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Created attachment 129398 [details] Thread dump I have observed this multiple times but was not able to find a pattern. Some time after running simple java projects, perhaps sometimes accidentally running the same program twice (which could be because of my confusion after the CPU is already at 100%), the IDE becomes very slow. Not as slow as not to respond, therefore it is probably some background thread taking all the CPU. In situations like this, I closed NetBeans normally. But the netbeans.exe process still consumed 100% and did not die, although the GUI was no longer showing so I killed it. This time, I could self-profile the IDE and start VisualVM and take a thread dump. After about 10 minutes, CPU is back to normal. - No processes running according to IDE status bar - no background scanning reported etc. - 100% CPU - 500 I/Os per second - No log entries I have never seen anything like this before 7.3 Is there anything else I should do when I see this next time?
Created attachment 129399 [details] self sampler from temp directory
Created attachment 129400 [details] Logs in zip file
It looks like org.netbeans.modules.maven.queries.RepositoryForBinaryQueryImpl$SrcResult$3.fileDataCreated() posts a lot of runnables to single-treaded request processor "Maven Repository SFBQ result change". Assigning to maven for further evaluation.
https://hg.netbeans.org/core-main/rev/5b9171245aca only one task running per result (however if there are 1800 results, not much we can do, 1800 is fairly realistic as we probably have one per maven dependency) also when reacting to file ownership changes, only react to changes related to the current result's GAV. I cannot think of more improvements there.
Integrated into 'main-golden', will be available in build *201212210001* on http://bits.netbeans.org/dev/nightly/ (upload may still be in progress) Changeset: http://hg.netbeans.org/main-golden/rev/5b9171245aca User: Milos Kleint <mkleint@netbeans.org> Log: #223865 only one RP task per result and only react to MFOQI changes when related to the current result's gav