[
https://issues.apache.org/jira/browse/PIG-2533?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13208210#comment-13208210
]
Dmitriy V. Ryaboy commented on PIG-2533:
----------------------------------------
Looks like this is also in JobControlThreadExceptionHandler in the same class.
It was clearly put in there for some reason.. but I, too, find this extremely
frustrating to debug.
Will ask Daniel to see if he remembers the motivation for only printing the
first line of the error stack.
> Pig MR job exceptions masked on frontend
> ----------------------------------------
>
> Key: PIG-2533
> URL: https://issues.apache.org/jira/browse/PIG-2533
> Project: Pig
> Issue Type: Bug
> Reporter: Travis Crawford
> Assignee: Travis Crawford
> Attachments: PIG-2533.patch
>
>
> Pig MR jobs failures produce misleading error messages because just the first
> line of the error message is reported. Printing the whole error message is
> very useful when debugging issues as the current version is very misleading
> about the source of an issue.
> PRINTING WHOLE ERROR MESSAGE:
> {code}
> 2012-02-14 21:55:53,936 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR
> 6017: java.io.IOException: Deserialization error:
> org.apache.hcatalog.data.schema.HCatSchema
> at
> org.apache.pig.impl.util.ObjectSerializer.deserialize(ObjectSerializer.java:55)
> at org.apache.pig.impl.util.UDFContext.deserialize(UDFContext.java:181)
> at
> org.apache.pig.backend.hadoop.executionengine.util.MapRedUtil.setupUDFContext(MapRedUtil.java:159)
> at
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigOutputFormat.setupUdfEnvAndStores(PigOutputFormat.java:229)
> at
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigOutputFormat.checkOutputSpecs(PigOutputFormat.java:186)
> at
> org.apache.hadoop.mapred.JobClient.submitJobInternal(JobClient.java:811)
> at org.apache.hadoop.mapred.JobClient.submitJob(JobClient.java:771)
> at org.apache.hadoop.mapred.jobcontrol.Job.submit(Job.java:378)
> at
> org.apache.hadoop.mapred.jobcontrol.JobControl.startReadyJobs(JobControl.java:247)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigJobControl.mainLoopAction(PigJobControl.java:144)
> at
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigJobControl.run(PigJobControl.java:121)
> at java.lang.Thread.run(Thread.java:662)
> Caused by: java.lang.ClassNotFoundException:
> org.apache.hcatalog.data.schema.HCatSchema
> at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
> at java.security.AccessController.doPrivileged(Native Method)
> at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
> at java.lang.Class.forName0(Native Method)
> at java.lang.Class.forName(Class.java:247)
> at java.io.ObjectInputStream.resolveClass(ObjectInputStream.java:603)
> at
> java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1574)
> at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1495)
> at
> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1731)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)
> at java.io.ObjectInputStream.readObject(ObjectInputStream.java:350)
> at java.util.Hashtable.readObject(Hashtable.java:859)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at
> java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974)
> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1848)
> at
> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1752)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)
> at java.io.ObjectInputStream.readObject(ObjectInputStream.java:350)
> at java.util.HashMap.readObject(HashMap.java:1030)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at
> java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974)
> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1848)
> at
> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1752)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)
> at java.io.ObjectInputStream.readObject(ObjectInputStream.java:350)
> at
> org.apache.pig.impl.util.ObjectSerializer.deserialize(ObjectSerializer.java:53)
> ... 15 more
> {code}
> CURRENT ERROR MESSAGE:
> {code}
> Pig Stack Trace
> ---------------
> ERROR 6017: java.io.IOException: Deserialization error:
> org.apache.hcatalog.data.schema.HCatSchema
> org.apache.pig.impl.logicalLayer.FrontendException: ERROR 1066: Unable to
> open iterator for alias l
> at org.apache.pig.PigServer.openIterator(PigServer.java:857)
> at
> org.apache.pig.tools.grunt.GruntParser.processDump(GruntParser.java:655)
> at
> org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:303)
> at
> org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:188)
> at
> org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:164)
> at org.apache.pig.tools.grunt.Grunt.exec(Grunt.java:84)
> at org.apache.pig.Main.run(Main.java:561)
> at org.apache.pig.Main.main(Main.java:111)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at org.apache.hadoop.util.RunJar.main(RunJar.java:156)
> Caused by: org.apache.pig.PigException: ERROR 1002: Unable to store alias l
> at org.apache.pig.PigServer.storeEx(PigServer.java:956)
> at org.apache.pig.PigServer.store(PigServer.java:919)
> at org.apache.pig.PigServer.openIterator(PigServer.java:832)
> ... 12 more
> Caused by: org.apache.pig.backend.executionengine.ExecException: ERROR 6017:
> java.io.IOException: Deserialization error:
> org.apache.hcatalog.data.schema.HCatSchema
> at
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher.launchPig(MapReduceLauncher.java:301)
> at org.apache.pig.PigServer.launchPlan(PigServer.java:1270)
> at
> org.apache.pig.PigServer.executeCompiledLogicalPlan(PigServer.java:1255)
> at org.apache.pig.PigServer.storeEx(PigServer.java:952)
> ... 14 more
> ================================================================================
> {code}
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators:
https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira
