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Posted to user@pig.apache.org by de...@wipro.com on 2010/12/13 07:36:27 UTC
ERROR 6015: During execution, encountered a Hadoop error | ERROR
1066: Unable to open iterator for alias grouped_records
Hi,
I loaded a csv file with about 10 fields into PigStorage and tried to do a GROUP BY on one of the fields. The MapReduce job gets created, and the Mappers finish execution.
But after that, the job fails with the following error messages:
2010-12-13 10:31:08,902 [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher - 100% complete
2010-12-13 10:31:08,902 [main] ERROR org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher - 1 map reduce job(s) failed!
2010-12-13 10:31:08,911 [main] ERROR org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher - Failed to produce result in: "hdfs://hadoop.namenode:54310/tmp/temp2041073534/tmp-2060206542"
2010-12-13 10:31:08,911 [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher - Failed!
2010-12-13 10:31:08,961 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR 6015: During execution, encountered a Hadoop error.
2010-12-13 10:31:08,961 [main] ERROR org.apache.pig.tools.grunt.Grunt - org.apache.pig.impl.logicalLayer.FrontendException: ERROR 1066: Unable to open iterator for alias grouped_records
at org.apache.pig.PigServer.openIterator(PigServer.java:521)
at org.apache.pig.tools.grunt.GruntParser.processDump(GruntParser.java:544)
at org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:241)
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.backend.executionengine.ExecException: ERROR 6015: During execution, encountered a Hadoop error.
at .util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:768)
at .apache.hadoop.mapred.ReduceTask(ReduceCopier$GetMapEventsThread.getMapCompletionEvents(ReduceTask.java:2683)
Caused by: java.lang.NullPointerException
... 2 more
The filter statements (Mapper only) work properly, so it's not that nothing is running.
What's the issue here?
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RE: ERROR 6015: During execution, encountered a Hadoop error |
ERROR 1066: Unable to open iterator for alias grouped_records
Posted by de...@wipro.com.
Hi Thejas,
you suggested that there might be something wrong with Hadoop configuration itself.
My other mapreduce jobs are running fine. I am able to run word-count example etc. Only PIG jobs are failing. Any ideas?
________________________________
From: Thejas M Nair [mailto:tejas@yahoo-inc.com]
Sent: Monday, December 13, 2010 7:32 PM
To: user@pig.apache.org; Deepak Choudhary N (WT01 - Product Engineering Services)
Subject: Re: ERROR 6015: During execution, encountered a Hadoop error | ERROR 1066: Unable to open iterator for alias grouped_records
>From the job tracker web UI, you should be able see the MR job run by this pig query. If you follow the links, you should be able to find the reduce task logs.
Thanks,
Thejas
On 12/13/10 5:11 AM, "deepak.n85@wipro.com" <de...@wipro.com> wrote:
My Script:
records = LOAD 'hdfs://hadoop.namenode:54310/data' USING PigStorage(',')
AS (Year:int, Month:int,DayofMonth:int,DayofWeek:int);
grouped_records = GROUP records BY Month;
DUMP grouped_records;
Hadoop Version: 0.20.2
Pig Version: 0.7.0
I couldn't find the reduce task logs. Where are they generated?
Surprisingly, PIG jobs donot seem to generate any Hadoop (namenode, datanode, tasktracker etc) logs.
-----Original Message-----
From: Dmitriy Ryaboy [mailto:dvryaboy@gmail.com]
Sent: Monday, December 13, 2010 4:51 PM
To: user@pig.apache.org
Subject: Re: ERROR 6015: During execution, encountered a Hadoop error | ERROR 1066: Unable to open iterator for alias grouped_records
Can you send along your script and the reduce task logs?
What version of Pig and Hadoop are you using?
Thanks,
-Dmitriy
On Sun, Dec 12, 2010 at 10:36 PM, <de...@wipro.com> wrote:
> Hi,
>
> I loaded a csv file with about 10 fields into PigStorage and tried to
> do a GROUP BY on one of the fields. The MapReduce job gets created,
> and the Mappers finish execution.
