FAQ
By the stacktraces, I think there may be a bug in MethodUtils. By
it's name it would appear to be static, with a "weak hash map" of
names to methods, but it appears that multiple threads are accessing
the same map without synchronization....

This may be wrecking havoc with the WeakReference cleanup - since
threads are reading/updating the map without the sync - which may be
making previous weak references strong again, and messing up internal
counters...

Just an idea... I don't have access to MethodUtils...

On Sep 11, 2008, at 1:47 AM, David Fertig (JIRA) wrote:


[ https://issues.apache.org/jira/browse/LUCENE-1381?
page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

David Fertig updated LUCENE-1381:
---------------------------------

Description:
With several older lucene projects already running and "stable", I
have recently written a multi-threading indexer using to the 2.3.2
release.
My volume is in the millions of documents indexed daily and I have
been stress testing for a while now. My current setup has 3 JVMs,
each running 6 threads indexing different documents, with 1
IndexWriter per JVM. For stability testing, the indexer shutsdown
and exits every 5-10 minutes, with a new JVM is started again for a
clean restart. At this rate, I have noticed an rare, but eventually
consistent internal hang/deadlock in all indexer threads while
parsing documents. My 'manager' thread is alive and regularly
polling the indexer threads and displaying their state variables,
but the indexer threads themselves appear not to be making progress
while using up nearly 100% of available CPU. Memory usage is
relativly low and stable at 481m out of 2048m available.

Most stack traces, and STAY in this state even after repeated
inspections: (pressing CTRL-\ in active JVM window)
----------
Full thread dump Java HotSpot(TM) 64-Bit Server VM (1.5.0_16-b02
mixed mode):

"Thread-6" prio=1 tid=0x0000002b25750920 nid=0x34f6 runnable
[0x0000000041465000..0x0000000041465db0]
at java.util.WeakHashMap.eq(WeakHashMap.java:254)
at java.util.WeakHashMap.get(WeakHashMap.java:345)
at
org.apache.commons.beanutils.MethodUtils.getMatchingAccessibleMethod
(MethodUtils.java:530)
at org.apache.commons.beanutils.MethodUtils.invokeMethod
(MethodUtils.java:209)
at org.apache.commons.digester.CallMethodRule.end
(CallMethodRule.java:625)
at org.apache.commons.digester.Rule.end(Rule.java:230)
at org.apache.commons.digester.Digester.endElement
(Digester.java:1130)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElemen
t(AbstractSAXParser.java:633)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl
.scanEndElement(XMLDocumentFragmentScannerImpl.java:1241)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl
$FragmentContentDispatcher.dispatch
(XMLDocumentFragmentScannerImpl.java:1685)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl
.scanDocument(XMLDocumentFragmentScannerImpl.java:368)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse
(XML11Configuration.java:834)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse
(XML11Configuration.java:764)
at
com.sun.org.apache.xerces.internal.parsers.XMLParser.parse
(XMLParser.java:148)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse
(AbstractSAXParser.java:1242)
at org.apache.commons.digester.Digester.parse(Digester.java:
1685)
...

"Thread-5" prio=1 tid=0x0000002b25754eb0 nid=0x34f5 runnable
[0x0000000041364000..0x0000000041364d30]
at java.lang.String.equals(String.java:858)
at org.apache.commons.beanutils.MethodUtils
$MethodDescriptor.equals(MethodUtils.java:833)
at java.util.WeakHashMap.eq(WeakHashMap.java:254)
at java.util.WeakHashMap.get(WeakHashMap.java:345)
at
org.apache.commons.beanutils.MethodUtils.getMatchingAccessibleMethod
(MethodUtils.java:530)
at org.apache.commons.beanutils.MethodUtils.invokeMethod
(MethodUtils.java:209)
at org.apache.commons.digester.CallMethodRule.end
(CallMethodRule.java:625)
at org.apache.commons.digester.Rule.end(Rule.java:230)
at org.apache.commons.digester.Digester.endElement
(Digester.java:1130)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElemen
t(AbstractSAXParser.java:633)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl
.scanEndElement(XMLDocumentFragmentScannerImpl.java:1241)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl
$FragmentContentDispatcher.dispatch
(XMLDocumentFragmentScannerImpl.java:1685)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl
.scanDocument(XMLDocumentFragmentScannerImpl.java:368)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse
(XML11Configuration.java:834)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse
(XML11Configuration.java:764)
at
com.sun.org.apache.xerces.internal.parsers.XMLParser.parse
(XMLParser.java:148)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse
(AbstractSAXParser.java:1242)
at org.apache.commons.digester.Digester.parse(Digester.java:
1685)
...

"Thread-4" prio=1 tid=0x0000002b25754860 nid=0x34f4 runnable
[0x0000000041263000..0x0000000041263cb0]
at java.lang.String.equals(String.java:858)
at org.apache.commons.beanutils.MethodUtils
$MethodDescriptor.equals(MethodUtils.java:833)
at java.util.WeakHashMap.eq(WeakHashMap.java:254)
at java.util.WeakHashMap.get(WeakHashMap.java:345)
at
org.apache.commons.beanutils.MethodUtils.getMatchingAccessibleMethod
(MethodUtils.java:530)
at org.apache.commons.beanutils.MethodUtils.invokeMethod
(MethodUtils.java:209)
at org.apache.commons.digester.CallMethodRule.end
(CallMethodRule.java:625)
at org.apache.commons.digester.Rule.end(Rule.java:230)
at org.apache.commons.digester.Digester.endElement
(Digester.java:1130)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElemen
t(AbstractSAXParser.java:633)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl
.scanEndElement(XMLDocumentFragmentScannerImpl.java:1241)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl
$FragmentContentDispatcher.dispatch
(XMLDocumentFragmentScannerImpl.java:1685)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl
.scanDocument(XMLDocumentFragmentScannerImpl.java:368)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse
(XML11Configuration.java:834)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse
(XML11Configuration.java:764)
at
com.sun.org.apache.xerces.internal.parsers.XMLParser.parse
(XMLParser.java:148)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse
(AbstractSAXParser.java:1242)
at org.apache.commons.digester.Digester.parse(Digester.java:
1685)
...


