Bug 56898
| Summary: | httpd threads go zombie with large PHP LDAP queries | ||
|---|---|---|---|
| Product: | [Retired] Red Hat Linux | Reporter: | Darren Gamble <darren.gamble> |
| Component: | php | Assignee: | Phil Copeland <copeland> |
| Status: | CLOSED RAWHIDE | QA Contact: | David Lawrence <dkl> |
| Severity: | high | Docs Contact: | |
| Priority: | medium | ||
| Version: | 7.2 | ||
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | i686 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2001-12-07 23:57:00 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: | |||
Humm I may have something odd going on at my end, but I'm trying your script with 4.1.2 Should be in the rawhide tree tonight, I strongly suggest rebuilding it from the SRPM as theres no guarentee that the libs that are constanly moving in rawhide will reflect your own setup. Should be in rawhide by 03:00est tonight Phil =--= |
From Bugzilla Helper: User-Agent: Mozilla/4.0 (compatible; MSIE 5.5; Windows NT 5.0) Description of problem: After querying an LDAP database for a large number of entries with a PHP script, the httpd process does not terminate, holding onto a large amount of memory (in this case, about 110MB). Repeated calls to the program zombify additional processes and use more memory, until none are available. Version-Release number of selected component (if applicable): How reproducible: Always Steps to Reproduce: 1. Start apache w/ php, ldap server. 2. Run PHP script which queries server for objectclass=* 3. Note that process doesn't quit and can't be killed, other than kill -9. 4. Repeat process, note that server stops serving requests. Actual Results: The httpd processes used most of the memory on the machine and stopped serving requests. They could not be kill-ed unless they were kill -9'ed. Using /etc/init.d/httpd stop will work, but only if it is run twice (both will return "OK", however). After the processes are finally removed, the memory they used become available. Expected Results: The process should have terminated normally. Additional info: Running php-4.0.6-7 under apache-1.3.20-16, installed with Redhat 7.2 RPMs (default configuration). The LDAP server has about 8k entries with an ldif that is around 8MB in size. This may not be restricted to LDAP and may instead just be a problem with PHP using a large amount of memory; the httpd process uses over 100MB of memory when the query is done. Smaller queries on the server do not produce this problem. Sample Apache error log entry when an attempt to shut it down is made: [warn] child process 6179 still did not exit, sending a SIGTERM Code snippet is included for verboseness: <?php echo" <HTML> <HEAD> <META HTTP-EQUIV=\"expires\" CONTENT=\"0\"> </HEAD> <BODY BACKGROUND='/images/blue_sidebar.jpg' BGPROPERTIES='fixed'> <LINK rel='stylesheet' href='/stylesheets/main.css' src='/stylesheets/main.css'> <BR> "; $query = "objectclass=*"; echo "<H1>Raw LDAP Test</H2>\n"; echo "<OL>"; echo "<LI>Starting query \"".$query."\"...<BR>"; $start_time = posix_times(); // Connect and bind $ldap_link_id = @ldap_connect("localhost"); $ldap_bind_id = ldap_bind ($ldap_link_id,"cn=Manager,o=Shawtest,dc=shaw,dc=ca","d8bxl3"); // Actually do the query $search_session = ldap_search ($ldap_link_id, "o=Shawtest,dc=shaw,dc=ca" , "$query" ); if ( $search_session ) { $search_results = ldap_get_entries($ldap_link_id,$search_session); } else { die("Test failed. "); } $end_time = posix_times(); ldap_free_result($search_session); $elapsed_time = ($end_time['ticks'] - $start_time['ticks']) / 100.0; echo "Done. Elapsed time: <B>".$elapsed_time."s</B>. <B>".$search_results ['count']."</B> results returned.<BR><BR></LI>\n"; $search_results = array(); ldap_unbind($ldap_link_id); echo "</OL><P>Test completed.</P> </BODY> </HTML> "; ?>