Debug Carbon server when it is started as a daemon

WSO2 Carbon Server can be run as a daemon on Unix/Linux systems. Say for instance that you need to remote debug the server when it is started as a daemon. This blogpost will be discussing $subject.

1) Open up the wrapper.conf file.

heshan@heshan-ThinkPad:~/Dev/customer/wso2esb-3.0.1/bin$ vim ../repository/conf/wrapper.conf

2) Add following entries to the wrapper.conf.

wrapper.java.additional.20=-Xdebug
wrapper.java.additional.21=-Xnoagent
wrapper.java.additional.22=-Djava.compiler=NONE
wrapper.java.additional.23=-Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=5005

3) Start the ESB as a daemon.

heshan@heshan-ThinkPad:~/Dev/customer/wso2esb-3.0.1/bin$ ./wso2server.sh start
Starting WSO2 ESB v3.0.1...

4) Start the debugger.

5) Monitor the log.

heshan@heshan-ThinkPad:~/Dev/customer/wso2esb-3.0.1/bin$ tail -f ../repository/logs/wrapper.log
INFO   | jvm 1    | 2010/11/24 11:35:09 |   object space 84224K, 76% used [0x00007fbfcff20000,0x00007fbfd3e0dff0,0x00007fbfd5160000)
STATUS | wrapper  | 2010/11/24 11:35:09 | <-- Wrapper Stopped STATUS | wrapper  | 2010/11/24 11:45:46 | --> Wrapper Started as Daemon
WARN   | wrapper  | 2010/11/24 11:45:46 | ------------------------------------------------------------------------
WARN   | wrapper  | 2010/11/24 11:45:46 | The JVM is being launched with a debugger enabled and could possibly be
WARN   | wrapper  | 2010/11/24 11:45:46 | suspended.  To avoid unwanted shutdowns, timeouts will be disabled,
WARN   | wrapper  | 2010/11/24 11:45:46 | removing the ability to detect and restart frozen JVMs.
WARN   | wrapper  | 2010/11/24 11:45:46 | ------------------------------------------------------------------------
STATUS | wrapper  | 2010/11/24 11:45:46 | Launching a JVM...
INFO   | jvm 1    | 2010/11/24 11:45:46 | Listening for transport dt_socket at address: 5005
INFO   | jvm 1    | 2010/11/24 11:45:56 | Wrapper (Version 3.2.3) http://wrapper.tanukisoftware.org
INFO   | jvm 1    | 2010/11/24 11:45:56 |   Copyright 1999-2006 Tanuki Software, Inc.  All Rights Reserved.
INFO   | jvm 1    | 2010/11/24 11:45:56 |
INFO   | jvm 1    | 2010/11/24 11:45:56 | [2010-11-24 11:45:56,845]  INFO - Main Initializing system...

Now you have successfully debugged the Carbon Server, when it is started as a daemon.