export CATALINA_HOME=/home/xyz/opt/tomcat
export JPDA_TRANSPORT=dt_socket
export JPDA_ADDRESS=9000

now start tomcat using following command

$ %CATALINA_HOME%/bin/catalina.sh jpda start


Setting this variable in your personal ~/.bashrc file has the advantage that it will always be set (for you, as a user) each time you log in or reboot the system. To do so, open ~/.bashrc in a text editor (or create the file if it doesn’t already exist) and insert the following line anywhere in the file

export CATALINA_HOME=/home/xyz/opt/tomcat
export JPDA_TRANSPORT=dt_socket
export JPDA_ADDRESS=9000

Save and close .bashrc.
You must logout and login again to make your change take effect. or source your .bashrc file to make your change take effect for the current session

$ source ~/.bashrc


1) Go to your catalina_home/bin.
2) You will find a file called tomcat6w.exe
3) double click on the file and a window will be opened.
4) In the opened window, go to “java” tab.You will find a “text area box” with label as “Java Options”

5) Add the following lines of the code at the the beginning of the text area. (I mean above the first -D…)

6) The below are the lines which you need to add.
-Xdebug -Xnoagent -Djava.compiler=NONE
-Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=5005

7) Once you have added go to your eclipse and go to Debug–>Debug Configurations and create a new configuration for your project with the port as 5005 (as given above) and save it.

Now start your tomcat service. You’ll observe at the middle of starting of your service it will become very slow and not responsive. At that time start your already configured debugger. Now you see your server started successfully in debug mode. Remember that as i mention above, if when your service start up is slow and you have not started your eclipse debugger at that time, then your server won’t start and you’ll get some error.

I have spent a lot of time on this and so i am posting it so that, the people who sees this can continue their work from here easily….

You can get away from these warnings by doing one of the following

1. server-api.jar is needed to compile an application and is not required in application war to run application as container already have this file. You must remove this file from WEB-INF/lib.

2. It can be because of other jar files that are bundled with container. e.g. j2ee.jar. You need to remove this file from your application’s lib directory.

In tomcat 6, $CATALINA_HOME/lib/ contains all the jar file which one should not override with those of application’s jar. tomcat 5 has these jars in $CATALINA_HOME/common/lib folder.

$ mkdir ~/opt

Go to the directory where you have downloaded eclipse

$ tar -xvf eclipse-SDK-3.4.1-linux-gtk.tar.gz && mv eclipse ~/opt

Make a bin folder in user’s home directory

$ mkdir ~/bin

Next create an executable for Eclipe at ~/bin/eclipse

$ vi ~/bin/eclipse

Add the following lines in this file

export MOZILLA_FIVE_HOME="/usr/lib/mozilla/"
export ECLIPSE_HOME="$HOME/opt/eclipse"
$ECLIPSE_HOME/eclipse $*

Finally make script executable

$ chmod +x ~/bin/eclipse

You can now execute that file to start up Eclipse.

<< Back to Setting up j2ee developer environment ...

</p>
<p>java.lang.NoClassDefFoundError:org/apache/commons/codec/DecoderException<br>
at org.apache.commons.httpclient.HttpMethodBase.&amp;lt;init(HttpMethodBase.java:216)<br>
at org.apache.commons.httpclient.methods.GetMethod.&amp;lt;init(GetMethod.java:88)</p>
<p>

Please tell me why am I getting this exception?

java.sql.SQLException: Io exception: Broken pipe
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:125)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:162)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:274)
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:319)
at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:344)
at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:148)
at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:32)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:545)
at java.sql.DriverManager.getConnection(DriverManager.java:525)
at java.sql.DriverManager.getConnection(DriverManager.java:171)
at com.ibatis.common.jdbc.SimpleDataSource.popConnection(SimpleDataSource.java:571)
at com.ibatis.common.jdbc.SimpleDataSource.getConnection(SimpleDataSource.java:213)
at com.ibatis.sqlmap.engine.transaction.jdbc.JdbcTransaction.init(JdbcTransaction.java:48)
at com.ibatis.sqlmap.engine.transaction.jdbc.JdbcTransaction.getConnection(JdbcTransaction.java:89)
at com.ibatis.sqlmap.engine.mapping.statement.GeneralStatement.executeQueryForList(GeneralStatement.java:123)
at com.ibatis.sqlmap.engine.impl.SqlMapExecutorDelegate.queryForList(SqlMapExecutorDelegate.java:610)
at com.ibatis.sqlmap.engine.impl.SqlMapExecutorDelegate.queryForList(SqlMapExecutorDelegate.java:584)
at com.ibatis.sqlmap.engine.impl.SqlMapSessionImpl.queryForList(SqlMapSessionImpl.java:101)
at com.ibatis.sqlmap.engine.impl.SqlMapClientImpl.queryForList(SqlMapClientImpl.java:78)

1. Set System environment variables
  a. JPDA_TRANSPORT=dt_socket
  b. JPDA_ADDRESS=8000 (Any other port you like)

2. Start tomcat using catalina.bat jpda start . Make sure that you have restarted the command prompt window after setting environment variables.
C:\tomcat\bin>catalina.bat jpda start

3. Debug program from the IDE and bind to 8000 (on JPDA_ADDRESS) port.