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From "Mike Drob (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-8548) Minicluster throws NPE on shutdown
Date Fri, 05 Jun 2015 22:13:00 GMT
Mike Drob created HDFS-8548:
-------------------------------

             Summary: Minicluster throws NPE on shutdown
                 Key: HDFS-8548
                 URL: https://issues.apache.org/jira/browse/HDFS-8548
             Project: Hadoop HDFS
          Issue Type: Bug
    Affects Versions: 2.6.0
            Reporter: Mike Drob


After running Solr tests, when we attempt to shut down the mini cluster that we use for our
unit tests, we get an NPE in the clean up thread. The test still completes normally, but this
generates a lot of extra noise.

{noformat}
   [junit4]   2> java.lang.reflect.InvocationTargetException
   [junit4]   2> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   [junit4]   2> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
   [junit4]   2> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
   [junit4]   2> 	at java.lang.reflect.Method.invoke(Method.java:497)
   [junit4]   2> 	at org.apache.hadoop.metrics2.lib.MethodMetric$2.snapshot(MethodMetric.java:111)
   [junit4]   2> 	at org.apache.hadoop.metrics2.lib.MethodMetric.snapshot(MethodMetric.java:144)
   [junit4]   2> 	at org.apache.hadoop.metrics2.lib.MetricsRegistry.snapshot(MetricsRegistry.java:387)
   [junit4]   2> 	at org.apache.hadoop.metrics2.lib.MetricsSourceBuilder$1.getMetrics(MetricsSourceBuilder.java:79)
   [junit4]   2> 	at org.apache.hadoop.metrics2.impl.MetricsSourceAdapter.getMetrics(MetricsSourceAdapter.java:195)
   [junit4]   2> 	at org.apache.hadoop.metrics2.impl.MetricsSourceAdapter.updateJmxCache(MetricsSourceAdapter.java:172)
   [junit4]   2> 	at org.apache.hadoop.metrics2.impl.MetricsSourceAdapter.getMBeanInfo(MetricsSourceAdapter.java:151)
   [junit4]   2> 	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.getClassName(DefaultMBeanServerInterceptor.java:1804)
   [junit4]   2> 	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.safeGetClassName(DefaultMBeanServerInterceptor.java:1595)
   [junit4]   2> 	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.checkMBeanPermission(DefaultMBeanServerInterceptor.java:1813)
   [junit4]   2> 	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.exclusiveUnregisterMBean(DefaultMBeanServerInterceptor.java:430)
   [junit4]   2> 	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.unregisterMBean(DefaultMBeanServerInterceptor.java:415)
   [junit4]   2> 	at com.sun.jmx.mbeanserver.JmxMBeanServer.unregisterMBean(JmxMBeanServer.java:546)
   [junit4]   2> 	at org.apache.hadoop.metrics2.util.MBeans.unregister(MBeans.java:81)
   [junit4]   2> 	at org.apache.hadoop.metrics2.impl.MetricsSourceAdapter.stopMBeans(MetricsSourceAdapter.java:227)
   [junit4]   2> 	at org.apache.hadoop.metrics2.impl.MetricsSourceAdapter.stop(MetricsSourceAdapter.java:212)
   [junit4]   2> 	at org.apache.hadoop.metrics2.impl.MetricsSystemImpl.stopSources(MetricsSystemImpl.java:461)
   [junit4]   2> 	at org.apache.hadoop.metrics2.impl.MetricsSystemImpl.stop(MetricsSystemImpl.java:212)
   [junit4]   2> 	at org.apache.hadoop.metrics2.impl.MetricsSystemImpl.shutdown(MetricsSystemImpl.java:592)
   [junit4]   2> 	at org.apache.hadoop.metrics2.lib.DefaultMetricsSystem.shutdownInstance(DefaultMetricsSystem.java:72)
   [junit4]   2> 	at org.apache.hadoop.metrics2.lib.DefaultMetricsSystem.shutdown(DefaultMetricsSystem.java:68)
   [junit4]   2> 	at org.apache.hadoop.hdfs.server.namenode.metrics.NameNodeMetrics.shutdown(NameNodeMetrics.java:145)
   [junit4]   2> 	at org.apache.hadoop.hdfs.server.namenode.NameNode.stop(NameNode.java:822)
   [junit4]   2> 	at org.apache.hadoop.hdfs.MiniDFSCluster.shutdown(MiniDFSCluster.java:1720)
   [junit4]   2> 	at org.apache.hadoop.hdfs.MiniDFSCluster.shutdown(MiniDFSCluster.java:1699)
   [junit4]   2> 	at org.apache.solr.cloud.hdfs.HdfsTestUtil.teardownClass(HdfsTestUtil.java:197)
   [junit4]   2> 	at org.apache.solr.core.HdfsDirectoryFactoryTest.teardownClass(HdfsDirectoryFactoryTest.java:67)
   [junit4]   2> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   [junit4]   2> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
   [junit4]   2> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
   [junit4]   2> 	at java.lang.reflect.Method.invoke(Method.java:497)
   [junit4]   2> 	at com.carrotsearch.randomizedtesting.RandomizedRunner.invoke(RandomizedRunner.java:1627)
   [junit4]   2> 	at com.carrotsearch.randomizedtesting.RandomizedRunner$5.evaluate(RandomizedRunner.java:799)
   [junit4]   2> 	at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
   [junit4]   2> 	at com.carrotsearch.randomizedtesting.rules.SystemPropertiesRestoreRule$1.evaluate(SystemPropertiesRestoreRule.java:57)
   [junit4]   2> 	at org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:46)
   [junit4]   2> 	at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
   [junit4]   2> 	at org.apache.lucene.util.TestRuleStoreClassName$1.evaluate(TestRuleStoreClassName.java:42)
   [junit4]   2> 	at com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:39)
   [junit4]   2> 	at com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:39)
   [junit4]   2> 	at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
   [junit4]   2> 	at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
   [junit4]   2> 	at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
   [junit4]   2> 	at org.apache.lucene.util.TestRuleAssertionsRequired$1.evaluate(TestRuleAssertionsRequired.java:54)
   [junit4]   2> 	at org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:48)
   [junit4]   2> 	at org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:65)
   [junit4]   2> 	at org.apache.lucene.util.TestRuleIgnoreTestSuites$1.evaluate(TestRuleIgnoreTestSuites.java:55)
   [junit4]   2> 	at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
   [junit4]   2> 	at com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:365)
   [junit4]   2> 	at java.lang.Thread.run(Thread.java:745)
   [junit4]   2> Caused by: java.lang.NullPointerException
   [junit4]   2> 	at org.apache.hadoop.hdfs.server.blockmanagement.BlocksMap.size(BlocksMap.java:198)
   [junit4]   2> 	at org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.getTotalBlocks(BlockManager.java:3291)
   [junit4]   2> 	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getBlocksTotal(FSNamesystem.java:6223)
   [junit4]   2> 	... 54 more
{noformat}



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