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From "Daniel Dai (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (PIG-2791) Pig does not work with ViewFileSystem
Date Mon, 24 Sep 2012 18:09:07 GMT

    [ https://issues.apache.org/jira/browse/PIG-2791?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13461959#comment-13461959
] 

Daniel Dai commented on PIG-2791:
---------------------------------

Committed to trunk.
                
> Pig does not work with ViewFileSystem
> -------------------------------------
>
>                 Key: PIG-2791
>                 URL: https://issues.apache.org/jira/browse/PIG-2791
>             Project: Pig
>          Issue Type: Bug
>          Components: grunt
>    Affects Versions: 0.10.0
>         Environment: Pig QE
>            Reporter: patrick white
>            Assignee: Rohini Palaniswamy
>            Priority: Blocker
>         Attachments: asf_test_notes.txt, FixMiniCluster-branch10-1.patch, FixMiniCluster-branch10.patch,
PIG-2791-0.patch, PIG-2791-1.patch, PIG-2791-2.patch, PIG-2791-3-branch10.patch, PIG-2791-3-trunk.patch,
PIG-2791-4-branch10.patch, PIG-2791-4-trunk.patch, PIG-2791-5-trunk.patch
>
>
> The Yahoo Pig QE team ran into a blocking issue when trying to test Client-Side Mount
Tables, on a Federated cluster with two NNs, this blocks Pig Testing on Federation. 
> Federation relies strongly on the use of CSMT with viewFS, QE found that in this configuration
it is not possible to enter grunt shell because Pig makes a call to getDefaultReplication()
on the fs, which is ambiguous over viewFS and causes core to throw a org.apache.hadoop.fs.viewfs.NotInMountpointException:
"getDefaultReplication on empty path is invalid".
> This in turn cause Pig to exit with an internal error as follows:
> 2012-07-06 22:20:25,657 [main] INFO  org.apache.pig.Main - Apache Pig version 0.10.1.0.1206081058
(r1348169) compiled Jun 08 2012, 17:58:42
> 2012-07-06 22:20:26,074 [main] WARN  org.apache.hadoop.conf.Configuration - mapred.used.genericoptionsparser
is deprecated. Instead, use mapreduce.client.genericoptionsparser.used
> 2012-07-06 22:20:26,076 [main] INFO  org.apache.pig.backend.hadoop.executionengine.HExecutionEngine
- Connecting to hadoop file system at: viewfs:///
> 2012-07-06 22:20:26,080 [main] WARN  org.apache.hadoop.conf.Configuration - fs.default.name
is deprecated. Instead, use fs.defaultFS
> 2012-07-06 22:20:26,522 [main] ERROR org.apache.pig.Main - ERROR 2999: Unexpected internal
error. getDefaultReplication on empty path is invalid
> 2012-07-06 22:20:26,522 [main] WARN  org.apache.pig.Main - There is no log file to write
to.
> 2012-07-06 22:20:26,522 [main] ERROR org.apache.pig.Main - org.apache.hadoop.fs.viewfs.NotInMountpointException:
getDefaultReplication on empty path is invalid
>         at org.apache.hadoop.fs.viewfs.ViewFileSystem.getDefaultReplication(ViewFileSystem.java:482)
>         at org.apache.pig.backend.hadoop.datastorage.HDataStorage.init(HDataStorage.java:77)
>         at org.apache.pig.backend.hadoop.datastorage.HDataStorage.<init>(HDataStorage.java:58)
>         at org.apache.pig.backend.hadoop.executionengine.HExecutionEngine.init(HExecutionEngine.java:205)
>         at org.apache.pig.backend.hadoop.executionengine.HExecutionEngine.init(HExecutionEngine.java:118)
>         at org.apache.pig.impl.PigContext.connect(PigContext.java:208)
>         at org.apache.pig.PigServer.<init>(PigServer.java:246)
>         at org.apache.pig.PigServer.<init>(PigServer.java:231)
>         at org.apache.pig.tools.grunt.Grunt.<init>(Grunt.java:47)
>         at org.apache.pig.Main.run(Main.java:487)
>         at org.apache.pig.Main.main(Main.java:111)

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