JDK-6897993 : (se) Close or cancel performance issue when number of pending updates is high (lnx)
  • Type: Bug
  • Component: core-libs
  • Sub-Component: java.nio
  • Affected Version: 7
  • Priority: P3
  • Status: Resolved
  • Resolution: Fixed
  • OS: generic
  • CPU: generic
  • Submitted: 2009-11-04
  • Updated: 2010-04-02
  • Resolved: 2009-11-24
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JDK 6 JDK 7 Other
6u18Fixed 7 b77Fixed OpenJDK6Fixed
Related Reports
Relates :  
JDK-6693490 - (se) select throws "File exists" IOException under load (lnx)
Description
The epoll Selector has a performance bug that arises when a channel is closed and the queue of pending updates is long. The issue was brought up on the nio-dev mailing list here:

http://mail.openjdk.java.net/pipermail/nio-dev/2009-November/000707.html
Comments
EVALUATION An interim fix has been pushed to b77: http://hg.openjdk.java.net/jdk7/tl/jdk/rev/6b48ea20e0b9 and we'll replace the List in a future build.
07-11-2009
EVALUATION This is regression in jdk7 since b55 caused by this fix: http://hg.openjdk.java.net/jdk7/jdk7/jdk/rev/7264cacbddaa
04-11-2009