So it looks like the problem might be that one of the keys in the map has a null value. Is that just not supported in Pig or is that a bug?
-Xavier On 3/29/11 2:02 PM, Xavier Stevens wrote: > The value is a mixture of types. I'll go through and spit out what types > it has and get back to you. > > Thanks Alan. > > > On 3/29/11 1:56 PM, Alan Gates wrote: >> What are you putting in as the value of the map? From the error it >> looks like your passing in a datatype Pig doesn't understand, and when >> it tries to write it out to the screen it doesn't know how to. >> >> Alan. >> >> On Mar 29, 2011, at 1:34 PM, Xavier Stevens wrote: >> >>> I'm currently getting a really weird error coming from one of my eval >>> functions. It expects a tuple where the first element is a string and >>> then outputs a Map<String,Object> as a result. I put in some debug code >>> and I can see the value I get is what I expect and that the resulting >>> map size is 35 elements. Anyone seen a problem like this before? >>> >>> Thanks, >>> >>> -Xavier >>> >>> Pig script line: >>> >>> genmap = FOREACH raw GENERATE >>> com.mozilla.pig.eval.json.JsonMap(processed_json) AS >>> processed_json_map:map[]; >>> >>> Log file: >>> >>> ERROR 2997: Unable to recreate exception from backed error: >>> java.io.IOException: java.lang.RuntimeException: Unexpected data type -1 >>> found in stream. >>> >>> org.apache.pig.impl.logicalLayer.FrontendException: ERROR 1066: Unable >>> to open iterator for alias genmap. Backend error : Unable to recreate >>> exception from backed error: java.io.IOException: >>> java.lang.RuntimeException: Unexpected data type -1 found in stream. >>> at org.apache.pig.PigServer.openIterator(PigServer.java:742) >>> at >>> org.apache.pig.tools.grunt.GruntParser.processDump(GruntParser.java:612) >>> at >>> org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:303) >>> >>> 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:465) >>> at org.apache.pig.Main.main(Main.java:107) >>> Caused by: org.apache.pig.backend.executionengine.ExecException: ERROR >>> 2997: Unable to recreate exception from backed error: >>> java.io.IOException: java.lang.RuntimeException: Unexpected data type -1 >>> found in stream. >>> at >>> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.Launcher.getErrorMessages(Launcher.java:221) >>> >>> at >>> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.Launcher.getStats(Launcher.java:154) >>> >>> at >>> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher.launchPig(MapReduceLauncher.java:337) >>> >>> at >>> org.apache.pig.backend.hadoop.executionengine.HExecutionEngine.execute(HExecutionEngine.java:378) >>> >>> at >>> org.apache.pig.PigServer.executeCompiledLogicalPlan(PigServer.java:1198) >>> at org.apache.pig.PigServer.storeEx(PigServer.java:874) >>> at org.apache.pig.PigServer.store(PigServer.java:816) >>> at org.apache.pig.PigServer.openIterator(PigServer.java:728) >>> ... 7 more >>>
