[HADOOP-12253] ViewFileSystem getFileStatus java.lang.ArrayIndexOutOfBoundsException: 0

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Duplicate
• Affects Version/s: 2.6.0
• Component/s: fs

Environment

hadoop 2.6.0 hive 1.1.0 tez0.7 cenos6.4

• Assignee: Ajith S
• Reporter: JiJun Tang
• Created: 22/Jul/15 06:37
• Updated: 31/May/20 16:31
• Resolved: 06/Apr/18 21:52

Description

sWhen I enable hdfs federation.I run a query on hive on tez. Then it occur a exception:

8.784 PM	WARN	org.apache.hadoop.security.UserGroupInformation	No groups available for user tangjijun
3:12:28.784 PM	ERROR	org.apache.hadoop.hive.ql.exec.Task	Failed to execute tez graph.

java.lang.ArrayIndexOutOfBoundsException: 0
	at org.apache.hadoop.fs.viewfs.ViewFileSystem$InternalDirOfViewFs.getFileStatus(ViewFileSystem.java:771)
	at org.apache.hadoop.fs.viewfs.ViewFileSystem.getFileStatus(ViewFileSystem.java:359)
	at org.apache.tez.client.TezClientUtils.checkAncestorPermissionsForAllUsers(TezClientUtils.java:955)
	at org.apache.tez.client.TezClientUtils.setupTezJarsLocalResources(TezClientUtils.java:184)
	at org.apache.tez.client.TezClient.getTezJarResources(TezClient.java:787)
	at org.apache.tez.client.TezClient.start(TezClient.java:337)
	at org.apache.hadoop.hive.ql.exec.tez.TezSessionState.open(TezSessionState.java:191)
	at org.apache.hadoop.hive.ql.exec.tez.TezTask.updateSession(TezTask.java:234)
	at org.apache.hadoop.hive.ql.exec.tez.TezTask.execute(TezTask.java:136)
	at org.apache.hadoop.hive.ql.exec.Task.executeTask(Task.java:160)
	at org.apache.hadoop.hive.ql.exec.TaskRunner.runSequential(TaskRunner.java:88)
	at org.apache.hadoop.hive.ql.Driver.launchTask(Driver.java:1640)
	at org.apache.hadoop.hive.ql.Driver.execute(Driver.java:1399)
	at org.apache.hadoop.hive.ql.Driver.runInternal(Driver.java:1183)
	at org.apache.hadoop.hive.ql.Driver.run(Driver.java:1049)
	at org.apache.hadoop.hive.ql.Driver.run(Driver.java:1044)
	at org.apache.hive.service.cli.operation.SQLOperation.runQuery(SQLOperation.java:144)
	at org.apache.hive.service.cli.operation.SQLOperation.access$100(SQLOperation.java:69)
	at org.apache.hive.service.cli.operation.SQLOperation$1$1.run(SQLOperation.java:196)
	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:1671)
	at org.apache.hive.service.cli.operation.SQLOperation$1.run(SQLOperation.java:208)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:745)

I digging into the issue,I found the code snippet in ViewFileSystem.java as follows:

 @Override
    public FileStatus getFileStatus(Path f) throws IOException {
      checkPathIsSlash(f);
      return new FileStatus(0, true, 0, 0, creationTime, creationTime,
          PERMISSION_555, ugi.getUserName(), ugi.getGroupNames()[0],

          new Path(theInternalDir.fullPath).makeQualified(
              myUri, ROOT_PATH));
    }

If the node in cluster haven't creat user like tangjijun,ugi.getGroupNames()[0] will throw ArrayIndexOutOfBoundsException.Because no user mean no group.

I create user tangjijun on that node. Then the job was executed normally.
I think this code should check ugi.getGroupNames() is empty.When it is empty ,then print some log. Not to throw exception.

Issue Links

• duplicates: HADOOP-13442 Optimize UGI group lookups