Oracle Access Manager 11g/12c Stops Responding To Requests After Some Time
(Doc ID 2349605.1)
Last updated on JULY 03, 2023
Applies to:
Oracle Access Manager - Version 11.1.2.0.0 to 12.2.1.3.180904 [Release 11g to 12c]Information in this document applies to any platform.
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Symptoms
Oracle Access Manager and an Oracle OHS Server in the same server, OHS WebGate is installed on the OHS Server protecting some resources.
In front of this a proxy server. After some time Oracle Access Manager seems to stop processing requests
Querying server health (i.e. through wlst) shows the server as down or unreachable
When the problem occurs then the OAM managed servers has to be restarted in order to restore the service.
If both nodes have the problem at the same time then we face an outage.
The frequence of occurrence is quite different sometimes several times a day.
In order troubleshoot the problem made a setup that use a single node and issue reproduce in single node also
telnet <OAM_HOSTNAME> <OAM_PORT>
when issue happen sometime did not connect anymore, sometime did connect, but no requests were processing.
In WebLogic servers thread dump we find many threads like
Changes
- No Pre-authentication Rules used
- using custom login pages, login page is not deployed on the admin server.
It is deployed on the managed server (and declared as excluded page)
The issue also occurs with only the oracle default login page.
Customer use custom J2EE applications that is deployed on OAM
managed servers together with login page. Custom J2EE applications have on the other features
one that get user attributes from ldap via JSP pages using java JNDI, this involve a little bit processing.
Cause
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In this Document
| Symptoms |
| Changes |
| Cause |
| Solution |
| References |