 00:00 0
7ff2618d9000-7ff2618dc000 ---p 00000000 00:00 0
7ff2618dc000-7ff2619da000 rwxp 00000000 00:00 0
7ff2619da000-7ff2619dd000 ---p 00000000 00:00 0
7ff2619dd000-7ff261adb000 rwxp 00000000 00:00 0
7ff261adb000-7ff261ade000 ---p 00000000 00:00 0
7ff261ade000-7ff261bdc000 rwxp 00000000 00:00 0
7ff261bdc000-7ff261bdf000 ---p 00000000 00:00 0
7ff261bdf000-7ff261cdd000 rwxp 00000000 00:00 0
7ff261cdd000-7ff261ce0000 ---p 00000000 00:00 0
7ff261ce0000-7ff261dde000 rwxp 00000000 00:00 0
7ff261dde000-7ff261de1000 ---p 00000000 00:00 0
7ff261de1000-7ff261edf000 rwxp 00000000 00:00 0
7ff261edf000-7ff261ee2000 ---p 00000000 00:00 0
7ff261ee2000-7ff261fe0000 rwxp 00000000 00:00 0
7ff261fe0000-7ff261fe3000 ---p 00000000 00:00 0
7ff261fe3000-7ff2620e1000 rwxp 00000000 00:00 0
7ff2620e1000-7ff2620e4000 ---p 00000000 00:00 0
7ff2620e4000-7ff2621e2000 rwxp 00000000 00:00 0
7ff2621e2000-7ff2621e5000 ---p 00000000 00:00 0
7ff2621e5000-7ff2622e3000 rwxp 00000000 00:00 0
7ff2622e3000-7ff2622e6000 ---p 00000000 00:00 0
7ff2622e6000-7ff2623e4000 rwxp 00000000 00:00 0
7ff2623e4000-7ff2623e7000 ---p 00000000 00:00 0
7ff2623e7000-7ff2624e5000 rwxp 00000000 00:00 0
7ff2624e5000-7ff2624e8000 ---p 00000000 00:00 0
7ff2624e8000-7ff2625e6000 rwxp 00000000 00:00 0
7ff2625e6000-7ff2625e9000 ---p 00000000 00:00 0
7ff2625e9000-7ff2626e7000 rwxp 00000000 00:00 0
7ff2626e7000-7ff2626ea000 ---p 00000000 00:00 0
7ff2626ea000-7ff2627e8000 rwxp 00000000 00:00 0
7ff2627e8000-7ff2627eb000 ---p 00000000 00:00 0
7ff2627eb000-7ff2628e9000 rwxp 00000000 00:00 0
7ff2628e9000-7ff2628ec000 ---p 00000000 00:00 0
7ff2628ec000-7ff2629ea000 rwxp 00000000 00:00 0
7ff2629ea000-7ff2629ed000 ---p 00000000 00:00 0
7ff2629ed000-7ff262aeb000 rwxp 00000000 00:00 0
7ff262aeb000-7ff262aee000 ---p 00000000 00:00 0
7ff262aee000-7ff262bec000 rwxp 00000000 00:00 0
7ff262bec000-7ff262bef000 ---p 00000000 00:00 0
7ff262bef000-7ff262ced000 rwxp 00000000 00:00 0
7ff262ced000-7ff262cf0000 ---p 00000000 00:00 0
7ff262cf0000-7ff262dee000 rwxp 00000000 00:00 0
7ff262dee000-7ff262df1000 ---p 00000000 00:00 0
7ff262df1000-7ff262eef000 rwxp 00000000 00:00 0
7ff262eef000-7ff262ef2000 ---p 00000000 00:00 0
7ff262ef2000-7ff262ff0000 rwxp 00000000 00:00 0
7ff262ff0000-7ff262ff3000 ---p 00000000 00:00 0
7ff262ff3000-7ff2630f1000 rwxp 00000000 00:00 0
7ff2630f1000-7ff2630f4000 ---p 00000000 00:00 0
7ff2630f4000-7ff2631f2000 rwxp 00000000 00:00 0
7ff2631f2000-7ff2631f5000 ---p 00000000 00:00 0
7ff2631f5000-7ff2632f3000 rwxp 00000000 00:00 0
7ff2632f3000-7ff2632f6000 ---p 00000000 00:00 0
7ff2632f6000-7ff2633f4000 rwxp 00000000 00:00 0
7ff2633f4000-7ff2633f7000 ---p 00000000 00:00 0
7ff2633f7000-7ff2634f5000 rwxp 00000000 00:00 0
7ff2634f5000-7ff2634f8000 ---p 00000000 00:00 0
7ff2634f8000-7ff2635f6000 rwxp 00000000 00:00 0
7ff2635f6000-7ff2635f9000 ---p 00000000 00:00 0
7ff2635f9000-7ff2636f7000 rwxp 00000000 00:00 0
7ff2637f8000-7ff2637fb000 ---p 00000000 00:00 0
7ff2637fb000-7ff2638f9000 rwxp 00000000 00:00 0
7ff2638f9000-7ff2638fc000 ---p 00000000 00:00 0
7ff2638fc000-7ff2639fa000 rwxp 00000000 00:00 0
7ff2639fa000-7ff2639fd000 ---p 00000000 00:00 0
7ff2639fd000-7ff263afb000 rwxp 00000000 00:00 0
7ff263afb000-7ff263afe000 ---p 00000000 00:00 0
7ff263afe000-7ff263bfc000 rwxp 00000000 00:00 0
7ff263bfc000-7ff263bff000 ---p 00000000 00:00 0
7ff263bff000-7ff263cfd000 rwxp 00000000 00:00 0
7ff263cfd000-7ff263d00000 ---p 00000000 00:00 0
7ff263d00000-7ff263dfe000 rwxp 00000000 00:00 0
7ff263dfe000-7ff263e01000 ---p 00000000 00:00 0
7ff263e01000-7ff263eff000 rwxp 00000000 00:00 0
7ff263eff000-7ff263f02000 ---p 00000000 00:00 0
7ff263f02000-7ff264000000 rwxp 00000000 00:00 0
7ff264000000-7ff265890000 rwxp 00000000 00:00 0
7ff265890000-7ff268000000 ---p 00000000 00:00 0
7ff26809b000-7ff26809e000 ---p 00000000 00:00 0
7ff26809e000-7ff26819c000 rwxp 00000000 00:00 0
7ff26819c000-7ff26819f000 ---p 00000000 00:00 0
7ff26819f000-7ff26829d000 rwxp 00000000 00:00 0
7ff26829d000-7ff2682a0000 ---p 00000000 00:00 0
7ff2682a0000-7ff26839e000 rwxp 00000000 00:00 0
7ff26839e000-7ff2683a1000 ---p 00000000 00:00 0
7ff2683a1000-7ff26849f000 rwxp 00000000 00:00 0
7ff26849f000-7ff2684a2000 ---p 00000000 00:00 0
7ff2684a2000-7ff2685a0000 rwxp 00000000 00:00 0
7ff2685a0000-7ff2685a3000 ---p 00000000 00:00 0
7ff2685a3000-7ff2686a1000 rwxp 00000000 00:00 0
7ff2686a1000-7ff2686a4000 ---p 00000000 00:00 0
7ff2686a4000-7ff2687a2000 rwxp 00000000 00:00 0
7ff2687a2000-7ff2687a5000 ---p 00000000 00:00 0
7ff2687a5000-7ff2688a3000 rwxp 00000000 00:00 0
7ff2688a3000-7ff2688a6000 ---p 00000000 00:00 0
7ff2688a6000-7ff2689a4000 rwxp 00000000 00:00 0
7ff2689a4000-7ff2689a7000 ---p 00000000 00:00 0
7ff2689a7000-7ff268aa5000 rwxp 00000000 00:00 0
7ff268aa5000-7ff268aa8000 ---p 00000000 00:00 0
7ff268aa8000-7ff268ba6000 rwxp 00000000 00:00 0
7ff268ba6000-7ff268ba9000 ---p 00000000 00:00 0
7ff268ba9000-7ff268ca7000 rwxp 00000000 00:00 0
7ff268ca7000-7ff268caa000 ---p 00000000 00:00 0
7ff268caa000-7ff268da8000 rwxp 00000000 00:00 0
7ff268da8000-7ff268dab000 ---p 00000000 00:00 0
7ff268dab000-7ff268ea9000 rwxp 00000000 00:00 0
7ff268ea9000-7ff268eac000 ---p 00000000 00:00 0
7ff268eac000-7ff268faa000 rwxp 00000000 00:00 0
7ff268faa000-7ff268fad000 ---p 00000000 00:00 0
7ff268fad000-7ff2690ab000 rwxp 00000000 00:00 0
7ff2690ab000-7ff2690ae000 ---p 00000000 00:00 0