>
> But after that, the job fails with the following error messages:
>
> 2010-12-13 10:31:08,902 [main] INFO
>
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduce
> Launcher
> - 100% complete
> 2010-12-13 10:31:08,902 [main] ERROR
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduce
> Launcher
> - 1 map reduce job(s) failed!
> 2010-12-13 10:31:08,911 [main] ERROR
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduce
> Launcher
> - Failed to produce result in:
> "hdfs://hadoop.namenode:54310/tmp/temp2041073534/tmp-2060206542"
> 2010-12-13 10:31:08,911 [main] INFO
>
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduce
> Launcher
> - Failed!
> 2010-12-13 10:31:08,961 [main] ERROR org.apache.pig.tools.grunt.Grunt
> - ERROR 6015: During execution, encountered a Hadoop error.
> 2010-12-13 10:31:08,961 [main] ERROR org.apache.pig.tools.grunt.Grunt
> -
> org.apache.pig.impl.logicalLayer.FrontendException: ERROR 1066: Unable
> to open iterator for alias grouped_records
> at org.apache.pig.PigServer.openIterator(PigServer.java:521)
> at
> org.apache.pig.tools.grunt.GruntParser.processDump(GruntParser.java:544)
> at
> org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:241)
> 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.backend.executionengine.ExecException: ERROR
> 6015: During execution, encountered a Hadoop error.
> at
> .util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:768)
> at
> .apache.hadoop.mapred.ReduceTask(ReduceCopier$GetMapEventsThread.getMa
> pCompletionEvents(ReduceTask.java:2683)
> Caused by: java.lang.NullPointerException
> ... 2 more
>
> The filter statements (Mapper only) work properly, so it's not that
> nothing is running.
>
> What's the issue here?
>
> Please do not print this email unless it is absolutely necessary.
>
> The information contained in this electronic message and any
> attachments to this message are intended for the exclusive use of the
> addressee(s) and may contain proprietary, confidential or privileged
> information. If you are not the intended recipient, you should not
> disseminate, distribute or copy this e-mail. Please notify the sender
> immediately and destroy all copies of this message and any attachments.
>
> WARNING: Computer viruses can be transmitted via email. The recipient
> should check this email and any attachments for the presence of
> viruses. The company accepts no liability for any damage caused by any
> virus transmitted by this email.
>
> www.wipro.com
>
Please do not print this email unless it is absolutely necessary.
The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the addressee(s) and may contain proprietary, confidential or privileged information. If you are not the intended recipient, you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately and destroy all copies of this message and any attachments.
WARNING: Computer viruses can be transmitted via email. The recipient should check this email and any attachments for the presence of viruses. The company accepts no liability for any damage caused by any virus transmitted by this email.
www.wipro.com
Please do not print this email unless it is absolutely necessary.
The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the addressee(s) and may contain proprietary, confidential or privileged information. If you are not the intended recipient, you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately and destroy all copies of this message and any attachments.
WARNING: Computer viruses can be transmitted via email. The recipient should check this email and any attachments for the presence of viruses. The company accepts no liability for any damage caused by any virus transmitted by this email.
www.wipro.com
Re: ERROR 6015: During execution, encountered a Hadoop error |
ERROR 1066: Unable to open iterator for alias grouped_records
Posted by Thejas M Nair <te...@yahoo-inc.com>.
It seems like a problem with hadoop configuration that is probably not
specific to pig. Are you able to run other MR jobs, such as the wordcount
example ?
