Thanks Amogh. The platform that I got this error is mac os x and hadoop 0.20.1.
All native library installed except lzo (which will report that codec not
found). But I didn't see this error when I ran the same thing w/o expression
specified, in addition I also ran sth with the same expression setting on
Fedora 8 and 0.19.1 without any problem. So, I think it might depends on some
other settings (wrt what spill is about).
Thanks,
Michael
--- On Mon, 2/22/10, Amogh Vasekar <am...@yahoo-inc.com> wrote:
From: Amogh Vasekar <am...@yahoo-inc.com>
Subject: Re: java.io.IOException: Spill failed when using w/ GzipCodec for Map
output
To: "common-user@hadoop.apache.org" <common-user@hadoop.apache.org>
Date: Monday, February 22, 2010, 11:27 PM
Hi,
Can you please let us know what platform you are running on your hadoop
machines?
For gzip and lzo to work, you need supported hadoop native libraries ( I
remember reading on this somewhere in hadoop wiki :) )
Amogh
On 2/23/10 8:16 AM, "jiang licht" <licht_ji...@yahoo.com> wrote:
I have a pig script. If I don't set any codec for Map output for hadoop
cluster, no problem. Now I made the following compression settings, the job
failed and the error message is shown below. I guess there are some other
settings that should be correctly set together with using the compression. Im
using 0.20.1. Any thoughts? Thanks for your help!
mapred-site.xml
<property>
<name>mapred.compress.map.output</name>
<value>true</value>
</property>
<property>
<name>mapred.map.output.compression.codec</name>
<value>org.apache.hadoop.io.compress.GzipCodec</value>
</property>
error message of failed map task--->
java.io.IOException: Spill failed
at
org.apache.hadoop.mapred.MapTask$MapOutputBuffer.collect(MapTask.java:822)
at
org.apache.hadoop.mapred.MapTask$OldOutputCollector.collect(MapTask.java:466)
at
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapReduce$Map.collect(PigMapReduce.java:108)
at
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapBase.runPipeline(PigMapBase.java:251)
at
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapBase.map(PigMapBase.java:240)
at
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapReduce$Map.map(PigMapReduce.java:93)
at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:50)
at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:358)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:307)
at org.apache.hadoop.mapred.Child.main(Child.java:170)
Caused by: java.lang.NullPointerException
at org.apache.hadoop.mapred.IFile$Writer.(IFile.java:102)
at
org.apache.hadoop.mapred.MapTask$MapOutputBuffer.sortAndSpill(MapTask.java:1198)
at
org.apache.hadoop.mapred.MapTask$MapOutputBuffer.access$1800(MapTask.java:648)
at
org.apache.hadoop.mapred.MapTask$MapOutputBuffer$SpillThread.run(MapTask.java:1135)
Thanks,
Michael