7ff2690ae000-7ff2691ac000 rwxp 00000000 00:00 0
7ff2691ac000-7ff2691af000 ---p 00000000 00:00 0
7ff2691af000-7ff2692ad000 rwxp 00000000 00:00 0
7ff2692ad000-7ff2692af000 r-xp 00000000 08:01 3207 /lib/libnss_mdns4.so.2
7ff2692af000-7ff2694ae000 ---p 00002000 08:01 3207 /lib/libnss_mdns4.so.2
7ff2694ae000-7ff2694af000 r-xp 00001000 08:01 3207 /lib/libnss_mdns4.so.2
7ff2694af000-7ff2694b0000 rwxp 00002000 08:01 3207 /lib/libnss_mdns4.so.2
7ff2694b0000-7ff2694c6000 r-xp 00000000 08:01 6443 /lib/libresolv-2.11.1.so (deleted)
7ff2694c6000-7ff2696c5000 ---p 00016000 08:01 6443 /lib/libresolv-2.11.1.so (deleted)
7ff2696c5000-7ff2696c6000 r-xp 00015000 08:01 6443 /lib/libresolv-2.11.1.so (deleted)
7ff2696c6000-7ff2696c7000 rwxp 00016000 08:01 6443 /lib/libresolv-2.11.1.so (deleted)
7ff2696c7000-7ff2696c9000 rwxp 00000000 00:00 0
7ff2696c9000-7ff2696ce000 r-xp 00000000 08:01 3453 /lib/libnss_dns-2.11.1.so (deleted)
7ff2696ce000-7ff2698cd000 ---p 00005000 08:01 3453 /lib/libnss_dns-2.11.1.so (deleted)
7ff2698cd000-7ff2698ce000 r-xp 00004000 08:01 3453 /lib/libnss_dns-2.11.1.so (deleted)
7ff2698ce000-7ff2698cf000 rwxp 00005000 08:01 3453 /lib/libnss_dns-2.11.1.so (deleted)
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7ff2698d1000-7ff269ad0000 ---p 00002000 08:01 3211 /lib/libnss_mdns4_minimal.so.2
7ff269ad0000-7ff269ad1000 r-xp 00001000 08:01 3211 /lib/libnss_mdns4_minimal.so.2
7ff269ad1000-7ff269ad2000 rwxp 00002000 08:01 3211 /lib/libnss_mdns4_minimal.so.2
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7ff269eea000-7ff269eec000 rwxp 00006000 08:01 3933875 /usr/lib/jvm/java-6-sun-1.6.0.20/jre/lib/amd64/libnio.so (deleted)
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7ff269fed000-7ff269fee000 r-xp 00000000 00:00 0
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7ff26a0f6000-7ff26a1f6000 rwxp 00000000 00:00 0
7ff26a1f6000-7ff26a1f9000 ---p 00000000 00:00 0
7ff26a1f9000-7ff26a2f7000 rwxp 00000000 00:00 0
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7ff26a93f000-7ff26aa3d000 rwxp 00000000 00:00 0
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7ff26aa40000-7ff26ab3e000 rwxp 00000000 00:00 0
7ff26ab3e000-7ff26ab41000 ---p 00000000 00:00 0
7ff26ab41000-7ff26ac3f000 rwxp 00000000 00:00 0
7ff26ac3f000-7ff26ac42000 ---p 00000000 00:00 0
7ff26ac42000-7ff26ad40000 rwxp 00000000 00:00 0
7ff26ad40000-7ff26ad7f000 r-xp 00000000 08:01 9699819 /usr/lib/locale/en_US.utf8/LC_CTYPE
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7ff26d350000-7ff26df70000 ---p 00000000 00:00 0
7ff26df70000-7ff271250000 rwxp 00000000 00:00 0
7ff271250000-7ff272eb0000 rwxp 00000000 00:00 0
7ff272eb0000-7ff273ba0000 ---p 00000000 00:00 0
7ff273ba0000-7ff2c47b0000 rwxp 00000000 00:00 0
7ff2c47b0000-7ff2eb800000 rwxp 00000000 00:00 0
7ff2eb800000-7ff2ee250000 ---p 00000000 00:00 0
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7ff2ee252000-7ff2ee253000 r-xs 00003000 08:01 265415 /home/stu/hadoop-0.20.2/lib/slf4j-api-1.4.3.jar
7ff2ee253000-7ff2ee256000 r-xs 0001e000 08:01 265414 /home/stu/hadoop-0.20.2/lib/servlet-api-2.5-6.1.14.jar
7ff2ee256000-7ff2ee4e6000 rwxp 00000000 00:00 0
7ff2ee4e6000-7ff2f1256000 rwxp 00000000 00:00 0
7ff2f1256000-7ff2f1264000 r-xp 00000000 08:01 3933885 /usr/lib/jvm/java-6-sun-1.6.0.20/jre/lib/amd64/libzip.so (deleted)
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7ff2f1366000-7ff2f1369000 rwxp 00010000 08:01 3933885 /usr/lib/jvm/java-6-sun-1.6.0.20/jre/lib/amd64/libzip.so (deleted)
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7ff2f1575000-7ff2f1576000 r-xp 0000b000 08:01 4687 /lib/libnss_files-2.11.1.so (deleted)
7ff2f1576000-7ff2f1577000 rwxp 0000c000 08:01 4687 /lib/libnss_files-2.11.1.so (deleted)
7ff2f1577000-7ff2f1581000 r-xp 00000000 08:01 5844 /lib/libnss_nis-2.11.1.so (deleted)
7ff2f1581000-7ff2f1780000 ---p 0000a000 08:01 5844 /lib/libnss_nis-2.11.1.so (deleted)
7ff2f1780000-7ff2f1781000 r-xp 00009000 08:01 5844 /lib/libnss_nis-2.11.1.so (deleted)
7ff2f1781000-7ff2f1782000 rwxp 0000a000 08:01 5844 /lib/libnss_nis-2.11.1.so (deleted)
7ff2f1782000-7ff2f178a000 r-xp 00000000 08:01 3452 /lib/libnss_compat-2.11.1.so.dpkg-new (deleted)
7ff2f178a000-7ff2f1989000 ---p 00008000 08:01 3452 /lib/libnss_compat-2.11.1.so.dpkg-new (deleted)
7ff2f1989000-7ff2f198a000 r-xp 00007000 08:01 3452 /lib/libnss_compat-2.11.1.so.dpkg-new (deleted)
7ff2f198a000-7ff2f198b000 rwxp 00008000 08:01 3452 /lib/libnss_compat-2.11.1.so.dpkg-new (deleted)
7ff2f198b000-7ff2f1992000 r-xp 00000000 08:01 3933886 /usr/lib/jvm/java-6-sun-1.6.0.20/jre/lib/amd64/native_threads/libhpi.so (deleted)
7ff2f1992000-7ff2f1a93000 ---p 00007000 08:01 3933886 /usr/lib/jvm/java-6-sun-1.6.0.20/jre/lib/amd64/native_threads/libhpi.so (deleted)
7ff2f1a93000-7ff2f1a95000 rwxp 00008000 08:01 3933886 /usr/lib/jvm/java-6-sun-1.6.0.20/jre/lib/amd64/native_threads/libhpi.so (deleted)
7ff2f1a95000-7ff2f1a96000 rwxp 00000000 00:00 0
7ff2f1a96000-7ff2f1aad000 r-xp 00000000 08:01 3451 /lib/libnsl-2.11.1.so (deleted)
7ff2f1aad000-7ff2f1cac000 ---p 00017000 08:01 3451 /lib/libnsl-2.11.1.so (deleted)
7ff2f1cac000-7ff2f1cad000 r-xp 00016000 08:01 3451 /lib/libnsl-2.11.1.so (deleted)
7ff2f1cad000-7ff2f1cae000 rwxp 00017000 08:01 3451 /lib/libnsl-2.11.1.so (deleted)
7ff2f1cae000-7ff2f1cb0000 rwxp 00000000 00:00 0
