Critical Regression in Katalon Studio 11.0.1 – IDE Freeze & Memory Leak During Execution Profile Switch

[arvind.choudhary]

Product Information

• Product: Katalon Studio Enterprise

• Version: 11.0.1

• OS: Windows 64-bit

• Project Type: Web UI Automation

• TestOps: Enabled

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Problem Statement (Critical)

After upgrading to Katalon Studio 11.0.1, the IDE consistently becomes completely unresponsive when switching the Execution Profile from default to any other profile.

This is a blocking issue that prevents further usage of the IDE.

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Reproducibility

Reproduces 100% of the time
Does not require test execution
Triggered specifically by Execution Profile change

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Steps to Reproduce

1. Launch Katalon Studio 11.0.1

2. Open an existing automation project

3. Attempt to change Execution Profile (e.g., default → QA / UAT)

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Actual Behavior

• IDE immediately goes into “Not Responding”

• UI never recovers

• JVM memory usage grows continuously (~1.4 GB and increasing)

• Memory is not released, indicating a potential heap leak or GC deadlock

• CPU usage remains low (not a busy loop)

• Process must be force-killed via Task Manager

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Expected Behavior

• Profile switch should complete normally

• IDE should remain responsive

• Memory usage should stabilize or be reclaimed by GC

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Regression Confirmation

This issue:

• Does not occur in earlier Katalon versions on the same machine

• Started only after upgrading to version 11.0.1

• Rolling back to an older version restores normal behavior

This clearly indicates a regression introduced in 11.0.1.

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Additional Diagnostic Observation

Another team member working on the same project, started using Katalon Studio 11.0.1, have not faced this issue on a different machine/environment (USA).
They are able to switch profiles and execute tests successfully.

This suggests:

• Environment‑dependent triggering

• But still a product-level defect, as:

  • The same machine worked on previous versions

  • Failure is deterministic post-upgrade

  • The issue is isolated to a specific IDE operation

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Impact

• Execution profiles cannot be changed

• Environment-based testing is blocked

• IDE becomes unusable

• This directly affects project deliverables

Severity: Critical / Productivity Blocker

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Suspected Root Cause (for Engineering Review)

Based on observed behavior, this may be related to:

• Execution Profile reloading logic

• GlobalVariable re-initialization

• Groovy script cache rebuild

• TestOps background sync hooks

• Plugins or listeners not being disposed

• Heap objects remaining strongly referenced after profile switch

Workaround which is working for time being is to disable the testOps and then again enable the connection, but this cannot be a solution. Katalon team must provide solution

[nghi.phan]

I have passed this to our product team, we will send more updates as soon as we can.

Bella

[arvind.choudhary]

Sure Thanks Bella

[kazurayam]

@arvind.choudhary

Steps to Reproduce

…
3. Attempt to change Execution Profile (e.g., default → QA / UAT)

I do not see what operation you meant by “Attempt to change Exectuion Profile”.

Is it this?

Or this?

Or this?

[arvind.choudhary]

No, I am getting the screen freeze when I try to execute the test, and to execute whenever I select the required profile, then it is getting freezed out.
I will post screenshots I tried couple of times but still getting the same freezed screen. and even I waited for long time, but that screen keep on hanging.

[arvind.choudhary]

It is working now, I just closed and cleaned up the project. I reinstalled and cleaned up the project.