Remote debugging on Tomcat with Eclipse

Question

I'm trying to initiate a remote debugging session on my PC with Eclipse & Tomcat. I managed to run tomcat (not through eclipse) with the following params:

set JPDA_TRANSPORT=dt_socket
set JPDA_ADDRESS=5050
cataline jpda start

The server starts ok, this is the outcome:

Using CATALINA_BASE:   "C:\Java\Tomcat"
Using CATALINA_HOME:   "C:\Java\Tomcat"
Using CATALINA_TMPDIR: "C:\Java\Tomcat\temp"
Using JRE_HOME:        "C:\Java\jdk1.6.0_27"
Using CLASSPATH:       ...
Listening for transport dt_socket at address: 5050
...
...
INFO: Server startup in 12502 ms

Now, I opened eclipse, and loaded the relevant project.

I set a new debugging configuration using Remote Java Application with localhost and the right port. however when I run it, I get this error message:

Failed to connect to remote VM. Connection refused.
Connection refused: connect

Can't really understand where is the problem. this is all local inside the PC, so there shouldn't be any firewalls involved, can someone think of something ?

`cataline jpda start` looks strange. Typically it is called `catalina`. Are you sure you are running good script? — AlexR, Nov 07 '11 at 17:20
try run just `catalina jpda start` and connect to port 8000. Without your own scripts, variables etc. I hope it will work. If yes, continue discovering why your port 5050 does not work. — AlexR, Nov 07 '11 at 17:23
Haven't debugged Tomcat for a while, but maybe take a look at [this](http://www.eclipsezone.com/eclipse/forums/t53459.html). Don't remember if specifying address and transport is sufficient. As you see there are some additional options such as `server=y,suspend=n`. Also, I think that you could enable Tomcat debugging through *admin console* (which is much safer than modifying startup script). — jFrenetic, Nov 07 '11 at 17:24
is your debug profile set to Socket Attach or Socket Listen? — mcfinnigan, Nov 07 '11 at 17:24
check if this helps: http://stackoverflow.com/questions/3835612/remote-debugging-tomcat-with-eclipse — stivlo, Nov 07 '11 at 17:34

score 4 · Accepted Answer · answered Nov 08 '11 at 09:48

Found the solution. apparently the connection was made, but Eclipse & Tomcat don'tt show any notification or status regarding it. Then, when you initiate the connection again, you get the error because you're already connected.

I think that a small notice, either from Eclipse, or from Tomcat would be nice.

score 0 · Answer 2 · answered Sep 11 '14 at 07:05

0

There could be problems when there are code mismatches between eclipse and tomcat. So when it matches the error will disappear

answered Sep 11 '14 at 07:05

Sumukh

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score 0 · Answer 3 · answered Jul 16 '18 at 06:34

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You can configure it in remote java application section in debug configuration. For more details you can refer this link

answered Jul 16 '18 at 06:34

Balkrushna Patil

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score 0 · Answer 4 · answered Nov 07 '11 at 18:08

0

Try adding the following debug options directly to the JVM startup by directly modifying the catalina startup script

-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=5050

answered Nov 07 '11 at 18:08

Drona

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Remote debugging on Tomcat with Eclipse

4 Answers4