IntelliJ IDEA stucks at "collecting data" while debug

Question

I'm using IntelliJ IDEA to debug remote tomcat application.

It works perfect before.

However, for recent times, it always get stuck at "collecting data", though the data is very small.

I have searched on this site, and tried:

Intelliji idea is very slow in debug mode and it is running perfectly in normal mode

IntelliJ freezes for about 30 seconds before debugging

Still does not work

What's the Suspend Policy? Does switching it to [Thread](https://i.imgur.com/c5vbeA2.png) help? See [this document](https://intellij-support.jetbrains.com/hc/articles/206544799). If it doesn't help, file a bug at https://youtrack.jetbrains.com/issues/IDEA and attach the following: [idea.log](https://intellij-support.jetbrains.com/hc/articles/207241085), [thread dumps](https://intellij-support.jetbrains.com/hc/articles/206544899) of IntelliJ IDEA and Tomcat processes using `jstack`, `.idea` directory contents from the project. Specify IntelliJ IDEA, Java and Tomcat versions you are using. — CrazyCoder, Apr 30 '19 at 03:31
[Debugger logs](https://intellij-support.jetbrains.com/hc/articles/207241125) may be also helpful. — CrazyCoder, Apr 30 '19 at 03:31
@CrazyCoder Not yet. I will file a bug and attach the log files. — xingbin, Apr 30 '19 at 07:05
@CrazyCoder After closing the threads view, it became faster. — xingbin, May 05 '19 at 12:58
I had the same and here was my solution https://stackoverflow.com/a/63447369/3554624 — panser, Aug 17 '20 at 08:40

xingbin · Accepted Answer · 2020-09-17T15:12:10.390

10

I find this happens only when I open both Thread View and Variable View, like this

So I closed the Thread View, and it became much faster:

edited Sep 17 '20 at 15:12

answered May 05 '19 at 12:57

xingbin

27,410
9
53
103

3

I cant believe this actually solves my debugging issue. – abiieez May 15 '20 at 13:07
3

I was hoping for it but it's not enough – fireb86 Sep 17 '20 at 14:45
1

On intellij IDEA 2022.1 this doesn't solve the issue. – Ariel Mirra May 16 '22 at 19:33

score 3 · Answer 2 · answered Oct 25 '22 at 14:25

3

A workaround for if the variable x is stuck at "Collecting data...", evaluating its methods like x.toString() still worked for me to view its contents.

answered Oct 25 '22 at 14:25

WASDi

161
2
3

score 0 · Answer 3 · answered Feb 09 '23 at 20:18

In my IntelliJ IDEA 2022.2 the issue touched only List-like collections (thus all objects containing them as fields).
What helped me is disabling Enabling alternative view for Collection classes option in Settings > Debugger > Data Views > Java:
Now it shows collection size and expandable items instead of Collecting data...:

IntelliJ IDEA stucks at "collecting data" while debug

3 Answers3

Linked