Bug 40627
| Summary: | UMC-Server: crashed during session timeout | ||
|---|---|---|---|
| Product: | UCS | Reporter: | Florian Best <best> |
| Component: | UMC (Generic) | Assignee: | Florian Best <best> |
| Status: | CLOSED FIXED | QA Contact: | Sönke Schwardt-Krummrich <schwardt> |
| Severity: | normal | ||
| Priority: | P5 | CC: | walkenhorst |
| Version: | UCS 4.1 | Flags: | best:
Patch_Available+
|
| Target Milestone: | UCS 4.1-1-errata | ||
| Hardware: | Other | ||
| OS: | Linux | ||
| What kind of report is it?: | --- | What type of bug is this?: | --- |
| Who will be affected by this bug?: | --- | How will those affected feel about the bug?: | --- |
| User Pain: | Enterprise Customer affected?: | ||
| School Customer affected?: | ISV affected?: | ||
| Waiting Support: | Flags outvoted (downgraded) after PO Review: | ||
| Ticket number: | Bug group (optional): | Error handling | |
| Max CVSS v3 score: | |||
| Attachments: | patch | ||
Created attachment 7463 [details]
patch
univention-management-console.yaml: r67540 | YAML Bug #40627 Bug #40658 univention-management-console (8.0.28-12): r67537 | Bug #40627: fix UMC-Server crash during session timeout Was unable to reproduce the exact code path, so I did a dry-run check in interactive python shell: >>> import os >>> pid = 32300 >>> module_name = 'MyMod' >>> try: ... os.kill(pid, 9) ... except OSError as exc: ... print 'Failed to kill module %s: %s' % (module_name, exc) ... Failed to kill module MyMod: [Errno 3] No such process >>> OK: code change (OK): functional test REOPEN: YAML (should be delivered only for UCS 4.1-1) → version: [1] (In reply to Sönke Schwardt-Krummrich from comment #3) > REOPEN: YAML (should be delivered only for UCS 4.1-1) → version: [1] Done. OK: YAML |
The UMC-Server crashed during a module session timeout (race condition). This happened in a ucs-school-test. 09.02.16 22:33:47.302 MODULE ( INFO ) : Executing ['computerroom/room/acquire'] 09.02.16 22:33:47.302 RESOURCES ( INFO ) : Searching for module providing command computerroom/room/acquire 09.02.16 22:33:47.302 RESOURCES ( INFO ) : Found module computerroom 09.02.16 22:33:47.302 MAIN ( INFO ) : Starting new module process and passing new request to module computerroom: 145507521866475-86 09.02.16 22:33:47.302 MAIN ( PROCESS ) : running: ['/usr/sbin/univention-management-console-module', '-m', 'computerroom', '-s', '/var/run/univention-management-console/3798-1455075227302.socket', '-d', '4', '-n', 'qt', '-l', 'de_DE.UTF-8'] 09.02.16 22:33:47.352 MAIN ( PROCESS ) : module schoolgroups is still running - purging module out of memory 09.02.16 22:33:47.397 MAIN ( ERROR ) : Traceback (most recent call last): File "/usr/sbin/univention-management-console-server", line 226, in <module> umc_daemon.do_action() File "/usr/lib/pymodules/python2.7/daemon/runner.py", line 186, in do_action func(self) File "/usr/lib/pymodules/python2.7/daemon/runner.py", line 131, in _start self.app.run() File "/usr/sbin/univention-management-console-server", line 203, in run notifier.loop() File "/usr/lib/pymodules/python2.7/notifier/nf_generic.py", line 286, in loop step() File "/usr/lib/pymodules/python2.7/notifier/nf_generic.py", line 242, in step if not timer[ CALLBACK ](): File "/usr/lib/pymodules/python2.7/notifier/__init__.py", line 104, in __call__ return self._function( *tmp, **self._kwargs ) File "/usr/lib/pymodules/python2.7/univention/management/console/protocol/session.py", line 313, in _purge_child os.kill(pid, 9) OSError: [Errno 3] Kein passender Prozess gefunden