"Thread-3" prio=1 tid=0x0000002b2509d360 nid=0x34f3 runnable
[0x0000000041162000..0x0000000041162c30]
at java.lang.String.equals(String.java:858)
at org.apache.commons.beanutils.MethodUtils
$MethodDescriptor.equals(MethodUtils.java:833)
at java.util.WeakHashMap.eq(WeakHashMap.java:254)
at java.util.WeakHashMap.get(WeakHashMap.java:345)
at
org.apache.commons.beanutils.MethodUtils.getMatchingAccessibleMethod
(MethodUtils.java:530)
at org.apache.commons.beanutils.MethodUtils.invokeMethod
(MethodUtils.java:209)
at org.apache.commons.digester.CallMethodRule.end
(CallMethodRule.java:625)
at org.apache.commons.digester.Rule.end(Rule.java:230)
at org.apache.commons.digester.Digester.endElement
(Digester.java:1130)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElemen
t(AbstractSAXParser.java:633)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl
.scanEndElement(XMLDocumentFragmentScannerImpl.java:1241)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl
$FragmentContentDispatcher.dispatch
(XMLDocumentFragmentScannerImpl.java:1685)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl
.scanDocument(XMLDocumentFragmentScannerImpl.java:368)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse
(XML11Configuration.java:834)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse
(XML11Configuration.java:764)
at
com.sun.org.apache.xerces.internal.parsers.XMLParser.parse
(XMLParser.java:148)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse
(AbstractSAXParser.java:1242)
at org.apache.commons.digester.Digester.parse(Digester.java:
1685)
...


"Thread-2" prio=1 tid=0x0000002b25083e00 nid=0x34f2 runnable
[0x0000000041061000..0x0000000041061bb0]
at java.util.WeakHashMap.expungeStaleEntries
(WeakHashMap.java:289)
at java.util.WeakHashMap.getTable(WeakHashMap.java:297)
at java.util.WeakHashMap.get(WeakHashMap.java:341)
at
org.apache.commons.beanutils.MethodUtils.getMatchingAccessibleMethod
(MethodUtils.java:530)
at org.apache.commons.beanutils.MethodUtils.invokeMethod
(MethodUtils.java:209)
at org.apache.commons.digester.CallMethodRule.end
(CallMethodRule.java:625)
at org.apache.commons.digester.Rule.end(Rule.java:230)
at org.apache.commons.digester.Digester.endElement
(Digester.java:1130)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElemen
t(AbstractSAXParser.java:633)
at
com.sun.org.apache.xerces.internal.parsers.AbstractXMLDocumentParser.e
mptyElement(AbstractXMLDocumentParser.java:221)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl
.scanStartElement(XMLDocumentFragmentScannerImpl.java:872)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl
$FragmentContentDispatcher.dispatch
(XMLDocumentFragmentScannerImpl.java:1693)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl
.scanDocument(XMLDocumentFragmentScannerImpl.java:368)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse
(XML11Configuration.java:834)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse
(XML11Configuration.java:764)
at
com.sun.org.apache.xerces.internal.parsers.XMLParser.parse
(XMLParser.java:148)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse
(AbstractSAXParser.java:1242)
at org.apache.commons.digester.Digester.parse(Digester.java:
1685)
...


"Thread-1" prio=1 tid=0x0000002b2509a4a0 nid=0x34f1 runnable
[0x0000000040f60000..0x0000000040f60b30]
at java.util.WeakHashMap.expungeStaleEntries
(WeakHashMap.java:289)
at java.util.WeakHashMap.getTable(WeakHashMap.java:297)
at java.util.WeakHashMap.get(WeakHashMap.java:341)
at
org.apache.commons.beanutils.MethodUtils.getMatchingAccessibleMethod
(MethodUtils.java:530)
at org.apache.commons.beanutils.MethodUtils.invokeMethod
(MethodUtils.java:209)
at org.apache.commons.digester.CallMethodRule.end
(CallMethodRule.java:625)
at org.apache.commons.digester.Rule.end(Rule.java:230)
at org.apache.commons.digester.Digester.endElement
(Digester.java:1130)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElemen
t(AbstractSAXParser.java:633)
at
com.sun.org.apache.xerces.internal.parsers.AbstractXMLDocumentParser.e
mptyElement(AbstractXMLDocumentParser.java:221)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl
.scanStartElement(XMLDocumentFragmentScannerImpl.java:872)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl
$FragmentContentDispatcher.dispatch
(XMLDocumentFragmentScannerImpl.java:1693)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl
.scanDocument(XMLDocumentFragmentScannerImpl.java:368)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse
(XML11Configuration.java:834)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse
(XML11Configuration.java:764)
at
com.sun.org.apache.xerces.internal.parsers.XMLParser.parse
(XMLParser.java:148)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse
(AbstractSAXParser.java:1242)
at org.apache.commons.digester.Digester.parse(Digester.java:
1685)
...


