Bug 436191
| Summary: | iostat with -n flag continously creates new open file handles. | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 5 | Reporter: | Christopher Karel <chrisk> |
| Component: | sysstat | Assignee: | Ivana Varekova <varekova> |
| Status: | CLOSED ERRATA | QA Contact: | Brian Brock <bbrock> |
| Severity: | low | Docs Contact: | |
| Priority: | low | ||
| Version: | 5.1 | CC: | ddumas, gbradner, syeghiay |
| Target Milestone: | rc | Keywords: | Reopened |
| Target Release: | --- | ||
| Hardware: | x86_64 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2008-10-08 08:07:11 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: | |||
one command patch, no problem - Fast Trackable Fixed in sysstat-7.0.2-1.el5. An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on therefore solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHBA-2008-0899.html (In reply to comment #2) > Fixed in sysstat-7.0.2-1.el5. I have sysstat-7.0.2-3.el5 installed on RHEL 5.3 and it is not fixed. So sorry. Wrong ticket. |
Description of problem: When using the -n flag, iostat creates new open file handles while running, and fails to close them. One new handle opening /proc/<iostat's-PID>/mountstats per interval. Version-Release number of selected components: # rpm -q sysstat sysstat-7.0.0-3.el5 # cat /etc/redhat-release Red Hat Enterprise Linux Server release 5.1 (Tikanga) # uname -a Linux hostname 2.6.18-53.el5 #1 SMP Wed Oct 10 16:34:19 EDT 2007 x86_64 Steps to Reproduce: 1. Run iostat with the -n flag, and an interval value. (EG: iostat -n 1) 2. Use lsof to determine the number of open files for a process. 3. Iostat will eventually crash because of too many open files. Examples: 1. Start an iostat command running in one terminal window: iostat -n 1 2. In another terminal window, monitor open file usage with lsof: lsof -c /iostat/ | wc 3. Rerunning the lsof command above will return with an ever increasing number of open files. 4. After 17 minutes and 2 seconds of running, iostat will crash with the error: "fopen: Too many open files" Output: # time iostat -n 1 > /dev/null & [2] 2525 # lsof -c /iostat/ | wc 22 195 1624 # lsof -c /iostat/ | wc 38 339 2872 # lsof -c /iostat/ | wc 259 2328 20110 # lsof -c /iostat/ | wc 306 2751 23776 # lsof -c /iostat/ | wc 507 4560 39454 # lsof -c /iostat/ | wc 959 8628 74710 # fopen: Too many open files real 17m2.04s user 0m0.08s sys 0m0.94s