Error during this APL startup period - PI 7.0 SPS13

Question

When we need to perform some maintenance in an application Server, we are stop this APL. During these steps, no problem in the XI System.
We have the same procedure to startup and we only put APL again, the central instance is not affect and  all XI components will be running well, but during the APL startup, in the SMGW transaction we can see the ID AI_RUNTIME_XP0 for this APL, before all XI components will be available.
This situation is causing a lot of problems in the interfaces. During
this startup period, we can see this error messages
Received XI System Error in Integration Engine. ErrorCode:
JCO_SYSTEM_FAILURE ErrorText:
ErrorStack: "SYSTEM FAILURE" during JCo call. Bean
SMPP_CALL_JAVA_RUNTIME3not found on host apl54, ProgId
=AI_RUNTIME_XP0: P
(In this example, the APL was apl54).
Is there a special procedure to boot the APL ?

Answer 1

Marco
If I understand your question right, you want to know if there is a best practice to stop and restart an application server which is a part of your XI landscape? If my assumptions are right, for the fact that you are trying to bring down an application server means you have more than one app server and they are in a load balanced mode. If yes, you might want to first remove the application server from the RFC group (RZ12) which will prevent any new messages hitting this server. Then, once all the messages that are still under processing in this app server are completed, you can bring the server down, do the maintainance and bring it up. Once up, add it to the RFC group again. Same procedure applies for the java server nodes on this app server as well.
Hope this helps. I should say you haven't been very clear with your questions and hence no reply from other members. We understand your anxiety in not receiving any answers but with a global community like SDN, you might have to give as much information as possible to compensate for language barriers.
Thanks
KK