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From praveenesh kumar <praveen...@gmail.com>
Subject Re: java.lang.OutOfMemoryError: Java heap space
Date Thu, 06 Feb 2014 19:54:56 GMT
Its a normal join. I can't use replicated join, as the data is very large.

Regards
Prav


On Thu, Feb 6, 2014 at 7:52 PM, abhishek <abhishek.dodda1@gmail.com> wrote:

> Hi Praveenesh,
>
> Did you use "replicated join" in your pig script or is it a regular join ??
>
> Regards
> Abhishek
>
> Sent from my iPhone
>
> > On Feb 6, 2014, at 11:25 AM, praveenesh kumar <praveenesh@gmail.com>
> wrote:
> >
> > Hi all,
> >
> > I am running a Pig Script which is running fine for small data. But when
> I
> > scale the data, I am getting the following error at my map stage.
> > Please refer to the map logs as below.
> >
> > My Pig script is doing a group by first, followed by a join on the
> grouped
> > data.
> >
> >
> > Any clues to understand where I should look at or how shall I deal with
> > this situation. I don't want to just go by just increasing the heap
> space.
> > My map jvm heap space is already 3 GB with io.sort.mb = 768 MB.
> >
> > 2014-02-06 19:15:12,243 WARN org.apache.hadoop.util.NativeCodeLoader:
> > Unable to load native-hadoop library for your platform... using
> > builtin-java classes where applicable 2014-02-06 19:15:15,025 INFO
> > org.apache.hadoop.util.ProcessTree: setsid exited with exit code 0
> > 2014-02-06 19:15:15,123 INFO org.apache.hadoop.mapred.Task: Using
> > ResourceCalculatorPlugin :
> > org.apache.hadoop.util.LinuxResourceCalculatorPlugin@2bd9e282 2014-02-06
> > 19:15:15,546 INFO org.apache.hadoop.mapred.MapTask: io.sort.mb = 768
> > 2014-02-06 19:15:19,846 INFO org.apache.hadoop.mapred.MapTask: data
> buffer
> > = 612032832/644245088 2014-02-06 19:15:19,846 INFO
> > org.apache.hadoop.mapred.MapTask: record buffer = 9563013/10066330
> > 2014-02-06 19:15:20,037 INFO org.apache.hadoop.io.compress.CodecPool: Got
> > brand-new decompressor 2014-02-06 19:15:21,083 INFO
> >
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigRecordReader:
> > Created input record counter: Input records from _1_tmp1327641329
> > 2014-02-06 19:15:52,894 INFO org.apache.hadoop.mapred.MapTask: Spilling
> map
> > output: buffer full= true 2014-02-06 19:15:52,895 INFO
> > org.apache.hadoop.mapred.MapTask: bufstart = 0; bufend = 611949600;
> bufvoid
> > = 644245088 2014-02-06 19:15:52,895 INFO
> org.apache.hadoop.mapred.MapTask:
> > kvstart = 0; kvend = 576; length = 10066330 2014-02-06 19:16:06,182 INFO
> > org.apache.hadoop.mapred.MapTask: Finished spill 0 2014-02-06
> 19:16:16,169
> > INFO org.apache.pig.impl.util.SpillableMemoryManager: first memory
> handler
> > call - Collection threshold init = 328728576(321024K) used =
> > 1175055104(1147514K) committed = 1770848256(1729344K) max =
> > 2097152000(2048000K) 2014-02-06 19:16:20,446 INFO
> > org.apache.pig.impl.util.SpillableMemoryManager: Spilled an estimate of
> > 308540402 bytes from 1 objects. init = 328728576(321024K) used =
> > 1175055104(1147514K) committed = 1770848256(1729344K) max =
> > 2097152000(2048000K) 2014-02-06 19:17:22,246 INFO
> > org.apache.pig.impl.util.SpillableMemoryManager: first memory handler
> call-
> > Usage threshold init = 328728576(321024K) used = 1768466512(1727018K)
> > committed = 1770848256(1729344K) max = 2097152000(2048000K) 2014-02-06
> > 19:17:35,597 INFO org.apache.pig.impl.util.SpillableMemoryManager:
> Spilled
> > an estimate of 1073462600 bytes from 1 objects. init = 328728576(321024K)
> > used = 1768466512(1727018K) committed = 1770848256(1729344K) max =
> > 2097152000(2048000K) 2014-02-06 19:18:01,276 INFO
> > org.apache.hadoop.mapred.MapTask: Spilling map output: buffer full= true
