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https://issues.apache.org/jira/browse/HBASE-13653?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14536110#comment-14536110
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zhangduo commented on HBASE-13653:
----------------------------------
There maybe a race condition between calling reportForDuty and
handleReportForDutyResponse.
But there are lots of things which are not initialized if
handleReportForDutyResponse is not finished, not only walFactory. So I'm not
sure if the fix in this patch is enough.
> Uninitialized HRegionServer#walFactory may result in NullPointerException at
> region server startup
> ---------------------------------------------------------------------------------------------------
>
> Key: HBASE-13653
> URL: https://issues.apache.org/jira/browse/HBASE-13653
> Project: HBase
> Issue Type: Bug
> Components: hbase
> Reporter: Romil Choksi
> Assignee: Ted Yu
> Attachments: 13653-branch-1.txt
>
>
> hbase --config /tmp/hbaseConf org.apache.hadoop.hbase.IntegrationTestIngest
> --monkey unbalance
> causes NPE
> {code}
> 2015-05-08 08:44:20,885 ERROR
> [B.defaultRpcServer.handler=28,queue=1,port=16000] master.ServerManager:
> Received exception in RPC for warmup
> server:RegionServer1,16020,1431074656202region: {ENCODED =>
> 40133c823b6d9d9dece99db1aad62730, NAME =>
> 'SYSTEM.SEQUENCE,2\x00\x00\x00,1431070054641.40133c823b6d9d9dece99db1aad62730.',
> STARTKEY => '2\x00\x00\x00', ENDKEY => '3\x00\x00\x00'}exception:
> java.io.IOException: java.io.IOException
> at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:2154)
> at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:101)
> at
> org.apache.hadoop.hbase.ipc.RpcExecutor.consumerLoop(RpcExecutor.java:130)
> at org.apache.hadoop.hbase.ipc.RpcExecutor$1.run(RpcExecutor.java:107)
> at java.lang.Thread.run(Thread.java:745)
> Caused by: java.lang.NullPointerException
> at
> org.apache.hadoop.hbase.regionserver.HRegionServer.getWAL(HRegionServer.java:1825)
> at
> org.apache.hadoop.hbase.regionserver.RSRpcServices.warmupRegion(RSRpcServices.java:1559)
> at
> org.apache.hadoop.hbase.protobuf.generated.AdminProtos$AdminService$2.callBlockingMethod(AdminProtos.java:21997)
> at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:2112)
> ... 4 more
> {code}
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