Bug 525206
| Summary: | php-snmp leaks memory on httpd restart | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 5 | Reporter: | Issue Tracker <tao> |
| Component: | php | Assignee: | Joe Orton <jorton> |
| Status: | CLOSED WONTFIX | QA Contact: | BaseOS QE <qe-baseos-auto> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 5.4 | CC: | ddumas, jwest, mpoole, tao |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2012-01-17 17:52:09 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
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Description
Issue Tracker
2009-09-23 16:29:11 UTC
Event posted on 2009-09-23 08:17 BST by nbansal Description of problem: Apache memory usage increases with each Apache reload when php-snmp is installed. Customer is reloading apache every five minutes. The specific reason Apache is getting reloaded every five minutes is to update the list of virtual servers found in httpd-vhosts.conf. Packages I used to reproduce it: httpd-2.2.3-31.el5 php-snmp-5.1.6-23.2.el5_3 In the output of watch "ps aux| grep httpd" increment in memory utilization is visible: Every 2.0s: ps aux | grep httpd Wed Sep 23 03:07:20 2009 root 9651 1.0 7.8 230444 20616 ? Ss 03:04 0:01 /usr/sbin/httpd apache 9919 0.0 5.9 230444 15776 ? S 03:07 0:00 /usr/sbin/httpd apache 9920 0.0 5.9 230444 15776 ? S 03:07 0:00 /usr/sbin/httpd apache 9921 0.0 5.9 230444 15776 ? S 03:07 0:00 /usr/sbin/httpd apache 9922 0.0 5.9 230444 15776 ? S 03:07 0:00 /usr/sbin/httpd apache 9923 0.0 5.9 230444 15776 ? S 03:07 0:00 /usr/sbin/httpd apache 9924 0.0 5.9 230444 15776 ? S 03:07 0:00 /usr/sbin/httpd apache 9925 0.0 5.9 230444 15776 ? S 03:07 0:00 /usr/sbin/httpd apache 9926 0.0 5.9 230444 15776 ? S 03:07 0:00 /usr/sbin/httpd Every 2.0s: ps aux | grep httpd Wed Sep 23 03:07:33 2009 root 9651 1.1 8.6 232492 22748 ? Ss 03:04 0:01 /usr/sbin/httpd root 9927 0.4 0.4 63576 1152 pts/1 S+ 03:07 0:00 watch ps aux | grep httpd apache 9987 0.0 6.8 232492 17900 ? S 03:07 0:00 /usr/sbin/httpd apache 9988 0.0 6.8 232492 17900 ? S 03:07 0:00 /usr/sbin/httpd apache 9989 0.0 6.8 232492 17900 ? S 03:07 0:00 /usr/sbin/httpd apache 9990 0.0 6.8 232492 17900 ? S 03:07 0:00 /usr/sbin/httpd apache 9991 0.0 6.8 232492 17900 ? S 03:07 0:00 /usr/sbin/httpd apache 9992 0.0 6.8 232492 17900 ? S 03:07 0:00 /usr/sbin/httpd apache 9993 0.0 6.8 232492 17900 ? S 03:07 0:00 /usr/sbin/httpd apache 9994 0.0 6.8 232492 17900 ? S 03:07 0:00 /usr/sbin/httpd When all the memory is consumed apache starts to print following messages in error log: [Mon Sep 21 10:47:01 2009] [error] (12)Cannot allocate memory: fork: Unable to fork new process [Mon Sep 21 10:47:07 2009] [error] (12)Cannot allocate memory: fork: Unable to fork new process If we uninstall php-snmp then memory utilization remains constant. Found following bug but no sure if its related: http://bugs.php.net/bug.php?id=45405 How reproducible: Always. Steps to Reproduce: 1. yum install httpd php-snmp php 2. service httpd start 3. while : ; do sudo /etc/init.d/httpd reload;sleep 5 ; done 4. watch "ps aux | grep httpd" Actual results: All the memory in system is consumed when performing frequent httpd reloads. Expected results: Memory utilization should remain stable. Additional info: Attaching sysreport (10-sosreport-efox.1947864-463633-587a75.tar.bz2) and tar of /etc/httpd ( 20-httpd_conf.tar.bz2 ) Test machine where I reproduced it: 10.65.211.34 root/redhat This event sent from IssueTracker by mpoole [Support Engineering Group] issue 345827 After a visual review of the ext/snmp/snmp.c file would appear to be due to a lack of shutdown function to call the net-snmp snmp_shutdown() function. The current upstream code contains a PHP_MSHUTDOWN_FUNCTION function which does call the snmp_shutdown() routine, but my attempts to patch the current RHEL version all fail to compile due to my unfamiliarity with the requirements in patching php source. In fact we patch out the call to snmp_shutdown(), as a workaround for bug 153988. If you remove the "%patch22 ..." line -snmp will call snmp_shutdown(). Can you try a test package like that? I'm closing this bug out since it's been several years since the last bit of feedback provided on this. If additional feedback is available, please feel free to reopen this bug and continue the conversation. |