The way to configure conditional breakpoints may be different in different IDE versions. For example, to do this with IntelliJ IDEA, go to the Debug menu and click.
You can confirm that 'Thread 1' was executed and didn't get suspended through the following steps:ġ.In the console, you can verify through the logs that 'Thread 1' ran and exited.Ģ.In the Threads pane, you can check that there is no 'Thread 1' Remote Debugging with an IDE You can remote debug Grails by running the. Using debugger, we can stop the execution of program at a certain point, inspect variables, step into function and do many things.
#INTELLIJ IDEA DEBUGGER HOW TO#
Note Unlike Eclipse IDE, there is always a ‘server view’ to configure the add server, IntelliJ do things differently, you need to add an artifact (war file) first, then only the server view will be displayed at the bottom. So now I will explain how to debug tests in IntelliJ IDEA IDE for a maven project in simple steps. When the app pauses, only 'Thread 2' is suspended. Debugger makes application debugging much easier. This article shows you how to run or debug a web application on Tomcat server, using IntelliJ IDEA. This condition ensures that the debugger would pause the current thread only if that thread's name is 'Thread 2':
Then we add the condition as shown in the screenshot below. After adding a breakpoint, right-click on it, check 'Suspend' and select 'Thread'. To set a breakpoint in IntelliJ IDEA you can left-click on the left column of your code. We can use conditional breakpoint feature. This includes 'Thread 1' and 'Thread 2' for our app. But we will run into a problem - all the threads that encounter the breakpoint will be suspended. This suggests that I need to add a breakpoint on the first line of FactorialCalculatingThread's run() method (line 39). You can double click on each thread to observe their call stacks.Īssume that I am troubleshooting a bug in this program and I need to pause execution only for 'Thread 2' as soon as it starts running. When the app pauses at that breakpoint, we should see at least three threads - 'main', 'Thread 1' and 'Thread 2' in this pane (check screenshot below).
#INTELLIJ IDEA DEBUGGER CODE#
Referring to the code above, I have added a breakpoint at thread1.join()(on line 18). Thread pane shows all the threads that are currently active. If you want to check call stack of other threads, you can select them from the drop down.
In the image below, the breakpoint is in the main() method and the Frame is showing us the call stack for the main thread. It focuses on the thread which is currently paused because of the breakpoint and shows the call stack of that thread. The Debug tool window has Frame pane which consists of a drop down. 2019.2.2 (CE)) tools that I often use while debugging a multithreaded app. Similarly, we call thread2.join() Use of Thread.join() method ensures that sum (on line 25) is not calculated until both the threads return, that is, addition is performed only after we get the factorials of 100. Then in the main() method, we call thread1.join() so that the main thread won't execute further until 'Thread 1' returns. All rights reserved.Here is what is happening in the above code: We initialize, name, and start two threads - 'Thread 1' (to calculate 100!) and 'Thread 2' (to calculate 100000!). 18:04:33,656 INFO - j. - BUILDER_PROCESS : SLF4J: See for further details. Analyze the program state After the debugger session has started, the program runs normally until a breakpoint is hit. Click the Run button near the main method. Enter arguments in the Program arguments field. 18:04:33,656 INFO - j. - BUILDER_PROCESS : SLF4J: Defaulting to no-operation (NOP) logger implementation Click the Run icon in the gutter, then select Modify Run Configuration. 18:04:33,656 INFO - j. - BUILDER_PROCESS : SLF4J: Failed to load class "". Classpath: /Applications/IntelliJ IDEA.app/Contents/lib/jps-launcher.jar:/Applications/IntelliJ IDEA.app/Contents/jdk/Contents/Home/lib/tools.jar:/Applications/IntelliJ IDEA.app/Contents/lib/optimizedFileManager.jar
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