DO NOT REPLY [Bug 46629] New: Apache hanging on system calls for php and perl

[bu...@apache.org]

https://issues.apache.org/bugzilla/show_bug.cgi?id=46629

           Summary: Apache hanging on system calls for php and perl
           Product: Apache httpd-2
           Version: 2.2.6
          Platform: PC
               URL: Internal application development
        OS/Version: Windows Server 2003
            Status: NEW
          Severity: major
          Priority: P2
         Component: Core
        AssignedTo: bugs@httpd.apache.org
        ReportedBy: rolinger1@hotmail.com


While researching my problem using Perl 5.10, I came across another thread on
the php.net site related to this issue as well. 
http://bugs.php.net/bug.php?id=44942

Using perl's backtick (ie: @files = `dir ../config /O:D /A:-D`;) command to do
a system call hangs Apache's CGI.  Once it hangs any other Perl script that
uses a system call will hang leaving both 'cmd' and 'perl' process hung in
memory.  And any other Perl script that doesn't have a system call will
execute, return the data, but the 'perl' process will stay resident in memory. 
Eventually if enough cmd and/or perl processes remain in memory the system CPU
pegs at 100% or Apache completely locks up requiring a system reboot.

A: No log or error messages are created
B: Sometimes it goes 10 days without a hang or just two days, and sometimes
scripts with system/exec calls will run fine 100 times, and then just 5 times,
before hanging.
C: After a hang, a sevice restart usually works to get everything working
again. But occassionally a full system reboot is required.

The above link to the PHP article refers to a similar problem with PHPs 'exec'
system calls causing Apache to hang.

PS: My apologies if this is already a documented issue, I searched bugzilla and
found nothing similar in nature to what I (and the PHP users) are experiencing.


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