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Bug 257140

Summary:	Freeze in ParametersPanel
Product:	java	Reporter:	Jesse Glick <jglick>
Component:	Refactoring	Assignee:	Ralph Ruijs <ralphbenjamin>
Status:	NEW ---
Severity:	normal	CC:	carnepicante, jhon_numpaque, malam, maxqnei, nant82, sdei.sdd
Priority:	P3	Keywords:	PERFORMANCE
Version:	8.2
Hardware:	All
OS:	All
Issue Type:	DEFECT	Exception Reporter:	221674
Attachments:	nps snapshot dump of active threads

Description Jesse Glick 2015-12-14 15:35:02 UTC

This issue was reported manually by jglick.
It already has 1 duplicates 


Build: NetBeans IDE Dev (Build 20151104-5022c03c8164)
VM: Java HotSpot(TM) 64-Bit Server VM, 25.66-b17, Java(TM) SE Runtime Environment, 1.8.0_66-b17
OS: Linux

User Comments:
jglick: Find Usages was running in one tab (looking up Maven repo usages I suppose). I pressed Alt-Shift-U on another type and the IDE froze. (For longer than 11s. More like a couple of minutes.)



Maximum slowness yet reported was 11445 ms, average is 11445

Comment 1 Jesse Glick 2015-12-14 15:35:03 UTC

Created attachment 157783 [details]
nps snapshot

Comment 2 Jesse Glick 2015-12-14 15:37:34 UTC

Created attachment 157784 [details]
dump of active threads

The slowness detector seems to have misclassified this completely. Attached a thread dump taken while the IDE was frozen for a couple minutes; AFAICT there was no disk activity at the time, or maybe only sporadic. It seems that ParametersPanel is doing some kind of complex calculation, and the event thread is blocked waiting for it.