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From "Thejas M Nair (JIRA)" <j...@apache.org>
Subject [jira] Created: (PIG-1649) FRJoin fails to compute number of input files for replicated input
Date Mon, 27 Sep 2010 22:05:35 GMT
FRJoin fails to compute number of input files for replicated input
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                 Key: PIG-1649
                 URL: https://issues.apache.org/jira/browse/PIG-1649
             Project: Pig
          Issue Type: Bug
    Affects Versions: 0.8.0
            Reporter: Thejas M Nair
            Assignee: Thejas M Nair
             Fix For: 0.8.0


In FRJoin, if input path has curly braces, it fails to compute number of input files and logs
the following exception in the log -

10/09/27 14:31:13 WARN mapReduceLayer.MRCompiler: failed to get number of input files
java.net.URISyntaxException: Illegal character in path at index 12: /user/tejas/{std*txt}
        at java.net.URI$Parser.fail(URI.java:2809)
        at java.net.URI$Parser.checkChars(URI.java:2982)
        at java.net.URI$Parser.parseHierarchical(URI.java:3066)
        at java.net.URI$Parser.parse(URI.java:3024)
        at java.net.URI.<init>(URI.java:578)
        at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MRCompiler.hasTooManyInputFiles(MRCompiler.java:1283)
        at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MRCompiler.visitFRJoin(MRCompiler.java:1203)
        at org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POFRJoin.visit(POFRJoin.java:188)
        at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MRCompiler.compile(MRCompiler.java:475)
        at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MRCompiler.compile(MRCompiler.java:454)
        at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MRCompiler.compile(MRCompiler.java:336)
        at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher.compile(MapReduceLauncher.java:468)
        at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher.launchPig(MapReduceLauncher.java:116)
        at org.apache.pig.backend.hadoop.executionengine.HExecutionEngine.execute(HExecutionEngine.java:301)
        at org.apache.pig.PigServer.executeCompiledLogicalPlan(PigServer.java:1197)
        at org.apache.pig.PigServer.storeEx(PigServer.java:873)
        at org.apache.pig.PigServer.store(PigServer.java:815)
        at org.apache.pig.PigServer.openIterator(PigServer.java:727)
        at org.apache.pig.tools.grunt.GruntParser.processDump(GruntParser.java:612)
        at org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:301)
        at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:165)
        at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:141)
        at org.apache.pig.tools.grunt.Grunt.run(Grunt.java:76)
        at org.apache.pig.Main.run(Main.java:453)
        at org.apache.pig.Main.main(Main.java:107)

This does not cause a query to fail. But since the number of input files don't get calculated,
the optimizations added in PIG-1458 to reduce load on name node will not get used.


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