[HDFS-5839] TestWebHDFS#testNamenodeRestart fails with NullPointerException in trunk

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Duplicate
• Assignee: Mit Desai
• Reporter: Ted Yu
• Created: 27/Jan/14 19:17
• Updated: 04/Mar/14 22:09
• Resolved: 04/Mar/14 22:09

Description

Here is test failure:

testNamenodeRestart(org.apache.hadoop.hdfs.web.TestWebHDFS)  Time elapsed: 45.206 sec  <<< FAILURE!
java.lang.AssertionError: There are 1 exception(s):
  Exception 0: org.apache.hadoop.ipc.RemoteException(java.lang.NullPointerException): null
        at org.apache.hadoop.hdfs.web.JsonUtil.toRemoteException(JsonUtil.java:157)
        at org.apache.hadoop.hdfs.web.WebHdfsFileSystem.validateResponse(WebHdfsFileSystem.java:315)
        at org.apache.hadoop.hdfs.web.WebHdfsFileSystem.access$700(WebHdfsFileSystem.java:104)
        at org.apache.hadoop.hdfs.web.WebHdfsFileSystem$AbstractRunner.getResponse(WebHdfsFileSystem.java:615)
        at org.apache.hadoop.hdfs.web.WebHdfsFileSystem$AbstractRunner.run(WebHdfsFileSystem.java:532)
        at org.apache.hadoop.hdfs.web.WebHdfsFileSystem$OffsetUrlOpener.connect(WebHdfsFileSystem.java:878)
        at org.apache.hadoop.hdfs.web.ByteRangeInputStream.openInputStream(ByteRangeInputStream.java:119)
        at org.apache.hadoop.hdfs.web.ByteRangeInputStream.getInputStream(ByteRangeInputStream.java:103)
        at org.apache.hadoop.hdfs.web.ByteRangeInputStream.read(ByteRangeInputStream.java:180)
        at java.io.FilterInputStream.read(FilterInputStream.java:83)
        at org.apache.hadoop.hdfs.TestDFSClientRetries$5.run(TestDFSClientRetries.java:954)
        at java.lang.Thread.run(Thread.java:724)

        at org.junit.Assert.fail(Assert.java:93)
        at org.apache.hadoop.hdfs.TestDFSClientRetries.assertEmpty(TestDFSClientRetries.java:1083)
        at org.apache.hadoop.hdfs.TestDFSClientRetries.namenodeRestartTest(TestDFSClientRetries.java:1003)
        at org.apache.hadoop.hdfs.web.TestWebHDFS.testNamenodeRestart(TestWebHDFS.java:216)

From test output:

2014-01-27 17:55:59,388 WARN  resources.ExceptionHandler (ExceptionHandler.java:toResponse(92)) - INTERNAL_SERVER_ERROR
java.lang.NullPointerException
        at org.apache.hadoop.hdfs.server.namenode.web.resources.NamenodeWebHdfsMethods.chooseDatanode(NamenodeWebHdfsMethods.java:166)
        at org.apache.hadoop.hdfs.server.namenode.web.resources.NamenodeWebHdfsMethods.redirectURI(NamenodeWebHdfsMethods.java:231)
        at org.apache.hadoop.hdfs.server.namenode.web.resources.NamenodeWebHdfsMethods.get(NamenodeWebHdfsMethods.java:658)
        at org.apache.hadoop.hdfs.server.namenode.web.resources.NamenodeWebHdfsMethods.access$400(NamenodeWebHdfsMethods.java:116)
        at org.apache.hadoop.hdfs.server.namenode.web.resources.NamenodeWebHdfsMethods$3.run(NamenodeWebHdfsMethods.java:631)
        at org.apache.hadoop.hdfs.server.namenode.web.resources.NamenodeWebHdfsMethods$3.run(NamenodeWebHdfsMethods.java:626)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:415)
        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1560)
        at org.apache.hadoop.hdfs.server.namenode.web.resources.NamenodeWebHdfsMethods.get(NamenodeWebHdfsMethods.java:626)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at com.sun.jersey.spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60)
        at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$ResponseOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:205)
        at com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75)
        at com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:288)
        at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
        at com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108)
        at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
        at com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84)

Issue Links

• duplicates: HDFS-5857 TestWebHDFS#testNamenodeRestart fails intermittently with NPE