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Flume >> mail # user >> Uncaught Exception When Using Spooling Directory Source

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Re: Uncaught Exception When Using Spooling Directory Source
We have a advertisement system, which owns hundreds of impr-servers, each
of them runs service such as resin, and generates log files every seconds.
We want to in time collect these log files from each server to a central
storage system such as MooseFS for real time analysis, then archive them to
HDFS by hour.

What we need is to deploy Flume to collect remote log files from a
alterable server-and-path list (the list can be ofen changed, to add or
remove collecting location). We hope every log file may be collected almost
real time.
On Fri, Jan 18, 2013 at 3:45 PM, Mike Percy <[EMAIL PROTECTED]> wrote:

> Can you provide more detail about what kinds of services?
> If you roll the logs every 5 minutes or so then you can configure the
> spooling source to pick them up once they are rolled by either rolling them
> into a directory for immutable files or using the trunk version of the
> spooling file source to specify a filter to ignore files that don't match a
> "rolled" pattern.
> You could also use exec source with "tail -F" but that is much more
> unreliable than the spooling file source.
> Regards,
> Mike
> On Thu, Jan 17, 2013 at 10:23 PM, Henry Ma <[EMAIL PROTECTED]>wrote:
>> OK, thank you very much, now I know why the problem occurs.
>> I am a new comer of Flume. Here is my scenario: using Flume to collecting
>> from hundreds of directories from dozens of servers to a central storage.
>> It seems that spooling directory source may not be the best choice. Can
>> someone give me some advice about how to design the architecture? Which
>> type of source and sink can fit?
>> Thanks!
>> On Fri, Jan 18, 2013 at 2:05 PM, Mike Percy <[EMAIL PROTECTED]> wrote:
>>> Hi Henry,
>>> The files must be immutable before putting them into the spooling
>>> directory. So if you copy them from a different file system then you can
>>> run into this issue. The right way to do it is to copy them to the same
>>> file system and then atomically move them into the spooling directory.
>>> Regards,
>>> Mike
>>> On Thu, Jan 17, 2013 at 9:59 PM, Henry Ma <[EMAIL PROTECTED]>wrote:
>>>> Thank you very much! I clean all the related dir and restart again. I
>>>> keep the source spooling dir empty, then start Flume, and then put some
>>>> file into the spooling dir. But this time a new error occured:
>>>> 13/01/18 13:44:24 INFO avro.SpoolingFileLineReader: Preparing to move
>>>> file
>>>> /disk2/mahy/FLUME_TEST/source/sspstat.log.20130118112700-20130118112800.hs016.ssp
>>>> to /disk2/mahy/FLUME_TEST/
>>>> source/sspstat.log.20130118112700-20130118112800.hs016.ssp.COMPLETED
>>>> 13/01/18 13:44:24 ERROR source.SpoolDirectorySource: Uncaught exception
>>>> in Runnable
>>>> java.lang.IllegalStateException: File has changed size since being
>>>> read:
>>>> /disk2/mahy/FLUME_TEST/source/sspstat.log.20130118112700-20130118112800.hs016.ssp
>>>>         at
>>>> org.apache.flume.client.avro.SpoolingFileLineReader.retireCurrentFile(SpoolingFileLineReader.java:241)
>>>>         at
>>>> org.apache.flume.client.avro.SpoolingFileLineReader.readLines(SpoolingFileLineReader.java:185)
>>>>         at
>>>> org.apache.flume.source.SpoolDirectorySource$SpoolDirectoryRunnable.run(SpoolDirectorySource.java:135)
>>>>         at
>>>> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
>>>>         at
>>>> java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:317)
>>>>         at
>>>> java.util.concurrent.FutureTask.runAndReset(FutureTask.java:150)
>>>>         at
>>>> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ScheduledThreadPoolExecutor.java:98)
>>>>         at
>>>> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.runPeriodic(ScheduledThreadPoolExecutor.java:180)
>>>>         at
>>>> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:204)
>>>>         at
>>>> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
Henry Ma