This user guide is intended to help you when you receive a remote debug port Tomcat error code.
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START TOMCAT WITH JPDA will have managed remote debugging on port 8080.
This article shows you how to deal with debugging issues in scripts when they mostly only occur in the production environment (or other controller environment), butabout not at the development stand. Anyone who has been in this situation will tell you that trying to determine the cause of this kind of “problem” can end up becoming an exercise in taking images in the dark: at any time, the process will be more time consuming and inefficient.
Perhaps this is a nice situation I recently ran into when I needed help fixing some issues that were showing up in a production environment but might not be reproducible on a development machine.
How do I start Tomcat in remote debug mode?
Start Tomcat in remote debug mode. Run su to switch to the original user on Linux or macOS. Run ps -ef|grep tomcat to see if the tomcat server is running. If Tomcat is running, run the shutdown.sh file to shut it down. Run the catalina.sh jpda run command to start this Tomcat server in debug mode.
Fortunately, these issues should be reproduced in a test environment (which is as close to a full production environment as possible). But while the issues were reproducible in the quality environment, it was useful for confirming issues that still needed to be fixed, but it was especially useful for finding your own issues, finding the root cause, and finding incidents. Relying on log generation alone wasn’t enough… What if I could debug a test environment with the help of my husband and my machine?
This For a moment, I thought about remote debugging, and also the question of whether there is a program that would run an application on a specific remote JVM and, in doing so, could intercept its execution from any copy of the source code located in the local IDE. : basically similar to what a workstation would do.
And, of course, very appropriate. I checked what is needed; Probably there will be a setting and that’s it. It wasn’t a difficult sound. Thus, with the help of his colleague Thijs Schnitger, he was able to get it to work without too much trouble.
Therefore, this post describes an operational method for setting up the ultimate remote debugging capability of a JVM using a tool in the IDE. The following outline of the procedure, using IntelliJ IDEA as the IDE and a remote implementation for debugging, would be a web page application running on Tomcat. The simple steps below should apply to both the remote JVM application and the IDE, although the specific steps are subject to change, the general idea remains specific. The article also provides an effective overview of the technologies that make it possible remote debugging.
Tomcat Installation Guide
- start with remote debugging enabled and
- With our IDE, in our case IntelliJ IDEA, to be able to debug our remote Tomcat application.
Where is remote debug port Tomcat?
In Debug Configurations, double click “Remote Java Application”. In the Name field, enter a name of your choice. On the project panel, use the browse button to select the project and the project you want to debug separately. A hostname is nothing but the address of your host.
The main body can be done in several ways and is slightly different from the base frame. What operating system environment is your Tomcat instance running in. But whichever method is used, the real idea of the configuration remains the most important; That is, pass some test parameters to the JVM that can enable remote debugging.
The JVM startup arguments needed to enable remote debugging can be set using JPDA_OPTS, CATALINA_OPTS, and JAVA_OPTS, although running JAVA_OPTS is generally not recommended because the main reason is that the option specified by JAVA_OPTS is available to all JVMs. applications, but with CATALINA_OPTS certain situations are limited to Tomcat only.JPDA_OPTS
If You Are Using The JPDA_OPTS Option, You May Need To Have The Required Set Of Boot Arguments In A File Called Setenv.sh (or Setenv.bat On Windows). Create An If File Type That Is Not Already There Is. It Is Located In The CATALINA_HOME/bin Directory. And Add This To The Content:
These Settings Allow You To Enable Remote Debugging And Configure The Available Options: Specify This Particular Communication Protocol Between The Running Function And The Debugger (for Example, Transport=dt_socket ) And My Port That The Remote Debugger Actually Needs (for Example, Address = 1403). ). The Server=y Option Specifies That This JVM Can Remain Debugged, While Suspend=n Is Used To Train The JVM To Start Up Immediately Rather Than Waiting For A Debugger To Connect. If Set To Then “y”, The Application Will Be Stopped And Therefore Not Launched Until A Debugger Is Connected.
A Good Situation Where We Might Need To Suspend=y Comes After Debugging A Problem Preventing A Handler From Successfully Starting. Suspending=y Can Ensure That The JVM Stays Up So That The Remote Debugger Can Meet Before Trying To Start And Runtit Application.
Although It Is Sometimes Possible To Place Settings Directly In The Catalina.sh (or Catalina.bat) File, Site Is Always Preferred Over Other Configurations In The Setenv.* File. They Will Be Automatically Specified By Tomcat.
Note That You May Come Across Another Recommendation That You Can Use To Enable Remote Debugging:
-Xdebug -Xrunjdwp:transport=dt_socket,server=y,address=1043, Suspend=n
How do you debug Catalina?
Start Tomcat Passout from the command line.Set a breakpoint anywhere in your code (preferably in a non-running project) by left-clicking to the left of the code section.From the Run menu, select Debug.
The Difference Between This And The Recommended Option Is That The -Xdebug And -Xrunjdwp Options Are All Old Methods Of Enabling Remote Debugging; It Is Valid For JVMs Up To JAVA 5.0 (JAVA 1.5.0) Because The -agentlib:jdwp Option Is Valid For 5 Java.0 Albeit Higher… And With This Config Space, You Can Run Tomcat-provided Command Line Arguments:
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