How to start debug mode from command prompt for apache tomcat server?

Question

I want to start debug mode for my application. But I need to start the debug mode from command prompt. Is it possible ? And will the procedure vary between tomcat 5.5 to tomcat 6.?

possible duplicate of [Start tomcat 6 in debug mode?](http://stackoverflow.com/questions/5458212/start-tomcat-6-in-debug-mode) — Makoto, May 24 '13 at 05:47

score 135 · Answer 1 · edited Jun 25 '19 at 19:46

135

On windows

$ catalina.bat jpda start

On Linux/Unix

$ catalina.sh jpda start

More info ----> https://cwiki.apache.org/confluence/display/TOMCAT/Developing

edited Jun 25 '19 at 19:46

Brian J. Miller

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answered May 22 '13 at 10:24

Adil Shaikh

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Thanks, this helped me to setup the debug option in `startup.sh`. Editing the last line in `tomcat/bin/startup.sh` to `exec "$PRGDIR"/"$EXECUTABLE" jpda start "$@"`. I always forget to start in debug mode and I can save a 5minute restart. – TomasZ. Dec 22 '17 at 08:01

score 60 · Answer 2 · answered Oct 04 '13 at 10:35

60

For windows first set variables:

set JPDA_ADDRESS=8000
set JPDA_TRANSPORT=dt_socket

to start server in debug mode:

%TOMCAT_HOME%/bin/catalina.bat jpda start

For unix first export variables:

export JPDA_ADDRESS=8000
export JPDA_TRANSPORT=dt_socket

and to start server in debug mode:

%TOMCAT_HOME%/bin/catalina.sh jpda start

answered Oct 04 '13 at 10:35

krzysiek.ste

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um yes, although 8000 and dt_socket are mentioned as defaults in catalina.bat, you actually have to set them as in the above post :/ – hello_earth Jun 24 '18 at 15:49
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to the point answer and It worked for me +1. saved my day – Joginder Malik Jun 24 '20 at 08:34

score 29 · Answer 3 · edited Jul 17 '17 at 16:51

From your IDE, create a remote debug configuration, configure it for the default JPDA Tomcat port which is port 8000.

From the command line:

Linux:

cd apache-tomcat/bin
export JPDA_SUSPEND=y
./catalina.sh jpda run

Windows:

cd apache-tomcat\bin
set JPDA_SUSPEND=y
catalina.bat jpda run

Execute the remote debug configuration from your IDE, and Tomcat will start running and you are now able to set breakpoints in the IDE.

Note:

The JPDA_SUSPEND=y line is optional, it is useful if you want that Apache Tomcat doesn't start its execution until step 3 is completed, useful if you want to troubleshoot application initialization issues.

score 16 · Answer 4 · edited Oct 01 '20 at 22:12

16

A short answer is to add the following options when the JVM is started.

JAVA_OPTS=" $JAVA_OPTS -Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8080"

edited Oct 01 '20 at 22:12

Jahan Zinedine

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answered Apr 05 '16 at 07:48

Marcel Zebrowski

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When using JAVA_OPTS -Xdebug you need not start catalina with jpda. Otherwise you may end up with this `ERROR: Cannot load this JVM TI agent twice, check your java command line for duplicate jdwp options.` – lnarasimhan Nov 17 '17 at 21:40

Konstantin Yovkov · Answer 5 · 2013-05-22T10:36:04.510

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First, Navigate to the TOMCAT-HOME/bin directory.

Then, Execute the following in the command-line:

catalina.bat jpda start

If the Tomcat server is running under Linux, just invoke the catalina.sh program

catalina.sh jpda start

It's the same for Tomcat 5.5 and Tomcat 6

edited May 22 '13 at 10:36

answered May 22 '13 at 10:22

Konstantin Yovkov

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Can you tell me the equivalent of Tomcat 7.0? – RAS May 19 '14 at 13:45

score 4 · Answer 6 · answered Mar 08 '18 at 05:31

These instructions worked for me on apache-tomcat-8.5.20 on mac os 10.13.3 using jdk1.8.0_152:

$ cd /path/to/apache-tomcat-8.5.20/bin
$ export JPDA_ADDRESS="localhost:12321"
$ ./catalina.sh jpda run

Now connect to port 12321 from IntelliJ/Eclipse and enjoy remote debugging.

Tharindu Ketipearachchi · Answer 7 · 2018-08-06T07:26:24.960

3

There are two ways to run tomcat in debug mode

Using jdpa run
Using JAVA_OPTS

First setup the environment. Then start the server using following commands.

export JPDA_ADDRESS=8000

export JPDA_TRANSPORT=dt_socket

%TOMCAT_HOME%/bin/catalina.sh jpda start

sudo catalina.sh jpda start

refer this article for more information this is clearly define it

edited Aug 06 '18 at 07:26

answered May 21 '15 at 09:26

Tharindu Ketipearachchi

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score 1 · Answer 8 · answered Oct 23 '19 at 17:04

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If you're wanting to do this via powershell on windows this worked for me

$env:JPDA_SUSPEND="y"

$env:JPDA_TRANSPORT="dt_socket"

/path/to/tomcat/bin/catalina.bat jpda start

answered Oct 23 '19 at 17:04

MarkyMarksFunkyBunch

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score 0 · Answer 9 · answered Apr 15 '14 at 06:26

Inside catalina.bat set the port on which you wish to start the debugger

if not "%JPDA_ADDRESS%" == "" goto gotJpdaAddress
set JPDA_ADDRESS=9001

Then you can simply start the debugger with

catalina.bat jpda

Now from Eclipse or IDEA select remote debugging and start start debugging by connecting to port 9001.

Eljah · Answer 10 · 2023-05-22T12:16:12.093

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If you want to keep this always when your service is running, you should edit your bin/startup.sh. There add 'jpda' parameter right here

exec "$PRGDIR"/"$EXECUTABLE" jpda  start "$@"

instead of original

exec "$PRGDIR"/"$EXECUTABLE" start "$@"

edited May 22 '23 at 12:16

answered May 22 '23 at 09:34

Eljah

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How to start debug mode from command prompt for apache tomcat server?

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