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Using Mylyn 3.2.1 A colleague noticed considerable UI stalls (about 2 minutes) in the following situation: 1. Task activated 2. Noticed that the wrong task was activate 3. Change active task 4. Insert / delete white space (no-op change) in a file to trigger the correct task-specific changeset comment 5. Save the no-op change Now Eclipse was blocked for about 2 minutes. We were able capture a series of jstack stack trace to see which thread was active during the stall. Please find attached a ZIP file with 120 jstack traces. The naming pattern of every jstack is "jstack.PID.HHMMSS.nnnnnnn", where HH=hour, MM=minute, SS==second, nnnnnn=nanoseconds. So you can order the files by name to get the order in time. The snapshots were done every second or less. I suggest to grep for "FocusedViewerManager" to see occurances in 92 of the 120 files: bc. jstack.26228.133010.905401446: at org.eclipse.mylyn.internal.context.ui.FocusedViewerManager.updateExpansionState(FocusedViewerManager.java:351) jstack.26228.133010.905401446: at org.eclipse.mylyn.internal.context.ui.FocusedViewerManager.access$1(FocusedViewerManager.java:313) jstack.26228.133010.905401446: at org.eclipse.mylyn.internal.context.ui.FocusedViewerManager$FocusedViewerDelayedRefreshJob.doRefresh(FocusedViewerManager.java:99) jstack.26228.133011.733045607: at org.eclipse.mylyn.internal.context.ui.FocusedViewerManager.updateExpansionState(FocusedViewerManager.java:351) jstack.26228.133011.733045607: at org.eclipse.mylyn.internal.context.ui.FocusedViewerManager.access$1(FocusedViewerManager.java:313) jstack.26228.133011.733045607: at org.eclipse.mylyn.internal.context.ui.FocusedViewerManager$FocusedViewerDelayedRefreshJob.doRefresh(FocusedViewerManager.java:99) jstack.26228.133012.610889547: at org.eclipse.mylyn.internal.context.ui.FocusedViewerManager.updateExpansionState(FocusedViewerManager.java:351) Only the main thread seems to change. You may also use vimdiff with up to 4 files to see a series of differences nicely. -- Configuration Details -- Product: Eclipse 1.2.0.20090618-0904 (org.eclipse.epp.package.jee.product) Installed Features: org.eclipse.jdt 3.5.0.v20090527-2000-7r88FEeFJePyvYeA33DjZ_c1
Created attachment 144605 [details] ZIP file with 120 jstack traces done every second during the 2 minute stall This ZIP file contains 120 jstack trace done every second during the UI stall. 92 of these files contain the FocusedViewerManager line and only the main thread changes AFAIK.
Shawn, could that be a duplicate of bug 267143?
(In reply to comment #2) > Shawn, could that be a duplicate of bug 267143? Hmmm, this looks similiar (though I am not Shanwn of course :-) ) My colleague experiences this roughly once a day so it is rather annoying.
From looking at the stack traces, it does look like bug 267143. Jörg, there was a regression that we fixed in 3.2.1 which may be causing this as well. What version of Mylyn is your colleague using? If they are using 3.2.0, could you get them to update and see if they still experience the same problem?
(In reply to comment #4) > From looking at the stack traces, it does look like bug 267143. Jörg, there was > a regression that we fixed in 3.2.1 which may be causing this as well. What > version of Mylyn is your colleague using? If they are using 3.2.0, could you > get them to update and see if they still experience the same problem? Sorry, but we all are using Eclipse 3.2.1 due to our shared installation. So this issue has not been fixed with 3.2.1
Thanks for letting us know that this isn't fixed in the latest. This still does look like a case of bug 267143. Joerg, do you know how many elements are in your colleagues context that is having this problem? Also, when this problem happens, do he/she have the context tab of the task editor open or any other views open that are focused?
(In reply to comment #6) > Thanks for letting us know that this isn't fixed in the latest. This still does > look like a case of bug 267143. Joerg, do you know how many elements are in > your colleagues context that is having this problem? No idea, as he is on holiday now. > Also, when this problem > happens, do he/she have the context tab of the task editor open or any other > views open that are focused? He was in the Team Perspective, noticed that he had selected the wrong task, switched the task and made a no-op change (insert/remove space) to a file to trigger the new commit comment from the task. During the stall, all files in the Team Perspective were selected (marked).
(In reply to comment #5) > (In reply to comment #4) > > From looking at the stack traces, it does look like bug 267143. Jörg, there > was > > a regression that we fixed in 3.2.1 which may be causing this as well. What > > version of Mylyn is your colleague using? If they are using 3.2.0, could you > > get them to update and see if they still experience the same problem? > > Sorry, but we all are using Eclipse 3.2.1 due to our shared installation. So > this issue has not been fixed with 3.2.1 Sorry, Shawn. I have been mistaken: My colleague actually used an older version of the shared installtion with Mylyn 3.2.0 in it. So it is not a regression, but could be well be the mentioned bug. He updated his installation now and we will report a new bug if it happens again. *** This bug has been marked as a duplicate of bug 267143 ***
