FAQ

Santiago Pérez wrote:
Hej

I am running an aplication based on Nutch in a cluster with 1 master and 6
slaves in Amazon (with the same instances for all of them with 1.7GB RAM
memory)
.
2010-02-10 03:18:31,463 WARN mapred.TaskTracker - Error running child
java.io.IOException: Spill failed
at
org.apache.hadoop.mapred.MapTask$MapOutputBuffer.flush(MapTask.java:1085)
at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:359)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:307)
at org.apache.hadoop.mapred.Child.main(Child.java:170)
Caused by: java.io.IOException: Cannot run program "bash":
java.io.IOException: error=12, Cannot allocate memory
at java.lang.ProcessBuilder.start(ProcessBuilder.java:459)
at org.apache.hadoop.util.Shell.runCommand(Shell.java:149)
at org.apache.hadoop.util.Shell.run(Shell.java:134)
at org.apache.hadoop.fs.DF.getAvailable(DF.java:73)
at
org.apache.hadoop.fs.LocalDirAllocator$AllocatorPerContext.getLocalPathForWrite(LocalDirAllocator.java:329)
at
org.apache.hadoop.fs.LocalDirAllocator.getLocalPathForWrite(LocalDirAllocator.java:124)
at
org.apache.hadoop.mapred.MapOutputFile.getSpillFileForWrite(MapOutputFile.java:107)
at
org.apache.hadoop.mapred.MapTask$MapOutputBuffer.sortAndSpill(MapTask.java:1183)
at
org.apache.hadoop.mapred.MapTask$MapOutputBuffer.access$1800(MapTask.java:648)
at
org.apache.hadoop.mapred.MapTask$MapOutputBuffer$SpillThread.run(MapTask.java:1135)
Caused by: java.io.IOException: java.io.IOException: error=12, Cannot
allocate memory
at java.lang.UNIXProcess.<init>(UNIXProcess.java:148)
at java.lang.ProcessImpl.start(ProcessImpl.java:65)
at java.lang.ProcessBuilder.start(ProcessBuilder.java:452)
... 9 more
The classic JVM fork failure? If so, give your TT less memory, so
forking becomes cheaper

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groupcommon-dev @
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postedFeb 10, '10 at 8:54a
activeFeb 10, '10 at 11:13a
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Steve Loughran: 1 post Santiago Pérez: 1 post

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