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https://issues.apache.org/jira/browse/HBASE-27390?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Bryan Beaudreault updated HBASE-27390:
--------------------------------------
Resolution: Fixed
Status: Resolved (was: Patch Available)
Pushed to master, branch-2, and branch-2.5.
branch-2.4 had some conflicts, so I did not push there. We can try to create a
backport if the need arises.
> getClusterMetrics NullPointerException when ServerTask status null
> ------------------------------------------------------------------
>
> Key: HBASE-27390
> URL: https://issues.apache.org/jira/browse/HBASE-27390
> Project: HBase
> Issue Type: Bug
> Reporter: Bryan Beaudreault
> Assignee: Briana Augenreich
> Priority: Major
> Fix For: 2.6.0, 3.0.0-alpha-4, 2.5.3
>
>
> We had a situation where an hmaster had just started up and something started
> calling Admin.getClusterMetrics. It seems there were ServerTasks in memory,
> but at least one had no status. This resulted in a spam of NPE:
> {code:java}
> [RpcServer.default.FPBQ.Fifo.handler=29,queue=2,port=60000] ERROR
> org.apache.hadoop.hbase.ipc.RpcServer: Unexpected throwable object
> java.lang.NullPointerException
> at
> org.apache.hadoop.hbase.shaded.protobuf.generated.ClusterStatusProtos$ServerTask$Builder.setStatus(ClusterStatusProtos.java:14352)
>
> at
> org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil.toServerTask(ProtobufUtil.java:3565)
>
> at
> org.apache.hadoop.hbase.ClusterMetricsBuilder.lambda$toClusterStatus$4(ClusterMetricsBuilder.java:80)
>
> at
> java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
>
> at
> java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1655)
>
> at
> java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
>
> at
> java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
>
> at
> java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:913)
>
> at
> java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
>
> at
> java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:578)
>
> at
> org.apache.hadoop.hbase.ClusterMetricsBuilder.toClusterStatus(ClusterMetricsBuilder.java:80)
>
> at
> org.apache.hadoop.hbase.master.MasterRpcServices.getClusterStatus(MasterRpcServices.java:980)
>
> at
> org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProtos$MasterService$2.callBlockingMethod(MasterProtos.java)
>
> at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:385)
> at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:124)
> at org.apache.hadoop.hbase.ipc.RpcHandler.run(RpcHandler.java:102)
> at org.apache.hadoop.hbase.ipc.RpcHandler.run(RpcHandler.java:82) {code}
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