Hi Ashish, Sorry, but I disagree.
I would agree with you in case that Mike has developed some custom implementation for Flume, so he would need to pin point in stack trace. But, he didn't. He's using quite common setup, so in my opinion it's either up to a hardware failure, kernel-level malfunction, Flume component malfunction or he just has too much incoming events for the given setup. Looking up a stack trace would be an overkill at this point. Regards, Ahmed On Thu, Oct 16, 2014 at 10:37 AM, Ashish <[email protected]> wrote: > I would start with trying to find which Thread is consuming most CPU. The > stacktrace shall give you a good hint on the direction to proceed. > > Blogged about the process here > http://www.ashishpaliwal.com/blog/2011/08/finding-java-thread-consuming-high-cpu/ > > Hope it help > ashish > > On Wed, Oct 15, 2014 at 9:02 PM, Mike Zupan <[email protected]> wrote: > >> I’m seeing issues with flume server using very high amounts of CPU. Just >> wondering if this is a common issue with a file channel. I’m pretty new to >> flume so sorry if this isn’t enough to debug the issue. >> >> Current top looks like >> >> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND >> 8509 root 20 0 22.0g 8.6g 675m S 1109.4 13.7 1682:45 java >> 8251 root 20 0 21.9g 8.3g 647m S 1083.5 13.2 1476:27 java >> 7593 root 20 0 12.4g 8.4g 18m S 1007.5 13.4 1866:18 java >> >> As you can see we have 3 out of 4 flume servers using 1000% cpu. >> >> Details are >> >> OS: CentOS 6.5 >> Java: Oracle "1.7.0_45" >> Flume: flume-1.4.0.2.1.1.0-385.el6.noarch >> >> Our config for the server looks like this >> >> ############################################### >> # Agent configuration for transactional data >> ############################################### >> nontx_host07_agent01.sources = avro >> nontx_host07_agent01.channels = fc >> nontx_host07_agent01.sinks = hdfs_sink_01 hdfs_sink_02 hdfs_sink_03 >> hdfs_sink_04 >> >> ################################################## >> # info is published to port 9991 >> ################################################## >> nontx_host07_agent01.sources.avro.type = avro >> nontx_host07_agent01.sources.avro.bind = 0.0.0.0 >> nontx_host07_agent01.sources.avro.port = 9991 >> nontx_host07_agent01.sources.avro.threads = 100 >> nontx_host07_agent01.sources.avro.compression-type = deflate >> nontx_host07_agent01.sources.avro.interceptors = ts id >> nontx_host07_agent01.sources.avro.interceptors.ts.type = timestamp >> nontx_host07_agent01.sources.avro.interceptors.ts.preserveExisting = false >> nontx_host07_agent01.sources.avro.interceptors.id.type = >> org.apache.flume.sink.solr.morphline.UUIDInterceptor$Builder >> nontx_host07_agent01.sources.avro.interceptors.id.preserveExisting = true >> >> >> ################################################## >> # The Channels >> ################################################## >> nontx_host07_agent01.channels.fc.type = file >> nontx_host07_agent01.channels.fc.checkpointDir = >> /flume/channels/checkpoint/nontx_host07_agent01 >> nontx_host07_agent01.channels.fc.dataDirs = >> /flume/channels/data/nontx_host07_agent01 >> nontx_host07_agent01.channels.fc.capacity = 140000000 >> nontx_host07_agent01.channels.fc.transactionCapacity = 240000 >> >> ################################################## >> # Sinks >> ################################################## >> nontx_host07_agent01.sinks.hdfs_sink_01.type = hdfs >> nontx_host07_agent01.sinks.hdfs_sink_01.hdfs.path = >> hdfs://cluster01:8020/flume/%{log_type} >> nontx_host07_agent01.sinks.hdfs_sink_01.hdfs.filePrefix = >> flume_nontx_host07_agent01_sink01_%Y%m%d%H >> nontx_host07_agent01.sinks.hdfs_sink_01.hdfs.inUsePrefix=_ >> nontx_host07_agent01.sinks.hdfs_sink_01.hdfs.inUseSuffix=.tmp >> nontx_host07_agent01.sinks.hdfs_sink_01.hdfs.fileType = CompressedStream >> nontx_host07_agent01.sinks.hdfs_sink_01.hdfs.codeC = snappy >> nontx_host07_agent01.sinks.hdfs_sink_01.hdfs.rollSize = 0 >> nontx_host07_agent01.sinks.hdfs_sink_01.hdfs.rollCount = 0 >> nontx_host07_agent01.sinks.hdfs_sink_01.hdfs.rollInterval = 300 >> nontx_host07_agent01.sinks.hdfs_sink_01.hdfs.idleTimeout = 30 >> nontx_host07_agent01.sinks.hdfs_sink_01.hdfs.timeZone = >> America/Los_Angeles >> nontx_host07_agent01.sinks.hdfs_sink_01.hdfs.callTimeout = 30000 >> nontx_host07_agent01.sinks.hdfs_sink_01.hdfs.batchSize = 50000 >> nontx_host07_agent01.sinks.hdfs_sink_01.hdfs.round = true >> nontx_host07_agent01.sinks.hdfs_sink_01.hdfs.roundUnit = minute >> nontx_host07_agent01.sinks.hdfs_sink_01.hdfs.roundValue = 5 >> nontx_host07_agent01.sinks.hdfs_sink_01.hdfs.threadsPoolSize = 2 >> nontx_host07_agent01.sinks.hdfs_sink_01.serializer = >> com.manage.flume.serialization.HeaderAndBodyJsonEventSerializer$Builder >> >> -- >> Mike Zupan >> >> > > > -- > thanks > ashish > > Blog: http://www.ashishpaliwal.com/blog > My Photo Galleries: http://www.pbase.com/ashishpaliwal > -- --------------------------------------------------------------------- This e-mail and any attachment is for authorised use by the intended recipient(s) only. 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