AH hah! The log-cleaner.log file did NOT go into the logs directory for some
reason, found it in the kafka root directory. But in there I found the
following output:
[2015-02-03 15:43:08,128] INFO Cleaner 0: Beginning cleaning of log
dev_testcompact-9. (kafka.log.LogCleaner)
[2015-02-03 15:43:08,129] INFO Cleaner 0: Building offset map for
dev_testcompact-9... (kafka.log.LogCleaner)
[2015-02-03 15:43:08,222] INFO Cleaner 0: Building offset map for log
dev_testcompact-9 for 15 segments in offset range [0, 230).
(kafka.log.LogCleaner)
[2015-02-03 15:43:08,227] ERROR [kafka-log-cleaner-thread-0], Error due to
(kafka.log.LogCleaner)
java.lang.IllegalArgumentException: requirement failed: Last clean offset is 0
but segment base offset is 152 for log dev_testcompact -9.
at scala.Predef$.require(Predef.scala:214)
at kafka.log.Cleaner.buildOffsetMap(LogCleaner.scala:491)
at kafka.log.Cleaner.clean(LogCleaner.scala:288)
at kafka.log.LogCleaner$CleanerThread.cleanOrSleep(LogCleaner.scala:202)
at kafka.log.LogCleaner$CleanerThread.doWork(LogCleaner.scala:187)
at kafka.utils.ShutdownableThread.run(ShutdownableThread.scala:51)
[2015-02-03 15:43:08,232] INFO [kafka-log-cleaner-thread-0], Stopped
(kafka.log.LogCleaner)
It appears it doesn't like the fact that some of the log segments have been
deleted already... ? From when I was using cleanup.policy=delete ?
"Last clean offset is 0 but segment base offset is 152 for log
dev_vsw.avrodto.addelivery.machinelearning.adbanditmodel-9."
Thanks,
Thunder
-----Original Message-----
From: Thunder Stumpges [mailto:tstump...@ntent.com]
Sent: Tuesday, February 03, 2015 3:37 PM
To: users@kafka.apache.org
Subject: RE: Turning on cleanup.policy=compact for a topic => not starting
cleanup ?
Thanks Joel for the quick turnaround!
1st, I took a look at "max-dirty-percent" and noticed it is "100", so that's a
good sign that it *should* have something to clean.
2nd, I didn't realize the cleaner messages went to a different log! However I
have NO log-cleaner.log file in the normal logs directory. It does seem to be
configured in log4j (we haven't changed any of the defaults here):
log4j.appender.cleanerAppender=org.apache.log4j.DailyRollingFileAppender
log4j.appender.cleanerAppender.DatePattern='.'yyyy-MM-dd-HH
log4j.appender.cleanerAppender.File=log-cleaner.log
log4j.appender.cleanerAppender.layout=org.apache.log4j.PatternLayout
log4j.appender.cleanerAppender.layout.ConversionPattern=[%d] %p %m (%c)%n
log4j.logger.kafka.log.LogCleaner=INFO, cleanerAppender
log4j.additivity.kafka.log.LogCleaner=false
3rd, no messages using compaction, all messages have a key.
So, lastly the thread dump. Not sure exactly how to do that or what thread I'd
be looking for specifically... Found a suggestion to run
Jstack -l <JAVA_PID> > jstack.out
So I did that, and looked for anything containing "Clean" or "clean" and no
matches.
I will be trying to set the log level for LogCleaner to debug to see if that
helps at all.
Thanks in advance,
Thunder
-----Original Message-----
From: Joel Koshy [mailto:jjkosh...@gmail.com]
Sent: Tuesday, February 03, 2015 3:07 PM
To: users@kafka.apache.org
Subject: Re: Turning on cleanup.policy=compact for a topic => not starting
cleanup ?
- Can you check the log cleaner logs?
- Do you have any compressed messages in your log? Or messages without
a key?
- By default it is in a log-cleaner.log file unless you modified that.
- Can you take a thread-dump to see if the log cleaner is still alive?
- Also, there is an mbean that you can poke: "max-dirty-percent" under
log cleaner. Can you check on its value?
Thanks,
Joel
On Tue, Feb 03, 2015 at 10:59:27PM +0000, Thunder Stumpges wrote:
> Hi guys, I am having a difficult time getting the log compaction to run on a
> topic I created initially with cleanup.policy=delete. Here's the details:
>
> 3 brokers, 0.8.1.1 all have log.cleaner.enable=true (other than this
> there are no non-defaults set in our server.properties)
>
> Create the topic first with policy=delete and a short window. Wanted to see
> that the segments were being created and deleted by the "normal" delete
> retention. This seemed to work fine. New segments created every 6 seconds
> while I add some test data, then the cleaner comes along and deletes log
> segments after 1min.
>
> sudo bin/kafka-topics.sh --zookeeper zk1:2181/kafka --create --topic
> dev_testcompact --partitions 10 --replication-factor 3 --config
> cleanup.policy=delete --config segment.ms=6000 --config
> retention.ms=60000
>
>
> Then I tried to update the policy to do compact:
> sudo bin/kafka-topics.sh --zookeeper zk1:2181/kafka --alter --topic
> dev_testcompact --config cleanup.policy=compact --config
> min.cleanable.dirty.ratio=0.3 -config delete.retention.ms=60000
>
> From this point, the deletion retention stopped cleaning up, but the compact
> cleaner doesn't seem to be running at all. I was expecting that after 15
> seconds (default for setting log.cleaner.backoff.ms) the cleaner would come
> in and compact the old segments. I now have generated 400 rows across 40 keys
> (so there is plenty to compact). Segments are being created every 6 seconds
> per the config.
>
> I have also tried removing the deletion related config:
>
> sudo bin/kafka-topics.sh --zookeeper zk1:2181/kafka --alter --topic
> dev_testcompact --deleteConfig retention.ms
>
> I then restarted one of the three brokers wondering if it needed to restart
> to pick up new configs, still no clenup. What am I doing wrong?!
