[jira] [Created] (HBASE-27390) getClusterMetrics NullPointerException when ServerTask status null

["Bryan Beaudreault (Jira)" <ji...@apache.org>]

Bryan Beaudreault created HBASE-27390:
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             Summary: 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


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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