7ff2f1cb0000-7ff2f1cd9000 r-xp 00000000 08:01 3933896 /usr/lib/jvm/java-6-sun-1.6.0.20/jre/lib/amd64/libjava.so (deleted)
7ff2f1cd9000-7ff2f1dd8000 ---p 00029000 08:01 3933896 /usr/lib/jvm/java-6-sun-1.6.0.20/jre/lib/amd64/libjava.so (deleted)
7ff2f1dd8000-7ff2f1ddf000 rwxp 00028000 08:01 3933896 /usr/lib/jvm/java-6-sun-1.6.0.20/jre/lib/amd64/libjava.so (deleted)
7ff2f1ddf000-7ff2f1dec000 r-xp 00000000 08:01 3933880 /usr/lib/jvm/java-6-sun-1.6.0.20/jre/lib/amd64/libverify.so (deleted)
7ff2f1dec000-7ff2f1eeb000 ---p 0000d000 08:01 3933880 /usr/lib/jvm/java-6-sun-1.6.0.20/jre/lib/amd64/libverify.so (deleted)
7ff2f1eeb000-7ff2f1eee000 rwxp 0000c000 08:01 3933880 /usr/lib/jvm/java-6-sun-1.6.0.20/jre/lib/amd64/libverify.so (deleted)
7ff2f1eee000-7ff2f1ef5000 r-xp 00000000 08:01 6444 /lib/librt-2.11.1.so (deleted)
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7ff2f20f4000-7ff2f20f5000 r-xp 00006000 08:01 6444 /lib/librt-2.11.1.so (deleted)
7ff2f20f5000-7ff2f20f6000 rwxp 00007000 08:01 6444 /lib/librt-2.11.1.so (deleted)
7ff2f20f6000-7ff2f20f9000 ---p 00000000 00:00 0
7ff2f20f9000-7ff2f21f7000 rwxp 00000000 00:00 0
7ff2f21f7000-7ff2f2279000 r-xp 00000000 08:01 3449 /lib/libm-2.11.1.so (deleted)
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7ff2f2478000-7ff2f2479000 r-xp 00081000 08:01 3449 /lib/libm-2.11.1.so (deleted)
7ff2f2479000-7ff2f247a000 rwxp 00082000 08:01 3449 /lib/libm-2.11.1.so (deleted)
7ff2f247a000-7ff2f2c2f000 r-xp 00000000 08:01 3933904 /usr/lib/jvm/java-6-sun-1.6.0.20/jre/lib/amd64/server/libjvm.so (deleted)
7ff2f2c2f000-7ff2f2d2e000 ---p 007b5000 08:01 3933904 /usr/lib/jvm/java-6-sun-1.6.0.20/jre/lib/amd64/server/libjvm.so (deleted)
7ff2f2d2e000-7ff2f2eb9000 rwxp 007b4000 08:01 3933904 /usr/lib/jvm/java-6-sun-1.6.0.20/jre/lib/amd64/server/libjvm.so (deleted)
7ff2f2eb9000-7ff2f2ef2000 rwxp 00000000 00:00 0
7ff2f2ef2000-7ff2f306c000 r-xp 00000000 08:01 1141 /lib/libc-2.11.1.so (deleted)
7ff2f306c000-7ff2f326b000 ---p 0017a000 08:01 1141 /lib/libc-2.11.1.so (deleted)
7ff2f326b000-7ff2f326f000 r-xp 00179000 08:01 1141 /lib/libc-2.11.1.so (deleted)
7ff2f326f000-7ff2f3270000 rwxp 0017d000 08:01 1141 /lib/libc-2.11.1.so (deleted)
7ff2f3270000-7ff2f3275000 rwxp 00000000 00:00 0
7ff2f3275000-7ff2f3277000 r-xp 00000000 08:01 3448 /lib/libdl-2.11.1.so (deleted)
7ff2f3277000-7ff2f3477000 ---p 00002000 08:01 3448 /lib/libdl-2.11.1.so (deleted)
7ff2f3477000-7ff2f3478000 r-xp 00002000 08:01 3448 /lib/libdl-2.11.1.so (deleted)
7ff2f3478000-7ff2f3479000 rwxp 00003000 08:01 3448 /lib/libdl-2.11.1.so (deleted)
7ff2f3479000-7ff2f3491000 r-xp 00000000 08:01 6362 /lib/libpthread-2.11.1.so (deleted)
7ff2f3491000-7ff2f3690000 ---p 00018000 08:01 6362 /lib/libpthread-2.11.1.so (deleted)
7ff2f3690000-7ff2f3691000 r-xp 00017000 08:01 6362 /lib/libpthread-2.11.1.so (deleted)
7ff2f3691000-7ff2f3692000 rwxp 00018000 08:01 6362 /lib/libpthread-2.11.1.so (deleted)
7ff2f3692000-7ff2f3696000 rwxp 00000000 00:00 0
7ff2f3696000-7ff2f36b6000 r-xp 00000000 08:01 851 /lib/ld-2.11.1.so (deleted)
7ff2f36b6000-7ff2f36b8000 r-xs 0000e000 08:01 265413 /home/stu/hadoop-0.20.2/lib/oro-2.0.8.jar
7ff2f36b8000-7ff2f36bf000 r-xs 00059000 08:01 265401 /home/stu/hadoop-0.20.2/lib/log4j-1.2.15.jar
7ff2f36bf000-7ff2f36c4000 r-xs 00028000 08:01 265378 /home/stu/hadoop-0.20.2/lib/commons-net-1.4.1.jar
7ff2f36c4000-7ff2f36c6000 r-xs 00005000 08:01 265377 /home/stu/hadoop-0.20.2/lib/commons-logging-api-1.0.4.jar
7ff2f36c6000-7ff2f36c8000 r-xs 00008000 08:01 265376 /home/stu/hadoop-0.20.2/lib/commons-logging-1.0.4.jar
7ff2f36c8000-7ff2f36cd000 r-xs 00040000 08:01 265375 /home/stu/hadoop-0.20.2/lib/commons-httpclient-3.0.1.jar
7ff2f36cd000-7ff2f36d0000 r-xs 00019000 08:01 265374 /home/stu/hadoop-0.20.2/lib/commons-el-1.0.jar
7ff2f36d0000-7ff2f36d7000 r-xs 00000000 08:01 4196746 /usr/lib/gconv/gconv-modules.cache (deleted)
7ff2f36d7000-7ff2f36e2000 rwxp 00000000 00:00 0
7ff2f36e2000-7ff2f3797000 rwxp 00000000 00:00 0
7ff2f3797000-7ff2f379a000 rwxp 00000000 00:00 0
7ff2f379a000-7ff2f37a1000 r-xp 00000000 08:01 3933865 /usr/lib/jvm/java-6-sun-1.6.0.20/jre/lib/amd64/jli/libjli.so (deleted)
7ff2f37a1000-7ff2f38a2000 ---p 00007000 08:01 3933865 /usr/lib/jvm/java-6-sun-1.6.0.20/jre/lib/amd64/jli/libjli.so (deleted)
7ff2f38a2000-7ff2f38a4000 rwxp 00008000 08:01 3933865 /usr/lib/jvm/java-6-sun-1.6.0.20/jre/lib/amd64/jli/libjli.so (deleted)
7ff2f38a4000-7ff2f38a5000 rwxp 00000000 00:00 0
7ff2f38a5000-7ff2f38a6000 r-xs 00002000 08:01 265399 /home/stu/hadoop-0.20.2/lib/kfs-0.2.2.jar
7ff2f38a6000-7ff2f38a8000 r-xs 0000a000 08:01 265373 /home/stu/hadoop-0.20.2/lib/commons-codec-1.3.jar
7ff2f38a8000-7ff2f38aa000 r-xs 00009000 08:01 265372 /home/stu/hadoop-0.20.2/lib/commons-cli-1.2.jar
7ff2f38aa000-7ff2f38b2000 rwxs 00000000 08:01 1124 /tmp/hsperfdata_stu/1662
7ff2f38b2000-7ff2f38b3000 rwxp 00000000 00:00 0
7ff2f38b3000-7ff2f38b4000 r-xp 00000000 00:00 0
7ff2f38b4000-7ff2f38b6000 rwxp 00000000 00:00 0
7ff2f38b6000-7ff2f38b7000 r-xp 00020000 08:01 851 /lib/ld-2.11.1.so (deleted)
7ff2f38b7000-7ff2f38b8000 rwxp 00021000 08:01 851 /lib/ld-2.11.1.so (deleted)
7ff2f38b8000-7ff2f38b9000 rwxp 00000000 00:00 0
7fffba251000-7fffba267000 rwxp 00000000 00:00 0 [stack]
7fffba282000-7fffba283000 r-xp 00000000 00:00 0 [vdso]
ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0 [vsyscall]

