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Bug 225418 - Schedule source roots refresh to one thread only.
Summary: Schedule source roots refresh to one thread only.
Status: RESOLVED FIXED
Alias: None
Product: debugger
Classification: Unclassified
Component: Java (show other bugs)
Version: 7.3
Hardware: All All
: P3 normal (vote)
Assignee: Martin Entlicher
URL:
Keywords: PERFORMANCE
Depends on:
Blocks:
 
Reported: 2013-01-28 15:35 UTC by Martin Entlicher
Modified: 2013-08-30 15:59 UTC (History)
0 users

See Also:
Issue Type: DEFECT
Exception Reporter:

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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