[APLO-160] Reduce memory overhead of many connections.

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.3
• Environment: apollo-1.1-20120209.032648-24
• Assignee: Hiram R. Chirino
• Reporter: Lionel Cons
• Created: 14/Feb/12 13:29
• Updated: 03/May/12 05:32
• Resolved: 03/May/12 01:41

Description

While running a stress test against apollo-1.1-20120209.032648-24 (many concurrent TCP connections), the broker became unresponsive.

It logged several times: java.lang.OutOfMemoryError: GC overhead limit exceeded

It also logged other warnings, probably related:

2012-02-14 14:14:49,273 | WARN | handle failed | org.eclipse.jetty.io.nio | Apollo Task
2012-02-14 14:18:39,073 | WARN | Problem scavenging sessions | org.eclipse.jetty.server.session | HashSessionScavenger-0

It could not be stopped either, I had to kill -9 it.

What can be done to avoid these problems?

FWIW, java has been started with -server -Xmx8192m -Xms4096m