SAP system is closed but jlaunch still active

[former_member183984]

Hi

My SAP solution manager dual stack system 7.1 is close for the moment. but still I see jlaunch process active with high amount of memory using almost 1.5 gb

I have other IDES systems on the host and performance is affected

Please guide

[former_member185239 · Accepted solution]

Hi Adrien,

Since your system is down then you can kill the jlaunch process manually.

With Regards

Ashutosh Chaturvedi

[divyanshu_srivastava3]

Hi Adrien,

Do ps -ef | grep jlaunch and show me the output ?

Also, check the PID of this process, the date and the exe location of it.

If it a non-running process, then use cleanipc and remove this process.

Regards,

[former_member183984]

sorry forgot to mention, its a windows 2012 system

but thanks for the suggestion

[divyanshu_srivastava3]

You could have done the similar things in Windows too.

[hemanth2]

Hi Adrien ,

Hope you are doing good.

Just goto task manager and kill Jlaunch.

The most likely reason why this issue occurs is cause perhaps the server wasn't shut down correctly (using SAPMMC).
Else, a kernel upgrade will be helpful as it will update the JLAUNCH binaries (just a disp+work update too will suffice).

The below links will help you if there are any queries with the kernel update procedure:

SAP Note No. 1636252 - Installing a 7.20 kernel in SAP Web AS 7.00/7.01/7.10/7.11

SAP Note No. 1629598 - SAP Kernel 720 will replace older kernel versions

SAP Note No. 19466 - Downloading SAP kernel patches

Also check:

http://scn.sap.com/docs/DOC-1206

(for Manual Kernel Upgrade)

and

http://www.sdn.sap.com/irj/scn/weblogs?blog=/pub/wlg/11219

(for kernel upgrade using JSPM)

____________

Kind Regards,

Hemanth

SAP AGS

[former_member183984]

Thanks a lot Hemanth... much appreciated..

I am planning to do JVM switch, i Guess that is something to start with.. as anyways even with solman on, jlaunch is taking a lot of memory..

thanks again

[former_member185239]

Hi Adrien,

You can take out heap dump and thread dump for the java system to check the memory consumption

in sap system by a particular thread or the process.

With Regards

Ashutosh Chaturvedi

[hemanth2]

Hi Adrien ,

I would worry only if JLAUNCH is taking more CPU usage when the server is up.

JLaunch starts a Java program. It loads the JVM into its own address space and then represents the required cluster element. The program can receive notification from the JControl process via named pipes to stop the cluster element, and terminates, if the JControl stops running (fork emulation under Windows).

The Jlaunch consuming high CPU time means that server, dispatcher or bootstrap process consume it.  Hence we need to check this part if the JLaunch is taking high CPU when the server is running.

Kind Regards,
Hemanth