Bug 977284

Summary:	symbol lookup error 'pthread_atfork' while using tcmalloc
Product:	[Fedora] Fedora EPEL	Reporter:	Erik <erik>
Component:	google-perftools	Assignee:	Tom "spot" Callaway <tcallawa>
Status:	CLOSED ERRATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	el6	CC:	joe, tcallawa
Target Milestone:	---
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	gperftools-2.0-11.el6.3	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2013-08-01 20:42:49 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Erik 2013-06-24 08:30:53 UTC

Description of problem:

Since the update of gperftools-libs from 2.0.3 to 2.0.11 we are getting a symbol lookup error. 

For instance when using the library in mysql 5.5, we see the following in /var/log/mysqld.log:

nohup: symbol lookup error: /usr/lib64/libtcmalloc_minimal.so.4: undefined symbol: pthread_atfork


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

2.0.11 (could be in earlier version as well). 


How reproducible:

Always. Configure tcmalloc as library in my.cnf using 



Steps to Reproduce:

Alternative 1 (using mysql):
1. configure in /etc/my.cnf (using oracle mysql 5.5 version)
   malloc-lib=/usr/lib64/libtcmalloc_minimal.so.4
2. restart mysql: /etc/init.d/mysql restart
3. mysql will refuse to start. Examine /var/log/mysqld.log


Alternative 2 (easier):
1. In a bash shell: 

   export LD_PRELOAD=/usr/lib64/libtcmalloc.so.4
2. cat ~/.bashrc # any file will do. 
3. screen will show symbol lookup error for pthread_atfork.

Actual results:

Symbol lookup error. 

Expected results:

Alternative 1: mysql starts
Alternative 2: output of file is shown. 

Additional info:

This broke after a recent update of the system packages. The problem manifests itself with the most recent packages of centos 6.4 and epel.

Comment 1 Erik 2013-06-24 19:15:45 UTC

I can confirm that rolling back to version 2.0-3 from 2.0-11 fixes the issue so it is indeed related to gperftools-libs only. 

I have worked around the issue by creating my own RPM that obsolets the gperftools-libs RPM and repackages the 2.0-3 files.

Comment 2 Joe Uhl 2013-06-26 19:44:36 UTC

We run MySQL with tcmalloc and hit this today.  Thankfully in a pre-production environment.  Installing MySQL and gperftools-libs on a fresh system results in a non-starting MySQL instance.  Downgrading also worked for us.

Comment 3 Fedora Update System 2013-07-10 20:23:01 UTC

gperftools-2.0-11.el6.3 has been submitted as an update for Fedora EPEL 6.
https://admin.fedoraproject.org/updates/gperftools-2.0-11.el6.3

Comment 4 Fedora Update System 2013-07-12 19:41:47 UTC

Package gperftools-2.0-11.el6.3:
* should fix your issue,
* was pushed to the Fedora EPEL 6 testing repository,
* should be available at your local mirror within two days.
Update it with:
# su -c 'yum update --enablerepo=epel-testing gperftools-2.0-11.el6.3'
as soon as you are able to.
Please go to the following url:
https://admin.fedoraproject.org/updates/FEDORA-EPEL-2013-10836/gperftools-2.0-11.el6.3
then log in and leave karma (feedback).

Comment 5 Fedora Update System 2013-07-16 01:05:41 UTC

Package gperftools-2.0-11.el6.3, libunwind-1.1-2.el6:
* should fix your issue,
* was pushed to the Fedora EPEL 6 testing repository,
* should be available at your local mirror within two days.
Update it with:
# su -c 'yum update --enablerepo=epel-testing gperftools-2.0-11.el6.3 libunwind-1.1-2.el6'
as soon as you are able to.
Please go to the following url:
https://admin.fedoraproject.org/updates/FEDORA-EPEL-2013-10836/libunwind-1.1-2.el6,gperftools-2.0-11.el6.3
then log in and leave karma (feedback).

Comment 6 Fedora Update System 2013-08-01 20:42:49 UTC

gperftools-2.0-11.el6.3, libunwind-1.1-2.el6 has been pushed to the Fedora EPEL 6 stable repository.  If problems still persist, please make note of it in this bug report.