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 -- This message was sent by Atlassian JIRA (v6.1#6144)