To follow up with my last email, I have been looking into 
socket.receive.buffer.byte as well as socket.send.buffer.bytes. Would it help 
to increase the buffer for OOM issue?

All help is appreciated!

Thanks!


-nick


From: "McKoy, Nick" 
<[email protected]<mailto:[email protected]>>
Date: Monday, April 18, 2016 at 3:41 PM
To: "[email protected]<mailto:[email protected]>" 
<[email protected]<mailto:[email protected]>>
Subject: Out of memory - Java Heap space

Hey all,

I have a kafka cluster of 5 nodes that’s working really hard. CPU is around 40% 
idle daily.

I looked at the file descriptor note on this documentation page 
http://docs.confluent.io/1.0/kafka/deployment.html#file-descriptors-and-mmap 
and decided to give it a shot on one instance in the cluster just to see how it 
performed. I increased this number to 1048576.

I kept getting this error from the kafka logs:
ERROR [ReplicaFetcherThread--1-6], Error due to 
(kafka.server.ReplicaFetcherThread) java.lang.OutOfMemoryError: Java heap space

I increased heap to see if that would help and I kept seeing these errors. 
Could the file descriptor change have something related to this?



—
Nicholas McKoy
Engineering – Big Data and Personalization
Washington Post Media

One Franklin Square, Washington, DC 20001
Email: [email protected]<mailto:[email protected]>

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