VM Arguments:
jvm_args: -Xmx2000m -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote -Dhadoop.log.dir=/home/stu/hadoop/bin/../logs -Dhadoop.log.file=hadoop-stu-datanode-ubuntu-hadoop-3.log -Dhadoop.home.dir=/home/stu/hadoop/bin/.. -Dhadoop.id.str=stu -Dhadoop.root.logger=INFO,DRFA -Djava.library.path=/home/stu/hadoop/bin/../lib/native/Linux-amd64-64 -Dhadoop.policy.file=hadoop-policy.xml
java_command: org.apache.hadoop.hdfs.server.datanode.DataNode
Launcher Type: SUN_STANDARD

Environment Variables:
JAVA_HOME=/usr/lib/jvm/java-6-sun
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/home/stu/hadoop/bin
LD_LIBRARY_PATH=/usr/lib/jvm/java-6-sun-1.6.0.20/jre/lib/amd64/server:/usr/lib/jvm/java-6-sun-1.6.0.20/jre/lib/amd64:/usr/lib/jvm/java-6-sun-1.6.0.20/jre/../lib/amd64
SHELL=/bin/bash
DISPLAY=localhost:10.0

Signal Handlers:
SIGSEGV: [libjvm.so+0x70ffd0], sa_mask[0]=0x7ffbfeff, sa_flags=0x10000004
SIGBUS: [libjvm.so+0x70ffd0], sa_mask[0]=0x7ffbfeff, sa_flags=0x10000004
SIGFPE: [libjvm.so+0x5d8cf0], sa_mask[0]=0x7ffbfeff, sa_flags=0x10000004
SIGPIPE: [libjvm.so+0x5d8cf0], sa_mask[0]=0x7ffbfeff, sa_flags=0x10000004
SIGXFSZ: [libjvm.so+0x5d8cf0], sa_mask[0]=0x7ffbfeff, sa_flags=0x10000004
SIGILL: [libjvm.so+0x5d8cf0], sa_mask[0]=0x7ffbfeff, sa_flags=0x10000004
SIGUSR1: SIG_DFL, sa_mask[0]=0x00000000, sa_flags=0x00000000
SIGUSR2: [libjvm.so+0x5db510], sa_mask[0]=0x00000000, sa_flags=0x10000004
SIGHUP: SIG_IGN, sa_mask[0]=0x00000000, sa_flags=0x00000000
SIGINT: SIG_IGN, sa_mask[0]=0x00000000, sa_flags=0x00000000
SIGTERM: [libjvm.so+0x5db260], sa_mask[0]=0x7ffbfeff, sa_flags=0x10000004
SIGQUIT: [libjvm.so+0x5db260], sa_mask[0]=0x7ffbfeff, sa_flags=0x10000004


--------------- S Y S T E M ---------------

OS:squeeze/sid

uname:Linux 2.6.32-25-generic #44-Ubuntu SMP Fri Sep 17 20:05:27 UTC 2010 x86_64
libc:glibc 2.11.1 NPTL 2.11.1
rlimit: STACK 8192k, CORE 0k, NPROC infinity, NOFILE 64000, AS infinity
load average:0.32 0.25 0.20

CPU:total 2 (2 cores per cpu, 1 threads per core) family 6 model 15 stepping 6, cmov, cx8, fxsr, mmx, sse, sse2, sse3, ssse3

Memory: 4k page, physical 4057424k(108876k free), swap 24009100k(24009100k free)

vm_info: Java HotSpot(TM) 64-Bit Server VM (16.3-b01) for linux-amd64 JRE (1.6.0_20-b02), built on Apr 12 2010 13:57:11 by "java_re" with gcc 3.2.2 (SuSE Linux)

time: Wed Jan 19 13:01:35 2011
elapsed time: 1983565 seconds


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  • Harsh J (Resolved) (JIRA) at Jan 7, 2012 at 4:16 pm
    [ https://issues.apache.org/jira/browse/HDFS-1587?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

    Harsh J resolved HDFS-1587.
    ---------------------------

    Resolution: Not A Problem

    This looked to be cause jars were updated during the runtime. The mail thread http://comments.gmane.org/gmane.comp.java.openjdk.hotspot.gc.devel/2422 has some more info.

