WebLogic Plugin issue in HP Apache caused the HP Apache to become unresponsive

[Shivkumar]

Hi,

We are using Apache web server and WebLogic plugin to connect to WebLogic Server managed instances in the weblogic cluster.

We are running HP Apache version 2.0.48 on HPUX 11i v1 and WebLogic 7.x on HPUX 11i v1.
WebLogic plugin has been configured in "httpd.conf" configuration file to connect to the managed instances of the WebLogic servers.

It has been observed that unavailability of the weblogic managed instances in the weblogic cluster caused apache web servers to become unresponsive or hung.

We also see the error on the browser "Failure of server APACHE bridge".

Appreciate if someone can shed some light on it.

Thanks,
Shiv

[Steven E. Protter]

Shalom Shiv,

Suggestions:
Check the error_log and access_log when this is happening. There may be further insite to be had.

Is the combination of 2.0.48 Apache an approved combination?

What do the logs of weblogic have to say?

What does /var/adm/syslog/syslog.log say?

Basically this is an investigation. Its time to gather the information and look at it. Bring some of the nuggets to this thread and someone may notice the same symptoms and help you solve the issue.

SEP

[Arunvijai_4]

Hi Shiv,

First of all, you need to find why Weblogic clusters became unresponsive, that should be a good start for a complete RCA.

Also, as SEP suggested, you can take a look at apache.log for any connector issues related error messages.

You can use Node manager to configure weblogic clusters.

-Arun

[Sung Oh]

Hi Shiv,

Weblogic on HPUX has some known issues and Apache hang is one of them. if you can consider "e-docs.bea.com" website under support, it should have list of known issues and how to fix them.

one configuration that I would look for is your kernel settings. if you can compare your HPUX server kernel setting with weblogic recommanded kernel setting will be good starting point to fix your problem.

I hope this helps,

Sung