I searched for the exception string and found few matches including -
http://mail-archives.apache.org/mod_mbox/hadoop-mapreduce-user/201007.mbox/%
3C441D899DB0E264409344AFC3D1998EEA01229FE6@email4.us.syncsort.com%3E
Thanks,
Thejas
On 12/13/10 6:09 AM, "deepak.n85@wipro.com" <de...@wipro.com> wrote:
> Thanks Thejas,
>
> Reduce Task Logs:
>
> 2010-12-13 18:15:08,340 INFO org.apache.hadoop.metrics.jvm.JvmMetrics:
> Initializing JVM Metrics with processName=SHUFFLE, sessionId= 2010-12-13
> 18:15:09,062 INFO org.apache.hadoop.mapred.ReduceTask: ShuffleRamManager:
> MemoryLimit=141937872, MaxSingleShuffleLimit=35484468 2010-12-13 18:15:09,076
> INFO org.apache.hadoop.mapred.ReduceTask: attempt_201012121200_0018_r_000000_3
> Thread started: Thread for merging on-disk files 2010-12-13 18:15:09,076 INFO
> org.apache.hadoop.mapred.ReduceTask: attempt_201012121200_0018_r_000000_3
> Thread waiting: Thread for merging on-disk files 2010-12-13 18:15:09,081 INFO
> org.apache.hadoop.mapred.ReduceTask: attempt_201012121200_0018_r_000000_3
> Thread started: Thread for merging in memory files 2010-12-13 18:15:09,082
> INFO org.apache.hadoop.mapred.ReduceTask: attempt_201012121200_0018_r_000000_3
> Need another 2 map output(s) where 0 is already in progress 2010-12-13
> 18:15:09,083 INFO org.apache.hadoop.mapred.ReduceTask:
> attempt_201012121200_0018_r_000000_3 Scheduled 0 outputs (0 slow hosts and0
> dup hosts) 2010-12-13 18:15:09,083 INFO org.apache.hadoop.mapred.ReduceTask:
> attempt_201012121200_0018_r_000000_3 Thread started: Thread for polling Map
> Completion Events 2010-12-13 18:15:09,092 FATAL
> org.apache.hadoop.mapred.TaskRunner: attempt_201012121200_0018_r_000000_3
> GetMapEventsThread Ignoring exception : java.lang.NullPointerException at
> java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:768) at
> org.apache.hadoop.mapred.ReduceTask$ReduceCopier$GetMapEventsThread.getMapComp
> letionEvents(ReduceTask.java:2683) at
> org.apache.hadoop.mapred.ReduceTask$ReduceCopier$GetMapEventsThread.run(Reduce
> Task.java:2605) 2010-12-13 18:15:11,389 INFO
> org.apache.hadoop.metrics.jvm.JvmMetrics: Initializing JVM Metrics with
> processName=CLEANUP, sessionId= 2010-12-13 18:15:12,107 INFO
> org.apache.hadoop.mapred.TaskRunner: Runnning cleanup for the task 2010-12-13
> 18:15:12,119 INFO org.apache.hadoop.mapred.TaskRunner:
> Task:attempt_201012121200_0018_r_000000_3 is done. And is in the process of
> commiting 2010-12-13 18:15:12,138 INFO org.apache.hadoop.mapred.TaskRunner:
> Task 'attempt_201012121200_0018_r_000000_3' done.
>
> ________________________________
> From: Thejas M Nair [mailto:tejas@yahoo-inc.com]
> Sent: Monday, December 13, 2010 7:32 PM
> To: user@pig.apache.org; Deepak Choudhary N (WT01 - Product Engineering
> Services)
> Subject: Re: ERROR 6015: During execution, encountered a Hadoop error | ERROR
> 1066: Unable to open iterator for alias grouped_records
>
> From the job tracker web UI, you should be able see the MR job run by this pig
> query. If you follow the links, you should be able to find the reduce task
> logs.
>
> Thanks,
> Thejas
>
>
> On 12/13/10 5:11 AM, "deepak.n85@wipro.com" <de...@wipro.com> wrote:
>
> My Script:
>
> records = LOAD 'hdfs://hadoop.namenode:54310/data' USING PigStorage(',')
> AS (Year:int, Month:int,DayofMonth:int,DayofWeek:int);
> grouped_records = GROUP records BY Month;
> DUMP grouped_records;
>
> Hadoop Version: 0.20.2
> Pig Version: 0.7.0
>
> I couldn't find the reduce task logs. Where are they generated?
>
> Surprisingly, PIG jobs donot seem to generate any Hadoop (namenode, datanode,
> tasktracker etc) logs.
>
>
> -----Original Message-----
> From: Dmitriy Ryaboy [mailto:dvryaboy@gmail.com]
> Sent: Monday, December 13, 2010 4:51 PM
> To: user@pig.apache.org
> Subject: Re: ERROR 6015: During execution, encountered a Hadoop error | ERROR
> 1066: Unable to open iterator for alias grouped_records
>
> Can you send along your script and the reduce task logs?
