Wei-Chiu Chuang created HDFS-11041: -------------------------------------- Summary: Unable to unregister FsDatasetState MBean if if DataNode is shutdown twice Key: HDFS-11041 URL: https://issues.apache.org/jira/browse/HDFS-11041 Project: Hadoop HDFS Issue Type: Bug Components: datanode Reporter: Wei-Chiu Chuang Priority: Trivial
I saw error message like the following in some tests {noformat} 2016-10-21 04:09:03,900 [main] WARN util.MBeans (MBeans.java:unregister(114)) - Error unregistering Hadoop:service=DataNode,name=FSDatasetState-33cd714c-0b1a-471f-8efe-f431d7d874bc javax.management.InstanceNotFoundException: Hadoop:service=DataNode,name=FSDatasetState-33cd714c-0b1a-471f-8efe-f431d7d874bc at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.getMBean(DefaultMBeanServerInterceptor.java:1095) at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.exclusiveUnregisterMBean(DefaultMBeanServerInterceptor.java:427) at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.unregisterMBean(DefaultMBeanServerInterceptor.java:415) at com.sun.jmx.mbeanserver.JmxMBeanServer.unregisterMBean(JmxMBeanServer.java:546) at org.apache.hadoop.metrics2.util.MBeans.unregister(MBeans.java:112) at org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetImpl.shutdown(FsDatasetImpl.java:2127) at org.apache.hadoop.hdfs.server.datanode.DataNode.shutdown(DataNode.java:2016) at org.apache.hadoop.hdfs.MiniDFSCluster.shutdownDataNodes(MiniDFSCluster.java:1985) at org.apache.hadoop.hdfs.MiniDFSCluster.shutdown(MiniDFSCluster.java:1962) at org.apache.hadoop.hdfs.MiniDFSCluster.shutdown(MiniDFSCluster.java:1936) at org.apache.hadoop.hdfs.MiniDFSCluster.shutdown(MiniDFSCluster.java:1929) at org.apache.hadoop.hdfs.TestDatanodeReport.testDatanodeReport(TestDatanodeReport.java:144) {noformat} The test shuts down datanode, and then shutdown cluster, which shuts down the a datanode twice. Resetting the FsDatasetSpi reference in DataNode to null resolves the issue. -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org