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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