SAP E-Sourcing application hangs frequently running on AS Java

[Amarnath]

Hello Experts,

I need some inputs to better analyze one on-going issue. Here is the situation.

We have an E-Sourcing application running on top of AS Java spread on 4 app servers. Here, more often we see the URL or Application of a specific app server hangs and it displays an error message as page cannot be displayed. But, whereas NWA pages of specific app servers load obsoletely fine. At exact same time all users connected to specific app server turns as “Guest” users. This can be seen via SAP MMC – AS Java web Sessions.

To make the application available we have to restart app server affected and then the application runs as usual.

To analyze, we have taken snapshots of that instance at hang situation and collected all the default traces, security logs, dev_icm logs, eso.logs, eso.trc files, etc., but we did not find any issue recorded and everything seems normal.

Out of snapshots we have collected we have analyzed that this situation is arising due to long running threads and they are not closing after 3600 sec the time set for timeout. In threads we can see FCA failed to allocate new thread and AS Java was not able to process new request. Astonishingly we see each session was hanging around for more than 24 hours, as it was supposed to get killed after 3600 sec inactivity.

Now, to remediate the situation we are starting/stopping SAP System on daily basis so we are not running into such issues.

Please help me on how to overcome this issue.

Regards,

Amarnath

[former_member108703 · Accepted solution]

Hello Amarnath,

You can generate thread dumps which contains that on what exactly are the threads hanging. This SAP Wiki describes how You can generate thread dumps:

https://wiki.scn.sap.com/wiki/display/ASJAVA/%28JSTTSG%29%28Deploy%29Thread+Dump

The dumps will be written to the std_serverX file or into a separate file.

Zoltan