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From Sven Hohlfeld ...@sven-hohlfeld.de>
Subject Problems with document update followed by attachment creation
Date Tue, 17 Aug 2010 22:53:10 GMT
Hello,

I am using jcouchdb in a groovy project. I stumbled into serious problems when I
update a document and afterwards create some attachements for this document.

I always get a "java.net.SocketException" (sometimes broken pipe, sometimes connection reset).

This is the relevant groovy code:

			document.suggestedTags = suggestedTagsWithFrequence
			database.updateDocument(document)
			
			//refresh
			final Map document4ImgExtraction = database.getDocument(Map.class, docId)
			log.debug 'Beginning image extraction...'
			List extractedImages = this.imageExtraction(file)
			this.addThumbsToDocument(database, document4ImgExtraction, extractedImages)



which calls this method of course:


	protected void addThumbsToDocument(final Database couchdb,  final Map currentDocument, final
List extractedImageFiles) {
		String revision = currentDocument._rev
		extractedImageFiles.each {final File pngFile ->
			revision = couchdb.createAttachment(currentDocument._id, revision, pngFile.name, 'image/png',
pngFile.readBytes()))
			log.info "Prepared attachement for document: ${currentDocument._id} with filename: ${pngFile.name}
and revision: ${revision}"
		}
		
	}

and produces the following stacktrace (part):

Caused by: org.jcouchdb.exception.CouchDBException: java.net.SocketException: Connection reset
        at org.jcouchdb.util.ExceptionWrapper.wrap(ExceptionWrapper.java:44)
        at org.jcouchdb.db.ServerImpl.executePut(ServerImpl.java:144)
        at org.jcouchdb.db.ServerImpl.put(ServerImpl.java:303)
        at org.jcouchdb.db.Database.createAttachment(Database.java:963)
        at sun.reflect.GeneratedMethodAccessor138.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
       at java.lang.reflect.Method.invoke(Method.java:616)
        at org.codehaus.groovy.runtime.callsite.PojoMetaMethodSite$PojoCachedMethodSiteNoUnwrapNoCoerce.invoke(Poj
oMetaMethodSite.java:229)
        at org.codehaus.groovy.runtime.callsite.PojoMetaMethodSite.call(PojoMetaMethodSite.java:52)
        
//this is the line where couchdb.createAttachment(currentDocument._id...) is called
at com.doctape.processing.InboundUploadsService$_addThumbsToDocument_closure1.doCall(InboundUploadsService
.groovy:86)


        at sun.reflect.GeneratedMethodAccessor152.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:616)
        at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:88)
        at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:233)        at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1058)
        at groovy.lang.ExpandoMetaClass.invokeMethod(ExpandoMetaClass.java:1070)        at
groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:886)
        at groovy.lang.Closure.call(Closure.java:276)
        at groovy.lang.Closure.call(Closure.java:289)
        at org.codehaus.groovy.runtime.DefaultGroovyMethods.each(DefaultGroovyMethods.java:1184)
        at org.codehaus.groovy.runtime.DefaultGroovyMethods.each(DefaultGroovyMethods.java:1160)
        at org.codehaus.groovy.runtime.dgm$111.invoke(Unknown Source)
        at org.codehaus.groovy.runtime.callsite.PojoMetaMethodSite$PojoMetaMethodSiteNoUnwrapNoCoerce.invoke(PojoM
etaMethodSite.java:270)
        at org.codehaus.groovy.runtime.callsite.PojoMetaMethodSite.call(PojoMetaMethodSite.java:52)
        at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:125)

//This is the 'looping' each closure (extractedImageFiles.each{...
        at com.doctape.processing.InboundUploadsService.addThumbsToDocument(InboundUploadsService.groovy:84)


The problem occurs only in the combination of the document update followed by the attachment
creation. If I comment one thing out (document update or createAttachment calls)
it works.

Any ideas are highly appreciated :-)

Cheers, Sven
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