> What version of Pig and Hadoop are you using?
>
> Thanks,
> -Dmitriy
>
> On Sun, Dec 12, 2010 at 10:36 PM, <de...@wipro.com> wrote:
>
>> Hi,
>>
>> I loaded a csv file with about 10 fields into PigStorage and tried to
>> do a GROUP BY on one of the fields. The MapReduce job gets created,
>> and the Mappers finish execution.
>>
>> But after that, the job fails with the following error messages:
>>
>> 2010-12-13 10:31:08,902 [main] INFO
>>
>> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduce
>> Launcher
>> - 100% complete
>> 2010-12-13 10:31:08,902 [main] ERROR
>> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduce
>> Launcher
>> - 1 map reduce job(s) failed!
>> 2010-12-13 10:31:08,911 [main] ERROR
>> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduce
>> Launcher
>> - Failed to produce result in:
>> "hdfs://hadoop.namenode:54310/tmp/temp2041073534/tmp-2060206542"
>> 2010-12-13 10:31:08,911 [main] INFO
>>
>> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduce
>> Launcher
>> - Failed!
>> 2010-12-13 10:31:08,961 [main] ERROR org.apache.pig.tools.grunt.Grunt
>> - ERROR 6015: During execution, encountered a Hadoop error.
>> 2010-12-13 10:31:08,961 [main] ERROR org.apache.pig.tools.grunt.Grunt
>> -
>> org.apache.pig.impl.logicalLayer.FrontendException: ERROR 1066: Unable
>> to open iterator for alias grouped_records
>> at org.apache.pig.PigServer.openIterator(PigServer.java:521)
>> at
>> org.apache.pig.tools.grunt.GruntParser.processDump(GruntParser.java:544)
>> at
>> org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.j
>> ava:241)
>> 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.backend.executionengine.ExecException: ERROR
>> 6015: During execution, encountered a Hadoop error.
>> at
>> .util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:768)
>> at
>> .apache.hadoop.mapred.ReduceTask(ReduceCopier$GetMapEventsThread.getMa
>> pCompletionEvents(ReduceTask.java:2683)
>> Caused by: java.lang.NullPointerException
>> ... 2 more
>>
>> The filter statements (Mapper only) work properly, so it's not that
>> nothing is running.
>>
>> What's the issue here?
>
> Please do not print this email unless it is absolutely necessary.
>
> The information contained in this electronic message and any attachments to
> this message are intended for the exclusive use of the addressee(s) and may
> contain proprietary, confidential or privileged information. If you are not
> the intended recipient, you should not disseminate, distribute or copy this
> e-mail. Please notify the sender immediately and destroy all copies of this
> message and any attachments.
>
> WARNING: Computer viruses can be transmitted via email. The recipient should
> check this email and any attachments for the presence of viruses. The company
> accepts no liability for any damage caused by any virus transmitted by this
> email.
>
> www.wipro.com
>
RE: ERROR 6015: During execution, encountered a Hadoop error |
ERROR 1066: Unable to open iterator for alias grouped_records
Posted by de...@wipro.com.
