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Flume, mail # user - flume agent with HDFS sink, syslog source and memory channel - stuck on hdfs IOException

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flume agent with HDFS sink, syslog source and memory channel - stuck on hdfs IOException
Suhas Satish 2013-10-11, 23:13
Hi I have the  following flume configuration file   flume-syslog.conf
(attached) -

1.) I laucnh it with -
bin/flume-ng agent -n agent -c conf -f conf/flume-syslog.conf

2.) Generate log output using loggen (provided by syslog-ng):
loggen -I 30 -s 300 -r 900 localhost 13073
3.) I verify flume output is generated under /flume_import/ on hadoop cluster.
It generates output of the form -

-rwxr-xr-x   3 root root     139235 2013-10-11 14:35
-rwxr-xr-x   3 root root     138095 2013-10-11 14:35
-rwxr-xr-x   3 root root     135795 2013-10-11 14:35

4.)  Delete the flume output files while loggen is still running and Flume is
generating the sink output.

hadoop fs -rmr /flume_import/2013/10/14/logdata-2013-10-14-35-47.1381527347670.tmp

5. )This  gives me the following exception in the flume log. Although
the flume agent JVM continues to run, it does not generate any more
output files from syslog-ng  until the flume agent JVM is restarted.
Is flume  expected to behave like this or  should it handle
IOException gracefully and continue to log output of syslog to other
output directories?

10 Oct 2013 16:55:42,092 WARN  [SinkRunner-PollingRunner-DefaultSinkProcessor]
(org.apache.flume.sink.hdfs.BucketWriter.append:430)  - Caught IOException
while closing file
Exception follows.
java.io.IOException: 2049.112.5249612
/flume_import/2013/10/16/logdata-2013-10-16-50-03.1381449008596.tmp (Stale file
    at com.mapr.fs.Inode.throwIfFailed(Inode.java:269)
    at com.mapr.fs.Inode.flushJniBuffers(Inode.java:402)
    at com.mapr.fs.Inode.syncInternal(Inode.java:478)
    at com.mapr.fs.Inode.syncUpto(Inode.java:484)
    at com.mapr.fs.MapRFsOutStream.sync(MapRFsOutStream.java:244)
    at com.mapr.fs.MapRFsDataOutputStream.sync(MapRFsDataOutputStream.java:68)
    at org.apache.hadoop.io.SequenceFile$Writer.syncFs(SequenceFile.java:946)
    at org.apache.flume.sink.hdfs.BucketWriter$5.call(BucketWriter.java:356)
    at org.apache.flume.sink.hdfs.BucketWriter$5.call(BucketWriter.java:353)
    at org.apache.flume.sink.hdfs.BucketWriter$8$1.run(BucketWriter.java:536)
    at org.apache.flume.sink.hdfs.BucketWriter$8.call(BucketWriter.java:533)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
    at java.util.concurrent.FutureTask.run(FutureTask.java:138)
6.) I found the following related post

http://mail-archives.apache.org/mod_mbox/flume-user/201305.mbox/%[EMAIL PROTECTED]%3E

Not sure if its related to this issue. Can anyone comment?