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Bug 241367

Summary:	3.8s in classloading - ignore snapshot if time spend in ProxyClassLoader.loadXXX
Product:	ide	Reporter:	Exceptions Reporter <exceptions_reporter>
Component:	Exceptions Reporter	Assignee:	Tomas Hurka <thurka>
Status:	NEW ---
Severity:	normal	CC:	22bueno, akooberoi, andersondeana, aquaglia, bennyl, bladefidz, daniel_9328, dankauffman, dima14682, dzb3688, egeek, eripsait, federico.rocchegiani, gilbertoca, harvero, hi10IT, jomello_br, josmarl, jtulach, jyeary, KhArtNJava, kkidman, mcabrry, mdaltaf23, misterm, nalin1990, newworldpradeep, nleck, ostermann_bernd, ruz, rweaver, sachith.dickwella, Sam.MIT, scanti, seyfer, subaiesarah, szmitek, thilina01, tomasbabic, unai, vasiliy_pdk, WebSofter, zoren
Priority:	P3	Keywords:	PERFORMANCE
Version:	8.0
Hardware:	All
OS:	All
Issue Type:	DEFECT	Exception Reporter:	207258
Attachments:	nps snapshot

Description Exceptions Reporter 2014-02-04 09:16:30 UTC

This bug was originally marked as duplicate of bug 232939, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related.

Build: NetBeans IDE 8.0 Beta (Build 201401141042)
VM: OpenJDK 64-Bit Server VM, 24.45-b08, OpenJDK Runtime Environment, 1.7.0_51-b00
OS: Linux

User Comments:
GUEST: Updating composer dependencies in a PHP project and going through the options



Maximum slowness yet reported was 3831 ms, average is 3831

Comment 1 Exceptions Reporter 2014-02-04 09:16:32 UTC

Created attachment 144759 [details]
nps snapshot

Comment 2 Jaroslav Tulach 2014-02-05 07:32:30 UTC

I think there is a general consensus we won't do anything with slow classloading (due to overloaded disk). The 
http://statistics.netbeans.org/exceptions/exception.do?id=710400
report is an example of such case:

- more than 3s spend under ProxyClassLoader
- there is just one call to ProxyClassLoader

I know we do various detections to eliminate broken snapshots. Could we also add a "classloading check"? If at least 90% of time is spend in a single call to org.netbeans.*ClassLoader, consider the report broken and don't promote it to the server?

Comment 3 Tomas Hurka 2014-02-05 12:01:02 UTC

Such testing cannot be done in NetBeans itself. We can do it on the statistics.netbeans.org server, where we have proper infrastructure - it can be similar to Slow Windows I/O test.

Comment 4 Jaroslav Tulach 2014-02-14 11:23:23 UTC

*** Bug 237231 has been marked as a duplicate of this bug. ***