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From "Jay Kreps (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (KAFKA-1024) possible memory leak in 0.8 beta1 producer with G1GC
Date Wed, 28 Aug 2013 17:02:53 GMT

    [ https://issues.apache.org/jira/browse/KAFKA-1024?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13752578#comment-13752578
] 

Jay Kreps commented on KAFKA-1024:
----------------------------------

Interesting....
                
> possible memory leak in 0.8 beta1 producer with G1GC
> ----------------------------------------------------
>
>                 Key: KAFKA-1024
>                 URL: https://issues.apache.org/jira/browse/KAFKA-1024
>             Project: Kafka
>          Issue Type: Bug
>    Affects Versions: 0.8
>         Environment: java version "1.7.0_17"
> Java(TM) SE Runtime Environment (build 1.7.0_17-b02)
> Java HotSpot(TM) 64-Bit Server VM (build 23.7-b01, mixed mode)
>            Reporter: Jason Toffaletti
>
> I have this in my pom.xml
>         <dependency>
>             <groupId>org.apache.kafka</groupId>
>             <artifactId>kafka_2.9.2</artifactId>
>             <version>0.8.0-beta1</version>
>         </dependency>
>         <dependency>
>             <groupId>org.scala-lang</groupId>
>             <artifactId>scala-library</artifactId>
>             <version>2.9.2</version>
>         </dependency>
>         <dependency>
>             <groupId>org.xerial.snappy</groupId>
>             <artifactId>snappy-java</artifactId>
>             <version>1.0.4.1</version>
>         </dependency>
> I'm using snappy compression codec and producing about 7k msg/sec on average. I'm producing
batches up to 10 messages per batch with null keys to a topic with 16 partitions, no replication.
Xms and Xmx are 64MB and I'm using XX:+UseG1GC. After about 12 hours of operation heap usage
hits right up against the 64MB limit and the producer drops to about 4k msg/sec because of
the GC pressure. When I restart the process the heap usage goes back to normal (around 30MB)
and the producer does 7k msg/sec again.
> What else can I provide to help debug this?

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