"Low Memory Detector" daemon prio=1 tid=0x0000002b25002430
nid=0x34ef runnable [0x0000000000000000..0x0000000000000000]

"CompilerThread1" daemon prio=1 tid=0x0000002b250009d0 nid=0x34ee
waiting on condition [0x0000000000000000..0x0000000040c5c6d0]

"CompilerThread0" daemon prio=1 tid=0x0000002b220c2ce0 nid=0x34ed
waiting on condition [0x0000000000000000..0x0000000040b5b650]

"AdapterThread" daemon prio=1 tid=0x0000002b220c1750 nid=0x34ec
waiting on condition [0x0000000000000000..0x0000000000000000]

"Signal Dispatcher" daemon prio=1 tid=0x0000002b220c02d0 nid=0x34eb
runnable [0x0000000000000000..0x0000000000000000]

"Finalizer" daemon prio=1 tid=0x0000002b220ae1e0 nid=0x34ea in
Object.wait() [0x0000000040859000..0x0000000040859bb0]
at java.lang.Object.wait(Native Method)
- waiting on <0x0000002b0a8d7408> (a
java.lang.ref.ReferenceQueue$Lock)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:
120)
- locked <0x0000002b0a8d7408> (a
java.lang.ref.ReferenceQueue$Lock)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:
136)
at java.lang.ref.Finalizer$FinalizerThread.run
(Finalizer.java:159)

"Reference Handler" daemon prio=1 tid=0x0000002b220ab980 nid=0x34e9
in Object.wait() [0x0000000040758000..0x0000000040758b30]
at java.lang.Object.wait(Native Method)
- waiting on <0x0000002b0a7da3b0> (a java.lang.ref.Reference
$Lock)
at java.lang.Object.wait(Object.java:474)
at java.lang.ref.Reference$ReferenceHandler.run
(Reference.java:116)
- locked <0x0000002b0a7da3b0> (a java.lang.ref.Reference$Lock)

"main" prio=1 tid=0x0000000040115ea0 nid=0x34e3 waiting on
condition [0x0000007fbfffc000..0x0000007fbfffd280]
at java.lang.Thread.sleep(Native Method)
...


"VM Thread" prio=1 tid=0x0000002b220a7480 nid=0x34e8 runnable

"GC task thread#0 (ParallelGC)" prio=1 tid=0x0000000040133fe0
nid=0x34e4 runnable

"GC task thread#1 (ParallelGC)" prio=1 tid=0x0000000040135630
nid=0x34e5 runnable

"GC task thread#2 (ParallelGC)" prio=1 tid=0x0000000040136480
nid=0x34e6 runnable

"GC task thread#3 (ParallelGC)" prio=1 tid=0x0000000040137300
nid=0x34e7 runnable

"VM Periodic Task Thread" prio=1 tid=0x0000002b25004e10 nid=0x34f0
waiting on condition


was:
With several older lucene projects already running and "stable", I
have recently written a multi-threading indexer using to the 2.3.2
release.
My volume is in the millions of documents indexed daily and I have
been stress testing for a while now. My current setup has 3 JVMs,
each running 6 threads indexing different documents, with 1
IndexWriter per JVM. For stability testing, the indexer shutsdown
and exits every 5-10 minutes, with a new JVM is started again for a
clean restart. At this rate, I have noticed an rare, but eventually
consistent internal hang/deadlock in all indexer threads while
parsing documents. My 'manager' thread is alive and regularly
polling the indexer threads and displaying their state variables,
but the indexer threads themselves appear not to be making progress
while using up nearly 100% of available CPU. Memory usage is
relativly low and stable at 481m out of 2048m available.

Most stack traces, and STAY in this state even after repeated
inspections: (pressing CTRL-\ in active JVM window)
----------
Full thread dump Java HotSpot(TM) 64-Bit Server VM (1.5.0_16-b02
mixed mode):

"Thread-6" prio=1 tid=0x0000002b25750920 nid=0x34f6 runnable
[0x0000000041465000..0x0000000041465db0]
at java.util.WeakHashMap.eq(WeakHashMap.java:254)
at java.util.WeakHashMap.get(WeakHashMap.java:345)
at
org.apache.commons.beanutils.MethodUtils.getMatchingAccessibleMethod
(MethodUtils.java:530)
at org.apache.commons.beanutils.MethodUtils.invokeMethod
(MethodUtils.java:209)
at org.apache.commons.digester.CallMethodRule.end
(CallMethodRule.java:625)
at org.apache.commons.digester.Rule.end(Rule.java:230)
at org.apache.commons.digester.Digester.endElement
(Digester.java:1130)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElemen
t(AbstractSAXParser.java:633)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl
.scanEndElement(XMLDocumentFragmentScannerImpl.java:1241)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl
$FragmentContentDispatcher.dispatch
(XMLDocumentFragmentScannerImpl.java:1685)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl
.scanDocument(XMLDocumentFragmentScannerImpl.java:368)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse
(XML11Configuration.java:834)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse
(XML11Configuration.java:764)
at
com.sun.org.apache.xerces.internal.parsers.XMLParser.parse
(XMLParser.java:148)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse
(AbstractSAXParser.java:1242)
at org.apache.commons.digester.Digester.parse(Digester.java:
1685)
at com.cymfony.dci.lucene.IndexerThread.indexFile
(IndexerThread.java:199)
at com.cymfony.dci.lucene.IndexerThread.indexDirectory
(IndexerThread.java:142)
at com.cymfony.dci.lucene.IndexerThread.run
(IndexerThread.java:81)

