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https://issues.apache.org/jira/browse/HBASE-18888?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16182269#comment-16182269
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Anoop Sam John commented on HBASE-18888:
----------------------------------------
+1
> StealJobQueue should call super() to init the PriorityBlockingQueue
> -------------------------------------------------------------------
>
> Key: HBASE-18888
> URL: https://issues.apache.org/jira/browse/HBASE-18888
> Project: HBase
> Issue Type: Bug
> Affects Versions: 2.0.0-alpha-3
> Reporter: ramkrishna.s.vasudevan
> Assignee: ramkrishna.s.vasudevan
> Fix For: 2.0.0-alpha-4
>
> Attachments: HBASE-18888.patch
>
>
> {code}
> ERROR: java.io.IOException:
> org.apache.hadoop.hbase.regionserver.CompactSplit$CompactionRunner cannot be
> cast to java.lang.Comparable
> at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:465)
> at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:133)
> at
> org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:278)
> at
> org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:258)
> Caused by: java.lang.ClassCastException:
> org.apache.hadoop.hbase.regionserver.CompactSplit$CompactionRunner cannot be
> cast to java.lang.Comparable
> at
> java.util.concurrent.PriorityBlockingQueue.siftUpComparable(PriorityBlockingQueue.java:357)
> at
> java.util.concurrent.PriorityBlockingQueue.offer(PriorityBlockingQueue.java:489)
> at
> org.apache.hadoop.hbase.util.StealJobQueue.offer(StealJobQueue.java:103)
> at
> java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:1361)
> at
> org.apache.hadoop.hbase.regionserver.CompactSplit.requestCompactionInternal(CompactSplit.java:291)
> at
> org.apache.hadoop.hbase.regionserver.CompactSplit.requestCompactionInternal(CompactSplit.java:248)
> at
> org.apache.hadoop.hbase.regionserver.CompactSplit.requestCompaction(CompactSplit.java:236)
> at
> org.apache.hadoop.hbase.regionserver.RSRpcServices.compactRegion(RSRpcServices.java:1591)
> at
> org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos$AdminService$2.callBlockingMethod(AdminProtos.java:26856)
> at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:406)
> {code}
> Seems to be a simple miss. StealJobQueue does not init the
> PriorityBlockingQueue that it extends and so major compaction/compaction just
> fails with the above stack trace.
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