    Resolving as Not A Problem cause it was not a Hadoop fault as determined above. Recorded here already for folks who may search later.
    JVM crash under writes: ExceptionMark destructor expects no pending exceptions
    --------------------------------------------------------------------------------

    Key: HDFS-1587
    URL: https://issues.apache.org/jira/browse/HDFS-1587
    Project: Hadoop HDFS
    Issue Type: Bug
    Components: data-node
    Affects Versions: 0.20.2
    Environment: uname:Linux 2.6.32-25-generic #44-Ubuntu SMP Fri Sep 17 20:05:27 UTC 2010 x86_64
    libc:glibc 2.11.1 NPTL 2.11.1
    rlimit: STACK 8192k, CORE 0k, NPROC infinity, NOFILE 64000, AS infinity
    load average:0.32 0.25 0.20
    CPU:total 2 (2 cores per cpu, 1 threads per core) family 6 model 15 stepping 6, cmov, cx8, fxsr, mmx, sse, sse2, sse3, ssse3
    Memory: 4k page, physical 4057424k(108876k free), swap 24009100k(24009100k free)
    vm_info: Java HotSpot(TM) 64-Bit Server VM (16.3-b01) for linux-amd64 JRE (1.6.0_20-b02), built on Apr 12 2010 13:57:11 by "java_re" with gcc 3.2.2 (SuSE Linux)
    time: Wed Jan 19 13:01:35 2011
    elapsed time: 1983565 seconds
    Reporter: Stuart Smith
    Priority: Minor

