Bug 45309
| Summary: | Too many open files in UMC | ||
|---|---|---|---|
| Product: | UCS | Reporter: | Stefan Gohmann <gohmann> |
| Component: | UMC (Generic) | Assignee: | Florian Best <best> |
| Status: | CLOSED FIXED | QA Contact: | Eduard Mai <mai> |
| Severity: | normal | ||
| Priority: | P5 | CC: | best |
| Version: | UCS 4.1 | ||
| Target Milestone: | UCS 4.2-2-errata | ||
| Hardware: | Other | ||
| OS: | Linux | ||
| What kind of report is it?: | Bug Report | What type of bug is this?: | 7: Crash: Bug causes crash or data loss |
| Who will be affected by this bug?: | 2: Will only affect a few installed domains | How will those affected feel about the bug?: | 3: A User would likely not purchase the product |
| User Pain: | 0.240 | Enterprise Customer affected?: | |
| School Customer affected?: | Yes | ISV affected?: | |
| Waiting Support: | Flags outvoted (downgraded) after PO Review: | ||
| Ticket number: | 2017071121000575 | Bug group (optional): | |
| Max CVSS v3 score: | |||
| Attachments: |
check-max-open-files.sh
umc_soft_limits.patch |
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After some more debugging, we found that the soft limit for open file descriptors was reached: PID [PROCESS] limit Hard limit Open files [...] 689 [/usr/bin/python2.7/usr/sbin/univention-management-console-serverrestart] 4096 64512 4297 The soft limit is set directly in UMC so that the limits settings are ignored (/etc/security/limits.conf). Created attachment 9161 [details]
check-max-open-files.sh
Simple script to check the max open file settings.
Created attachment 9162 [details]
umc_soft_limits.patch
Patch to increase the soft limit:
patch -p0 -d / <umc_soft_limits.patch
/etc/init.d/univention-management-console-server restart
We introduced this code in Bug #39909. UMC never took any limits from /etc/security/limits.conf. The default value of UCS is: * soft nofile 32768 * hard nofile 32768 but somehow these limits aren't evaluated by python(?) processes. I get the following limits if I remove the code: Max open files 1024 4096 files So I will take Stefans patch. univention-management-console (9.0.80-71): 836f0ab374b7 | Merge branch 'fbest/45309-umc-soft-limits' into 4.2-2 399cddd08e52 | Bug #45309: raise soft limit for max open files of the UMC server univention-management-console.yaml: baa9d275dc8a | YAML Bug #45309 OK, works. UMC Server is able to hold the desired amount of file descriptors as of 9.0.80-71: 27299 [/usr/bin/python2.7/usr/sbin/univention-management-console-serverstart] 64512 64512 64690 VERIFIED |
We received the following UMC abort from a customer environment: 08.07.17 15:36:27.299 MAIN ( ERROR ) : Error during handling a request: Traceback (most recent call last): File "/usr/lib/pymodules/python2.7/univention/management/console/protocol/server.py", line 155, in _receive self._handle(state, msg) File "/usr/lib/pymodules/python2.7/univention/management/console/protocol/server.py", line 204, in _handle Server.reload() File "/usr/lib/pymodules/python2.7/univention/management/console/protocol/server.py", line 457, in reload moduleManager.load() File "/usr/lib/pymodules/python2.7/univention/management/console/module.py", line 391, in load OSError: [Errno 24] Too many open files: '/usr/share/univention-management-console/modules