"Thread-5" prio=1 tid=0x0000002b25754eb0 nid=0x34f5 runnable
[0x0000000041364000..0x0000000041364d30]
at java.lang.String.equals(String.java:858)
at org.apache.commons.beanutils.MethodUtils
$MethodDescriptor.equals(MethodUtils.java:833)
at java.util.WeakHashMap.eq(WeakHashMap.java:254)
at java.util.WeakHashMap.get(WeakHashMap.java:345)
at
org.apache.commons.beanutils.MethodUtils.getMatchingAccessibleMethod
(MethodUtils.java:530)
at org.apache.commons.beanutils.MethodUtils.invokeMethod
(MethodUtils.java:209)
at org.apache.commons.digester.CallMethodRule.end
(CallMethodRule.java:625)
at org.apache.commons.digester.Rule.end(Rule.java:230)
at org.apache.commons.digester.Digester.endElement
(Digester.java:1130)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElemen
t(AbstractSAXParser.java:633)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl
.scanEndElement(XMLDocumentFragmentScannerImpl.java:1241)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl
$FragmentContentDispatcher.dispatch
(XMLDocumentFragmentScannerImpl.java:1685)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl
.scanDocument(XMLDocumentFragmentScannerImpl.java:368)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse
(XML11Configuration.java:834)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse
(XML11Configuration.java:764)
at
com.sun.org.apache.xerces.internal.parsers.XMLParser.parse
(XMLParser.java:148)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse
(AbstractSAXParser.java:1242)
at org.apache.commons.digester.Digester.parse(Digester.java:
1685)
at com.cymfony.dci.lucene.IndexerThread.indexFile
(IndexerThread.java:199)
at com.cymfony.dci.lucene.IndexerThread.indexDirectory
(IndexerThread.java:142)
at com.cymfony.dci.lucene.IndexerThread.run
(IndexerThread.java:81)

"Thread-4" prio=1 tid=0x0000002b25754860 nid=0x34f4 runnable
[0x0000000041263000..0x0000000041263cb0]
at java.lang.String.equals(String.java:858)
at org.apache.commons.beanutils.MethodUtils
$MethodDescriptor.equals(MethodUtils.java:833)
at java.util.WeakHashMap.eq(WeakHashMap.java:254)
at java.util.WeakHashMap.get(WeakHashMap.java:345)
at
org.apache.commons.beanutils.MethodUtils.getMatchingAccessibleMethod
(MethodUtils.java:530)
at org.apache.commons.beanutils.MethodUtils.invokeMethod
(MethodUtils.java:209)
at org.apache.commons.digester.CallMethodRule.end
(CallMethodRule.java:625)
at org.apache.commons.digester.Rule.end(Rule.java:230)
at org.apache.commons.digester.Digester.endElement
(Digester.java:1130)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElemen
t(AbstractSAXParser.java:633)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl
.scanEndElement(XMLDocumentFragmentScannerImpl.java:1241)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl
$FragmentContentDispatcher.dispatch
(XMLDocumentFragmentScannerImpl.java:1685)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl
.scanDocument(XMLDocumentFragmentScannerImpl.java:368)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse
(XML11Configuration.java:834)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse
(XML11Configuration.java:764)
at
com.sun.org.apache.xerces.internal.parsers.XMLParser.parse
(XMLParser.java:148)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse
(AbstractSAXParser.java:1242)
at org.apache.commons.digester.Digester.parse(Digester.java:
1685)
at com.cymfony.dci.lucene.IndexerThread.indexFile
(IndexerThread.java:199)
at com.cymfony.dci.lucene.IndexerThread.indexDirectory
(IndexerThread.java:142)
at com.cymfony.dci.lucene.IndexerThread.run
(IndexerThread.java:81)

"Thread-3" prio=1 tid=0x0000002b2509d360 nid=0x34f3 runnable
[0x0000000041162000..0x0000000041162c30]
at java.lang.String.equals(String.java:858)
at org.apache.commons.beanutils.MethodUtils
$MethodDescriptor.equals(MethodUtils.java:833)
at java.util.WeakHashMap.eq(WeakHashMap.java:254)
at java.util.WeakHashMap.get(WeakHashMap.java:345)
at
org.apache.commons.beanutils.MethodUtils.getMatchingAccessibleMethod
(MethodUtils.java:530)
at org.apache.commons.beanutils.MethodUtils.invokeMethod
(MethodUtils.java:209)
at org.apache.commons.digester.CallMethodRule.end
(CallMethodRule.java:625)
at org.apache.commons.digester.Rule.end(Rule.java:230)
at org.apache.commons.digester.Digester.endElement
(Digester.java:1130)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElemen
t(AbstractSAXParser.java:633)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl
.scanEndElement(XMLDocumentFragmentScannerImpl.java:1241)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl
$FragmentContentDispatcher.dispatch
(XMLDocumentFragmentScannerImpl.java:1685)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl
.scanDocument(XMLDocumentFragmentScannerImpl.java:368)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse
(XML11Configuration.java:834)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse
(XML11Configuration.java:764)
at
com.sun.org.apache.xerces.internal.parsers.XMLParser.parse
(XMLParser.java:148)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse
(AbstractSAXParser.java:1242)
at org.apache.commons.digester.Digester.parse(Digester.java:
1685)
at com.cymfony.dci.lucene.IndexerThread.indexFile
(IndexerThread.java:199)
at com.cymfony.dci.lucene.IndexerThread.indexDirectory
(IndexerThread.java:142)
at com.cymfony.dci.lucene.IndexerThread.run
(IndexerThread.java:81)