    Datanode went down due to JVM fault.
    A decent number of reads/writes going on at the time.
    To be honest, I'm not too worried about this, because it hasn't happened too frequently.
    But I thought I'd just record it.
    hs_error_pid*log was:
    #
    # A fatal error has been detected by the Java Runtime Environment:
    #
    # Internal Error (exceptions.cpp:364), pid=1662, tid=140679121118992
    # Error: ExceptionMark destructor expects no pending exceptions
    #
    # JRE version: 6.0_20-b02
    # Java VM: Java HotSpot(TM) 64-Bit Server VM (16.3-b01 mixed mode linux-amd64 )
    # If you would like to submit a bug report, please visit:
    # http://java.sun.com/webapps/bugreport/crash.jsp
    #
    --------------- T H R E A D ---------------
    Current thread (0x00007ff264330000): JavaThread "IPC Server handler 0 on 50020" daemon [_thread_in_vm, id=1755, stack(0x00007ff268faa000,0x00007ff2690ab000)]
    Stack: [0x00007ff268faa000,0x00007ff2690ab000], sp=0x00007ff2690a4680, free space=3e90000000000000018k
    Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
    V [libjvm.so+0x70f420]
    V [libjvm.so+0x2e43f6]
    V [libjvm.so+0x3333fd]
    V [libjvm.so+0x27ea18]
    V [libjvm.so+0x27e062]
    V [libjvm.so+0x27e0e6]
    V [libjvm.so+0x27faf6]
    V [libjvm.so+0x6a0c6f]
    V [libjvm.so+0x69edbb]
    V [libjvm.so+0x69dc51]
    V [libjvm.so+0x69dc80]
    V [libjvm.so+0x44251b]
    Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)
    j java.lang.ClassLoader.findBootstrapClass(Ljava/lang/String;)Ljava/lang/Class;+0
    j java.lang.ClassLoader.findBootstrapClassOrNull(Ljava/lang/String;)Ljava/lang/Class;+12
    j java.lang.ClassLoader.loadClass(Ljava/lang/String;Z)Ljava/lang/Class;+32
    j java.lang.ClassLoader.loadClass(Ljava/lang/String;Z)Ljava/lang/Class;+23
    j sun.misc.Launcher$AppClassLoader.loadClass(Ljava/lang/String;Z)Ljava/lang/Class;+41
    j java.lang.ClassLoader.loadClass(Ljava/lang/String;)Ljava/lang/Class;+3
    j java.util.ResourceBundle$RBClassLoader.loadClass(Ljava/lang/String;)Ljava/lang/Class;+10
    j java.util.ResourceBundle$Control.newBundle(Ljava/lang/String;Ljava/util/Locale;Ljava/lang/String;Ljava/lang/ClassLoader;Z)Ljava/util/ResourceBundle;+24
    j java.util.ResourceBundle.loadBundle(Ljava/util/ResourceBundle$CacheKey;Ljava/util/List;Ljava/util/ResourceBundle$Control;Z)Ljava/util/ResourceBundle;+54
    j java.util.ResourceBundle.findBundle(Ljava/util/ResourceBundle$CacheKey;Ljava/util/List;Ljava/util/List;ILjava/util/ResourceBundle$Control;Ljava/util/ResourceBundle;)Ljava/util/ResourceBundle;+213
    j java.util.ResourceBundle.findBundle(Ljava/util/ResourceBundle$CacheKey;Ljava/util/List;Ljava/util/List;ILjava/util/ResourceBundle$Control;Ljava/util/ResourceBundle;)Ljava/util/ResourceBundle;+37
    j java.util.ResourceBundle.getBundleImpl(Ljava/lang/String;Ljava/util/Locale;Ljava/lang/ClassLoader;Ljava/util/ResourceBundle$Control;)Ljava/util/ResourceBundle;+187
    j java.util.ResourceBundle.getBundle(Ljava/lang/String;)Ljava/util/ResourceBundle;+10
    j com.sun.security.auth.PolicyFile$1.run()Ljava/lang/Object;+2
    v ~StubRoutines::call_stub
    j java.security.AccessController.doPrivileged(Ljava/security/PrivilegedAction;)Ljava/lang/Object;+0
    j com.sun.security.auth.PolicyFile.<clinit>()V+7
    v ~StubRoutines::call_stub
    j java.lang.Class.forName0(Ljava/lang/String;ZLjava/lang/ClassLoader;)Ljava/lang/Class;+0
    j java.lang.Class.forName(Ljava/lang/String;ZLjava/lang/ClassLoader;)Ljava/lang/Class;+32
    j javax.security.auth.Policy$3.run()Ljava/lang/Object;+8
    v ~StubRoutines::call_stub
    J java.security.AccessController.doPrivileged(Ljava/security/PrivilegedExceptionAction;)Ljava/lang/Object;
    j javax.security.auth.Policy.getPolicyNoCheck()Ljavax/security/auth/Policy;+51
    j javax.security.auth.Policy.getPolicy()Ljavax/security/auth/Policy;+21
    j javax.security.auth.SubjectDomainCombiner$5.run()Ljava/lang/Object;+0
    v ~StubRoutines::call_stub
    j java.security.AccessController.doPrivileged(Ljava/security/PrivilegedAction;)Ljava/lang/Object;+0
    j javax.security.auth.SubjectDomainCombiner.compatPolicy()Z+7
    j javax.security.auth.SubjectDomainCombiner.<clinit>()V+10
    v ~StubRoutines::call_stub
    j javax.security.auth.Subject$2.run()Ljava/lang/Object;+28
    v ~StubRoutines::call_stub
    j java.security.AccessController.doPrivileged(Ljava/security/PrivilegedAction;)Ljava/lang/Object;+0
    j javax.security.auth.Subject.createContext(Ljavax/security/auth/Subject;Ljava/security/AccessControlContext;)Ljava/security/AccessControlContext;+9
    j javax.security.auth.Subject.doAs(Ljavax/security/auth/Subject;Ljava/security/PrivilegedExceptionAction;)Ljava/lang/Object;+39
    j org.apache.hadoop.ipc.Server$Handler.run()V+168
    v ~StubRoutines::call_stub
    --------------- P R O C E S S ---------------
    Java Threads: ( => current thread )
    0x00007ff2642f1000 JavaThread "process reaper" daemon [_thread_in_native, id=7220, stack(0x00007ff263bfc000,0x00007ff263cfd000)]
    0x000000004069b000 JavaThread "PacketResponder 1 for Block blk_-2874635287821588874_1601382" daemon [_thread_in_native, id=5238, stack(0x00007ff260bcc000,0x00007ff260ccd000)]
    0x00007ff264534800 JavaThread "org.apache.hadoop.hdfs.server.datanode.DataXceiver@47fe9d9f" daemon [_thread_in_native, id=5237, stack(0x00007ff2630f1000,0x00007ff2631f2000)]
    0x00007ff264580000 JavaThread "org.apache.hadoop.hdfs.server.datanode.DataXceiver@1af438fd" daemon [_thread_in_native, id=15176, stack(0x00007ff2632f3000,0x00007ff2633f4000)]
    0x00007ff264394800 JavaThread "org.apache.hadoop.hdfs.server.datanode.DataBlockScanner@524c71d2" daemon [_thread_blocked, id=1779, stack(0x00007ff263cfd000,0x00007ff263dfe000)]
    0x00000000402b3000 JavaThread "org.apache.hadoop.hdfs.server.datanode.DataXceiverServer@45490eb5" daemon [_thread_in_native, id=1772, stack(0x00007ff263dfe000,0x00007ff263eff000)]
    0x00007ff26443f800 JavaThread "DataNode: [/home/stu/hadoop/tmp/dfs/data,/mnt/drive2/hadoop-storage]" daemon [_thread_blocked, id=1771, stack(0x00007ff263eff000,0x00007ff264000000)]
    0x00007ff2646d7000 JavaThread "IPC Client (47) connection to ubuntu-namenode/192.168.195.82:54310 from stu" daemon [_thread_blocked, id=1770, stack(0x00007ff26809b000,0x00007ff26819c000)]
    0x00007ff2646d5000 JavaThread "IPC Server handler 14 on 50020" daemon [_thread_blocked, id=1769, stack(0x00007ff26819c000,0x00007ff26829d000)]
    0x00007ff2646d3000 JavaThread "IPC Server handler 13 on 50020" daemon [_thread_blocked, id=1768, stack(0x00007ff26829d000,0x00007ff26839e000)]
    0x00007ff2646d1000 JavaThread "IPC Server handler 12 on 50020" daemon [_thread_blocked, id=1767, stack(0x00007ff26839e000,0x00007ff26849f000)]
    0x00007ff2644c0800 JavaThread "IPC Server handler 11 on 50020" daemon [_thread_blocked, id=1766, stack(0x00007ff26849f000,0x00007ff2685a0000)]
    0x00007ff2644be800 JavaThread "IPC Server handler 10 on 50020" daemon [_thread_blocked, id=1765, stack(0x00007ff2685a0000,0x00007ff2686a1000)]