Thanks Thejas,
Reduce Task Logs:
2010-12-13 18:15:08,340 INFO org.apache.hadoop.metrics.jvm.JvmMetrics: Initializing JVM Metrics with processName=SHUFFLE, sessionId= 2010-12-13 18:15:09,062 INFO org.apache.hadoop.mapred.ReduceTask: ShuffleRamManager: MemoryLimit=141937872, MaxSingleShuffleLimit=35484468 2010-12-13 18:15:09,076 INFO org.apache.hadoop.mapred.ReduceTask: attempt_201012121200_0018_r_000000_3 Thread started: Thread for merging on-disk files 2010-12-13 18:15:09,076 INFO org.apache.hadoop.mapred.ReduceTask: attempt_201012121200_0018_r_000000_3 Thread waiting: Thread for merging on-disk files 2010-12-13 18:15:09,081 INFO org.apache.hadoop.mapred.ReduceTask: attempt_201012121200_0018_r_000000_3 Thread started: Thread for merging in memory files 2010-12-13 18:15:09,082 INFO org.apache.hadoop.mapred.ReduceTask: attempt_201012121200_0018_r_000000_3 Need another 2 map output(s) where 0 is already in progress 2010-12-13 18:15:09,083 INFO org.apache.hadoop.mapred.ReduceTask: attempt_201012121200_0018_r_000000_3 Scheduled 0 outputs (0 slow hosts and0 dup hosts) 2010-12-13 18:15:09,083 INFO org.apache.hadoop.mapred.ReduceTask: attempt_201012121200_0018_r_000000_3 Thread started: Thread for polling Map Completion Events 2010-12-13 18:15:09,092 FATAL org.apache.hadoop.mapred.TaskRunner: attempt_201012121200_0018_r_000000_3 GetMapEventsThread Ignoring exception : java.lang.NullPointerException at java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:768) at org.apache.hadoop.mapred.ReduceTask$ReduceCopier$GetMapEventsThread.getMapCompletionEvents(ReduceTask.java:2683) at org.apache.hadoop.mapred.ReduceTask$ReduceCopier$GetMapEventsThread.run(ReduceTask.java:2605) 2010-12-13 18:15:11,389 INFO org.apache.hadoop.metrics.jvm.JvmMetrics: Initializing JVM Metrics with processName=CLEANUP, sessionId= 2010-12-13 18:15:12,107 INFO org.apache.hadoop.mapred.TaskRunner: Runnning cleanup for the task 2010-12-13 18:15:12,119 INFO org.apache.hadoop.mapred.TaskRunner: Task:attempt_201012121200_0018_r_000000_3 is done. And is in the process of commiting 2010-12-13 18:15:12,138 INFO org.apache.hadoop.mapred.TaskRunner: Task 'attempt_201012121200_0018_r_000000_3' done.
________________________________
From: Thejas M Nair [mailto:tejas@yahoo-inc.com]
Sent: Monday, December 13, 2010 7:32 PM
To: user@pig.apache.org; Deepak Choudhary N (WT01 - Product Engineering Services)
Subject: Re: ERROR 6015: During execution, encountered a Hadoop error | ERROR 1066: Unable to open iterator for alias grouped_records
>From the job tracker web UI, you should be able see the MR job run by this pig query. If you follow the links, you should be able to find the reduce task logs.
Thanks,
Thejas
On 12/13/10 5:11 AM, "deepak.n85@wipro.com" <de...@wipro.com> wrote:
My Script:
records = LOAD 'hdfs://hadoop.namenode:54310/data' USING PigStorage(',')
AS (Year:int, Month:int,DayofMonth:int,DayofWeek:int);
grouped_records = GROUP records BY Month;
DUMP grouped_records;
Hadoop Version: 0.20.2
Pig Version: 0.7.0
I couldn't find the reduce task logs. Where are they generated?
Surprisingly, PIG jobs donot seem to generate any Hadoop (namenode, datanode, tasktracker etc) logs.
-----Original Message-----
From: Dmitriy Ryaboy [mailto:dvryaboy@gmail.com]
Sent: Monday, December 13, 2010 4:51 PM
To: user@pig.apache.org
Subject: Re: ERROR 6015: During execution, encountered a Hadoop error | ERROR 1066: Unable to open iterator for alias grouped_records
Can you send along your script and the reduce task logs?
What version of Pig and Hadoop are you using?
Thanks,
-Dmitriy
On Sun, Dec 12, 2010 at 10:36 PM, <de...@wipro.com> wrote:
> Hi,
>
> I loaded a csv file with about 10 fields into PigStorage and tried to
> do a GROUP BY on one of the fields. The MapReduce job gets created,
> and the Mappers finish execution.
>
> But after that, the job fails with the following error messages:
>
> 2010-12-13 10:31:08,902 [main] INFO
>
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduce
> Launcher
> - 100% complete
> 2010-12-13 10:31:08,902 [main] ERROR
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduce
> Launcher
> - 1 map reduce job(s) failed!
