FAQ
Hi,



when I update my hbase from 0.20.6 to 0.90, some error occur:

Below is logs on 167.6.5.13, because Meta table is served by this server, so
other regionservers want to connect this server to getRegionInfo, but got
some error:



2011-01-28 17:14:18,291 WARN org.apache.hadoop.ipc.HBaseServer: IPC Server
Responder, call getRegionInfo([B@15e43aec) from 167.6.5.11:34887: output
error

2011-01-28 17:14:18,291 WARN org.apache.hadoop.ipc.HBaseServer: IPC Server
Responder, call getRegionInfo([B@3ad8672e) from 167.6.5.14:50735: output
error



This caused the server on 11 and 14 socket timeout and shutdown:



2011-01-28 17:13:47,633 FATAL
org.apache.hadoop.hbase.regionserver.HRegionServer: ABORTING region server
serverName=c3s5.site,60020,1296203449919, load=(requests=0, regions=2710,
usedHeap=4622, maxHeap=8165): Failed open of daughter
ufdr_c,201101268613812388592#085317,1296205930314.cd36b19931bd2b2adcca176a88
dbd6e5.

java.net.SocketTimeoutException: Call to c3s4.site/167.6.5.13:60020 failed
on socket timeout exception: java.net.SocketTimeoutException: 60000 millis
timeout while waiting for channel to be ready for read. ch :
java.nio.channels.SocketChannel[connected local=/167.6.5.14:50735
remote=c3s4.site/167.6.5.13:60020]

2011-01-28 17:13:47,634 INFO
org.apache.hadoop.hbase.regionserver.HRegionServer: STOPPED: Failed open of
daughter



Now, my question is what's the cause of "output error" ?



Before the "output error" warning, there is an EOFException, is there any
relationship with this error?



2011-01-28 17:13:43,413 WARN org.apache.hadoop.ipc.HBaseServer: IPC Server
listener on 60020: readAndProcess threw exception java.io.EOFException.
Count of bytes read: 0

java.io.EOFException

at java.io.DataInputStream.readFully(DataInputStream.java:180)

at java.io.DataInputStream.readUTF(DataInputStream.java:592)

at java.io.DataInputStream.readUTF(DataInputStream.java:547)

at
org.apache.hadoop.hbase.ipc.HBaseRPC$Invocation.readFields(HBaseRPC.java:122
)

at
org.apache.hadoop.hbase.ipc.HBaseServer$Connection.processData(HBaseServer.j
ava:975)

at
org.apache.hadoop.hbase.ipc.HBaseServer$Connection.readAndProcess(HBaseServe
r.java:943)

at
org.apache.hadoop.hbase.ipc.HBaseServer$Listener.doRead(HBaseServer.java:519
)

at
org.apache.hadoop.hbase.ipc.HBaseServer$Listener$Reader.run(HBaseServer.java
:313)

at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.ja
va:886)

at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:9
08)

at java.lang.Thread.run(Thread.java:662)

2011-01-28 17:13:43,413 INFO
org.apache.hadoop.hbase.regionserver.HRegionServer: Received request to open
region: ufdr_c,201101258613814756901#232839,1295985296267.2025697489

2011-01-28 17:13:43,418 DEBUG org.apache.hadoop.hbase.zookeeper.ZKUtil:
regionserver:60020-0x22dcbbf01b40006 Retrieved 92 byte(s) of data from znode
/hbase/unassigned/1489005343;
data=region=ufdr_c,201101258613813763326#174006,1295973611272,
server=c3s4.site,60020,1296203450194, state=RS_ZK_REGION_OPENING

2011-01-28 17:13:43,420 DEBUG org.apache.hadoop.hbase.zookeeper.ZKUtil:
regionserver:60020-0x22dcbbf01b40006 Retrieved 92 byte(s) of data from znode
/hbase/unassigned/1497320702;
data=region=ufdr_c,201101268613810041680#085457,1296052066413,
server=c3s4.site,60020,1296203450194, state=RS_ZK_REGION_OPENING

2011-01-28 17:13:43,441 DEBUG
org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher:
regionserver:60020-0x22dcbbf01b40006 Received ZooKeeper Event,
type=NodeDataChanged, state=SyncConnected, path=/hbase/unassigned/1489005343

2011-01-28 17:13:43,441 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign:
regionserver:60020-0x22dcbbf01b40006 Successfully transitioned node
1489005343 from RS_ZK_REGION_OPENING to RS_ZK_REGION_OPENING







Zhou Shuaifeng(Frank)
HUAWEI TECHNOLOGIES CO.,LTD. huawei_logo



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postedJan 31, '11 at 9:44a
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