    0x00007ff2644bc800 JavaThread "IPC Server handler 9 on 50020" daemon [_thread_blocked, id=1764, stack(0x00007ff2686a1000,0x00007ff2687a2000)]
    0x00007ff2644ba800 JavaThread "IPC Server handler 8 on 50020" daemon [_thread_blocked, id=1763, stack(0x00007ff2687a2000,0x00007ff2688a3000)]
    0x00007ff2642e0800 JavaThread "IPC Server handler 7 on 50020" daemon [_thread_blocked, id=1762, stack(0x00007ff2688a3000,0x00007ff2689a4000)]
    0x00007ff2642de800 JavaThread "IPC Server handler 6 on 50020" daemon [_thread_blocked, id=1761, stack(0x00007ff2689a4000,0x00007ff268aa5000)]
    0x00007ff2642dc800 JavaThread "IPC Server handler 5 on 50020" daemon [_thread_blocked, id=1760, stack(0x00007ff268aa5000,0x00007ff268ba6000)]
    0x00007ff2647d3800 JavaThread "IPC Server handler 4 on 50020" daemon [_thread_blocked, id=1759, stack(0x00007ff268ba6000,0x00007ff268ca7000)]
    0x00007ff264396800 JavaThread "IPC Server handler 3 on 50020" daemon [_thread_blocked, id=1758, stack(0x00007ff268ca7000,0x00007ff268da8000)]
    0x00007ff264395800 JavaThread "IPC Server handler 2 on 50020" daemon [_thread_blocked, id=1757, stack(0x00007ff268da8000,0x00007ff268ea9000)]
    0x00007ff2643fe800 JavaThread "IPC Server handler 1 on 50020" daemon [_thread_blocked, id=1756, stack(0x00007ff268ea9000,0x00007ff268faa000)]
    =>0x00007ff264330000 JavaThread "IPC Server handler 0 on 50020" daemon [_thread_in_vm, id=1755, stack(0x00007ff268faa000,0x00007ff2690ab000)]
    0x00007ff2645c3800 JavaThread "IPC Server listener on 50020" daemon [_thread_in_native, id=1754, stack(0x00007ff2690ab000,0x00007ff2691ac000)]
    0x00007ff264657800 JavaThread "IPC Server Responder" daemon [_thread_in_native, id=1753, stack(0x00007ff2691ac000,0x00007ff2692ad000)]
    0x00007ff264578800 JavaThread "Timer-0" daemon [_thread_blocked, id=1752, stack(0x00007ff269be2000,0x00007ff269ce3000)]
    0x0000000040662000 JavaThread "29876954@qtp0-1 - Acceptor0 SelectChannelConnector@0.0.0.0:50075" [_thread_in_native, id=1751, stack(0x00007ff269fee000,0x00007ff26a0ef000)]
    0x0000000040208000 JavaThread "1908393212@qtp0-0" [_thread_blocked, id=1750, stack(0x00007ff269eec000,0x00007ff269fed000)]
    0x00000000401e5000 JavaThread "refreshUsed-/mnt/drive2/hadoop-storage" daemon [_thread_blocked, id=1741, stack(0x00007ff269ae1000,0x00007ff269be2000)]
    0x0000000040752800 JavaThread "refreshUsed-/home/stu/hadoop-storage/dfs/data" daemon [_thread_blocked, id=1729, stack(0x00007ff269ce3000,0x00007ff269de4000)]
    0x00007ff264228000 JavaThread "RMI TCP Accept-0" daemon [_thread_in_native, id=1699, stack(0x00007ff26a1f6000,0x00007ff26a2f7000)]
    0x00007ff264070000 JavaThread "Low Memory Detector" daemon [_thread_blocked, id=1697, stack(0x00007ff26a93c000,0x00007ff26aa3d000)]
    0x00007ff26406d800 JavaThread "CompilerThread1" daemon [_thread_blocked, id=1696, stack(0x00007ff26aa3d000,0x00007ff26ab3e000)]
    0x00007ff26406a800 JavaThread "CompilerThread0" daemon [_thread_blocked, id=1695, stack(0x00007ff26ab3e000,0x00007ff26ac3f000)]
    0x00007ff264068800 JavaThread "Signal Dispatcher" daemon [_thread_blocked, id=1694, stack(0x00007ff26ac3f000,0x00007ff26ad40000)]
    0x00007ff264048800 JavaThread "Finalizer" daemon [_thread_blocked, id=1693, stack(0x00007ff26ad7f000,0x00007ff26ae80000)]
    0x00007ff264046800 JavaThread "Reference Handler" daemon [_thread_blocked, id=1692, stack(0x00007ff26ae80000,0x00007ff26af81000)]
    0x00000000401ad800 JavaThread "main" [_thread_blocked, id=1688, stack(0x00007ff2f20f6000,0x00007ff2f21f7000)]
    Other Threads:
    0x00007ff264042000 VMThread [stack: 0x00007ff26af81000,0x00007ff26b082000] [id=1691]
    0x00007ff264237000 WatcherThread [stack: 0x00007ff26a0f5000,0x00007ff26a1f6000] [id=1700]
    VM state:not at safepoint (normal execution)
    VM Mutex/Monitor currently owned by a thread: None
    Heap
    PSYoungGen total 48128K, used 42440K [0x00007ff2c47b0000, 0x00007ff2eb800000, 0x00007ff2ee250000)
    eden space 47808K, 88% used [0x00007ff2c47b0000,0x00007ff2c70d2138,0x00007ff2c7660000)
    from space 320K, 100% used [0x00007ff2eb7b0000,0x00007ff2eb800000,0x00007ff2eb800000)
    to space 512K, 0% used [0x00007ff2eb700000,0x00007ff2eb700000,0x00007ff2eb780000)
    PSOldGen total 29056K, used 16888K [0x00007ff271250000, 0x00007ff272eb0000, 0x00007ff2c47b0000)
    object space 29056K, 58% used [0x00007ff271250000,0x00007ff2722ce2f8,0x00007ff272eb0000)
    PSPermGen total 21504K, used 16618K [0x00007ff26be50000, 0x00007ff26d350000, 0x00007ff271250000)
    object space 21504K, 77% used [0x00007ff26be50000,0x00007ff26ce8aa88,0x00007ff26d350000)
    Dynamic libraries:
    40000000-40009000 r-xp 00000000 08:01 3933705 /usr/lib/jvm/java-6-sun-1.6.0.20/jre/bin/java (deleted)
    40108000-4010a000 rwxp 00008000 08:01 3933705 /usr/lib/jvm/java-6-sun-1.6.0.20/jre/bin/java (deleted)
    401a3000-40de1000 rwxp 00000000 00:00 0 [heap]
    7ff260bcc000-7ff260bcf000 ---p 00000000 00:00 0
    7ff260bcf000-7ff260ccd000 rwxp 00000000 00:00 0
    7ff2612d3000-7ff2612d6000 ---p 00000000 00:00 0
    7ff2612d6000-7ff2613d4000 rwxp 00000000 00:00 0
    7ff2613d4000-7ff2613d7000 ---p 00000000 00:00 0
    7ff2613d7000-7ff2614d5000 rwxp 00000000 00:00 0
    7ff2614d5000-7ff2614d8000 ---p 00000000 00:00 0
    7ff2614d8000-7ff2615d6000 rwxp 00000000 00:00 0
    7ff2615d6000-7ff2615d9000 ---p 00000000 00:00 0
    7ff2615d9000-7ff2616d7000 rwxp 00000000 00:00 0
    7ff2616d7000-7ff2616da000 ---p 00000000 00:00 0
    7ff2616da000-7ff2617d8000 rwxp 00000000 00:00 0
    7ff2617d8000-7ff2617db000 ---p 00000000 00:00 0
    7ff2617db000-7ff2618d9000 rwxp 00000000 00:00 0
    7ff2618d9000-7ff2618dc000 ---p 00000000 00:00 0
    7ff2618dc000-7ff2619da000 rwxp 00000000 00:00 0
    7ff2619da000-7ff2619dd000 ---p 00000000 00:00 0
    7ff2619dd000-7ff261adb000 rwxp 00000000 00:00 0
    7ff261adb000-7ff261ade000 ---p 00000000 00:00 0
    7ff261ade000-7ff261bdc000 rwxp 00000000 00:00 0
    7ff261bdc000-7ff261bdf000 ---p 00000000 00:00 0
    7ff261bdf000-7ff261cdd000 rwxp 00000000 00:00 0
    7ff261cdd000-7ff261ce0000 ---p 00000000 00:00 0
    7ff261ce0000-7ff261dde000 rwxp 00000000 00:00 0
    7ff261dde000-7ff261de1000 ---p 00000000 00:00 0
    7ff261de1000-7ff261edf000 rwxp 00000000 00:00 0
    7ff261edf000-7ff261ee2000 ---p 00000000 00:00 0
    7ff261ee2000-7ff261fe0000 rwxp 00000000 00:00 0
    7ff261fe0000-7ff261fe3000 ---p 00000000 00:00 0
    7ff261fe3000-7ff2620e1000 rwxp 00000000 00:00 0
    7ff2620e1000-7ff2620e4000 ---p 00000000 00:00 0
    7ff2620e4000-7ff2621e2000 rwxp 00000000 00:00 0
    7ff2621e2000-7ff2621e5000 ---p 00000000 00:00 0
    7ff2621e5000-7ff2622e3000 rwxp 00000000 00:00 0
    7ff2622e3000-7ff2622e6000 ---p 00000000 00:00 0
    7ff2622e6000-7ff2623e4000 rwxp 00000000 00:00 0
    7ff2623e4000-7ff2623e7000 ---p 00000000 00:00 0
    7ff2623e7000-7ff2624e5000 rwxp 00000000 00:00 0
    7ff2624e5000-7ff2624e8000 ---p 00000000 00:00 0
    7ff2624e8000-7ff2625e6000 rwxp 00000000 00:00 0
