Java stack stop

[Former Member]

Hi

Please give me sequence of checking if java system not starting up..

How can i find the cause of error and what are the file sequence to follow in Work directory. Do i need to follow the any other way.

Regards,

Kumar.

[Former Member · Accepted solution]

Hi,

Check the server0.log file in the usr/sap/sid/instance/j2ee/cluster/server0/log/system

Regards,

Vamshi.

[Former Member]

Hi Kumar,

In the case of an error or unexpected behavior of the Startup and Control

Framework(JAVA stack), it is important to check the following trace and log files:

-> dev_jcontrol

-> dev_<node name>, such as dev_dispatcher

-> jvm_<node name>.out, such as jvm_dispatcher.out

devjcontrol_

is the trace file for the JControl process. dev_jcontrol is the most important

trace file for problem messages when starting the entire Java instance.

Current messages are written at the end of the file.

dev<node name>_

is the trace file for JLaunch processes. The trace file dev_<node name> is

written for each started JLaunch process, and therefore, for every dispatcher

and server process.

jvm<node name>.out_

is the output file for the Java Virtual Machine (JVM). This JLaunch process

represents a Java node such as a dispatcher or a server and therefore, a JVM.

The output of a JVM is forwarded to the file jvm_<node name>.out in the

work directory of a Java instance.

For all of the listed log files, you will also find log files in the work directory with the ending .old, which can also often be used for troubleshooting.

Hope it clears your doubt.

Thanks

Kishore

[Former Member]

It depends. you may need to search a lot of log files to find out the exact reason.

You can check:

Check the usr/sap/sid/instance/work directory log files like dev_server0 , dev_disp , etc for errors.

Check usr/sap/sid/instance/j2ee/cluster/server0/ default trace for errors

Check usr/sap/sid/instance/j2ee/cluster/server0/log/system server0.log for errors.

One of these should help you find the root cause.

Cheers,

Jazz