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Hudson commented on HBASE-21800: -------------------------------- Results for branch branch-1.4 [build #709 on builds.a.o|https://builds.apache.org/job/HBase%20Nightly/job/branch-1.4/709/]: (x) *{color:red}-1 overall{color}* ---- details (if available): (x) {color:red}-1 general checks{color} -- For more information [see general report|https://builds.apache.org/job/HBase%20Nightly/job/branch-1.4/709//General_Nightly_Build_Report/] (x) {color:red}-1 jdk7 checks{color} -- For more information [see jdk7 report|https://builds.apache.org/job/HBase%20Nightly/job/branch-1.4/709//JDK7_Nightly_Build_Report/] (x) {color:red}-1 jdk8 hadoop2 checks{color} -- For more information [see jdk8 (hadoop2) report|https://builds.apache.org/job/HBase%20Nightly/job/branch-1.4/709//JDK8_Nightly_Build_Report_(Hadoop2)/] (/) {color:green}+1 source release artifact{color} -- See build output for details. > RegionServer aborted due to NPE from MetaTableMetrics coprocessor > ----------------------------------------------------------------- > > Key: HBASE-21800 > URL: https://issues.apache.org/jira/browse/HBASE-21800 > Project: HBase > Issue Type: Bug > Components: Coprocessors, meta, metrics, Operability > Reporter: Sakthi > Assignee: Sakthi > Priority: Critical > Labels: Meta > Fix For: 3.0.0, 2.1, 2.2, 1.4, 1.5 > > Attachments: hbase-21800.branch-1.001.patch, > hbase-21800.branch-1.002.patch, hbase-21800.branch-1.003.patch, > hbase-21800.branch-1.004.patch, hbase-21800.master.001.patch, > hbase-21800.master.002.patch, hbase-21800.master.003.patch > > > I was just playing around the code, trying to capture "Top k" table metrics > from MetaMetrics, when I bumped into this issue. Though currently we are not > capturing "Top K" table metrics, but we can encounter this issue because of > the "Top k Clients" that is implemented using the LossyAlgo. > > RegionServer gets aborted due to a NPE from MetaTableMetrics coprocessor. The > log looks somewhat like this: > {code:java} > 2019-01-28 23:31:10,311 ERROR > [RpcServer.priority.FPBQ.Fifo.handler=19,queue=1,port=16020] > coprocessor.CoprocessorHost: The coprocessor > org.apache.hadoop.hbase.coprocessor.MetaTableMetrics threw > java.lang.NullPointerException > java.lang.NullPointerException > at > org.apache.hadoop.hbase.coprocessor.MetaTableMetrics$ExampleRegionObserverMeta.markMeterIfPresent(MetaTableMetrics.java:123) > at > org.apache.hadoop.hbase.coprocessor.MetaTableMetrics$ExampleRegionObserverMeta.tableMetricRegisterAndMark2(MetaTableMetrics.java:233) > at > org.apache.hadoop.hbase.coprocessor.MetaTableMetrics$ExampleRegionObserverMeta.preGetOp(MetaTableMetrics.java:82) > at > org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost$19.call(RegionCoprocessorHost.java:840) > at > org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost$19.call(RegionCoprocessorHost.java:837) > at > org.apache.hadoop.hbase.coprocessor.CoprocessorHost$ObserverOperationWithoutResult.callObserver(CoprocessorHost.java:551) > at > org.apache.hadoop.hbase.coprocessor.CoprocessorHost.execOperation(CoprocessorHost.java:625) > at > org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost.preGet(RegionCoprocessorHost.java:837) > at > org.apache.hadoop.hbase.regionserver.RSRpcServices.get(RSRpcServices.java:2608) > at > org.apache.hadoop.hbase.regionserver.RSRpcServices.get(RSRpcServices.java:2547) > at > org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos$ClientService$2.callBlockingMethod(ClientProtos.java:41998) > at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:413) > at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:130) > at > org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:324) > at > org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:304) > 2019-01-28 23:31:10,314 ERROR > [RpcServer.priority.FPBQ.Fifo.handler=19,queue=1,port=16020] > regionserver.HRegionServer: ***** ABORTING region server > 10.0.0.24,16020,1548747043814: The coprocessor > org.apache.hadoop.hbase.coprocessor.MetaTableMetrics threw > java.lang.NullPointerException ***** > java.lang.NullPointerException > at > org.apache.hadoop.hbase.coprocessor.MetaTableMetrics$ExampleRegionObserverMeta.markMeterIfPresent(MetaTableMetrics.java:123) > at > org.apache.hadoop.hbase.coprocessor.MetaTableMetrics$ExampleRegionObserverMeta.tableMetricRegisterAndMark2(MetaTableMetrics.java:233) > at > org.apache.hadoop.hbase.coprocessor.MetaTableMetrics$ExampleRegionObserverMeta.preGetOp(MetaTableMetrics.java:82) > at > org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost$19.call(RegionCoprocessorHost.java:840) > at > org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost$19.call(RegionCoprocessorHost.java:837) > at > org.apache.hadoop.hbase.coprocessor.CoprocessorHost$ObserverOperationWithoutResult.callObserver(CoprocessorHost.java:551) > at > org.apache.hadoop.hbase.coprocessor.CoprocessorHost.execOperation(CoprocessorHost.java:625) > at > org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost.preGet(RegionCoprocessorHost.java:837) > at > org.apache.hadoop.hbase.regionserver.RSRpcServices.get(RSRpcServices.java:2608) > at > org.apache.hadoop.hbase.regionserver.RSRpcServices.get(RSRpcServices.java:2547) > at > org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos$ClientService$2.callBlockingMethod(ClientProtos.java:41998) > at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:413) > at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:130) > at > org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:324) > at > org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:304) > {code} -- This message was sent by Atlassian JIRA (v7.6.3#76005)