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https://issues.apache.org/jira/browse/HDFS-16832?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17636809#comment-17636809
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Erik Krogen commented on HDFS-16832:
------------------------------------
Merged to branch-3.3 as well since that has HDFS-16732 also.
> [SBN READ] Fix NPE when check the block location of empty directory
> -------------------------------------------------------------------
>
> Key: HDFS-16832
> URL: https://issues.apache.org/jira/browse/HDFS-16832
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: zhengchenyu
> Assignee: zhengchenyu
> Priority: Major
> Labels: pull-request-available
> Fix For: 3.4.0, 3.3.5
>
>
> HDFS-16732 is introduced for check block location when getListing or
> getFileInfo. But When we check block location of empty directory will throw
> NPE.
> Exception stack on tez client are below:
> {code:java}
> org.apache.hadoop.ipc.RemoteException(java.lang.NullPointerException):
> java.lang.NullPointerException
> at org.apache.hadoop.ipc.Client.getRpcResponse(Client.java:1554)
> at org.apache.hadoop.ipc.Client.call(Client.java:1492)
> at org.apache.hadoop.ipc.Client.call(Client.java:1389)
> at
> org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:233)
> at
> org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:118)
> at com.sun.proxy.$Proxy12.getListing(Unknown Source)
> at
> org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.getListing(ClientNamenodeProtocolTranslatorPB.java:678)
> at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at
> org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:422)
> at
> org.apache.hadoop.io.retry.RetryInvocationHandler$Call.invokeMethod(RetryInvocationHandler.java:165)
> at
> org.apache.hadoop.io.retry.RetryInvocationHandler$Call.invoke(RetryInvocationHandler.java:157)
> at
> org.apache.hadoop.io.retry.RetryInvocationHandler$Call.invokeOnce(RetryInvocationHandler.java:95)
> at
> org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:359)
> at com.sun.proxy.$Proxy13.getListing(Unknown Source)
> at org.apache.hadoop.hdfs.DFSClient.listPaths(DFSClient.java:1671)
> at
> org.apache.hadoop.hdfs.DistributedFileSystem$DirListingIterator.(DistributedFileSystem.java:1212)
> at
> org.apache.hadoop.hdfs.DistributedFileSystem$DirListingIterator.(DistributedFileSystem.java:1195)
> at
> org.apache.hadoop.hdfs.DistributedFileSystem$25.doCall(DistributedFileSystem.java:1140)
> at
> org.apache.hadoop.hdfs.DistributedFileSystem$25.doCall(DistributedFileSystem.java:1136)
> at
> org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81)
> at
> org.apache.hadoop.hdfs.DistributedFileSystem.listLocatedStatus(DistributedFileSystem.java:1154)
> at
> org.apache.hadoop.fs.FileSystem.listLocatedStatus(FileSystem.java:2054)
> at
> org.apache.hadoop.mapred.FileInputFormat.singleThreadedListStatus(FileInputFormat.java:278)
> at
> org.apache.hadoop.mapred.FileInputFormat.listStatus(FileInputFormat.java:239)
> at
> org.apache.hadoop.mapred.FileInputFormat.getSplits(FileInputFormat.java:325)
> at
> org.apache.hadoop.hive.ql.io.HiveInputFormat.addSplitsForGroup(HiveInputFormat.java:306)
> at
> org.apache.hadoop.hive.ql.io.HiveInputFormat.getSplits(HiveInputFormat.java:408)
> at
> org.apache.hadoop.hive.ql.exec.tez.HiveSplitGenerator.initialize(HiveSplitGenerator.java:159)
> at
> org.apache.tez.dag.app.dag.RootInputInitializerManager$InputInitializerCallable$1.run(RootInputInitializerManager.java:279)
> at
> org.apache.tez.dag.app.dag.RootInputInitializerManager$InputInitializerCallable$1.run(RootInputInitializerManager.java:270)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:422)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1730)
> at
> org.apache.tez.dag.app.dag.RootInputInitializerManager$InputInitializerCallable.call(RootInputInitializerManager.java:270)
> at
> org.apache.tez.dag.app.dag.RootInputInitializerManager$InputInitializerCallable.call(RootInputInitializerManager.java:254)
> at
> com.google.common.util.concurrent.TrustedListenableFutureTask$TrustedFutureInterruptibleTask.runInterruptibly(TrustedListenableFutureTask.java:125)
> at
> com.google.common.util.concurrent.InterruptibleTask.run(InterruptibleTask.java:57)
> at
> com.google.common.util.concurrent.TrustedListenableFutureTask.run(TrustedListenableFutureTask.java:78)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> at java.lang.Thread.run(Thread.java:748) {code}
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