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Bug 225418

Summary:	Schedule source roots refresh to one thread only.
Product:	debugger	Reporter:	Martin Entlicher <mentlicher>
Component:	Java	Assignee:	Martin Entlicher <mentlicher>
Status:	RESOLVED FIXED
Severity:	normal	Keywords:	PERFORMANCE
Priority:	P3
Version:	7.3
Hardware:	All
OS:	All
Issue Type:	DEFECT	Exception Reporter:

Description Martin Entlicher 2013-01-28 15:35:54 UTC

As can be seen from http://bugzilla-attachments-225311.netbeans.org/bugzilla/attachment.cgi?id=130677, there can be multiple threads doing the same expensive work - refreshing source roots and creating the new class path.

This can be optimized to schedule the work to just one thread, that would be postponed as new requests for refresh come.

"JPDA Debugger" daemon prio=2 tid=0x0dbee800 nid=0x1048 runnable [0x077bf000]
   java.lang.Thread.State: RUNNABLE
	at java.io.WinNTFileSystem.canonicalize0(Native Method)
	at java.io.Win32FileSystem.canonicalize(Win32FileSystem.java:414)
	at java.io.File.getCanonicalPath(File.java:589)
	at java.io.File.getCanonicalFile(File.java:614)
	at org.openide.filesystems.FileUtil.normalizeFileOnWindows(FileUtil.java:1707)
	at org.openide.filesystems.FileUtil.normalizeFileImpl(FileUtil.java:1598)
	at org.openide.filesystems.FileUtil.normalizeFileCached(FileUtil.java:1579)
	at org.openide.filesystems.FileUtil.normalizeFile(FileUtil.java:1561)
	at org.openide.filesystems.FileUtil.toFile(FileUtil.java:826)
	at org.netbeans.core.startup.layers.ArchiveURLMapper.getFileObjects(ArchiveURLMapper.java:134)
	at org.openide.filesystems.URLMapper.findFileObject(URLMapper.java:213)
	at org.netbeans.modules.debugger.jpda.projects.SourcePathProviderImpl.createClassPath(SourcePathProviderImpl.java:1364)
	at org.netbeans.modules.debugger.jpda.projects.SourcePathProviderImpl.access$400(SourcePathProviderImpl.java:113)
	at org.netbeans.modules.debugger.jpda.projects.SourcePathProviderImpl$PathRegistryListener.rootsChanged(SourcePathProviderImpl.java:1578)
	- locked <0x320aaee0> (a org.netbeans.modules.debugger.jpda.projects.SourcePathProviderImpl)
	at org.netbeans.modules.debugger.jpda.projects.SourcePathProviderImpl$PathRegistryListener.access$200(SourcePathProviderImpl.java:1467)
	at org.netbeans.modules.debugger.jpda.projects.SourcePathProviderImpl$PathRegistryListener$1.run(SourcePathProviderImpl.java:1480)
	at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1454)
	at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2048)

Comment 1 Martin Entlicher 2013-08-30 15:59:17 UTC

Fixed by changeset:   263201:d42f37e087fa
http://hg.netbeans.org/core-main/rev/d42f37e087fa