chongchuanbing opened a new pull request #67:
URL: https://github.com/apache/tez/pull/67
when the path is root and it has the excute permisson, it will continue get
parent path to judge permisson. but the parent path of root will cause the
NullPointException.
the statck trace:
```
2020-05-15T14:57:17,544 ERROR [HiveServer2-Background-Pool: Thread-117]
exec.Task: Failed to execute tez graph.
org.apache.hadoop.ipc.RemoteException: java.lang.NullPointerException
at org.apache.hadoop.ipc.Client.call(Client.java:1476)
~[hadoop-common-2.7.7.jar:?]
at org.apache.hadoop.ipc.Client.call(Client.java:1413)
~[hadoop-common-2.7.7.jar:?]
at
org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:229)
~[hadoop-common-2.7.7.jar:?]
at com.sun.proxy.$Proxy30.getFileInfo(Unknown Source) ~[?:?]
at
org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.getFileInfo(ClientNamenodeProtocolTranslatorPB.java:776)
~[hadoop-hdfs-2.7.7.jar:?]
at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source) ~[?:?]
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
~[?:1.8.0_221]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_221]
at
org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:191)
~[hadoop-common-2.7.7.jar:?]
at
org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:102)
~[hadoop-common-2.7.7.jar:?]
at com.sun.proxy.$Proxy31.getFileInfo(Unknown Source) ~[?:?]
at org.apache.hadoop.hdfs.DFSClient.getFileInfo(DFSClient.java:2117)
~[hadoop-hdfs-2.7.7.jar:?]
at
org.apache.hadoop.hdfs.DistributedFileSystem$22.doCall(DistributedFileSystem.java:1305)
~[hadoop-hdfs-2.7.7.jar:?]
at
org.apache.hadoop.hdfs.DistributedFileSystem$22.doCall(DistributedFileSystem.java:1301)
~[hadoop-hdfs-2.7.7.jar:?]
at
org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81)
~[hadoop-common-2.7.7.jar:?]
at
org.apache.hadoop.hdfs.DistributedFileSystem.getFileStatus(DistributedFileSystem.java:1301)
~[hadoop-hdfs-2.7.7.jar:?]
at
org.apache.tez.client.TezClientUtils.checkAncestorPermissionsForAllUsers(TezClientUtils.java:1033)
~[tez-api-0.9.2.jar:0.9.2]
at
org.apache.tez.client.TezClientUtils.addLocalResources(TezClientUtils.java:277)
~[tez-api-0.9.2.jar:0.9.2]
at
org.apache.tez.client.TezClientUtils.setupTezJarsLocalResources(TezClientUtils.java:185)
~[tez-api-0.9.2.jar:0.9.2]
at
org.apache.tez.client.TezClient.getTezJarResources(TezClient.java:1156)
~[tez-api-0.9.2.jar:0.9.2]
at
org.apache.tez.client.TezClient.setupApplicationContext(TezClient.java:473)
~[tez-api-0.9.2.jar:0.9.2]
at org.apache.tez.client.TezClient.start(TezClient.java:401)
~[tez-api-0.9.2.jar:0.9.2]
at
org.apache.hadoop.hive.ql.exec.tez.TezSessionState.startSessionAndContainers(TezSessionState.java:376)
~[hive-exec-2.3.6.jar:2.3.6]
at
org.apache.hadoop.hive.ql.exec.tez.TezSessionState.openInternal(TezSessionState.java:323)
~[hive-exec-2.3.6.jar:2.3.6]
at
org.apache.hadoop.hive.ql.exec.tez.TezSessionPoolManager$TezSessionPoolSession.openInternal(TezSessionPoolManager.java:703)
~[hive-exec-2.3.6.jar:2.3.6]
at
org.apache.hadoop.hive.ql.exec.tez.TezSessionState.open(TezSessionState.java:196)
~[hive-exec-2.3.6.jar:2.3.6]
at
org.apache.hadoop.hive.ql.exec.tez.TezTask.updateSession(TezTask.java:303)
~[hive-exec-2.3.6.jar:2.3.6]
at
org.apache.hadoop.hive.ql.exec.tez.TezTask.execute(TezTask.java:168)
~[hive-exec-2.3.6.jar:2.3.6]
at org.apache.hadoop.hive.ql.exec.Task.executeTask(Task.java:199)
~[hive-exec-2.3.6.jar:2.3.6]
```
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