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