"Thread-2" prio=1 tid=0x0000002b25083e00 nid=0x34f2 runnable
[0x0000000041061000..0x0000000041061bb0]
at java.util.WeakHashMap.expungeStaleEntries
(WeakHashMap.java:289)
at java.util.WeakHashMap.getTable(WeakHashMap.java:297)
at java.util.WeakHashMap.get(WeakHashMap.java:341)
at
org.apache.commons.beanutils.MethodUtils.getMatchingAccessibleMethod
(MethodUtils.java:530)
at org.apache.commons.beanutils.MethodUtils.invokeMethod
(MethodUtils.java:209)
at org.apache.commons.digester.CallMethodRule.end
(CallMethodRule.java:625)
at org.apache.commons.digester.Rule.end(Rule.java:230)
at org.apache.commons.digester.Digester.endElement
(Digester.java:1130)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElemen
t(AbstractSAXParser.java:633)
at
com.sun.org.apache.xerces.internal.parsers.AbstractXMLDocumentParser.e
mptyElement(AbstractXMLDocumentParser.java:221)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl
.scanStartElement(XMLDocumentFragmentScannerImpl.java:872)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl
$FragmentContentDispatcher.dispatch
(XMLDocumentFragmentScannerImpl.java:1693)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl
.scanDocument(XMLDocumentFragmentScannerImpl.java:368)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse
(XML11Configuration.java:834)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse
(XML11Configuration.java:764)
at
com.sun.org.apache.xerces.internal.parsers.XMLParser.parse
(XMLParser.java:148)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse
(AbstractSAXParser.java:1242)
at org.apache.commons.digester.Digester.parse(Digester.java:
1685)
at com.cymfony.dci.lucene.IndexerThread.indexFile
(IndexerThread.java:199)
at com.cymfony.dci.lucene.IndexerThread.indexDirectory
(IndexerThread.java:142)
at com.cymfony.dci.lucene.IndexerThread.run
(IndexerThread.java:81)

"Thread-1" prio=1 tid=0x0000002b2509a4a0 nid=0x34f1 runnable
[0x0000000040f60000..0x0000000040f60b30]
at java.util.WeakHashMap.expungeStaleEntries
(WeakHashMap.java:289)
at java.util.WeakHashMap.getTable(WeakHashMap.java:297)
at java.util.WeakHashMap.get(WeakHashMap.java:341)
at
org.apache.commons.beanutils.MethodUtils.getMatchingAccessibleMethod
(MethodUtils.java:530)
at org.apache.commons.beanutils.MethodUtils.invokeMethod
(MethodUtils.java:209)
at org.apache.commons.digester.CallMethodRule.end
(CallMethodRule.java:625)
at org.apache.commons.digester.Rule.end(Rule.java:230)
at org.apache.commons.digester.Digester.endElement
(Digester.java:1130)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElemen
t(AbstractSAXParser.java:633)
at
com.sun.org.apache.xerces.internal.parsers.AbstractXMLDocumentParser.e
mptyElement(AbstractXMLDocumentParser.java:221)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl
.scanStartElement(XMLDocumentFragmentScannerImpl.java:872)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl
$FragmentContentDispatcher.dispatch
(XMLDocumentFragmentScannerImpl.java:1693)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl
.scanDocument(XMLDocumentFragmentScannerImpl.java:368)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse
(XML11Configuration.java:834)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse
(XML11Configuration.java:764)
at
com.sun.org.apache.xerces.internal.parsers.XMLParser.parse
(XMLParser.java:148)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse
(AbstractSAXParser.java:1242)
at org.apache.commons.digester.Digester.parse(Digester.java:
1685)
at com.cymfony.dci.lucene.IndexerThread.indexFile
(IndexerThread.java:199)
at com.cymfony.dci.lucene.IndexerThread.indexDirectory
(IndexerThread.java:142)
at com.cymfony.dci.lucene.IndexerThread.run
(IndexerThread.java:81)

"Low Memory Detector" daemon prio=1 tid=0x0000002b25002430
nid=0x34ef runnable [0x0000000000000000..0x0000000000000000]

"CompilerThread1" daemon prio=1 tid=0x0000002b250009d0 nid=0x34ee
waiting on condition [0x0000000000000000..0x0000000040c5c6d0]

"CompilerThread0" daemon prio=1 tid=0x0000002b220c2ce0 nid=0x34ed
waiting on condition [0x0000000000000000..0x0000000040b5b650]

"AdapterThread" daemon prio=1 tid=0x0000002b220c1750 nid=0x34ec
waiting on condition [0x0000000000000000..0x0000000000000000]

"Signal Dispatcher" daemon prio=1 tid=0x0000002b220c02d0 nid=0x34eb
runnable [0x0000000000000000..0x0000000000000000]

