Wei-Chiu Chuang created HDFS-11041:
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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.
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