Bug 457477 - times(NULL) returning negative value
times(NULL) returning negative value
Product: Red Hat Enterprise Linux 4
Classification: Red Hat
Component: glibc (Show other bugs)
All Linux
low Severity low
: rc
: ---
Assigned To: Jakub Jelinek
Brian Brock
Depends On:
  Show dependency treegraph
Reported: 2008-07-31 16:34 EDT by Abhishek Lahiri
Modified: 2008-07-31 17:04 EDT (History)
0 users

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2008-07-31 16:47:08 EDT
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)
Strace of failed and successful odbcsql commands (566.32 KB, application/x-compressed)
2008-07-31 16:34 EDT, Abhishek Lahiri
no flags Details

  None (edit)
Description Abhishek Lahiri 2008-07-31 16:34:28 EDT
Description of problem:

Yesterday we noticed that in one of our servers odbcsql command was just
hanging. Stracing the offending process I found that  it was constantly calling
the times system call times(NULL) and getting a negative value. The process was
not failing a few days back and the system was up for around 212 days , so we
rebooted it and then odbcsql ran successfully. I tried to find any known issues
or bug but could not find any.

Version-Release number of selected component (if applicable):

cat /etc/redhat-release
Red Hat Enterprise Linux AS release 4 (Nahant)

uname -a
Linux sc-sbl8app-d1 2.6.9-55.ELsmp #1 SMP Fri Apr 20 16:36:54 EDT 2007 x86_64
x86_64 x86_64 GNU/Linux

How reproducible:

Probably if the system date is changed and thereby uptime is increased to +200
then it may be reproducible.

Steps to Reproduce:
Actual results:

Expected results:

Additional info:
Comment 1 Abhishek Lahiri 2008-07-31 16:34:28 EDT
Created attachment 313130 [details]
Strace of failed and successful odbcsql commands
Comment 2 Jakub Jelinek 2008-07-31 16:47:08 EDT
Only (clock_t) -1 is special return value, saying the call failed, all other
values, both positive and negative, are valid and just fine.
So if the odbcsql process hangs because of this, it is broken.
Comment 3 Abhishek Lahiri 2008-07-31 17:04:40 EDT
Under what conditon  can times(NULL) return a -ve value? Just curious because I
could not find any more details on this.

Note You need to log in before you can comment on or make changes to this bug.