On Jun 27, 2007, at 1:47 PM, fan yang wrote:
I have tried Jess Version 7.1a1 to load the same aforementioned
facts file, I still got the following error without any luck.
Ernest, you said that 7.1 parser would detect duplicate symbols and
share them, how can I know this new function work? Need I give some
commands to Jess and ask Jess parser detect duplicate and share them?
If 7.1 parser will not be a solution for my problem, is there
another way to fix or alleviate my problem? thank you.
Well, since there was a relevant new feature, that's the first thing
I mentioned; but there is a lot of old-school advice I can give, too.
The most important one is understanding and minimizing partial-match
count. For example, in the FAQ there is a question dedicated to this:
http://herzberg.ca.sandia.gov/jess/FAQ.shtml#Q12 . Have you taken
this into consideration yet? If not, that's where you go next.
Fan
Jess> Exception in thread "main" java.lang.OutOfMemoryError : Java
heap space
at jess.factory.FactoryImpl.newToken(FactoryImpl.java:27)
at jess.Node2.tokenMatchesLeft(Node2.java:328)
at jess.Node2.tokenMatchesRight(Node2.java:344)
at jess.Node2.doRunTestsVaryLeft (Node2.java:381)
at jess.Node2.runTestsVaryLeft(Node2.java:354)
at jess.Node2.callNodeRight(Node2.java:234)
at jess.Node1.passAlong(Node1.java:49)
at jess.Node1TECT.callNodeRight (Node1TECT.java:40)
at jess.NodeRoot.passAlong(NodeRoot.java:34)
at jess.NodeRoot.callNodeRight(NodeRoot.java:14)
at jess.FactList.processToken(FactList.java:31)
at jess.FactList._assert (FactList.java:204)
at jess.FactList.assertFact(FactList.java:178)
at jess.Rete.assertFact(Rete.java:495)
at jess.Jesp.loadFacts(Jesp.java:351)
at jess.LoadFacts.call(IOFunctions.java :314)
at jess.FunctionHolder.call(FunctionHolder.java:35)
at jess.Funcall.execute(Funcall.java:325)
at jess.Jesp.parseAndExecuteFuncall(Jesp.java:2190)
at jess.Jesp.parseExpression (Jesp.java:453)
at jess.Jesp.promptAndParseOneExpression(Jesp.java:303)
at jess.Main.execute(Main.java:177)
at jess.Main.main(Main.java:35)
On 6/27/07, Ernest Friedman-Hill <[EMAIL PROTECTED]> wrote: It
looks like your facts include a mostly symbols, with a lot of
duplication. This is good news, because the parser in Jess 7.1
(there's an alpha version available on the web site) will detect
duplicate symbols and share them, which in your case could save a
*lot* of memory. Try it out and see what happens!
On Jun 27, 2007, at 9:34 AM, fan yang wrote:
> Hi,
>
> I'm trying to use Jess to detect source code defects. The tool
> first parse source code and generate facts which represent design
> information such as classes, functions, attributes, inheritances
> and invocations etc., then apply Jess rule to detect flaws. The
> tools works on small size of source code. but It got OutOfMemory
> error when it dealt with bigger projects such as JHotDraw
> (SourceForge project).
>
> I have read Jess manual, mailing list and Jess in Action book, I
> didn't get solution. Would you please tell me how to apply Jess on
> large facts set. What is the best practice or procedure to make
> Jess application use less memory. Or Is there a way to know how
> many memory the different facts occupy?
>
> Here shows a little bit more details of my test case, can you
> point me right way to avoid out of memory problem?
>
> JHotDraw project's facts file is about 4M bytes. My computer has 2G
> RAM. I set maximum java heap size to 1G through JVM's -Xmx1024M, I
> got OutOfMemory exception when I just tried to load facts using the
> following code:
>
> (clear)
> (batch "C:/output/project.clp")
> (reset)
> (load-facts "C:/output/project.facts")
>
>
> Partial facts file:
>
> (package
> (packageName org.jhotdraw.util)
> (parentName nil))
>
> (classifier
> (unqualifiedName StorableInput)
> (package org.jhotdraw.util)
> (classifierName org.jhotdraw.util.StorableInput)
> (type class)(isAbstract concrete)
> (isLeaf leaf)(isRoot root))
>
> (visibilityInPackage
> (unqualifiedName StorableInput)
> (package org.jhotdraw.util)
> (classifier org.jhotdraw.util.StorableInput)
> (visibility public))
>
> (access
> (operation org.jhotdraw.util.StorableInput.retrieve)
> (attribute org.jhotdraw.util.StorableInput.retrieve.ref)
> (accessType nil))
>
> (operation
> (unqualifiedName retrieve)
> (classifier org.jhotdraw.util.StorableInput)
> (operationName org.jhotdraw.util.StorableInput.retrieve)
> (scope instance)(visibility private)
> (polymorphism nil)(abstractOrConcrete concrete)
> (constOrNonConst nonconst)(numberParameters 1))
>
> (parameter
> (unqualifiedName nil)
> (operationName org.jhotdraw.util.StorableInput.retrieve)
> (parameterName nil)(order nil)
> (direction return)
> (parameterType org.jhotdraw.util.Storable))
>
>
> Thank you.
>
> Fan
---------------------------------------------------------
Ernest Friedman-Hill
Advanced Software Research Phone: (925) 294-2154
Sandia National Labs FAX: (925) 294-2234
PO Box 969, MS 9012 [EMAIL PROTECTED]
Livermore, CA 94550 http://www.jessrules.com
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Ernest Friedman-Hill
Advanced Software Research Phone: (925) 294-2154
Sandia National Labs FAX: (925) 294-2234
PO Box 969, MS 9012 [EMAIL PROTECTED]
Livermore, CA 94550 http://www.jessrules.com
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