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Posted to dev@kafka.apache.org by "Jay Kreps (JIRA)" <ji...@apache.org> on 2013/08/27 23:07:53 UTC
[jira] [Resolved] (KAFKA-1024) possible memory leak in 0.8 beta1
producer with G1GC
[ https://issues.apache.org/jira/browse/KAFKA-1024?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jay Kreps resolved KAFKA-1024.
------------------------------
Resolution: Not A Problem
> 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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