> > 2014-02-06 19:18:01,288 INFO org.apache.hadoop.mapred.MapTask: bufstart =
> > 611949600; bufend = 52332788; bufvoid = 644245088 2014-02-06 19:18:01,288
> > INFO org.apache.hadoop.mapred.MapTask: kvstart = 576; kvend = 777;
> length =
> > 10066330 2014-02-06 19:18:03,377 INFO org.apache.hadoop.mapred.MapTask:
> > Finished spill 1 2014-02-06 19:18:05,494 INFO
> > org.apache.hadoop.mapred.MapTask: Record too large for in-memory buffer:
> > 644246693 bytes 2014-02-06 19:18:36,008 INFO
> > org.apache.pig.impl.util.SpillableMemoryManager: Spilled an estimate of
> > 306271368 bytes from 1 objects. init = 328728576(321024K) used =
> > 1449267128(1415299K) committed = 2097152000(2048000K) max =
> > 2097152000(2048000K) 2014-02-06 19:18:44,448 INFO
> > org.apache.hadoop.mapred.TaskLogsTruncater: Initializing logs' truncater
> > with mapRetainSize=-1 and reduceRetainSize=-1 2014-02-06 19:18:44,780
> FATAL
> > org.apache.hadoop.mapred.Child: Error running child :
> > java.lang.OutOfMemoryError: Java heap space at
> > java.util.Arrays.copyOf(Arrays.java:2786) at
> > java.io.ByteArrayOutputStream.write(ByteArrayOutputStream.java:94) at
> > java.io.DataOutputStream.write(DataOutputStream.java:90) at
> > java.io.DataOutputStream.writeUTF(DataOutputStream.java:384) at
> > java.io.DataOutputStream.writeUTF(DataOutputStream.java:306) at
> > org.apache.pig.data.BinInterSedes.writeDatum(BinInterSedes.java:454) at
> > org.apache.pig.data.BinInterSedes.writeTuple(BinInterSedes.java:542) at
> > org.apache.pig.data.BinInterSedes.writeBag(BinInterSedes.java:523) at
> > org.apache.pig.data.BinInterSedes.writeDatum(BinInterSedes.java:361) at
> > org.apache.pig.data.BinInterSedes.writeTuple(BinInterSedes.java:542) at
> > org.apache.pig.data.BinInterSedes.writeDatum(BinInterSedes.java:357) at
> > org.apache.pig.data.BinSedesTuple.write(BinSedesTuple.java:57) at
> >
> org.apache.pig.impl.io.PigNullableWritable.write(PigNullableWritable.java:123)
> > at
> >
> org.apache.hadoop.io.serializer.WritableSerialization$WritableSerializer.serialize(WritableSerialization.java:90)
> > at
> >
> org.apache.hadoop.io.serializer.WritableSerialization$WritableSerializer.serialize(WritableSerialization.java:77)
> > at org.apache.hadoop.mapred.IFile$Writer.append(IFile.java:179) at
> >
> org.apache.hadoop.mapred.MapTask$MapOutputBuffer.spillSingleRecord(MapTask.java:1501)
> > at
> >
> org.apache.hadoop.mapred.MapTask$MapOutputBuffer.collect(MapTask.java:1091)
> > at
> >
> org.apache.hadoop.mapred.MapTask$NewOutputCollector.write(MapTask.java:691)
> > at
> >
> org.apache.hadoop.mapreduce.TaskInputOutputContext.write(TaskInputOutputContext.java:80)
> > at
> >
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigGenericMapReduce$Map.collect(PigGenericMapReduce.java:128)
> > at
> >
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigGenericMapBase.runPipeline(PigGenericMapBase.java:269)
> > at
> >
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigGenericMapBase.map(PigGenericMapBase.java:262)
> > at
> >
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigGenericMapBase.map(PigGenericMapBase.java:64)
> > at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:144) at
> > org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:764) at
> > org.apache.hadoop.mapred.MapTask.run(MapTask.java:370) at
> > org.apache.hadoop.mapred.Child$4.run(Child.java:255) at
> > java.security.AccessController.doPrivileged(Native Method) at
> > javax.security.auth.Subject.doAs(Subject.java:396) at
> >
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1121)
> > at org.apache.hadoop.mapred.Child.main(Child.java:249)
>

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