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https://issues.apache.org/jira/browse/HBASE-1858?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12907260#action_12907260
]
George P. Stathis commented on HBASE-1858:
------------------------------------------
Folks, unless there is something special that needs to be done when configuring
transactional tables, it unfortunately seems that this problem is still
occurring in 0.20.3:
{noformat}
2010-08-27 15:53:06,030 DEBUG regionserver.HLog - Splitting hlog 2 of 31:
hdfs://domU-12-31-39-18-19-65.compute-1.internal:9000/hbase/.logs/domU-12-31-39-18-15-24.compute-1.internal,60020,1282782970585/
hlog.dat.1282798940318, length=9831249
2010-08-27 15:53:06,033 DEBUG regionserver.HLog - IOE Pushed=0 entries from
hdfs://domU-12-31-39-18-19-65.compute-1.internal:9000/hbase/.logs/domU-12-31-39-18-15-24.compute-1.internal,60020,128278297058
5/hlog.dat.1282798940318
2010-08-27 15:53:06,033 WARN regionserver.HLog - Exception processing
hdfs://domU-12-31-39-18-19-65.compute-1.internal:9000/hbase/.logs/domU-12-31-39-18-15-24.compute-1.internal,60020,1282782970585/hlo
g.dat.1282798940318 -- continuing. Possible DATA LOSS!
java.io.IOException: wrong key class:
org.apache.hadoop.hbase.regionserver.HLogKey is not class
org.apache.hadoop.hbase.regionserver.transactional.THLogKey
at org.apache.hadoop.io.SequenceFile$Reader.next(SequenceFile.java:1824)
at org.apache.hadoop.io.SequenceFile$Reader.next(SequenceFile.java:1876)
at org.apache.hadoop.hbase.regionserver.HLog.splitLog(HLog.java:966)
at org.apache.hadoop.hbase.regionserver.HLog.splitLog(HLog.java:872)
at
org.apache.hadoop.hbase.master.ProcessServerShutdown.process(ProcessServerShutdown.java:286)
at
org.apache.hadoop.hbase.master.HMaster.processToDoQueue(HMaster.java:494)
at org.apache.hadoop.hbase.master.HMaster.run(HMaster.java:429)
{noformat}
I'm not sure though that the "define the HLogKey class in the conf" part means,
so I might be missing that...
> Master can't split logs created by THBase
> -----------------------------------------
>
> Key: HBASE-1858
> URL: https://issues.apache.org/jira/browse/HBASE-1858
> Project: HBase
> Issue Type: Bug
> Components: master
> Affects Versions: 0.20.0
> Reporter: Clint Morgan
> Assignee: Clint Morgan
> Fix For: 0.20.1, 0.90.0
>
> Attachments: 1858-v2.patch, 1858.patch
>
>
> When master tries to split logs created by THbase, it fails because it tries
> to read in the wrong key type. (THBase subclasses HLogKey to add fields to
> the key).
> 2009-09-16 09:03:01,943 WARN org.apache.hadoop.hbase.regionserver.HLog:
> Exception processing
> hdfs://domU-12-31-39-07-CC-A2.compute-1.internal:9000/hbase/.logs/domU-12-31-39-07-CC-A2.compute-1.internal,60020,1253103101743/hlog.dat.1253103102168
> -- continuing. Possible DATA LOSS!
> java.io.IOException: wrong key class:
> org.apache.hadoop.hbase.regionserver.HLogKey is not class
> org.apache.hadoop.hbase.regionserver.transactional.THLogKey
> at
> org.apache.hadoop.io.SequenceFile$Reader.next(SequenceFile.java:1824)
> at
> org.apache.hadoop.io.SequenceFile$Reader.next(SequenceFile.java:1876)
> at org.apache.hadoop.hbase.regionserver.HLog.splitLog(HLog.java:880)
> at org.apache.hadoop.hbase.regionserver.HLog.splitLog(HLog.java:802)
> at
> org.apache.hadoop.hbase.master.ProcessServerShutdown.process(ProcessServerShutdown.java:274)
> at
> org.apache.hadoop.hbase.master.HMaster.processToDoQueue(HMaster.java:492)
> at org.apache.hadoop.hbase.master.HMaster.run(HMaster.java:426)
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