Uploaded image for project: 'Hadoop Common'
  1. Hadoop Common
  2. HADOOP-15121

Encounter NullPointerException when using DecayRpcScheduler

    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 2.8.2
    • Fix Version/s: 3.1.0, 2.10.0, 3.0.1, 2.9.2, 2.8.5
    • Component/s: None
    • Labels:
      None
    • Target Version/s:

      Description

      I set ipc.8020.scheduler.impl to org.apache.hadoop.ipc.DecayRpcScheduler, but got excetion in namenode:

      2017-12-15 15:26:34,662 ERROR impl.MetricsSourceAdapter (MetricsSourceAdapter.java:getMetrics(202)) - Error getting metrics from source DecayRpcSchedulerMetrics2.ipc.8020
      java.lang.NullPointerException
              at org.apache.hadoop.ipc.DecayRpcScheduler$MetricsProxy.getMetrics(DecayRpcScheduler.java:781)
              at org.apache.hadoop.metrics2.impl.MetricsSourceAdapter.getMetrics(MetricsSourceAdapter.java:199)
              at org.apache.hadoop.metrics2.impl.MetricsSourceAdapter.updateJmxCache(MetricsSourceAdapter.java:182)
              at org.apache.hadoop.metrics2.impl.MetricsSourceAdapter.getMBeanInfo(MetricsSourceAdapter.java:155)
              at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.getNewMBeanClassName(DefaultMBeanServerInterceptor.java:333)
              at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerMBean(DefaultMBeanServerInterceptor.java:319)
              at com.sun.jmx.mbeanserver.JmxMBeanServer.registerMBean(JmxMBeanServer.java:522)
              at org.apache.hadoop.metrics2.util.MBeans.register(MBeans.java:66)
              at org.apache.hadoop.metrics2.impl.MetricsSourceAdapter.startMBeans(MetricsSourceAdapter.java:222)
              at org.apache.hadoop.metrics2.impl.MetricsSourceAdapter.start(MetricsSourceAdapter.java:100)
              at org.apache.hadoop.metrics2.impl.MetricsSystemImpl.registerSource(MetricsSystemImpl.java:268)
              at org.apache.hadoop.metrics2.impl.MetricsSystemImpl.register(MetricsSystemImpl.java:233)
              at org.apache.hadoop.ipc.DecayRpcScheduler$MetricsProxy.registerMetrics2Source(DecayRpcScheduler.java:709)
              at org.apache.hadoop.ipc.DecayRpcScheduler$MetricsProxy.<init>(DecayRpcScheduler.java:685)
              at org.apache.hadoop.ipc.DecayRpcScheduler$MetricsProxy.getInstance(DecayRpcScheduler.java:693)
              at org.apache.hadoop.ipc.DecayRpcScheduler.<init>(DecayRpcScheduler.java:236)
              at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
              at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
              at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
              at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
              at org.apache.hadoop.ipc.CallQueueManager.createScheduler(CallQueueManager.java:102)
              at org.apache.hadoop.ipc.CallQueueManager.<init>(CallQueueManager.java:76)
              at org.apache.hadoop.ipc.Server.<init>(Server.java:2612)
              at org.apache.hadoop.ipc.RPC$Server.<init>(RPC.java:958)
              at org.apache.hadoop.ipc.ProtobufRpcEngine$Server.<init>(ProtobufRpcEngine.java:374)
              at org.apache.hadoop.ipc.ProtobufRpcEngine.getServer(ProtobufRpcEngine.java:349)
              at org.apache.hadoop.ipc.RPC$Builder.build(RPC.java:800)
      at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.<init>(NameNodeRpcServer.java:415)
              at org.apache.hadoop.hdfs.server.namenode.NameNode.createRpcServer(NameNode.java:755)
              at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:697)
              at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:905)
              at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:884)
              at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1610)
              at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1678)
      

      It seems that metricsProxy in DecayRpcScheduler should initiate its delegate field in its Initialization method

        Attachments

        1. HADOOP-15121.001.patch
          2 kB
          Tao Jie
        2. HADOOP-15121.002.patch
          5 kB
          Tao Jie
        3. HADOOP-15121.003.patch
          4 kB
          Tao Jie
        4. HADOOP-15121.004.patch
          4 kB
          Tao Jie
        5. HADOOP-15121.005.patch
          4 kB
          Tao Jie
        6. HADOOP-15121.006.patch
          4 kB
          Tao Jie
        7. HADOOP-15121.007.patch
          4 kB
          Tao Jie
        8. HADOOP-15121.008.patch
          4 kB
          Tao Jie

          Issue Links

            Activity

              People

              • Assignee:
                Tao Jie Tao Jie
                Reporter:
                Tao Jie Tao Jie
              • Votes:
                0 Vote for this issue
                Watchers:
                7 Start watching this issue

                Dates

                • Created:
                  Updated:
                  Resolved: