Red Hat Bugzilla – Bug 585992
wrong redirection in apachectl command, leaking disk space
Last modified: 2010-06-22 16:16:26 EDT
Description of problem:
we found leaked storage after some time of server runtime. this was found as possible cause.
Version-Release number of selected component (if applicable):
[root@fort-pub23 rhel-apachectl-fix]# uname -a
Linux fort-pub23 2.6.18-164.6.1.el5 #1 SMP Tue Oct 27 11:28:30 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux
[root@fort-pub23 rhel-apachectl-fix]# rpm -qa | grep httpd
[root@fort-pub23 rhel-apachectl-fix]# rpm -qf /usr/sbin/apachectl
[root@fort-pub23 rhel-apachectl-fix]# cat /etc/redhat-release
Red Hat Enterprise Linux Server release 5.4 (Tikanga)
found on 5.5 too
Steps to Reproduce:
leave server running with apache running.
disk space is leaking.
after reboot, space is again available
it looks like typo in redirection. here is the fix:
# diff -Nru apachectl.orig apachectl.fixed
--- apachectl.orig 2009-11-10 15:05:43.000000000 +0100
+++ apachectl.fixed 2010-04-26 17:26:06.000000000 +0200
@@ -101,7 +101,7 @@
case $ARGV in
- if $HTTPD $OPTIONS -t >&/dev/null; then
+ if $HTTPD $OPTIONS -t &>/dev/null; then
$HTTPD $OPTIONS -k $ARGV
Those are equivalent in bash; what led do you make that change and what difference does it make?
If you are regularly doing a reload/graceful restart of httpd, various modules can leak memory.
thanks for fast response.
this redirection was the first thing that was suspicious for us. script hash /bin/sh (not bash) shebang and this type of redirection is not common (>& is used mostly with output redirection by id) i checked that newer apache2 package in debian is using the more common style "2>/dev/null"
what is leaking is not ram memory, but disk space.
we will follow this issue more and report any informations.
Do you have further feedback on the issue?
no i have nothing to add. i vote for closing this bug as notabug
OK, thanks for getting back to us.