flume-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Zhiwen Sun <pens...@gmail.com>
Subject Re: Why used space of flie channel buffer directory increase?
Date Wed, 20 Mar 2013 01:30:55 GMT
Thanks all for your reply.

@Kenison
I stop my tail -F | nc program and there is no new event file in HDFS, so I
think there is no event arrive. To make sure, I will test again with enable
JMX.

@Alex

The latest log is following. I can't see any exception or warning.

13/03/19 15:28:16 INFO hdfs.BucketWriter: Renaming hdfs://
> 127.0.0.1:9000/flume/events/2013-03-19/app.1363660490901.tmp to hdfs://
> 127.0.0.1:9000/flume/events/2013-03-19/app.1363660490901
> 13/03/19 15:28:16 INFO hdfs.BucketWriter: Creating hdfs://
> 127.0.0.1:9000/flume/events/2013-03-19/app.1363660490902.tmp
> 13/03/19 15:28:17 INFO file.EventQueueBackingStoreFile: Start checkpoint
> for /home/zhiwensun/.flume/file-channel/checkpoint/checkpoint, elements to
> sync = 3
> 13/03/19 15:28:17 INFO file.EventQueueBackingStoreFile: Updating
> checkpoint metadata: logWriteOrderID: 1363659953997, queueSize: 0,
> queueHead: 362981
> 13/03/19 15:28:17 INFO file.LogFileV3: Updating log-7.meta currentPosition
> = 216278208, logWriteOrderID = 1363659953997
> 13/03/19 15:28:17 INFO file.Log: Updated checkpoint for file:
> /home/zhiwensun/.flume/file-channel/data/log-7 position: 216278208
> logWriteOrderID: 1363659953997
> 13/03/19 15:28:26 INFO hdfs.BucketWriter: Renaming hdfs://
> 127.0.0.1:9000/flume/events/2013-03-19/app.1363660490902.tmp to hdfs://
> 127.0.0.1:9000/flume/events/2013-03-19/app.1363660490902
> 13/03/19 15:28:27 INFO hdfs.BucketWriter: Creating hdfs://
> 127.0.0.1:9000/flume/events/2013-03-19/app.1363660490903.tmp
> 13/03/19 15:28:37 INFO hdfs.BucketWriter: Renaming hdfs://
> 127.0.0.1:9000/flume/events/2013-03-19/app.1363660490903.tmp to hdfs://
> 127.0.0.1:9000/flume/events/2013-03-19/app.1363660490903
> 13/03/19 15:28:37 INFO hdfs.BucketWriter: Creating hdfs://
> 127.0.0.1:9000/flume/events/2013-03-19/app.1363660490904.tmp
>
> 13/03/19 15:28:47 INFO file.EventQueueBackingStoreFile: Start checkpoint
> for /home/zhiwensun/.flume/file-channel/checkpoint/checkpoint, elements to
> sync = 2
> 13/03/19 15:28:47 INFO file.EventQueueBackingStoreFile: Updating
> checkpoint metadata: logWriteOrderID: 1363659954200, queueSize: 0,
> queueHead: 362981
> 13/03/19 15:28:47 INFO file.LogFileV3: Updating log-7.meta currentPosition
> = 216288815, logWriteOrderID = 1363659954200
> 13/03/19 15:28:47 INFO file.Log: Updated checkpoint for file:
> /home/zhiwensun/.flume/file-channel/data/log-7 position: 216288815
> logWriteOrderID: 1363659954200
> 13/03/19 15:28:48 INFO hdfs.BucketWriter: Renaming hdfs://
> 127.0.0.1:9000/flume/events/2013-03-19/app.1363660490904.tmp to hdfs://
> 127.0.0.1:9000/flume/events/2013-03-19/app.1363660490904
>

@Hari
em, 12 hours passed. The size of file channel directory has no reduce.

