Home | About | Sematext search-lucene.com search-hadoop.com
 Search Hadoop and all its subprojects:

Switch to Threaded View
Flume, mail # user - Exceptions after reloading configuration


Copy link to this message
-
Re: Exceptions after reloading configuration
Juhani Connolly 2013-01-17, 02:36
I hadn't noticed that patch, looks useful! Was mainly referring to 1.2
where hot  reconfiguration certainly wasn't reliable.

So I guess Sam is looking at either upgrading(recommended since 1.3.1
has lots of other goodness) and/or doing full restart on reconfiguration.

On 01/17/2013 11:18 AM, Brock Noland wrote:
> FLUME-1630 (in flume 1.3.1) hopefully improved re-configuration, but
> in general I agree, restart is better.
>
> On Wed, Jan 16, 2013 at 6:11 PM, Juhani Connolly
> <[EMAIL PROTECTED]> wrote:
>> Switching configuration on a running node is pretty buggy, I would recommend
>> just restarting flume, as while sometimes it will work there are issues like
>> components not getting properly shut down even when removed from the config.
>>
>>
>> On 01/17/2013 05:41 AM, Yatchmenoff, Sam wrote:
>>
>> I have Flume 1.2.0 running in a production system with 3 collectors fed by
>> ~30 agents running on our application servers. If I make a change to the
>> node configuration on the collectors, when the configuration is reloaded
>> automatically, the collectors will occasionally fail and repeatedly report
>> the following exception:
>>
>> 2013-01-16 20:31:22,353 ERROR flume.SinkRunner: Unable to deliver event.
>> Exception follows.
>> org.apache.flume.EventDeliveryException: Failed to process transaction
>> at org.apache.flume.sink.RollingFileSink.process(RollingFileSink.java:218)
>> at
>> org.apache.flume.sink.DefaultSinkProcessor.process(DefaultSinkProcessor.java:68)
>> at org.apache.flume.SinkRunner$PollingRunner.run(SinkRunner.java:147)
>> at java.lang.Thread.run(Thread.java:679)
>> Caused by: java.io.IOException: Stream Closed
>> at java.io.FileOutputStream.writeBytes(Native Method)
>> at java.io.FileOutputStream.write(FileOutputStream.java:297)
>> at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82)
>> at java.io.BufferedOutputStream.write(BufferedOutputStream.java:126)
>> at java.io.FilterOutputStream.write(FilterOutputStream.java:97)
>> at
>> org.apache.flume.serialization.BodyTextEventSerializer.write(BodyTextEventSerializer.java:71)
>> at org.apache.flume.sink.RollingFileSink.process(RollingFileSink.java:195)
>> ... 3 more
>>
>> After about a dozen of those, I will start seeing this exception:
>>
>> 2013-01-16 20:32:27,374 ERROR flume.SinkRunner: Unable to deliver event.
>> Exception follows.
>> org.apache.flume.EventDeliveryException: Unable to rotate file
>> /mnt/rawlog/1358365369665-49 while delivering event
>> at org.apache.flume.sink.RollingFileSink.process(RollingFileSink.java:155)
>> at
>> org.apache.flume.sink.DefaultSinkProcessor.process(DefaultSinkProcessor.java:68)
>> at org.apache.flume.SinkRunner$PollingRunner.run(SinkRunner.java:147)
>> at java.lang.Thread.run(Thread.java:679)
>> Caused by: java.io.IOException: Stream Closed
>> at java.io.FileOutputStream.writeBytes(Native Method)
>> at java.io.FileOutputStream.write(FileOutputStream.java:297)
>> at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82)
>> at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140)
>> at org.apache.flume.sink.RollingFileSink.process(RollingFileSink.java:149)
>> ... 3 more
>>
>>
>> Here is configuration for that agent:
>>
>> agent1.sources = source1 source2
>> agent1.sinks = sink1
>> agent1.channels = channel1
>>
>> # Describe/configure source1
>> agent1.sources.source1.type = avro
>> agent1.sources.source1.bind = 0.0.0.0
>> agent1.sources.source1.port = 35853
>>
>> agent1.sources.source2.type = netcat
>> agent1.sources.source2.bind = localhost
>> agent1.sources.source2.port = 35854
>> agent1.sources.source2.max-line-length = 524288
>>
>> # Describe sink1
>> agent1.sinks.sink1.type = FILE_ROLL
>> agent1.sinks.sink1.sink.directory = /mnt/rawlog
>> agent1.sinks.sink1.sink.rollInterval = 60
>>
>> # Use a channel which buffers events in memory
>> agent1.channels.channel1.type = file
>> agent1.channels.channel1.checkpointDir >> /mnt/flume-ng/file-channel1/checkpoint
>> agent1.channels.channel1.dataDirs = /mnt/flume-ng/file-channel1/data