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Bug 356707

Summary:	[Activities] Activity add/removes listener during notification which results in inconsistent behaviour
Product:	[Eclipse Project] Platform	Reporter:	bugs
Component:	UI	Assignee:	Platform UI Triaged <platform-ui-triaged>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	normal
Priority:	P3	CC:	remy.suen
Version:	3.6.2
Target Milestone:	---
Hardware:	PC
OS:	Windows Vista
Whiteboard:	stalebug

Description bugs

2011-09-05 03:02:09 EDT

Build Identifier: 20110218-0911

org.eclipse.ui.internal.activities.Activity:

fireActivityChanged() operates directly on the listener list and not on a copy of it. Therefore if a listener is removed during the activityChange() subsequent listener are skipped.

I would suggest to make a temporary copy of the activityListener List and use it in the notification loop.

Reproducible: Always

Steps to Reproduce:
1. Add two IActivityListener to the same Activity (IActivity.addActivityListener)
2. Let the first listener remove itself from the activity when called by calling IActivity.removeActivityListener
3. Change the activity on which the two listener where added. Result: The first listener removes itself from IActivity and the second listener is not called.

Comment 1 Lars Vogel

2019-11-14 03:24:03 EST

This bug hasn't had any activity in quite some time. Maybe the problem got resolved, was a duplicate of something else, or became less pressing for some reason - or maybe it's still relevant but just hasn't been looked at yet.

If you have further information on the current state of the bug, please add it. The information can be, for example, that the problem still occurs, that you still want the feature, that more information is needed, or that the bug is (for whatever reason) no longer relevant.

If the bug is still relevant, please remove the "stalebug" whiteboard tag.