Are you using Wonder? I seem to recall that Anjo fixed a pretty huge
performance problem in removeObject a year or two ago ...
ms
On Jul 8, 2010, at 10:58 AM, Chuck Hill wrote:
> Hi Greg,
>
> Is the database content (not the schema) the same for both deployments?
> Could one have a very large number of back-pointing relationships that the
> other does not have? If so, I will suggest that you have a modelling issue.
> If not... puzzling.
>
> Chuck
>
>
> On Jul 8, 2010, at 6:46 AM, Greg Lappen wrote:
>
>> Hi all,
>>
>> I am running into a bizarre issue with our WebObjects Application. I have
>> searched the lists for quite a while, but could not find a case where
>> someone had the same problem.
>>
>> What is even stranger is that our application is deployed on two different
>> servers, both with WebObjects 5.4.3 and in one environment the issue occurs,
>> and not in the other.
>>
>> What I see is that calling editingContext.saveChanges() is returning
>> immediately in one case, and hanging for 20 seconds in the other case. It's
>> not really "hanging" - the CPU is pegged at over 100%, and taking thread
>> dumps during that 20 seconds shows something like this:
>>
>> "WorkerThread3" prio=5 tid=0x000000010296a800 nid=0x1519b2000 runnable
>> [0x00000001519af000]
>> java.lang.Thread.State: RUNNABLE
>> at java.lang.reflect.Array.newInstance(Array.java:52)
>> at
>> com.webobjects.foundation._NSCollectionPrimitives.copyArray(_NSCollectionPrimitives.java:123)
>> at com.webobjects.foundation.NSArray.objectsNoCopy(NSArray.java:356)
>> at
>> com.webobjects.foundation.NSMutableArray._removeObject(NSMutableArray.java:225)
>> at
>> com.webobjects.foundation.NSMutableArray.removeObject(NSMutableArray.java:247)
>> at
>> com.webobjects.foundation.NSMutableArray.removeObjects(NSMutableArray.java:399)
>> at
>> com.webobjects.foundation.NSMutableArray.removeObjectsInArray(NSMutableArray.java:285)
>> at
>> com.webobjects.foundation._NSArrayUtilities.arrayExcludingObjectsFromArray(_NSArrayUtilities.java:173)
>> at
>> com.webobjects.eoaccess.EODatabaseContext.recordChangesInEditingContext(EODatabaseContext.java:5943)
>> at
>> com.webobjects.eocontrol.EOObjectStoreCoordinator.saveChangesInEditingContext(EOObjectStoreCoordinator.java:373)
>> at
>> com.webobjects.eocontrol.EOEditingContext.saveChanges(EOEditingContext.java:3192)
>> at net.paperfree.lightbeam.model.LPFile.setFileData(LPFile.java:102)
>>
>> Seems like the EODatabaseContext is doing some housekeeping before executing
>> the SQL....here's the Java code in question:
>>
>> public class LPFile extends _LPFile {
>> ....
>> ....
>> public synchronized void setFileData(NSData fileData) throws IOException {
>> // Update forms by deleting existing ones, then adding new ones
>> for (int i=lpFileForms().count()-1; i>=0; i--) {
>> final LPFileForm lpFileForm = (LPFileForm)
>> lpFileForms().objectAtIndex(i);
>> this.removeFromLpFileForms(lpFileForm);
>> editingContext().deleteObject(lpFileForm);
>> }
>>
>> // Get new form list via SOAP call
>> Element docInfoElm = LPServer.threadLocal().exportDocumentInfo(this);
>>
>> List formElms = formsElm.getChildren("form");
>> for (int i = 0; i < formElms.size(); i++) {
>> Element formElm = (Element) formElms.get(i);
>> LPFileForm lpFileForm = new LPFileForm();
>>
>> // extract data from xml, put into lpFileForm
>>
>> // Setup relationships to lpForm and lpFile
>> lpFileForm.setLpForm(lpForm);
>> lpFileForm.setLpFormID(lpForm.id());
>> lpFileForm.setLpFile(this);
>> lpFileForm.setLpFileID(this.fileID());
>>
>> this.addToLpFileForms(lpFileForm);
>> editingContext().insertObject(lpFileForm);
>> }
>>
>> editingContext().saveChanges();
>> }
>> ....
>> ....
>> }
>>
>> Does the above code have anything obviously wrong with it? It's basically
>> clearing a one-to-many relationship, then re-populating it. I call
>> this.addToLpFileForms() because I want the relationship updated in memory as
>> well as in the database.
>>
>> Any insight would be hugely appreciated.
>>
>> Thanks,
>>
>> Greg
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>
> --
> Chuck Hill Senior Consultant / VP Development
>
> Practical WebObjects - for developers who want to increase their overall
> knowledge of WebObjects or who are trying to solve specific problems.
> http://www.global-village.net/products/practical_webobjects
>
>
>
>
>
>
>
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