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From "Daryn Sharp (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-14699) Impersonation errors with UGI after second principal relogin
Date Mon, 31 Jul 2017 15:08:00 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-14699?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16107404#comment-16107404
] 

Daryn Sharp commented on HADOOP-14699:
--------------------------------------

This will be fixed by HADOOP-9747 – if someone ever reviews it...  Removing the synchronization
removed the class static fields that allow this to occur.

> Impersonation errors with UGI after second principal relogin
> ------------------------------------------------------------
>
>                 Key: HADOOP-14699
>                 URL: https://issues.apache.org/jira/browse/HADOOP-14699
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: common
>    Affects Versions: 2.6.2, 2.7.3, 2.8.1
>            Reporter: Jeff Storck
>
> Multiple principals that are logged in using UGI instances that are instantiated from
a UGI class loaded by the same classloader will encounter problems when the second principal
attempts to relogin and perform an action using a UGI.doAs().  An impersonation will occur
and the operation attempted by the second principal after relogging in will fail.  There should
not be an implicit attempt to impersonate the second principal through the first principal
that logged in.
> I have created  a GitHub project that exhibits the impersonation error with brief instructions
on how to set up for the test and run it: https://github.com/jtstorck/kerberos-examples/tree/master/hadoop/ugi-test
> {noformat}18:44:55.687 [pool-2-thread-2] WARN  h.u.U.UgiRunnable.ugitest2@EXAMPLE.COM
- Unexpected exception while performing task for [ugitest2@EXAMPLE.COM (auth:KERBEROS)]
> org.apache.hadoop.ipc.RemoteException: User: ugitest1@EXAMPLE.COM is not allowed to impersonate
ugitest2@EXAMPLE.COM
> 	at org.apache.hadoop.ipc.Client.getRpcResponse(Client.java:1481)
> 	at org.apache.hadoop.ipc.Client.call(Client.java:1427)
> 	at org.apache.hadoop.ipc.Client.call(Client.java:1337)
> 	at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:227)
> 	at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:116)
> 	at com.sun.proxy.$Proxy9.getFileInfo(Unknown Source)
> 	at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.getFileInfo(ClientNamenodeProtocolTranslatorPB.java:787)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> 	at java.lang.reflect.Method.invoke(Method.java:498)
> 	at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:398)
> 	at org.apache.hadoop.io.retry.RetryInvocationHandler$Call.invokeMethod(RetryInvocationHandler.java:163)
> 	at org.apache.hadoop.io.retry.RetryInvocationHandler$Call.invoke(RetryInvocationHandler.java:155)
> 	at org.apache.hadoop.io.retry.RetryInvocationHandler$Call.invokeOnce(RetryInvocationHandler.java:95)
> 	at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:335)
> 	at com.sun.proxy.$Proxy10.getFileInfo(Unknown Source)
> 	at org.apache.hadoop.hdfs.DFSClient.getFileInfo(DFSClient.java:1700)
> 	at org.apache.hadoop.hdfs.DistributedFileSystem$27.doCall(DistributedFileSystem.java:1436)
> 	at org.apache.hadoop.hdfs.DistributedFileSystem$27.doCall(DistributedFileSystem.java:1433)
> 	at org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81)
> 	at org.apache.hadoop.hdfs.DistributedFileSystem.getFileStatus(DistributedFileSystem.java:1448)
> 	at hadoop.ugitest.UgiTestMain$UgiRunnable.lambda$run$2(UgiTestMain.java:194)
> 	at java.security.AccessController.doPrivileged(Native Method)
> 	at javax.security.auth.Subject.doAs(Subject.java:422)
> 	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1807)
> 	at hadoop.ugitest.UgiTestMain$UgiRunnable.run(UgiTestMain.java:194)
> 	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> 	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> 	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
> 	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
> 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> 	at java.lang.Thread.run(Thread.java:745){noformat}



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