on 07-01-2005 5:29 PM
I have installed WEB AS ABAP + JAVA. For some reason J2EE engine is not up after the Java installation. How to I start and stop J2EE engine. The visual Admin is not connecting either saying connection lost.
I am running on Linux
thanks
Hi all,
I had the same error and it was just an stupid error in our case which I did want to share (you'll never know it might be the same problem in your case).
the reason that jcmon gives the error 'Can't attach to administration shared memory' is very logical. When the J2EE server hasn't started, jcmon can't reach its shared memory since it isn't there. Therefore this error does not mean anything else then look further why the j2ee server didn't start. The problem in our case was however that all the j2ee logs weren't filled so without error messages it will be difficult to solve the problem. And since the Abap system did startup succesfully I didn't had to look it those logs.
Finally after one day of irritation we found our reason. We changed something in the Abap Profiles, it is still unsure how it happend but with the change to the profile, the entries for STARTING the j2ee server disappeared. This way the j2ee server will never start, jcmon will only give errors because of this and the other log files will not be filled since they are not called!
The entries I am talking about are, for example: ms/server_port_0
jstartup/instance_properties
SDM_PROPERTIES
INSTANCE_PROPERTIES
jstartup/vm/home
exe/jlaunch
jstartup/protocol
jstartup/trimming_properties
icm/HTTP/j2ee_0
rdisp/frfc_fallback
rdisp/j2ee_timeout
rdisp/j2ee_start
rdisp/j2ee_start_control
rdisp/start_icman
If these are missing in your system, then that is the problem for sure. To solve the problem you have to logon to an working system and check the parameters there and adjust them to you parameters. If you have any questions, please feel free to mail me at nico.van.der.linden@logicacmg.com.
Hope this is usefull for you guys!
Kind regards,
Nico van der Linden...
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We are running on HP-UX and there are 2 ways to start the Java server. Go to the Abap stack to transaction SMICM and then take the menu path Administration then choose J2EE server => Send soft shutdown => with restart.
you will see messages in the System log transaction SM21 that the Java server was set to shutdown and then you will see messages about the restart...
I Look in the work directory for any errors on startup of the Java server. The work directory is /usr/sap/<SID>/DVEBMGS##/work
Option 2 is the unix command jcmon in the SAP executable directory /sapmnt/<SID>/exe but can only be used when the java server is up and you want to take down the SDM or server threads.
you would issue the following command jcmon pf=<instance profile>
I hope this helps
then 20 for
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