How to restart Java Engine in ABAP+JAVA dual stack installation ?

[pr_srinivas]

Dear Experts

if i use stopsap r3 in this dual stack installation - it stops both ABAP & JAVA Web Application Servers.

I want to restart only JAVA Weba pplication server.

How do it ?

Thaks in Advance !

Rgds

[former_member185954 · Accepted solution]

Hello,

There is no option using command line for stopping J2EE explicitly. For dual stack systems, there exists an option in UNIX

stopsap J2EE and its equivalent startsap J2EE

however they are both synonymous to start/stopsap r3

However SMICM transaction allows you to perform two types of stop/starts.

1. Log on to the ABAP stack of SAP NetWeaver.

2. Open the list of SAP servers by calling transaction SM51.

3. Double-click the instance for which you want to restart the Java stack.

You are now connected to the selected instance.

4. Start the ICM Monitor (transaction SMICM) by entering /nSMICM in the command field.

5. In transaction SMICM, choose Administration -> J2EE Server -> Send Soft Shutdown -> With Restart.

6. The corresponding SAP NetWeaver Java stack for your instance is stopped and restarted.

Regards,

Siddhesh

[pr_srinivas · Accepted solution]

Marked as answered with 10 reward points.

But i am more in need to know how to do it from OS level.

Becuase my requirement some time demands only JAVA Stack & Sonme times Only ABAP Stack availability

in a Dual Stock installation how to keep available only Java Web AS

Regards

[Former Member · Accepted solution]

Hi

As far as my understanding, you cannot stop ABAP and work on Java in dual stack. Because Java stack sits on ABAP stack. And if you stops ABAP, java would not work stand alone.

[former_member185954 · Accepted solution]

Hello Srinivas,

You performed a dual stack installation when you installed your SAP Netweaver so you cannot operate them individualy.

You may shutdown the java when required, but ABAP if you shutdown, it would bring down the J2EE with it.

Since your J2EE databases uses the same DATABASE that ABAP uses.

You could install your J2EE application seperately in a new installation and then point it to your ABAP instances for any data that you might need.

But that would be a carefully planned excercise in itself.

Regards,

Siddhesh

[pr_srinivas · Accepted solution]

But theoritically they are 2 indpeendent installations like

AS ABAP

AS JAVA

..Do you aggree ?? really am not good on basics!!

During the installation also - if select AS ABAP & AS JAVA - it will become dual installation

and it does not show

any dependency while installing that AS JAVA requires AS ABAP.[Installation Component Selection and Dependency Screen shot|http://i303.photobucket.com/albums/nn153/S0002919350/SAP%20Issues/Oracle_Patches.jpg]

Installation Component Selection and Dependency Screen shot

Is it because if AS ABAP is down - AS JAVA UME is 001 client - and Java authentication fails ?

Can we de attatch from ABAP UME for my requirement like - running JAVA WAS alone w/o ABAP.

Regards

PR

Regards

Edited by: P.R. SRINIVAS on Jun 16, 2008 4:15 PM

[former_member185954 · Accepted solution]

Yes i think this can be done, don't remember the procedure though.

[Former Member]

HI

Try to use the SMICM tcode to restart J2EE Engine.

Go to Administration and you would get the options