Details
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Bug
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Status: Patch Available
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Critical
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Resolution: Unresolved
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1.2.0, 1.3.0, 1.4.0
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None
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None
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HDFS Sink memory usage best practices.
Description
We run a 3 node/1 collector test cluster pushing about 350events/sec per node... Not really high stress, but just something to evaluate flume with.
Consistently our collector has been dying because of an OOMError killing the SinkRunner after running for about 30-40 hours(seems pretty consistent as we've had it 3 times now).
Suspected cause would be a memory leak somewhere in HdfsSink. The feeder nodes which run AvroSink instead of HdfsSink have been up and running for about a week without restarts.
flume-load/act-wap02/2012-06-26-17.1340697637324.tmp, packetSize=65557, chunksPerPacket=127, bytesCurBlock=29731328
java.lang.OutOfMemoryError: GC overhead limit exceeded
2012-06-26 17:12:56,080 (SinkRunner-PollingRunner-DefaultSinkProcessor) [ERROR - org.apache.flume.sink.hdfs.HDFSEventSink.process(HDFSEventSink.java:411)] process failed
java.lang.OutOfMemoryError: GC overhead limit exceeded
at java.util.Arrays.copyOfRange(Arrays.java:3209)
at java.lang.String.<init>(String.java:215)
at java.lang.StringBuilder.toString(StringBuilder.java:430)
at org.apache.flume.formatter.output.BucketPath.escapeString(BucketPath.java:306)
at org.apache.flume.sink.hdfs.HDFSEventSink.process(HDFSEventSink.java:367)
at org.apache.flume.sink.DefaultSinkProcessor.process(DefaultSinkProcessor.java:68)
at org.apache.flume.SinkRunner$PollingRunner.run(SinkRunner.java:147)
at java.lang.Thread.run(Thread.java:619)
Exception in thread "SinkRunner-PollingRunner-DefaultSinkProcessor" java.lang.OutOfMemoryError: GC overhead limit exceeded
at java.util.Arrays.copyOfRange(Arrays.java:3209)
at java.lang.String.<init>(String.java:215)
at java.lang.StringBuilder.toString(StringBuilder.java:430)
at org.apache.flume.formatter.output.BucketPath.escapeString(BucketPath.java:306)
at org.apache.flume.sink.hdfs.HDFSEventSink.process(HDFSEventSink.java:367)
at org.apache.flume.sink.DefaultSinkProcessor.process(DefaultSinkProcessor.java:68)
at org.apache.flume.SinkRunner$PollingRunner.run(SinkRunner.java:147)
at java.lang.Thread.run(Thread.java:619)