Intermittent Hang Of Web Cache And Automatic Restart By OPMN
(Doc ID 1205054.1)
Last updated on APRIL 28, 2022
Applies to:
Web Cache - Version 11.1.1.1.0 to 11.1.1.2.0 [Release Oracle11g]Linux x86
Symptoms
Web Cache restarts unexpectedly.
This is verified in the Web Cache event_log which shows (snippet) -
[2010-06-22T10:32:05+02:00] [webcache] [TRACE:32] [WXE-13605] [main] [ecid: ] Signal SIGTERM caught
[2010-06-22T10:32:05+02:00] [webcache] [NOTIFICATION:1] [WXE-09703] [main] [ecid: ] Stop Issued. The program will shut down after all accepted requests are served, or a timeout occurs.
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[2010-06-22T10:32:06+02:00] [webcache] [NOTIFICATION:1] [WXE-08514] [logging] [ecid: ] Cache server process ID 32110 is shutting down.
[2010-06-22T10:32:43+02:00] [webcache] [NOTIFICATION:1] [WXE-08513] [logging] [ecid: ] Cache server process ID 19508 is starting up.
[2010-06-22T10:32:43+02:00] [webcache] [NOTIFICATION:1] [WXE-09612] [main] [ecid: ] Oracle Web Cache 11g (11.1.1), Build 11.1.1.1.0 090603.1900
[2010-06-22T10:32:43+02:00] [webcache] [NOTIFICATION:1] [WXE-09403] [main] [ecid: ] Maximum number of file/socket descriptors set to 5945.
[2010-06-22T10:32:43+02:00] [webcache] [NOTIFICATION:1] [WXE-13002] [config] [ecid: ] Maximum allowed incoming connections are 2000
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[2010-06-22T11:23:55+02:00] [webcache] [TRACE:32] [WXE-13605] [main] [ecid: ] Signal SIGTERM caught
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[2010-06-22T11:41:48+02:00] [webcache] [TRACE:32] [WXE-13605] [main] [ecid: ] Signal SIGTERM caught
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At the same time, the console_WebCache_1.log shows the standard restart message:
10/06/22 10:32:05 Stop process
Web Cache auto-restart monitor signaled to stop.
Web Cache cache server signaled to stop.
The OPMN log files opmn.log and debug.log show a ping timout error:
eg
[2010-06-24T11:27:33][opmn][TRACE:1][][OPMN][code:libopmnwc]Process Ping Failed: webcache1~WebCache~WebCache~1 (757285066:8215) [The connection receive timed out]
[2010-06-24T11:28:23][opmn][TRACE:1][][OPMN][code:libopmnwc]Process Ping Failed: webcache1~WebCache~WebCache~1 (757285066:8215) [The connection receive timed out]
[2010-06-24T11:29:13][opmn][TRACE:1][][OPMN][code:libopmnwc]Process Ping Failed: webcache1~WebCache~WebCache~1 (757285066:8215) [The connection receive timed out]
[2010-06-24T11:29:13][opmn][TRACE:1][][OPMN][code:libopmnwc]Process Unreachable: webcache1~WebCache~WebCache~1 (757285066:8215)
[2010-06-24T11:29:13][opmn][TRACE:1][663][OPMN][code:pm-process]Stopping Process: webcache1~WebCache~WebCache~1 (757285066:8215)
[2010-06-24T11:30:13][opmn][TRACE:1][663][OPMN][code:pm-process]Stopping Process: webcache1~WebCache~WebCache~1 (757285066:8215)
[2010-06-24T11:30:13][opmn][TRACE:1][][OPMN][code:libopmnwc]Forcefully Terminating Process: webcache1~WebCache~WebCache~1 (757285066:8215)
[2010-06-24T11:30:15][opmn][TRACE:1][662][OPMN][code:pm-process]Starting Process: webcache1~WebCache~WebCache~1 (757285066:0)
If Web Cache is set to use the more detailed logging level of Trace, then messages showing which look like the following may be seen in the event_log (the detailed log level of Trace has the overhead of producing a very large log file):
[Thu Sep 10 07:29:14 2009] [event log] [Open] [HeaderBad] [<INSTANCE_HOME>/diagnostics/logs/WebCache/webcache_ucm/event_log]
Ensure there are no cron jobs which are configured to impose a restart, which would result in the same symptoms.
Changes
Cause
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In this Document
Symptoms |
Changes |
Cause |
Solution |
References |