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From "Pradeep Kamath (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (PIG-1378) har url of the form har:///<path> not usable in Pig scripts (har://hdfs-namenode:port/<path> works)
Date Wed, 05 May 2010 17:28:05 GMT

     [ https://issues.apache.org/jira/browse/PIG-1378?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Pradeep Kamath resolved PIG-1378.
---------------------------------

    Release Note: The fix for this issue described in this jira depends on a issue with Hadoop
code which was fixed on the hadoop trunk ( https://issues.apache.org/jira/browse/MAPREDUCE-1522).
Until that goes into a hadoop release which is used by pig, this will remain an issue 
      Resolution: Fixed

Am closing this bug since the pig changes are in and hadoop changes are in trunk - this should
work once we use the appropriate hadoop release.

> har url of the form har:///<path> not usable in Pig scripts (har://hdfs-namenode:port/<path>
works)
> ---------------------------------------------------------------------------------------------------
>
>                 Key: PIG-1378
>                 URL: https://issues.apache.org/jira/browse/PIG-1378
>             Project: Pig
>          Issue Type: Bug
>          Components: impl
>    Affects Versions: 0.7.0
>            Reporter: Viraj Bhat
>            Assignee: Pradeep Kamath
>             Fix For: 0.8.0
>
>         Attachments: PIG-1378-2.patch, PIG-1378-3.patch, PIG-1378-4.patch, PIG-1378.patch
>
>
> I am trying to use har (Hadoop Archives) in my Pig script.
> I can use them through the HDFS shell
> {noformat}
> $hadoop fs -ls 'har:///user/viraj/project/subproject/files/size/data'
> Found 1 items
> -rw-------   5 viraj users    1537234 2010-04-14 09:49 user/viraj/project/subproject/files/size/data/part-00001
> {noformat}
> Using similar URL's in grunt yields
> {noformat}
> grunt> a = load 'har:///user/viraj/project/subproject/files/size/data'; 
> grunt> dump a;
> {noformat}
> {noformat}
> 2010-04-14 22:08:48,814 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR 2998: Unhandled
internal error. org.apache.pig.impl.logicalLayer.FrontendException: ERROR 0: Incompatible
file URI scheme: har : hdfs
> 2010-04-14 22:08:48,814 [main] WARN  org.apache.pig.tools.grunt.Grunt - There is no log
file to write to.
> 2010-04-14 22:08:48,814 [main] ERROR org.apache.pig.tools.grunt.Grunt - java.lang.Error:
org.apache.pig.impl.logicalLayer.FrontendException: ERROR 0: Incompatible file URI scheme:
har : hdfs
>         at org.apache.pig.impl.logicalLayer.parser.QueryParser.LoadClause(QueryParser.java:1483)
>         at org.apache.pig.impl.logicalLayer.parser.QueryParser.BaseExpr(QueryParser.java:1245)
>         at org.apache.pig.impl.logicalLayer.parser.QueryParser.Expr(QueryParser.java:911)
>         at org.apache.pig.impl.logicalLayer.parser.QueryParser.Parse(QueryParser.java:700)
>         at org.apache.pig.impl.logicalLayer.LogicalPlanBuilder.parse(LogicalPlanBuilder.java:63)
>         at org.apache.pig.PigServer$Graph.parseQuery(PigServer.java:1164)
>         at org.apache.pig.PigServer$Graph.registerQuery(PigServer.java:1114)
>         at org.apache.pig.PigServer.registerQuery(PigServer.java:425)
>         at org.apache.pig.tools.grunt.GruntParser.processPig(GruntParser.java:737)
>         at org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:324)
>         at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:162)
>         at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:138)
>         at org.apache.pig.tools.grunt.Grunt.run(Grunt.java:75)
>         at org.apache.pig.Main.main(Main.java:357)
> Caused by: org.apache.pig.impl.logicalLayer.FrontendException: ERROR 0: Incompatible
file URI scheme: har : hdfs
>         at org.apache.pig.LoadFunc.getAbsolutePath(LoadFunc.java:249)
>         at org.apache.pig.LoadFunc.relativeToAbsolutePath(LoadFunc.java:62)
>         at org.apache.pig.impl.logicalLayer.parser.QueryParser.LoadClause(QueryParser.java:1472)
>         ... 13 more
> {noformat}
> According to Jira http://issues.apache.org/jira/browse/PIG-1234 I try the following as
stated in the original description
> {noformat}
> grunt> a = load 'har://namenode-location/user/viraj/project/subproject/files/size/data';

> grunt> dump a;
> {noformat}
> {noformat}
> Caused by: org.apache.pig.backend.executionengine.ExecException: ERROR 2118: Unable to
create input splits for: har://namenode-location/user/viraj/project/subproject/files/size/data';

>         ... 8 more
> Caused by: java.io.IOException: No FileSystem for scheme: namenode-location
>         at .apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:1375)
>         at .apache.hadoop.fs.FileSystem.access(200(FileSystem.java:66)
>         at .apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:1390)
>         at .apache.hadoop.fs.FileSystem.get(FileSystem.java:196)
>         at .apache.hadoop.fs.HarFileSystem.initialize(HarFileSystem.java:104)
>         at .apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:1378)
>         at .apache.hadoop.fs.FileSystem.get(FileSystem.java:193)
>         at .apache.hadoop.fs.Path.getFileSystem(Path.java:175)
>         at .apache.hadoop.mapreduce.lib.input.FileInputFormat.listStatus(FileInputFormat.java:208)
>         at .apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigTextInputFormat.listStatus(PigTextInputFormat.java:36)
>         at .apache.hadoop.mapreduce.lib.input.FileInputFormat.getSplits(FileInputFormat.java:246)
>         at .apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigInputFormat.getSplits(PigInputFormat.java:245)
> {noformat}
> Viraj

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