JDK 7u40 bug

David A. Webster DAWEBSTER at UP.COM
Wed Sep 18 15:29:37 UTC 2013


Is this just OpenJDK?  Not in HotSpot?

David Webster
Union Pacific Railroad
Lead Architect-Systems Engineering
Phone: (402) 544-1094 | Email: dawebster at up.com



From:   Elias Ross <genman at noderunner.net>
To:     "rhq-devel at lists.fedorahosted.org" 
<rhq-devel at lists.fedorahosted.org>
Cc:     "rhq-users at lists.fedorahosted.org" 
<rhq-users at lists.fedorahosted.org>
Date:   09/18/2013 10:14 AM
Subject:        Re: JDK 7u40 bug
Sent by:        rhq-devel-bounces at lists.fedorahosted.org




On Wed, Sep 18, 2013 at 7:25 AM, John Sanda <jsanda at redhat.com> wrote:
I just learned about a NIO bug[1] in the latest JDK 7u40 release that 
could impact RHQ. The storage node makes extensive use of java.nio as does 
the client library used by the RHQ server. Just something of which to be 
aware if you are running on Java 7 u40.


The file descriptor count would have to be over 64k, which I suppose could 
happen, though for that most people would need a much higher ulimit. All 
64k would have to be in use, not just created as POSIX says you have to 
reuse closed file descriptors.

By the way, it looks like RHQ uses about one socket per connection, and 
about 1000 file descriptors (jar files etc.) out of the box.
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