[
https://issues.apache.org/jira/browse/KAFKA-1024?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Jason Toffaletti closed KAFKA-1024.
-----------------------------------
Using the default Parallel GC, memory usage hasn't grown in 4 hours and CPU
usage shown by top is down from 240% to 140%.
Some selections from jmap histogram show a dramatic difference.
{noformat}
6: 193630 4647120 java.lang.String
8: 11365 3939472 byte[]
18: 13673 476928 java.lang.Object[]
23: 3558 293600 java.util.HashMap$Entry[]
38: 1092 61152 java.util.HashMap
62: 343 10976 java.util.Vector
{noformat}
All signs point to G1GC being the 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?
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira
