Problem with python debugger in PyCharm 2024.3
Hello,
The Python debugger has stopped working on my recent PyCharm update. The debugger hits the breakpoint but fails to load threads/variables and hangs during “Step over” or “Step in” operations.
Software info:
PyCharm 2024.3 (Professional Edition)Build #PY-243.21565.199, built on November 13, 2024Licensed to Pooja Nagendra BabuSubscription is active until May 31, 2025For educational use only.Runtime version: 21.0.5+8-b631.16 x86_64 (JCEF 122.1.9)VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o.Toolkit: sun.lwawt.macosx.LWCToolkitmacOS 14.6.1GC: G1 Young Generation, G1 Concurrent GC, G1 Old GenerationMemory: 2048MCores: 8Metal Rendering is ONRegistry: ide.balloon.shadow.size=0 debugger.new.tool.window.layout=true ide.intellij.laf.enable.animation=true ide.experimental.ui=true i18n.locale=Non-Bundled Plugins: org.antlr.intellij.plugin (1.24) com.jetbrains.space (243.21565.122) com.intellij.ml.llm (243.21565.247) org.jetbrains.plugins.gitlab (243.21565.204) org.jetbrains.plugins.github (243.21565.204-ultimate)
Soon after the breakpoint is hit:
After clicking on Step Over:
Any pointer on getting this to work is appreciated!
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Does disabling
python.debug.use.single.portin Help | Find Action | Registry helps?We had similar reports.
hi Miguel, i had a problem that connection stayed in a endless loop. Disabling single.port helped to get connected to debugger. Thank you for the hint.
Working with PyCharm 2024.3 Build #PY-243.21565.199, built on November 13, 2024
Hi Miguel,
Disabling
python.debug.use.single.portdidn't help.I came across this issue which is similar: https://youtrack.jetbrains.com/issue/PY-37426/Debugger-step-into-step-over-not-working-anymore. According to this, disabling
python.debug.low.impact.monitoring.apidid the trick.I think it is better this be documented somewhere.
Thank you,
Pooja
Afraid we are also running into the issue, both `python.debug.use.single.port` and `python.debug.low.impact.monitoring.api` didn't work.
I am facing a problem with Debugger not being able to disconnect when I stop it (red rectangle button).
I tried to implement the suggestion but I don't have the Help | Find Action | Registry menu.
I am using the following version:
PyCharm 2024.3.1.1 (Professional Edition)
Build #PY-243.22562.220, built on December 18, 2024
i had the same issue and disabling “python.debug.use.single.port” worked
I encountered this problem after updating PyCharm to version 2024.3. At that time, I rolled back to 2024.2 and used that version for a long time. A few days ago, I decided to try updating to the latest version — 2025.1.3 — hoping the debugger issue had been fixed. Unfortunately, I experienced the same behavior: I can run my project using Debug, but PyCharm does not stop at breakpoints.
I'm using Docker and Docker Compose for my local development environment. I tried using SSH, Docker, and Dockerfile-based interpreters. I even tried switching from my base image (
python:alpine) to apython:slimDocker image — still no luck.As a last resort, I removed the
.ideafolder and set everything up from scratch. That finally worked. I actually backed up the original.ideafolder and, after the clean setup, copied back only what I needed — such as data sources and folder marker configurations.I faced the same issue .Disabling both worked for me
Same problem with Pycharm 2026.1.1. Fed up to pay for this!
Perrot We have debugpy available as the debugger on 2026.1.1 - please double-check using it. In case the issue persists, your case definetely differs from the one from this post, please create a new bug report on YouTrack and provide the IDE logs from Help | Collect the Logs and Diagnostic Data