> 2010-12-13 10:31:08,911 [main] ERROR
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduce
> Launcher
> - Failed to produce result in:
> "hdfs://hadoop.namenode:54310/tmp/temp2041073534/tmp-2060206542"
> 2010-12-13 10:31:08,911 [main] INFO
>
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduce
> Launcher
> - Failed!
> 2010-12-13 10:31:08,961 [main] ERROR org.apache.pig.tools.grunt.Grunt
> - ERROR 6015: During execution, encountered a Hadoop error.
> 2010-12-13 10:31:08,961 [main] ERROR org.apache.pig.tools.grunt.Grunt
> -
> org.apache.pig.impl.logicalLayer.FrontendException: ERROR 1066: Unable
> to open iterator for alias grouped_records
> at org.apache.pig.PigServer.openIterator(PigServer.java:521)
> at
> org.apache.pig.tools.grunt.GruntParser.processDump(GruntParser.java:544)
> at
> org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:241)
> 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.backend.executionengine.ExecException: ERROR
> 6015: During execution, encountered a Hadoop error.
> at
> .util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:768)
> at
> .apache.hadoop.mapred.ReduceTask(ReduceCopier$GetMapEventsThread.getMa
> pCompletionEvents(ReduceTask.java:2683)
> Caused by: java.lang.NullPointerException
> ... 2 more
>
> The filter statements (Mapper only) work properly, so it's not that
> nothing is running.
>
> What's the issue here?
Please do not print this email unless it is absolutely necessary.
The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the addressee(s) and may contain proprietary, confidential or privileged information. If you are not the intended recipient, you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately and destroy all copies of this message and any attachments.
WARNING: Computer viruses can be transmitted via email. The recipient should check this email and any attachments for the presence of viruses. The company accepts no liability for any damage caused by any virus transmitted by this email.
www.wipro.com
Re: ERROR 6015: During execution, encountered a Hadoop error |
ERROR 1066: Unable to open iterator for alias grouped_records
Posted by Thejas M Nair <te...@yahoo-inc.com>.
>From the job tracker web UI, you should be able see the MR job run by this pig query. If you follow the links, you should be able to find the reduce task logs.
Thanks,
Thejas
On 12/13/10 5:11 AM, "deepak.n85@wipro.com" <de...@wipro.com> wrote:
My Script:
records = LOAD 'hdfs://hadoop.namenode:54310/data' USING PigStorage(',')
AS (Year:int, Month:int,DayofMonth:int,DayofWeek:int);
grouped_records = GROUP records BY Month;
DUMP grouped_records;
Hadoop Version: 0.20.2
Pig Version: 0.7.0
I couldn't find the reduce task logs. Where are they generated?
Surprisingly, PIG jobs donot seem to generate any Hadoop (namenode, datanode, tasktracker etc) logs.
-----Original Message-----
From: Dmitriy Ryaboy [mailto:dvryaboy@gmail.com]
Sent: Monday, December 13, 2010 4:51 PM
To: user@pig.apache.org
Subject: Re: ERROR 6015: During execution, encountered a Hadoop error | ERROR 1066: Unable to open iterator for alias grouped_records
Can you send along your script and the reduce task logs?
What version of Pig and Hadoop are you using?
Thanks,
-Dmitriy
On Sun, Dec 12, 2010 at 10:36 PM, <de...@wipro.com> wrote:
> Hi,
>
> I loaded a csv file with about 10 fields into PigStorage and tried to
> do a GROUP BY on one of the fields. The MapReduce job gets created,
> and the Mappers finish execution.
>
> But after that, the job fails with the following error messages:
>
> 2010-12-13 10:31:08,902 [main] INFO
>
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduce
> Launcher
> - 100% complete
> 2010-12-13 10:31:08,902 [main] ERROR
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduce
> Launcher
> - 1 map reduce job(s) failed!
> 2010-12-13 10:31:08,911 [main] ERROR
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduce
> Launcher
> - Failed to produce result in:
> "hdfs://hadoop.namenode:54310/tmp/temp2041073534/tmp-2060206542"
> 2010-12-13 10:31:08,911 [main] INFO
>
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduce
> Launcher
> - Failed!
> 2010-12-13 10:31:08,961 [main] ERROR org.apache.pig.tools.grunt.Grunt
> - ERROR 6015: During execution, encountered a Hadoop error.
