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Posted to common-issues@hadoop.apache.org by "Matthew Paduano (JIRA)" <ji...@apache.org> on 2016/01/05 00:34:40 UTC
[jira] [Updated] (HADOOP-12689) S3 filesystem operations stopped
working correctly
[ https://issues.apache.org/jira/browse/HADOOP-12689?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Matthew Paduano updated HADOOP-12689:
-------------------------------------
Status: Patch Available (was: In Progress)
> S3 filesystem operations stopped working correctly
> --------------------------------------------------
>
> Key: HADOOP-12689
> URL: https://issues.apache.org/jira/browse/HADOOP-12689
> Project: Hadoop Common
> Issue Type: Bug
> Affects Versions: 2.8.0, 3.0.0
> Reporter: Matthew Paduano
> Assignee: Matthew Paduano
> Priority: Minor
> Fix For: 2.7.1
>
>
> HADOOP-10542 was resolved by replacing "return null;" with throwing IOException. This causes several S3 filesystem operations to fail (possibly more code is expecting that null return value; these are just the calls I noticed):
> S3FileSystem.getFileStatus() (which no longer raises FileNotFoundException but instead IOException)
> FileSystem.exists() (which no longer returns false but instead raises IOException)
> S3FileSystem.create() (which no longer succeeds but instead raises IOException)
> Run command:
> hadoop distcp hdfs://localhost:9000/test s3://xxx:yyy@com.bar.foo/
> Resulting stack trace:
> 2015-12-11 10:04:34,030 FATAL [IPC Server handler 6 on 44861] org.apache.hadoop.mapred.TaskAttemptListenerImpl: Task: attempt_1449826461866_0005_m_000006_0 - exited : java.io.IOException: /test doesn't exist
> at org.apache.hadoop.fs.s3.Jets3tFileSystemStore.get(Jets3tFileSystemStore.java:170)
> at org.apache.hadoop.fs.s3.Jets3tFileSystemStore.retrieveINode(Jets3tFileSystemStore.java:221)
> 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 org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:187)
> at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:102)
> at com.sun.proxy.$Proxy17.retrieveINode(Unknown Source)
> at org.apache.hadoop.fs.s3.S3FileSystem.getFileStatus(S3FileSystem.java:340)
> at org.apache.hadoop.tools.mapred.CopyMapper.map(CopyMapper.java:230)
> at org.apache.hadoop.tools.mapred.CopyMapper.map(CopyMapper.java:50)
> at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:146)
> at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:787)
> at org.apache.hadoop.mapred.MapTask.run(MapTask.java:341)
> at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:164)
> 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:1657)
> at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)
> changing the "raise IOE..." to "return null" fixes all of the above code sites and allows distcp to succeed.
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