Bug#300943: libc6: Java VM locking on highly multithreaded Java apps

[Gerald Hochegger <gerald.hochegger@uni-klu.ac.at>]

Package: libc6
Version: 2.3.2.ds1-20
Severity: grave
Tags: patch
Justification: renders package unusable

Hello,

I have investigated the Java VM locking problem more closely:
(http://lists.debian.org/debian-glibc/2005/02/msg00080.html)

Kevin A. Burton
 We're running a java application server thats highly multithreaded and
 we're noticing that the VM is locking hard after about 30 minutes
 when I increase the thread count.
 This is still a lot of threads (600 or so) but there's no reason the
 entire process should lock. It also won't respond to a kill -9...
    
I've added the suggested two patches and identified one more from the
RHEL3 glibc SRPM

With these three patches I get no more Java VM lockups.

Please consider applying these patches - a locking Java VM is not much
fun when you need to run big J2EE applications.

You can find more detailed instructions on:
http://ubuntu.uni-klu.ac.at/UbuntuGlibcHoary

Thanks,
Gerald Hochegger


-- System Information:
Debian Release: 3.1
  APT prefers testing
  APT policy: (1001, 'testing')
Architecture: i386 (i686)
Kernel: Linux 2.6.10-uk-srv-p4
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968)

Versions of packages libc6 depends on:
ii  libdb1-compat                 2.1.3-7    The Berkeley database routines [gl

-- no debconf information