"Finalizer" daemon prio=1 tid=0x0000002b220ae1e0 nid=0x34ea in
Object.wait() [0x0000000040859000..0x0000000040859bb0]
at java.lang.Object.wait(Native Method)
- waiting on <0x0000002b0a8d7408> (a
java.lang.ref.ReferenceQueue$Lock)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:
120)
- locked <0x0000002b0a8d7408> (a
java.lang.ref.ReferenceQueue$Lock)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:
136)
at java.lang.ref.Finalizer$FinalizerThread.run
(Finalizer.java:159)

"Reference Handler" daemon prio=1 tid=0x0000002b220ab980 nid=0x34e9
in Object.wait() [0x0000000040758000..0x0000000040758b30]
at java.lang.Object.wait(Native Method)
- waiting on <0x0000002b0a7da3b0> (a java.lang.ref.Reference
$Lock)
at java.lang.Object.wait(Object.java:474)
at java.lang.ref.Reference$ReferenceHandler.run
(Reference.java:116)
- locked <0x0000002b0a7da3b0> (a java.lang.ref.Reference$Lock)

"main" prio=1 tid=0x0000000040115ea0 nid=0x34e3 waiting on
condition [0x0000007fbfffc000..0x0000007fbfffd280]
at java.lang.Thread.sleep(Native Method)
at
com.cymfony.dci.lucene.IndexerThreadManager.stopAndWaitForIndexerThrea
ds(IndexerThreadManager.java:227)
at com.cymfony.dci.lucene.IndexerThreadManager.indexDocs
(IndexerThreadManager.java:167)
at com.cymfony.dci.lucene.Indexer.indexDocs(Indexer.java:48)
at com.cymfony.dci.lucene.Indexer.indexUnprocessedDocs
(Indexer.java:136)
at com.cymfony.dci.lucene.CommandLineIndexer.main
(CommandLineIndexer.java:37)

"VM Thread" prio=1 tid=0x0000002b220a7480 nid=0x34e8 runnable

"GC task thread#0 (ParallelGC)" prio=1 tid=0x0000000040133fe0
nid=0x34e4 runnable

"GC task thread#1 (ParallelGC)" prio=1 tid=0x0000000040135630
nid=0x34e5 runnable

"GC task thread#2 (ParallelGC)" prio=1 tid=0x0000000040136480
nid=0x34e6 runnable

"GC task thread#3 (ParallelGC)" prio=1 tid=0x0000000040137300
nid=0x34e7 runnable

"VM Periodic Task Thread" prio=1 tid=0x0000002b25004e10 nid=0x34f0
waiting on condition


Hanging while indexing/digesting on multiple threads
----------------------------------------------------

Key: LUCENE-1381
URL: https://issues.apache.org/jira/browse/
LUCENE-1381
Project: Lucene - Java
Issue Type: Bug
Components: Analysis
Affects Versions: 2.3.2
Environment: Java HotSpot(TM) 64-Bit Server VM (1.5.0_16-
b02 mixed mode) on 2.6.9-78.0.1.ELsmp #1 SMP x86_64 x86_64 x86_64
GNU/Linux
Reporter: David Fertig

