MOD_WL - Apache 2 frontend stuck when one of Weblogic Servers stuck

We are using an Apache 2 Web Server as a frontend of our Weblogic Server 10.3.2 installations,
using mod_wl configured as follow:
<Location "/csi">
WebLogicHost jerico.procergs.reders
WebLogicPort 8012
SetHandler weblogic-handler
ErrorPage http://www.consultasintegradas.rs.gov.br/FalhaConexao.html
</Location>
The Weblogic Server is using a default workmanager.
When Weblogic Server gets overload by "stuck threads", "out of memory", "connection pool out of
resources" or similar reasons, the Apache Web server always get stuck with many slots in WAIT
state. This stops acess to all Weblogic Servers installations, until restart the Weblogic server
which was stuck.
Is there another way to configure Apache as a Weblogic frontend without Apache stuck toguether
with any Weblogic under it ?
There are timeout parameter to be configured in mod_wl not to stuck Apache when Weblogic stuck ?
Thanks in advance
Mauro do Valle

Hi,
The best way to get rid of your issue is by try to do the following stuff:
- Use more WLS servers which are in cluster in different boxes. (i.e. This would help you to load-balancing and fail-over your request )
- Use "*WebLogicCluster*" instead of "WebLogicHost" as you have to give the host-names of the servers which are in the cluster
- By default "*Idempotent*" is ON and this is used for fail-over after *300* seconds as that's the default value for "*WLIOTimeoutSecs*" (i.e. if an response is not been sent by one WLS server for any-reason, then the response would be sent to the second server. ) This way if any one of the server has gone down for some reason and was not able to send the repose then second server would server the requests.
Following is the example:
<Location "/csi">
WebLogicCluster MS1HostName:7003,MS2HostName:7005
SetHandler weblogic-handler
ErrorPage http://www.consultasintegradas.rs.gov.br/FalhaConexao.html
</Location>For more information about the parameters have a look at the below link:
http://download.oracle.com/docs/cd/E12840_01/wls/docs103/plugins/plugin_params.html#wp1143049
Regards,
Ravish Mody
http://middlewaremagic.com/weblogic/
Come, Join Us and Experience The Magic…

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