[DIRMINA-584] Using apr-transport crashes jvm on Linux

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.0-M1
• Fix Version/s: 2.0.0-M2
• Component/s: Transport

Environment

Linux jellikit 2.6.24-16-generic #1 SMP Thu Apr 10 13:23:42 UTC 2008 i686 GNU/Linux

java version "1.6.0_06"
Java(TM) SE Runtime Environment (build 1.6.0_06-b02)
Java HotSpot(TM) Server VM (build 10.0-b22, mixed mode)

tomcat-native-1.1.13

apr-1.2.11

• Assignee: Julien Vermillard
• Reporter: Geoff Cadien
• Created: 14/May/08 00:35
• Updated: 06/Jun/08 08:25
• Resolved: 06/Jun/08 08:25

Description

To reproduce you can simply run the EchoServer from mina-example and use AprIoAcceptor instead of NioAcceptor. I used the EchoClient from Julien Vermillard's sandbox here: https://svn.apache.org/repos/asf/mina/sandbox/jvermillard/ and used 20 or 30 concurrent connections.

AprIoProcessor.destroy() is called multiple times when an exception is generated in AbstractPollingIoProcessor (RST, etc.) and either epoll or apr doesn't like to remove a closed fd from the pollset. I believe that destroy is called twice because AprIoProcessor.state() returns SessionState.OPEN when the native fd is > 0. I don't believe once open it will ever be 0 again.

I was able to fix the problem by explicitly settion AprSession.descriptor to 0 after the socket was closed although I'm not sure this is the correct solution.