Multithread debugging

Hi Ilya,

I'm afraid I don't understand what behavior would you expect from the ide here? It stops on break points and, as far as I understood, break points are hit often at your application

Denis

Examle: web page sends 5 requests that all get through my class. So I catch them all on my breakpoint.  Then I switch off the breakpoint, so new threads can't be caught.
For example debugger is in thread #1. Then when I click "next step", debugger instead of staying in current thread, moves to another thread(#2,3,...).

Sometimes it happens even without clicking   "next step": Information about variables of thread #1 doesn't end loading, but debugger jumps to another thread.

I've found the same question asked 10 years ago, but it also wasn't answered. http://devnet.jetbrains.com/message/556661#556661

AFAIK debugger api doesn't provide a notion of step and its implemented via setting temporary break point at the target instruction and then remove it when control flow reaches it.

Regarding your situation - as soon as your breakpoint is hit, you can mark current thread and define a condition for all other break points like 'Thread.currentThread() == myMark_DebugLabel'

And yes, debugging concurrent processing is a complicated task.

Denis

AFAIK debugger api doesn't provide a notion of step and its implemented via setting temporary break point at the target instruction and then remove it when control flow reaches it.

Sometimes it happens even without clicking   "next step": Information about variables of thread #1 doesn't end loading, but debugger jumps to another thread.

In this situation I can't even determine which of 5 threads is mine. (Server stands in another city, so info loads slowly)
What to do in this situation?

illabefact wrote:

AFAIK debugger api doesn't provide a notion of step and its implemented via setting temporary break point at the target instruction and then remove it when control flow reaches it.

It does not explain such behavior.
I place brreakpoint at line 100. Then I turn it off. When I click "next step" temporary breakpoint is placed at line 101(roughly) and current thread is unpaused. So I should get current thread caught at line 101, because the only active breakpoint is temporary and only current thread gonna hit it. But instead of it I get another thread at line 100.

Sometimes it happens even without clicking   "next step": Information about variables of thread #1 doesn't end loading, but debugger jumps to another thread.

In this situation I can't even determine which of 5 threads is mine. (Server stands in another city, so info loads slowly)
What to do in this situation?

Will ask our engineer who is responsible for debugging to have a look here.

Denis

Any update here?

Hi Mm989 Please check the following tutorial https://www.jetbrains.com/help/idea/detect-concurrency-issues.html . If this is not what you need describe your case in a bit more detail.

Thank you!