Re: [wtp-dev] "java indexing" thread causes high cpu load after build

[NICHOLAS SANDONATO <nsandona@xxxxxxxxxx>]

Hi Patric,

This indexing of JSPs is so that Java
references in them can be used for search and refactoring.  Right
now, there is no way to disable this indexing as it potentially removes
a lot of functionality.  The preference to include JSP matches in
Java searches pertains only to the reporting in the view and not to the
actual indexing of these files.  We would likely be able to enhance
the indexer to ignore particular files based on some rules like if it's
derived.

From:	Patric Rufflar <patric@xxxxxxxxxxx>
To:	wtp-dev@xxxxxxxxxxx
Date:	03/11/2011 12:43 PM
Subject:	[wtp-dev] "java indexing" thread causes high cpu load after build
Sent by:	wtp-dev-bounces@xxxxxxxxxxx

---

Hello,

I am experiencing the reproducible problem that
the java indexing thread causes high cpu load for several minutes
after a build took place.

My build procedure includes a special builder which (more or less)  
copies all jsps to another directory in my project (and marks these  
copies as derived).

All Web/WTP validators are configured as suspended in the preference dialog.

Please have a look at the following thread dump which has been taken  
after a build finished and while the cpu usage can be seen:
(although I cannot see any active background tasks in the progress monitor)

org.eclipse.jst.jsp.core.internal.parser.internal.JSPTokenizer.primGetNextToken()
(line:  
2120)
org.eclipse.jst.jsp.core.internal.parser.internal.JSPTokenizer.getNextToken()
 
(line: 1643)
org.eclipse.wst.xml.core.internal.parser.XMLSourceParser.getNextRegion()
 
(line: 189)
org.eclipse.jst.jsp.core.internal.parser.JSPSourceParser.parseNodes()  
(line: 237)
org.eclipse.wst.xml.core.internal.parser.XMLSourceParser.getDocumentRegions()
 
(line: 173)
org.eclipse.wst.sse.core.internal.text.StructuredDocumentReParser._core_reparse_text(int,
 
int)
org.eclipse.wst.sse.core.internal.text.StructuredDocumentReParser.core_reparse(int,
int, org.eclipse.wst.sse.core.internal.text.CoreNodeList, boolean) (line:
 
710)
org.eclipse.jst.jsp.core.internal.parser.JSPReParser.reparse(org.eclipse.wst.sse.core.internal.provisional.text.IStructuredDocumentRegion,
org.eclipse.wst.sse.core.internal.provisional.text.IStructuredDocumentRegion)
(line:  
143)
org.eclipse.wst.sse.core.internal.text.StructuredDocumentReParser.reparse()
 
(line: 1291)
org.eclipse.wst.sse.core.internal.text.BasicStructuredDocument.updateModel(java.lang.Object,
int, int, java.lang.String) (line:  
2709)
org.eclipse.wst.sse.core.internal.text.BasicStructuredDocument.internalReplaceText(java.lang.Object,
int, int, java.lang.String, long, boolean) (line:  
1923)
org.eclipse.wst.sse.core.internal.text.BasicStructuredDocument.replaceText(java.lang.Object,
int, int, java.lang.String, long, boolean) (line:  
2419)
org.eclipse.wst.sse.core.internal.text.BasicStructuredDocument.setText(java.lang.Object,
java.lang.String) (line:  
2606)
org.eclipse.wst.sse.core.internal.text.JobSafeStructuredDocument.setText(java.lang.Object,
java.lang.String) (line:  
188)
org.eclipse.wst.sse.core.internal.text.BasicStructuredDocument.set(java.lang.String)
(line:  
2481)
org.eclipse.jst.jsp.core.internal.java.XMLJSPRegionHelper.parse(java.lang.String)
(line:  
159)
org.eclipse.jst.jsp.core.internal.java.JSPTranslator.handleIncludeFile(java.lang.String)
(line:  
2310)
org.eclipse.jst.jsp.core.internal.java.JSPTranslator.translateDirective(java.util.Iterator)
(line:  
2033)
org.eclipse.jst.jsp.core.internal.java.JSPTranslator.translateJSPNode(org.eclipse.wst.sse.core.internal.provisional.text.ITextRegion,
java.util.Iterator, java.lang.String, int) (line:  
1766)
org.eclipse.jst.jsp.core.internal.java.JSPTranslator.translateRegionContainer(org.eclipse.wst.sse.core.internal.provisional.text.ITextRegionCollection,
int) (line:  
1349)
org.eclipse.jst.jsp.core.internal.java.JSPTranslator.translate() (line:
1127)
org.eclipse.jst.jsp.core.internal.java.JSPTranslationAdapter.getJSPTranslation()
(line:  
153)
org.eclipse.jst.jsp.core.internal.java.search.JSPSearchDocument.getJSPTranslation()
(line:  
120)
org.eclipse.jst.jsp.core.internal.java.search.JSPSearchDocument.getCharContents()
(line:  
77)
org.eclipse.jst.jsp.core.internal.java.search.JavaSearchDocumentDelegate.getCharContents()
org.eclipse.jdt.internal.core.search.indexing.SourceIndexer.indexDocument()
 
(line: 60)
org.eclipse.jdt.internal.core.search.JavaSearchParticipant.indexDocument(org.eclipse.jdt.core.search.SearchDocument,
org.eclipse.core.runtime.IPath) (line:  
72)
org.eclipse.jst.jsp.core.internal.java.search.JSPSearchParticipant.indexDocument(org.eclipse.jdt.core.search.SearchDocument,
org.eclipse.core.runtime.IPath) (line:  
72)
org.eclipse.jdt.internal.core.search.indexing.IndexManager.indexDocument(org.eclipse.jdt.core.search.SearchDocument,
org.eclipse.jdt.core.search.SearchParticipant, org.eclipse.jdt.internal.core.index.Index,
org.eclipse.core.runtime.IPath) (line:  
453)
org.eclipse.jdt.internal.core.search.indexing.IndexManager$1.execute(org.eclipse.core.runtime.IProgressMonitor)
(line:  
853)
org.eclipse.jdt.internal.core.search.processing.JobManager.run() (line:
404)
java.lang.Thread.run() (line: 662)


"Include JSP matches in Java searches" is disabled.
I am using the most recent Eclipse 3.6.2 / WTP 3.2.3

My questions:
- What does this java indexing do in my case?
- Is this is bug? Or did I miss an important configuration option?
- Is there a workaround? Can I disable this indexing or at least for  
all derived files?

Thank you and best regards,
Patric


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