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https://issues.apache.org/jira/browse/KAFKA-3689?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Jun Rao updated KAFKA-3689:
---------------------------
Attachment: kafka-3689-instrumentation.patch
[~buvana.rama...@nokia.com], our current logging doesn't tell you the port from
the client when it hit that exception. I added a bit instrumentation to the
code and attached the change as a patch. Could you apply the patch to the
0.10.0 branch and run your test to reproduce the issue again? The patched
version will tell us whether the exception is hit repeatedly by the same client
(i.e. ip+port).
> ERROR Processor got uncaught exception. (kafka.network.Processor)
> -----------------------------------------------------------------
>
> Key: KAFKA-3689
> URL: https://issues.apache.org/jira/browse/KAFKA-3689
> Project: Kafka
> Issue Type: Bug
> Components: network
> Affects Versions: 0.9.0.1
> Environment: ubuntu 14.04,
> java version "1.7.0_95"
> OpenJDK Runtime Environment (IcedTea 2.6.4) (7u95-2.6.4-0ubuntu0.14.04.2)
> OpenJDK 64-Bit Server VM (build 24.95-b01, mixed mode)
> 3 broker cluster (all 3 servers identical - Intel Xeon E5-2670 @2.6GHz,
> 8cores, 16 threads 64 GB RAM & 1 TB Disk)
> Kafka Cluster is managed by 3 server ZK cluster (these servers are different
> from Kafka broker servers). All 6 servers are connected via 10G switch.
> Producers run from external servers.
> Reporter: Buvaneswari Ramanan
> Assignee: Jun Rao
> Priority: Minor
> Fix For: 0.10.1.0, 0.10.0.1
>
> Attachments: kafka-3689-instrumentation.patch
>
> Original Estimate: 72h
> Remaining Estimate: 72h
>
> As per Ismael Juma's suggestion in email thread to us...@kafka.apache.org
> with the same subject, I am creating this bug report.
> The following error occurs in one of the brokers in our 3 broker cluster,
> which serves about 8000 topics. These topics are single partitioned with a
> replication factor = 3. Each topic gets data at a low rate – 200 bytes per
> sec. Leaders are balanced across the topics.
> Producers run from external servers (4 Ubuntu servers with same config as the
> brokers), each producing to 2000 topics utilizing kafka-python library.
> This error message occurs repeatedly in one of the servers. Between the hours
> of 10:30am and 1:30pm on 5/9/16, there were about 10 Million such
> occurrences. This was right after a cluster restart.
> This is not the first time we got this error in this broker. In those
> instances, error occurred hours / days after cluster restart.
> =====================================================
> [2016-05-09 10:38:43,932] ERROR Processor got uncaught exception.
> (kafka.network.Processor)
> java.lang.IllegalArgumentException: Attempted to decrease connection count
> for address with no connections, address: /X.Y.Z.144 (actual network address
> masked)
> at
> kafka.network.ConnectionQuotas$$anonfun$9.apply(SocketServer.scala:565)
> at
> kafka.network.ConnectionQuotas$$anonfun$9.apply(SocketServer.scala:565)
> at scala.collection.MapLike$class.getOrElse(MapLike.scala:128)
> at scala.collection.AbstractMap.getOrElse(Map.scala:59)
> at kafka.network.ConnectionQuotas.dec(SocketServer.scala:564)
> at
> kafka.network.Processor$$anonfun$run$13.apply(SocketServer.scala:450)
> at
> kafka.network.Processor$$anonfun$run$13.apply(SocketServer.scala:445)
> at scala.collection.Iterator$class.foreach(Iterator.scala:742)
> at scala.collection.AbstractIterator.foreach(Iterator.scala:1194)
> at scala.collection.IterableLike$class.foreach(IterableLike.scala:72)
> at scala.collection.AbstractIterable.foreach(Iterable.scala:54)
> at kafka.network.Processor.run(SocketServer.scala:445)
> at java.lang.Thread.run(Thread.java:745)
> [2016-05-09 10:38:43,932] ERROR Processor got uncaught exception.
> (kafka.network.Processor)
> java.lang.IllegalArgumentException: Attempted to decrease connection count
> for address with no connections, address: /X.Y.Z.144
> at
> kafka.network.ConnectionQuotas$$anonfun$9.apply(SocketServer.scala:565)
> at
> kafka.network.ConnectionQuotas$$anonfun$9.apply(SocketServer.scala:565)
> at scala.collection.MapLike$class.getOrElse(MapLike.scala:128)
> at scala.collection.AbstractMap.getOrElse(Map.scala:59)
> at kafka.network.ConnectionQuotas.dec(SocketServer.scala:564)
> at
> kafka.network.Processor$$anonfun$run$13.apply(SocketServer.scala:450)
> at
> kafka.network.Processor$$anonfun$run$13.apply(SocketServer.scala:445)
> at scala.collection.Iterator$class.foreach(Iterator.scala:742)
> at scala.collection.AbstractIterator.foreach(Iterator.scala:1194)
> at scala.collection.IterableLike$class.foreach(IterableLike.scala:72)
> at scala.collection.AbstractIterable.foreach(Iterable.scala:54)
> at kafka.network.Processor.run(SocketServer.scala:445)
> at java.lang.Thread.run(Thread.java:745)
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