[jira] [Created] (HDFS-5528) NPE in instantiating MiniDFSCluster

["Junping Du (JIRA)" <ji...@apache.org>]

Junping Du created HDFS-5528:
--------------------------------

             Summary: NPE in instantiating MiniDFSCluster
                 Key: HDFS-5528
                 URL: https://issues.apache.org/jira/browse/HDFS-5528
             Project: Hadoop HDFS
          Issue Type: Bug
    Affects Versions: 3.0.0
            Reporter: Junping Du


In running some tests, i.e. TestUnderReplicatedBlocks, the test can pass successfully, but some NPE exception is thrown out in RPC server side, like following:

2013-11-15 01:59:16,553 ERROR lib.MethodMetric (MethodMetric.java:snapshot(116)) - Error invoking method numOpenConnections
java.lang.reflect.InvocationTargetException
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.apache.hadoop.metrics2.lib.MethodMetric$2.snapshot(MethodMetric.java:110)
	at org.apache.hadoop.metrics2.lib.MethodMetric.snapshot(MethodMetric.java:141)
	at org.apache.hadoop.metrics2.lib.MetricsRegistry.snapshot(MetricsRegistry.java:387)
	at org.apache.hadoop.metrics2.lib.MetricsSourceBuilder$1.getMetrics(MetricsSourceBuilder.java:88)
	at org.apache.hadoop.metrics2.impl.MetricsSourceAdapter.getMetrics(MetricsSourceAdapter.java:194)
	at org.apache.hadoop.metrics2.impl.MetricsSourceAdapter.updateJmxCache(MetricsSourceAdapter.java:171)
	at org.apache.hadoop.metrics2.impl.MetricsSourceAdapter.getMBeanInfo(MetricsSourceAdapter.java:150)
	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.getNewMBeanClassName(DefaultMBeanServerInterceptor.java:321)
	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerMBean(DefaultMBeanServerInterceptor.java:307)
	at com.sun.jmx.mbeanserver.JmxMBeanServer.registerMBean(JmxMBeanServer.java:482)
	at org.apache.hadoop.metrics2.util.MBeans.register(MBeans.java:58)
	at org.apache.hadoop.metrics2.impl.MetricsSourceAdapter.startMBeans(MetricsSourceAdapter.java:219)
	at org.apache.hadoop.metrics2.impl.MetricsSourceAdapter.start(MetricsSourceAdapter.java:95)
	at org.apache.hadoop.metrics2.impl.MetricsSystemImpl.registerSource(MetricsSystemImpl.java:242)
	at org.apache.hadoop.metrics2.impl.MetricsSystemImpl.register(MetricsSystemImpl.java:222)
	at org.apache.hadoop.ipc.metrics.RpcMetrics.create(RpcMetrics.java:57)
	at org.apache.hadoop.ipc.Server.<init>(Server.java:2112)
	at org.apache.hadoop.ipc.RPC$Server.<init>(RPC.java:901)
	at org.apache.hadoop.ipc.ProtobufRpcEngine$Server.<init>(ProtobufRpcEngine.java:505)
	at org.apache.hadoop.ipc.ProtobufRpcEngine.getServer(ProtobufRpcEngine.java:480)
	at org.apache.hadoop.ipc.RPC$Builder.build(RPC.java:746)
	at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.<init>(NameNodeRpcServer.java:279)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.createRpcServer(NameNode.java:512)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:492)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:688)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:673)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1267)
	at org.apache.hadoop.hdfs.MiniDFSCluster.createNameNode(MiniDFSCluster.java:900)
	at org.apache.hadoop.hdfs.MiniDFSCluster.createNameNodesAndSetConf(MiniDFSCluster.java:791)
	at org.apache.hadoop.hdfs.MiniDFSCluster.initMiniDFSCluster(MiniDFSCluster.java:649)
	at org.apache.hadoop.hdfs.MiniDFSCluster.<init>(MiniDFSCluster.java:339)
	at org.apache.hadoop.hdfs.MiniDFSCluster$Builder.build(MiniDFSCluster.java:320)
	at org.apache.hadoop.hdfs.server.blockmanagement.TestUnderReplicatedBlocks.testSetrepIncWithUnderReplicatedBlocks(TestUnderReplicatedBlocks.java:40)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
	at org.junit.internal.runners.statements.FailOnTimeout$StatementThread.run(FailOnTimeout.java:62)
Caused by: java.lang.NullPointerException
	at org.apache.hadoop.ipc.Server.getNumOpenConnections(Server.java:2434)
	at org.apache.hadoop.ipc.metrics.RpcMetrics.numOpenConnections(RpcMetrics.java:74)
	... 46 more



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