With several older lucene projects already running and "stable", I
have recently written a multi-threading indexer using to the 2.3.2
release.
My volume is in the millions of documents indexed daily and I have
been stress testing for a while now. My current setup has 3 JVMs,
each running 6 threads indexing different documents, with 1
IndexWriter per JVM. For stability testing, the indexer shutsdown
and exits every 5-10 minutes, with a new JVM is started again for
a clean restart. At this rate, I have noticed an rare, but
eventually consistent internal hang/deadlock in all indexer
threads while parsing documents. My 'manager' thread is alive and
regularly polling the indexer threads and displaying their state
variables, but the indexer threads themselves appear not to be
making progress while using up nearly 100% of available CPU.
Memory usage is relativly low and stable at 481m out of 2048m
available.
Most stack traces, and STAY in this state even after repeated
inspections: (pressing CTRL-\ in active JVM window)
----------
Full thread dump Java HotSpot(TM) 64-Bit Server VM (1.5.0_16-b02
mixed mode):
"Thread-6" prio=1 tid=0x0000002b25750920 nid=0x34f6 runnable
[0x0000000041465000..0x0000000041465db0]
at java.util.WeakHashMap.eq(WeakHashMap.java:254)
at java.util.WeakHashMap.get(WeakHashMap.java:345)
at
org.apache.commons.beanutils.MethodUtils.getMatchingAccessibleMethod(
MethodUtils.java:530)
at org.apache.commons.beanutils.MethodUtils.invokeMethod
(MethodUtils.java:209)
at org.apache.commons.digester.CallMethodRule.end
(CallMethodRule.java:625)
at org.apache.commons.digester.Rule.end(Rule.java:230)
at org.apache.commons.digester.Digester.endElement
(Digester.java:1130)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endEleme
nt(AbstractSAXParser.java:633)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImp
l.scanEndElement(XMLDocumentFragmentScannerImpl.java:1241)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImp
l$FragmentContentDispatcher.dispatch
(XMLDocumentFragmentScannerImpl.java:1685)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImp
l.scanDocument(XMLDocumentFragmentScannerImpl.java:368)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse
(XML11Configuration.java:834)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse
(XML11Configuration.java:764)
at
com.sun.org.apache.xerces.internal.parsers.XMLParser.parse
(XMLParser.java:148)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse
(AbstractSAXParser.java:1242)
at org.apache.commons.digester.Digester.parse
(Digester.java:1685)
...
"Thread-5" prio=1 tid=0x0000002b25754eb0 nid=0x34f5 runnable
[0x0000000041364000..0x0000000041364d30]
at java.lang.String.equals(String.java:858)
at org.apache.commons.beanutils.MethodUtils
$MethodDescriptor.equals(MethodUtils.java:833)
at java.util.WeakHashMap.eq(WeakHashMap.java:254)
at java.util.WeakHashMap.get(WeakHashMap.java:345)
at
org.apache.commons.beanutils.MethodUtils.getMatchingAccessibleMethod(
MethodUtils.java:530)
at org.apache.commons.beanutils.MethodUtils.invokeMethod
(MethodUtils.java:209)
at org.apache.commons.digester.CallMethodRule.end
(CallMethodRule.java:625)
at org.apache.commons.digester.Rule.end(Rule.java:230)
at org.apache.commons.digester.Digester.endElement
(Digester.java:1130)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endEleme
nt(AbstractSAXParser.java:633)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImp
l.scanEndElement(XMLDocumentFragmentScannerImpl.java:1241)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImp
l$FragmentContentDispatcher.dispatch
(XMLDocumentFragmentScannerImpl.java:1685)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImp
l.scanDocument(XMLDocumentFragmentScannerImpl.java:368)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse
(XML11Configuration.java:834)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse
(XML11Configuration.java:764)
at
com.sun.org.apache.xerces.internal.parsers.XMLParser.parse
(XMLParser.java:148)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse
(AbstractSAXParser.java:1242)
at org.apache.commons.digester.Digester.parse
(Digester.java:1685)
...
"Thread-4" prio=1 tid=0x0000002b25754860 nid=0x34f4 runnable
[0x0000000041263000..0x0000000041263cb0]
at java.lang.String.equals(String.java:858)
at org.apache.commons.beanutils.MethodUtils
$MethodDescriptor.equals(MethodUtils.java:833)
at java.util.WeakHashMap.eq(WeakHashMap.java:254)
at java.util.WeakHashMap.get(WeakHashMap.java:345)
at
org.apache.commons.beanutils.MethodUtils.getMatchingAccessibleMethod(
MethodUtils.java:530)
at org.apache.commons.beanutils.MethodUtils.invokeMethod
(MethodUtils.java:209)
at org.apache.commons.digester.CallMethodRule.end
(CallMethodRule.java:625)
at org.apache.commons.digester.Rule.end(Rule.java:230)
at org.apache.commons.digester.Digester.endElement
(Digester.java:1130)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endEleme
nt(AbstractSAXParser.java:633)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImp
l.scanEndElement(XMLDocumentFragmentScannerImpl.java:1241)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImp
l$FragmentContentDispatcher.dispatch
(XMLDocumentFragmentScannerImpl.java:1685)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImp
l.scanDocument(XMLDocumentFragmentScannerImpl.java:368)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse
(XML11Configuration.java:834)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse
(XML11Configuration.java:764)
at
com.sun.org.apache.xerces.internal.parsers.XMLParser.parse
(XMLParser.java:148)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse
(AbstractSAXParser.java:1242)
at org.apache.commons.digester.Digester.parse
(Digester.java:1685)
...
"Thread-3" prio=1 tid=0x0000002b2509d360 nid=0x34f3 runnable
[0x0000000041162000..0x0000000041162c30]
at java.lang.String.equals(String.java:858)
at org.apache.commons.beanutils.MethodUtils
$MethodDescriptor.equals(MethodUtils.java:833)
at java.util.WeakHashMap.eq(WeakHashMap.java:254)
at java.util.WeakHashMap.get(WeakHashMap.java:345)
at
org.apache.commons.beanutils.MethodUtils.getMatchingAccessibleMethod(
MethodUtils.java:530)
at org.apache.commons.beanutils.MethodUtils.invokeMethod
(MethodUtils.java:209)
at org.apache.commons.digester.CallMethodRule.end
(CallMethodRule.java:625)
at org.apache.commons.digester.Rule.end(Rule.java:230)
at org.apache.commons.digester.Digester.endElement
(Digester.java:1130)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endEleme
nt(AbstractSAXParser.java:633)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImp
l.scanEndElement(XMLDocumentFragmentScannerImpl.java:1241)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImp
l$FragmentContentDispatcher.dispatch
(XMLDocumentFragmentScannerImpl.java:1685)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImp
l.scanDocument(XMLDocumentFragmentScannerImpl.java:368)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse
(XML11Configuration.java:834)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse
(XML11Configuration.java:764)
at
com.sun.org.apache.xerces.internal.parsers.XMLParser.parse
(XMLParser.java:148)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse
(AbstractSAXParser.java:1242)
at org.apache.commons.digester.Digester.parse
(Digester.java:1685)
...
"Thread-2" prio=1 tid=0x0000002b25083e00 nid=0x34f2 runnable
[0x0000000041061000..0x0000000041061bb0]
at java.util.WeakHashMap.expungeStaleEntries
(WeakHashMap.java:289)
at java.util.WeakHashMap.getTable(WeakHashMap.java:297)
at java.util.WeakHashMap.get(WeakHashMap.java:341)
at
org.apache.commons.beanutils.MethodUtils.getMatchingAccessibleMethod(
MethodUtils.java:530)
at org.apache.commons.beanutils.MethodUtils.invokeMethod
(MethodUtils.java:209)
at org.apache.commons.digester.CallMethodRule.end
(CallMethodRule.java:625)
at org.apache.commons.digester.Rule.end(Rule.java:230)
at org.apache.commons.digester.Digester.endElement
(Digester.java:1130)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endEleme
nt(AbstractSAXParser.java:633)
at
com.sun.org.apache.xerces.internal.parsers.AbstractXMLDocumentParser.
emptyElement(AbstractXMLDocumentParser.java:221)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImp
l.scanStartElement(XMLDocumentFragmentScannerImpl.java:872)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImp
l$FragmentContentDispatcher.dispatch
(XMLDocumentFragmentScannerImpl.java:1693)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImp
l.scanDocument(XMLDocumentFragmentScannerImpl.java:368)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse
(XML11Configuration.java:834)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse
(XML11Configuration.java:764)
at
com.sun.org.apache.xerces.internal.parsers.XMLParser.parse
(XMLParser.java:148)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse
(AbstractSAXParser.java:1242)
at org.apache.commons.digester.Digester.parse
(Digester.java:1685)
...
"Thread-1" prio=1 tid=0x0000002b2509a4a0 nid=0x34f1 runnable
[0x0000000040f60000..0x0000000040f60b30]
at java.util.WeakHashMap.expungeStaleEntries
(WeakHashMap.java:289)
at java.util.WeakHashMap.getTable(WeakHashMap.java:297)
at java.util.WeakHashMap.get(WeakHashMap.java:341)
at
org.apache.commons.beanutils.MethodUtils.getMatchingAccessibleMethod(
MethodUtils.java:530)
at org.apache.commons.beanutils.MethodUtils.invokeMethod
(MethodUtils.java:209)
at org.apache.commons.digester.CallMethodRule.end
(CallMethodRule.java:625)
at org.apache.commons.digester.Rule.end(Rule.java:230)
at org.apache.commons.digester.Digester.endElement
(Digester.java:1130)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endEleme
nt(AbstractSAXParser.java:633)
at
com.sun.org.apache.xerces.internal.parsers.AbstractXMLDocumentParser.
emptyElement(AbstractXMLDocumentParser.java:221)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImp
l.scanStartElement(XMLDocumentFragmentScannerImpl.java:872)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImp
l$FragmentContentDispatcher.dispatch
(XMLDocumentFragmentScannerImpl.java:1693)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImp
l.scanDocument(XMLDocumentFragmentScannerImpl.java:368)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse
(XML11Configuration.java:834)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse
(XML11Configuration.java:764)
at
com.sun.org.apache.xerces.internal.parsers.XMLParser.parse
(XMLParser.java:148)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse
(AbstractSAXParser.java:1242)
at org.apache.commons.digester.Digester.parse
(Digester.java:1685)
...
"Low Memory Detector" daemon prio=1 tid=0x0000002b25002430
nid=0x34ef runnable [0x0000000000000000..0x0000000000000000]
"CompilerThread1" daemon prio=1 tid=0x0000002b250009d0 nid=0x34ee
waiting on condition [0x0000000000000000..0x0000000040c5c6d0]
"CompilerThread0" daemon prio=1 tid=0x0000002b220c2ce0 nid=0x34ed
waiting on condition [0x0000000000000000..0x0000000040b5b650]
"AdapterThread" daemon prio=1 tid=0x0000002b220c1750 nid=0x34ec
waiting on condition [0x0000000000000000..0x0000000000000000]
"Signal Dispatcher" daemon prio=1 tid=0x0000002b220c02d0
nid=0x34eb runnable [0x0000000000000000..0x0000000000000000]
"Finalizer" daemon prio=1 tid=0x0000002b220ae1e0 nid=0x34ea in
Object.wait() [0x0000000040859000..0x0000000040859bb0]
at java.lang.Object.wait(Native Method)
- waiting on <0x0000002b0a8d7408> (a
java.lang.ref.ReferenceQueue$Lock)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:
120)
- locked <0x0000002b0a8d7408> (a
java.lang.ref.ReferenceQueue$Lock)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:
136)
at java.lang.ref.Finalizer$FinalizerThread.run
(Finalizer.java:159)
"Reference Handler" daemon prio=1 tid=0x0000002b220ab980
nid=0x34e9 in Object.wait() [0x0000000040758000..0x0000000040758b30]
at java.lang.Object.wait(Native Method)
- waiting on <0x0000002b0a7da3b0> (a
java.lang.ref.Reference$Lock)
at java.lang.Object.wait(Object.java:474)
at java.lang.ref.Reference$ReferenceHandler.run
(Reference.java:116)
- locked <0x0000002b0a7da3b0> (a java.lang.ref.Reference
$Lock)
"main" prio=1 tid=0x0000000040115ea0 nid=0x34e3 waiting on
condition [0x0000007fbfffc000..0x0000007fbfffd280]
at java.lang.Thread.sleep(Native Method)
...
"VM Thread" prio=1 tid=0x0000002b220a7480 nid=0x34e8 runnable
"GC task thread#0 (ParallelGC)" prio=1 tid=0x0000000040133fe0
nid=0x34e4 runnable
"GC task thread#1 (ParallelGC)" prio=1 tid=0x0000000040135630
nid=0x34e5 runnable
"GC task thread#2 (ParallelGC)" prio=1 tid=0x0000000040136480
nid=0x34e6 runnable
"GC task thread#3 (ParallelGC)" prio=1 tid=0x0000000040137300
nid=0x34e7 runnable
"VM Periodic Task Thread" prio=1 tid=0x0000002b25004e10 nid=0x34f0
waiting on condition
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postedSep 11, '08 at 6:42a
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