[HBASE-18888] StealJobQueue should call super() to init the PriorityBlockingQueue

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.0-alpha-3
• Fix Version/s: 2.0.0-alpha-4, 2.0.0
• Hadoop Flags: Reviewed
• Assignee: ramkrishna.s.vasudevan
• Reporter: ramkrishna.s.vasudevan
• Created: 27/Sep/17 05:45
• Updated: 01/Aug/18 06:22
• Resolved: 28/Sep/17 05:11

Description

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)

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.