Files in file channel directory:

-rw-r--r-- 1 zhiwensun zhiwensun    0 2013-03-19 09:15 in_use.lock
> -rw-r--r-- 1 zhiwensun zhiwensun 1.0M 2013-03-19 10:11 log-6
> -rw-r--r-- 1 zhiwensun zhiwensun   29 2013-03-19 10:12 log-6.meta
> -rw-r--r-- 1 zhiwensun zhiwensun 207M 2013-03-19 15:28 log-7
> -rw-r--r-- 1 zhiwensun zhiwensun   29 2013-03-19 15:28 log-7.meta
> -rw-r--r-- 1 zhiwensun zhiwensun 207M 2013-03-19 15:28
> ./file-channel/data/log-7
> -rw-r--r-- 1 zhiwensun zhiwensun 29 2013-03-19 10:12
> ./file-channel/data/log-6.meta
> -rw-r--r-- 1 zhiwensun zhiwensun 29 2013-03-19 15:28
> ./file-channel/data/log-7.meta
> -rw-r--r-- 1 zhiwensun zhiwensun 0 2013-03-19 09:15
> ./file-channel/data/in_use.lock
> -rw-r--r-- 1 zhiwensun zhiwensun 1.0M 2013-03-19 10:11
> ./file-channel/data/log-6
>





Zhiwen Sun



On Wed, Mar 20, 2013 at 2:32 AM, Hari Shreedharan <hshreedharan@cloudera.com
> wrote:

>  It is possible for the directory size to increase even if no writes are
> going in to the channel. If the channel size is non-zero and the sink is
> still writing events to HDFS, the takes get written to disk as well (so we
> know what events in the files were removed when the channel/agent
> restarts). Eventually the channel will clean up the files which have all
> events taken (though it will keep at least 2 files per data directory, just
> to be safe).
>
> --
> Hari Shreedharan
>
> On Tuesday, March 19, 2013 at 10:32 AM, Alexander Alten-Lorenz wrote:
>
> Hey,
>
> what says debug? Do you can gather logs and attach them?
>
> - Alex
>
> On Mar 19, 2013, at 5:27 PM, "Kenison, Matt" <Matt.Kenison@disney.com>
> wrote:
>
> Check the JMX counter first, to make sure you really are not sending new
> events. If not, is it your checkpoint directory or data directory that is
> increasing in size?
>
>
> From: Zhiwen Sun <pensz01@gmail.com>
> Reply-To: "user@flume.apache.org" <user@flume.apache.org>
> Date: Tue, 19 Mar 2013 01:19:19 -0700
> To: "user@flume.apache.org" <user@flume.apache.org>
> Subject: Why used space of flie channel buffer directory increase?
>
> hi all:
>
> I test flume-ng in my local machine. The data flow is :
>
> tail -F file | nc 127.0.0.01 4444 > flume agent > hdfs
>
> My configuration file is here :
>
> a1.sources = r1
> a1.channels = c2
>
> a1.sources.r1.type = netcat
> a1.sources.r1.bind = 192.168.201.197
> a1.sources.r1.port = 44444
> a1.sources.r1.max-line-length = 1000000
>
> a1.sinks.k1.type = logger
>
> a1.channels.c1.type = memory
> a1.channels.c1.capacity = 10000
> a1.channels.c1.transactionCapacity = 10000
>
> a1.channels.c2.type = file
> a1.sources.r1.channels = c2
>
> a1.sources.r1.interceptors = i1
> a1.sources.r1.interceptors.i1.type = timestamp
>
> a1.sinks = k2
> a1.sinks.k2.type = hdfs
> a1.sinks.k2.channel = c2
> a1.sinks.k2.hdfs.path = hdfs://127.0.0.1:9000/flume/events/%Y-%m-%d
> a1.sinks.k2.hdfs.writeFormat = Text
> a1.sinks.k2.hdfs.rollInterval = 10
> a1.sinks.k2.hdfs.rollSize = 10000000
> a1.sinks.k2.hdfs.rollCount = 0
>
> a1.sinks.k2.hdfs.filePrefix = app
> a1.sinks.k2.hdfs.fileType = DataStream
>
>
>
>
> it seems that events were collected correctly.
>
> But there is a problem boring me: Used space of file channel (~/.flume)
> has always increased, even there is no new event.
>
> Is my configuration wrong or other problem?
>
> thanks.
>
>
> Best regards.
>
> Zhiwen Sun
>
>
> --
> Alexander Alten-Lorenz
> http://mapredit.blogspot.com
> German Hadoop LinkedIn Group: http://goo.gl/N8pCF
>
>
>

Mime
View raw message