> 2010-12-13 10:31:08,961 [main] ERROR org.apache.pig.tools.grunt.Grunt
> -
> org.apache.pig.impl.logicalLayer.FrontendException: ERROR 1066: Unable
> to open iterator for alias grouped_records
> at org.apache.pig.PigServer.openIterator(PigServer.java:521)
> at
> org.apache.pig.tools.grunt.GruntParser.processDump(GruntParser.java:544)
> at
> org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:241)
> 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.backend.executionengine.ExecException: ERROR
> 6015: During execution, encountered a Hadoop error.
> at
> .util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:768)
> at
> .apache.hadoop.mapred.ReduceTask(ReduceCopier$GetMapEventsThread.getMa
> pCompletionEvents(ReduceTask.java:2683)
> Caused by: java.lang.NullPointerException
> ... 2 more
>
> The filter statements (Mapper only) work properly, so it's not that
> nothing is running.
>
> What's the issue here?
>
> Please do not print this email unless it is absolutely necessary.
>
> The information contained in this electronic message and any
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> www.wipro.com
>
Please do not print this email unless it is absolutely necessary.
The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the addressee(s) and may contain proprietary, confidential or privileged information. If you are not the intended recipient, you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately and destroy all copies of this message and any attachments.
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RE: ERROR 6015: During execution, encountered a Hadoop error |
ERROR 1066: Unable to open iterator for alias grouped_records
Posted by de...@wipro.com.
My Script:
records = LOAD 'hdfs://hadoop.namenode:54310/data' USING PigStorage(',')
AS (Year:int, Month:int,DayofMonth:int,DayofWeek:int);
grouped_records = GROUP records BY Month;
DUMP grouped_records;
Hadoop Version: 0.20.2
Pig Version: 0.7.0
I couldn't find the reduce task logs. Where are they generated?
Surprisingly, PIG jobs donot seem to generate any Hadoop (namenode, datanode, tasktracker etc) logs.
-----Original Message-----
From: Dmitriy Ryaboy [mailto:dvryaboy@gmail.com]
Sent: Monday, December 13, 2010 4:51 PM
To: user@pig.apache.org
Subject: Re: ERROR 6015: During execution, encountered a Hadoop error | ERROR 1066: Unable to open iterator for alias grouped_records
Can you send along your script and the reduce task logs?
What version of Pig and Hadoop are you using?
Thanks,
-Dmitriy
On Sun, Dec 12, 2010 at 10:36 PM, <de...@wipro.com> wrote:
> Hi,
>
> I loaded a csv file with about 10 fields into PigStorage and tried to
> do a GROUP BY on one of the fields. The MapReduce job gets created,
> and the Mappers finish execution.
>
> But after that, the job fails with the following error messages:
>
> 2010-12-13 10:31:08,902 [main] INFO
>
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduce
> Launcher
> - 100% complete
> 2010-12-13 10:31:08,902 [main] ERROR
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduce
> Launcher
> - 1 map reduce job(s) failed!
> 2010-12-13 10:31:08,911 [main] ERROR
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduce
> Launcher
> - Failed to produce result in:
> "hdfs://hadoop.namenode:54310/tmp/temp2041073534/tmp-2060206542"
> 2010-12-13 10:31:08,911 [main] INFO
>
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduce
> Launcher
> - Failed!
> 2010-12-13 10:31:08,961 [main] ERROR org.apache.pig.tools.grunt.Grunt
> - ERROR 6015: During execution, encountered a Hadoop error.
> 2010-12-13 10:31:08,961 [main] ERROR org.apache.pig.tools.grunt.Grunt
> -
> org.apache.pig.impl.logicalLayer.FrontendException: ERROR 1066: Unable
> to open iterator for alias grouped_records
> at org.apache.pig.PigServer.openIterator(PigServer.java:521)
> at
> org.apache.pig.tools.grunt.GruntParser.processDump(GruntParser.java:544)
> at
> org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:241)
> 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.backend.executionengine.ExecException: ERROR
> 6015: During execution, encountered a Hadoop error.
