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Flume, mail # user - Error while writing to HDFS
Cameron Gandevia
2012-11-06, 02:43
Brock Noland
2012-11-06, 13:00
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Re: Error while writing to HDFS
Cameron Gandevia 2012-11-06, 18:45
Thanks for the reply, it looks like the cause was our DataNodes throwing
the following exception

java.io.IOException: xceiverCount 2050 exceeds the limit of concurrent
xcievers 2048

I upgraded this setting and now everything seems to run correctly.
On Tue, Nov 6, 2012 at 5:00 AM, Brock Noland <[EMAIL PROTECTED]> wrote:

> Regarding the EOFException my guess is that some nodes are acting
> flaky. What version of hadoop are you running?
>
> Brock
>
> On Mon, Nov 5, 2012 at 8:43 PM, Cameron Gandevia <[EMAIL PROTECTED]>
> wrote:
> > Hi
> >
> > I starting noticing the following error on our flume nodes and was
> wondering
> > if anyone had any ideas. I am still trying to figure out if its related
> to
> > something happening in our Hadoop cluster.
> >
> > I am running about 20 of the following sink configurations
> >
> > ${FLUME_COLLECTOR_ID}.sinks.hdfs-sink20.type = hdfs
> > ${FLUME_COLLECTOR_ID}.sinks.hdfs-sink20.hdfs.path > > hdfs://${HADOOP_NAMENODE}:8020/rawLogs/%Y-%m-%d/%H00
> > ${FLUME_COLLECTOR_ID}.sinks.hdfs-sink20.hdfs.codeC > > com.hadoop.compression.lzo.LzopCodec
> > ${FLUME_COLLECTOR_ID}.sinks.hdfs-sink20.hdfs.fileType = CompressedStream
> > ${FLUME_COLLECTOR_ID}.sinks.hdfs-sink20.hdfs.rollInterval = 300
> > ${FLUME_COLLECTOR_ID}.sinks.hdfs-sink20.hdfs.rollSize = 0
> > ${FLUME_COLLECTOR_ID}.sinks.hdfs-sink20.hdfs.rollCount = 0
> > ${FLUME_COLLECTOR_ID}.sinks.hdfs-sink20.hdfs.batchSize = 2000
> > ${FLUME_COLLECTOR_ID}.sinks.hdfs-sink20.hdfs.callTimeout = 60000
> > ${FLUME_COLLECTOR_ID}.sinks.hdfs-sink20.hdfs.filePrefix > > ${FLUME_COLLECTOR_ID}_20
> > ${FLUME_COLLECTOR_ID}.sinks.hdfs-sink20.txnEventMax = 1000
> > ${FLUME_COLLECTOR_ID}.sinks.hdfs-sink20.serializer > > gr_flume_utils.serializer.JSONEventSerializer$Builder
> > ${FLUME_COLLECTOR_ID}.sinks.hdfs-sink20.channel = hdfs-fileChannel
> >
> >
> > 2012-11-06 02:21:03,098 [hdfs-hdfs-sink11-call-runner-5] WARN
> > org.apache.hadoop.hdfs.DFSClient - Error while syncing
> > java.io.EOFException
> > at java.io.DataInputStream.readShort(DataInputStream.java:298)
> > at
> >
> org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.createBlockOutputStream(DFSClient.java:3671)
> > at
> >
> org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.nextBlockOutputStream(DFSClient.java:3594)
> > at
> >
> org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.access$2400(DFSClient.java:2792)
> > at
> >
> org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSClient.java:2987)
> > 2012-11-06 02:21:03,098 [hdfs-hdfs-sink11-call-runner-5] WARN
> > org.apache.flume.sink.hdfs.BucketWriter - Caught IOException while
> closing
> > file
> > (hdfs://
> van-mang-perf-hadoop-relay.net:8020/rawLogs/2012-10-28/1700/van-mang-perf-flume-collector2-relay-net_11.1352168380390.lzo.tmp
> ).
> > Exception follows.
> > java.io.EOFException
> > at java.io.DataInputStream.readShort(DataInputStream.java:298)
> > at
> >
> org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.createBlockOutputStream(DFSClient.java:3671)
> > at
> >
> org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.nextBlockOutputStream(DFSClient.java:3594)
> > at
> >
> org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.access$2400(DFSClient.java:2792)
> > at
> >
> org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSClient.java:2987)
> > 2012-11-06 02:21:03,105 [SinkRunner-PollingRunner-DefaultSinkProcessor]
> WARN
> > org.apache.flume.sink.hdfs.HDFSEventSink - HDFS IO error
> > java.io.IOException: write beyond end of stream
> > at
> >
> com.hadoop.compression.lzo.LzopOutputStream.write(LzopOutputStream.java:127)
> > at java.io.OutputStream.write(OutputStream.java:58)
> > at
> >
> org.apache.flume.sink.hdfs.HDFSCompressedDataStream.append(HDFSCompressedDataStream.java:81)
> > at org.apache.flume.sink.hdfs.BucketWriter.append(BucketWriter.java:328)
> > at
> org.apache.flume.sink.hdfs.HDFSEventSink$1.call(HDFSEventSink.java:711)
> > at
> org.apache.flume.sink.hdfs.HDFSEventSink$1.call(HDFSEventSink.java:708)
> > at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)

Thanks

Cameron Gandevia