    7ff2625e6000-7ff2625e9000 ---p 00000000 00:00 0
    7ff2625e9000-7ff2626e7000 rwxp 00000000 00:00 0
    7ff2626e7000-7ff2626ea000 ---p 00000000 00:00 0
    7ff2626ea000-7ff2627e8000 rwxp 00000000 00:00 0
    7ff2627e8000-7ff2627eb000 ---p 00000000 00:00 0
    7ff2627eb000-7ff2628e9000 rwxp 00000000 00:00 0
    7ff2628e9000-7ff2628ec000 ---p 00000000 00:00 0
    7ff2628ec000-7ff2629ea000 rwxp 00000000 00:00 0
    7ff2629ea000-7ff2629ed000 ---p 00000000 00:00 0
    7ff2629ed000-7ff262aeb000 rwxp 00000000 00:00 0
    7ff262aeb000-7ff262aee000 ---p 00000000 00:00 0
    7ff262aee000-7ff262bec000 rwxp 00000000 00:00 0
    7ff262bec000-7ff262bef000 ---p 00000000 00:00 0
    7ff262bef000-7ff262ced000 rwxp 00000000 00:00 0
    7ff262ced000-7ff262cf0000 ---p 00000000 00:00 0
    7ff262cf0000-7ff262dee000 rwxp 00000000 00:00 0
    7ff262dee000-7ff262df1000 ---p 00000000 00:00 0
    7ff262df1000-7ff262eef000 rwxp 00000000 00:00 0
    7ff262eef000-7ff262ef2000 ---p 00000000 00:00 0
    7ff262ef2000-7ff262ff0000 rwxp 00000000 00:00 0
    7ff262ff0000-7ff262ff3000 ---p 00000000 00:00 0
    7ff262ff3000-7ff2630f1000 rwxp 00000000 00:00 0
    7ff2630f1000-7ff2630f4000 ---p 00000000 00:00 0
    7ff2630f4000-7ff2631f2000 rwxp 00000000 00:00 0
    7ff2631f2000-7ff2631f5000 ---p 00000000 00:00 0
    7ff2631f5000-7ff2632f3000 rwxp 00000000 00:00 0
    7ff2632f3000-7ff2632f6000 ---p 00000000 00:00 0
    7ff2632f6000-7ff2633f4000 rwxp 00000000 00:00 0
    7ff2633f4000-7ff2633f7000 ---p 00000000 00:00 0
    7ff2633f7000-7ff2634f5000 rwxp 00000000 00:00 0
    7ff2634f5000-7ff2634f8000 ---p 00000000 00:00 0
    7ff2634f8000-7ff2635f6000 rwxp 00000000 00:00 0
    7ff2635f6000-7ff2635f9000 ---p 00000000 00:00 0
    7ff2635f9000-7ff2636f7000 rwxp 00000000 00:00 0
    7ff2637f8000-7ff2637fb000 ---p 00000000 00:00 0
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    7ff2f3696000-7ff2f36b6000 r-xp 00000000 08:01 851 /lib/ld-2.11.1.so (deleted)
    7ff2f36b6000-7ff2f36b8000 r-xs 0000e000 08:01 265413 /home/stu/hadoop-0.20.2/lib/oro-2.0.8.jar
    7ff2f36b8000-7ff2f36bf000 r-xs 00059000 08:01 265401 /home/stu/hadoop-0.20.2/lib/log4j-1.2.15.jar
    7ff2f36bf000-7ff2f36c4000 r-xs 00028000 08:01 265378 /home/stu/hadoop-0.20.2/lib/commons-net-1.4.1.jar
    7ff2f36c4000-7ff2f36c6000 r-xs 00005000 08:01 265377 /home/stu/hadoop-0.20.2/lib/commons-logging-api-1.0.4.jar
    7ff2f36c6000-7ff2f36c8000 r-xs 00008000 08:01 265376 /home/stu/hadoop-0.20.2/lib/commons-logging-1.0.4.jar
    7ff2f36c8000-7ff2f36cd000 r-xs 00040000 08:01 265375 /home/stu/hadoop-0.20.2/lib/commons-httpclient-3.0.1.jar
    7ff2f36cd000-7ff2f36d0000 r-xs 00019000 08:01 265374 /home/stu/hadoop-0.20.2/lib/commons-el-1.0.jar
    7ff2f36d0000-7ff2f36d7000 r-xs 00000000 08:01 4196746 /usr/lib/gconv/gconv-modules.cache (deleted)
    7ff2f36d7000-7ff2f36e2000 rwxp 00000000 00:00 0
    7ff2f36e2000-7ff2f3797000 rwxp 00000000 00:00 0
    7ff2f3797000-7ff2f379a000 rwxp 00000000 00:00 0
    7ff2f379a000-7ff2f37a1000 r-xp 00000000 08:01 3933865 /usr/lib/jvm/java-6-sun-1.6.0.20/jre/lib/amd64/jli/libjli.so (deleted)
    7ff2f37a1000-7ff2f38a2000 ---p 00007000 08:01 3933865 /usr/lib/jvm/java-6-sun-1.6.0.20/jre/lib/amd64/jli/libjli.so (deleted)
    7ff2f38a2000-7ff2f38a4000 rwxp 00008000 08:01 3933865 /usr/lib/jvm/java-6-sun-1.6.0.20/jre/lib/amd64/jli/libjli.so (deleted)
    7ff2f38a4000-7ff2f38a5000 rwxp 00000000 00:00 0
    7ff2f38a5000-7ff2f38a6000 r-xs 00002000 08:01 265399 /home/stu/hadoop-0.20.2/lib/kfs-0.2.2.jar
    7ff2f38a6000-7ff2f38a8000 r-xs 0000a000 08:01 265373 /home/stu/hadoop-0.20.2/lib/commons-codec-1.3.jar
    7ff2f38a8000-7ff2f38aa000 r-xs 00009000 08:01 265372 /home/stu/hadoop-0.20.2/lib/commons-cli-1.2.jar
    7ff2f38aa000-7ff2f38b2000 rwxs 00000000 08:01 1124 /tmp/hsperfdata_stu/1662
    7ff2f38b2000-7ff2f38b3000 rwxp 00000000 00:00 0
    7ff2f38b3000-7ff2f38b4000 r-xp 00000000 00:00 0
    7ff2f38b4000-7ff2f38b6000 rwxp 00000000 00:00 0
    7ff2f38b6000-7ff2f38b7000 r-xp 00020000 08:01 851 /lib/ld-2.11.1.so (deleted)
    7ff2f38b7000-7ff2f38b8000 rwxp 00021000 08:01 851 /lib/ld-2.11.1.so (deleted)
    7ff2f38b8000-7ff2f38b9000 rwxp 00000000 00:00 0
    7fffba251000-7fffba267000 rwxp 00000000 00:00 0 [stack]
    7fffba282000-7fffba283000 r-xp 00000000 00:00 0 [vdso]
    ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0 [vsyscall]
    VM Arguments:
    jvm_args: -Xmx2000m -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote -Dhadoop.log.dir=/home/stu/hadoop/bin/../logs -Dhadoop.log.file=hadoop-stu-datanode-ubuntu-hadoop-3.log -Dhadoop.home.dir=/home/stu/hadoop/bin/.. -Dhadoop.id.str=stu -Dhadoop.root.logger=INFO,DRFA -Djava.library.path=/home/stu/hadoop/bin/../lib/native/Linux-amd64-64 -Dhadoop.policy.file=hadoop-policy.xml
    java_command: org.apache.hadoop.hdfs.server.datanode.DataNode
    Launcher Type: SUN_STANDARD
    Environment Variables:
    JAVA_HOME=/usr/lib/jvm/java-6-sun
    PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/home/stu/hadoop/bin
    LD_LIBRARY_PATH=/usr/lib/jvm/java-6-sun-1.6.0.20/jre/lib/amd64/server:/usr/lib/jvm/java-6-sun-1.6.0.20/jre/lib/amd64:/usr/lib/jvm/java-6-sun-1.6.0.20/jre/../lib/amd64
    SHELL=/bin/bash
    DISPLAY=localhost:10.0
    Signal Handlers:
    SIGSEGV: [libjvm.so+0x70ffd0], sa_mask[0]=0x7ffbfeff, sa_flags=0x10000004
    SIGBUS: [libjvm.so+0x70ffd0], sa_mask[0]=0x7ffbfeff, sa_flags=0x10000004
    SIGFPE: [libjvm.so+0x5d8cf0], sa_mask[0]=0x7ffbfeff, sa_flags=0x10000004
    SIGPIPE: [libjvm.so+0x5d8cf0], sa_mask[0]=0x7ffbfeff, sa_flags=0x10000004
    SIGXFSZ: [libjvm.so+0x5d8cf0], sa_mask[0]=0x7ffbfeff, sa_flags=0x10000004
    SIGILL: [libjvm.so+0x5d8cf0], sa_mask[0]=0x7ffbfeff, sa_flags=0x10000004
    SIGUSR1: SIG_DFL, sa_mask[0]=0x00000000, sa_flags=0x00000000
    SIGUSR2: [libjvm.so+0x5db510], sa_mask[0]=0x00000000, sa_flags=0x10000004
    SIGHUP: SIG_IGN, sa_mask[0]=0x00000000, sa_flags=0x00000000
    SIGINT: SIG_IGN, sa_mask[0]=0x00000000, sa_flags=0x00000000
    SIGTERM: [libjvm.so+0x5db260], sa_mask[0]=0x7ffbfeff, sa_flags=0x10000004
    SIGQUIT: [libjvm.so+0x5db260], sa_mask[0]=0x7ffbfeff, sa_flags=0x10000004
    --------------- S Y S T E M ---------------
    OS:squeeze/sid
    uname:Linux 2.6.32-25-generic #44-Ubuntu SMP Fri Sep 17 20:05:27 UTC 2010 x86_64
    libc:glibc 2.11.1 NPTL 2.11.1
    rlimit: STACK 8192k, CORE 0k, NPROC infinity, NOFILE 64000, AS infinity
    load average:0.32 0.25 0.20
    CPU:total 2 (2 cores per cpu, 1 threads per core) family 6 model 15 stepping 6, cmov, cx8, fxsr, mmx, sse, sse2, sse3, ssse3
    Memory: 4k page, physical 4057424k(108876k free), swap 24009100k(24009100k free)
    vm_info: Java HotSpot(TM) 64-Bit Server VM (16.3-b01) for linux-amd64 JRE (1.6.0_20-b02), built on Apr 12 2010 13:57:11 by "java_re" with gcc 3.2.2 (SuSE Linux)
    time: Wed Jan 19 13:01:35 2011
    elapsed time: 1983565 seconds
    --
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postedJan 20, '11 at 7:45p
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