> at
> .util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:768)
> at
> .apache.hadoop.mapred.ReduceTask(ReduceCopier$GetMapEventsThread.getMa
> pCompletionEvents(ReduceTask.java:2683)
> Caused by: java.lang.NullPointerException
> ... 2 more
>
> The filter statements (Mapper only) work properly, so it's not that
> nothing is running.
>
> What's the issue here?
>
> Please do not print this email unless it is absolutely necessary.
>
> The information contained in this electronic message and any
> attachments to this message are intended for the exclusive use of the
> addressee(s) and may contain proprietary, confidential or privileged
> information. If you are not the intended recipient, you should not
> disseminate, distribute or copy this e-mail. Please notify the sender
> immediately and destroy all copies of this message and any attachments.
>
> WARNING: Computer viruses can be transmitted via email. The recipient
> should check this email and any attachments for the presence of
> viruses. The company accepts no liability for any damage caused by any
> virus transmitted by this email.
>
> www.wipro.com
>
Please do not print this email unless it is absolutely necessary.
The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the addressee(s) and may contain proprietary, confidential or privileged information. If you are not the intended recipient, you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately and destroy all copies of this message and any attachments.
WARNING: Computer viruses can be transmitted via email. The recipient should check this email and any attachments for the presence of viruses. The company accepts no liability for any damage caused by any virus transmitted by this email.
www.wipro.com
Re: ERROR 6015: During execution, encountered a Hadoop error | ERROR
1066: Unable to open iterator for alias grouped_records
Posted by Dmitriy Ryaboy <dv...@gmail.com>.
Can you send along your script and the reduce task logs?
What version of Pig and Hadoop are you using?
Thanks,
-Dmitriy
On Sun, Dec 12, 2010 at 10:36 PM, <de...@wipro.com> wrote:
> Hi,
>
> I loaded a csv file with about 10 fields into PigStorage and tried to do a
> GROUP BY on one of the fields. The MapReduce job gets created, and the
> Mappers finish execution.
>
> But after that, the job fails with the following error messages:
>
> 2010-12-13 10:31:08,902 [main] INFO
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher
> - 100% complete
> 2010-12-13 10:31:08,902 [main] ERROR
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher
> - 1 map reduce job(s) failed!
> 2010-12-13 10:31:08,911 [main] ERROR
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher
> - Failed to produce result in:
> "hdfs://hadoop.namenode:54310/tmp/temp2041073534/tmp-2060206542"
> 2010-12-13 10:31:08,911 [main] INFO
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher
> - Failed!
> 2010-12-13 10:31:08,961 [main] ERROR org.apache.pig.tools.grunt.Grunt -
> ERROR 6015: During execution, encountered a Hadoop error.
> 2010-12-13 10:31:08,961 [main] ERROR org.apache.pig.tools.grunt.Grunt -
> org.apache.pig.impl.logicalLayer.FrontendException: ERROR 1066: Unable to
> open iterator for alias grouped_records
> at org.apache.pig.PigServer.openIterator(PigServer.java:521)
> at
> org.apache.pig.tools.grunt.GruntParser.processDump(GruntParser.java:544)
> at
> org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:241)
> 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.backend.executionengine.ExecException: ERROR
> 6015: During execution, encountered a Hadoop error.
> at
> .util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:768)
> at
> .apache.hadoop.mapred.ReduceTask(ReduceCopier$GetMapEventsThread.getMapCompletionEvents(ReduceTask.java:2683)
> Caused by: java.lang.NullPointerException
> ... 2 more
>
> The filter statements (Mapper only) work properly, so it's not that nothing
> is running.
>
> What's the issue here?
>
> Please do not print this email unless it is absolutely necessary.
>
> The information contained in this electronic message and any attachments to
> this message are intended for the exclusive use of the addressee(s) and may
> contain proprietary, confidential or privileged information. If you are not
> the intended recipient, you should not disseminate, distribute or copy this
> e-mail. Please notify the sender immediately and destroy all copies of this
> message and any attachments.
>
> WARNING: Computer viruses can be transmitted via email. The recipient
> should check this email and any attachments for the presence of viruses. The
> company accepts no liability for any damage caused by any virus transmitted
> by this email.
>
> www.wipro.com
>