doDF frequently brings process down due to lack of memory
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Key: HADOOP-2670
URL: https://issues.apache.org/jira/browse/HADOOP-2670
Project: Hadoop
Issue Type: Bug
Components: dfs
Affects Versions: 0.14.4
Reporter: Joydeep Sen Sarma
we are running with -Xmx 1024M. Every once in a while, we see tasks failing
because of:
java.io.IOException: java.io.IOException: Cannot allocate memory
at java.lang.UNIXProcess.(UNIXProcess.java:148)
at java.lang.ProcessImpl.start(ProcessImpl.java:65)
at java.lang.ProcessBuilder.start(ProcessBuilder.java:451)
at java.lang.Runtime.exec(Runtime.java:591)
at java.lang.Runtime.exec(Runtime.java:464)
at org.apache.hadoop.fs.DF.doDF(DF.java:60)
at org.apache.hadoop.fs.DF.getAvailable(DF.java:99)
at
org.apache.hadoop.fs.LocalDirAllocator$AllocatorPerContext.getLocalPathForWrite(LocalDirAllocator.java:259)
at
org.apache.hadoop.fs.LocalDirAllocator$AllocatorPerContext.createTmpFileForWrite(LocalDirAllocator.java:289)
at
org.apache.hadoop.fs.LocalDirAllocator.createTmpFileForWrite(LocalDirAllocator.java:155)
at
org.apache.hadoop.dfs.DFSClient$DFSOutputStream.newBackupFile(DFSClient.java:1475)
at
org.apache.hadoop.dfs.DFSClient$DFSOutputStream.openBackupStream(DFSClient.java:1442)
at
org.apache.hadoop.dfs.DFSClient$DFSOutputStream.writeChunk(DFSClient.java:1600)
at
org.apache.hadoop.fs.FSOutputSummer.writeChecksumChunk(FSOutputSummer.java:140)
at
org.apache.hadoop.fs.FSOutputSummer.flushBuffer(FSOutputSummer.java:122)
at org.apache.hadoop.fs.FSOutputSummer.write1(FSOutputSummer.java:112)
at org.apache.hadoop.fs.FSOutputSummer.write(FSOutputSummer.java:86)
at
org.apache.hadoop.fs.FSDataOutputStream$PositionCache.write(FSDataOutputStream.java:39)
at java.io.DataOutputStream.write(DataOutputStream.java:90)
at
org.apache.hadoop.io.SequenceFile$Writer.append(SequenceFile.java:822)
at
org.apache.hadoop.mapred.SequenceFileOutputFormat$1.write(SequenceFileOutputFormat.java:69)
at org.apache.hadoop.mapred.ReduceTask$2.collect(ReduceTask.java:304)
at
com.facebook.hive.streaming.HiveJoin$JoinReduce.reduce(HiveJoin.java:546)
at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:322)
at
org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:1743)
when the task re-runs - it succeeds. it seems like that this is an edge case
where the garbage collector needs to be run before trying to spawn external
process. (going to try it out). any other ideas?
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