Re: too many open files - broker died

[Jun Rao]

The # of required open file handlers is # client socket connections + # log
segment and index files.

Thanks,

Jun


On Fri, Nov 1, 2013 at 10:28 PM, Kane Kane <kane.ist...@gmail.com> wrote:

> I had only 1 topic with 45 partitions replicated across 3 brokers.
> After several hours of uploading some data to kafka 1 broker died with
> the following exception.
> I guess i can fix it raising limit for open files, but I wonder how it
> happened under described circumstances.
>
>
> [2013-11-02 00:19:14,862] INFO Reconnect due to socket error: null
> (kafka.consumer.SimpleConsumer)
> [2013-11-02 00:19:14,706] INFO Reconnect due to socket error: null
> (kafka.consumer.SimpleConsumer)
>
> [2013-11-02 00:19:05,150] INFO Reconnect due to socket error: null
> (kafka.consumer.SimpleConsumer)
> [2013-11-02 00:09:08,569] FATAL [ReplicaFetcherThread-0-2], Disk error
> while replicating data. (kafka.server.ReplicaFetcherThread)
> kafka.common.KafkaStorageException: I/O exception in append to log
> 'perf1-4'
>         at kafka.log.Log.append(Unknown Source)
>         at kafka.server.ReplicaFetcherThread.processPartitionData(Unknown
> Source)
>         at
> kafka.server.AbstractFetcherThread$$anonfun$processFetchRequest$1$$anonfun$apply$mcV$sp$2.apply(Unknown
> Source)
>         at
> kafka.server.AbstractFetcherThread$$anonfun$processFetchRequest$1$$anonfun$apply$mcV$sp$2.apply(Unknown
> Source)
>         at
> scala.collection.immutable.HashMap$HashMap1.foreach(HashMap.scala:224)
>         at
> scala.collection.immutable.HashMap$HashTrieMap.foreach(HashMap.scala:403)
>         at
> kafka.server.AbstractFetcherThread$$anonfun$processFetchRequest$1.apply$mcV$sp(Unknown
> Source)
>         at
> kafka.server.AbstractFetcherThread$$anonfun$processFetchRequest$1.apply(Unknown
> Source)
>         at
> kafka.server.AbstractFetcherThread$$anonfun$processFetchRequest$1.apply(Unknown
> Source)
>         at kafka.utils.Utils$.inLock(Unknown Source)
>         at kafka.server.AbstractFetcherThread.processFetchRequest(Unknown
> Source)
>         at kafka.server.AbstractFetcherThread.doWork(Unknown Source)
>         at kafka.utils.ShutdownableThread.run(Unknown Source)
> Caused by: java.io.FileNotFoundException:
> /disk1/kafka-logs/perf1-4/00000000000000010558.index (Too many open
> files)
>         at java.io.RandomAccessFile.open(Native Method)
>         at java.io.RandomAccessFile.<init>(RandomAccessFile.java:241)
>         at kafka.log.OffsetIndex$$anonfun$resize$1.apply(Unknown Source)
>         at kafka.log.OffsetIndex$$anonfun$resize$1.apply(Unknown Source)
>         at kafka.utils.Utils$.inLock(Unknown Source)
>         at kafka.log.OffsetIndex.resize(Unknown Source)
>         at
> kafka.log.OffsetIndex$$anonfun$trimToValidSize$1.apply$mcV$sp(Unknown
> Source)
>         at kafka.log.OffsetIndex$$anonfun$trimToValidSize$1.apply(Unknown
> Source)
>         at kafka.log.OffsetIndex$$anonfun$trimToValidSize$1.apply(Unknown
> Source)
>         at kafka.utils.Utils$.inLock(Unknown Source)
>         at kafka.log.OffsetIndex.trimToValidSize(Unknown Source)
>         at kafka.log.Log.roll(Unknown Source)
>         at kafka.log.Log.maybeRoll(Unknown Source)
>