X-CGP-ClamAV-Result: CLEAN X-VirusScanner: Niversoft's CGPClamav Helper v1.22.2a (ClamAV engine v0.102.2) X-Junk-Score: 0 [] X-KAS-Score: 0 [] From: "OCsite" Received: from smtp-beta-1.zoner.com ([217.198.120.66] verified) by post.selbstdenker.com (CommuniGate Pro SMTP 6.3.3) with ESMTPS id 26007114 for webobjects-dev@wocommunity.org; Fri, 11 Jun 2021 13:38:05 +0200 Received-SPF: none receiver=post.selbstdenker.com; client-ip=217.198.120.66; envelope-from=ocs@ocs.cz Received: from smtp.zoner.com (smtp.zoner.com [217.198.120.6]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp-beta-1.zoner.com (Postfix) with ESMTPS id 6F1B1180A1E2 for ; Fri, 11 Jun 2021 13:37:44 +0200 (CEST) Received: from macbook-pro.ocsluj (unknown [77.240.103.197]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) (Authenticated sender: ocs@ocs.cz) by smtp.zoner.com (Postfix) with ESMTPSA id 218AC300007D for ; Fri, 11 Jun 2021 13:37:44 +0200 (CEST) Content-Type: multipart/alternative; boundary="Apple-Mail=_C038828C-5100-408A-8386-7CC892B228BE" Mime-Version: 1.0 (Mac OS X Mail 13.4 \(3608.120.23.2.6\)) Subject: Cannot determine primary key for entity Message-Id: <59EE1E16-2D96-48F6-A516-643A2A1FF437@ocs.cz> Date: Fri, 11 Jun 2021 13:37:43 +0200 To: webobjects-dev@wocommunity.org X-Mailer: Apple Mail (2.3608.120.23.2.6) --Apple-Mail=_C038828C-5100-408A-8386-7CC892B228BE Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 Hi there, just bumped into another weird EOF case. A pretty plain fetch caused a = =E2=80=9CCannot determine primary key for entity=E2=80=9D exception. The = row contains a number of columns whose values makes sense, some null, = some non-null, with one exception =E2=80=94 the primary key, modelled as = an attribute uid, is indeed a null, thus the exception makes a perfect = sense. How can this happen? =3D=3D=3D IllegalArgumentException: Cannot determine primary key for entity = DBRecord from row: {... uid =3D = ; ... } at = com.webobjects.eoaccess.EODatabaseChannel._fetchObject(EODatabaseChannel.j= ava:348) ... skipped 2 stack elements at = com.webobjects.eocontrol.EOObjectStoreCoordinator.objectsWithFetchSpecific= ation(EOObjectStoreCoordinator.java:488) at = com.webobjects.eocontrol.EOEditingContext.objectsWithFetchSpecification(EO= EditingContext.java:4069) at = er.extensions.eof.ERXEC.objectsWithFetchSpecification(ERXEC.java:1215) ... skipped 1 stack elements at = com.webobjects.eocontrol.EOObjectStoreCoordinator.objectsForSourceGlobalID= (EOObjectStoreCoordinator.java:634) at = com.webobjects.eocontrol.EOEditingContext.objectsForSourceGlobalID(EOEditi= ngContext.java:3923) at er.extensions.eof.ERXEC.objectsForSourceGlobalID(ERXEC.java:1178) ... skipped 1 stack elements at = com.webobjects.eoaccess.EOAccessArrayFaultHandler.completeInitializationOf= Object(EOAccessArrayFaultHandler.java:77) at = com.webobjects.eocontrol._EOCheapCopyMutableArray.willRead(_EOCheapCopyMut= ableArray.java:45) at = com.webobjects.eocontrol._EOCheapCopyMutableArray.count(_EOCheapCopyMutabl= eArray.java:103) at com.webobjects.foundation.NSArray.isEmpty(NSArray.java:1888) ... =3D=3D=3D Just in case it happens to be important (I believe it is not), the = problem happens at row ... =3Deolist.representedObject.records().isEmpty()?...:... where records just returns storedValueForKey('records'), self-evidently = a fault, which fires to fetch the rows. Searching the Web, all I've found is this = (linked from = here = ), which does not really help :) Truth is, some = background threads do run at the moment; they are comparatively plain = though and I can't see why they should cause the problem for the R/R = thread. All they do is to 1. get their own OSC from the pool, making sure they never get the same = OSC normal sessions have 2. create a new ERXEC in this OSC 3. get a local instance of an object in the EC =3D=3D=3D this is the code of the background thread; a number of those = runs: def store for (def pool=3DERXObjectStoreCoordinatorPool._pool();;) { store=3Dpool.nextObjectStore if (store!=3D_sessionosc) break // there's one OSC for all = sessions, stored in _sessionosc } return = eo.localInstanceIn(ERXEC.newEditingContext(store)).numberOfMasterRowsWitho= utOwner() =3D=3D=3D and the method simply fetches: =3D=3D=3D int numberOfMasterRowsWithoutOwner { def = mymasterrow=3DEOQualifier.qualifierWithQualifierFormat("importObject.dataB= lock =3D %@ AND recordOwner =3D NULL",[this] as NSA) return = ERXEOControlUtilities.objectCountWithQualifier(this.editingContext, = 'DBRecord', mymasterrow) } =3D=3D=3D Most time it works properly. Occasionally =E2=80=94 rather rarely =E2=80=94= the problem above happens. Can you see what am I doing wrong? Thanks a lot, OC --Apple-Mail=_C038828C-5100-408A-8386-7CC892B228BE Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=utf-8
Hi there,

just bumped into another weird EOF case. A pretty plain fetch = caused a =E2=80=9CCannot determine primary key for entity=E2=80=9D = exception. The row contains a number of columns whose values makes = sense, some null, some non-null, with one exception =E2=80=94 the = primary key, modelled as an attribute uid, is indeed a null, thus the = exception makes a perfect sense.

How can this = happen?

=3D=3D=3D
IllegalArgumentException: = Cannot determine primary key for entity DBRecord from row: {... uid =3D = <com.webobjects.foundation.NSKeyValueCoding$Null>; ... = }
  at = com.webobjects.eoaccess.EODatabaseChannel._fetchObject(EODatabaseChannel.j= ava:348)
    =  ... skipped 2 stack elements
  at = com.webobjects.eocontrol.EOObjectStoreCoordinator.objectsWithFetchSpecific= ation(EOObjectStoreCoordinator.java:488)
  at = com.webobjects.eocontrol.EOEditingContext.objectsWithFetchSpecification(EO= EditingContext.java:4069)
  at = er.extensions.eof.ERXEC.objectsWithFetchSpecification(ERXEC.java:1215)
     ... skipped = 1 stack elements
  at = com.webobjects.eocontrol.EOObjectStoreCoordinator.objectsForSourceGlobalID= (EOObjectStoreCoordinator.java:634)
  at = com.webobjects.eocontrol.EOEditingContext.objectsForSourceGlobalID(EOEditi= ngContext.java:3923)
  at = er.extensions.eof.ERXEC.objectsForSourceGlobalID(ERXEC.java:1178)
     ... skipped = 1 stack elements
  at = com.webobjects.eoaccess.EOAccessArrayFaultHandler.completeInitializationOf= Object(EOAccessArrayFaultHandler.java:77)
  at = com.webobjects.eocontrol._EOCheapCopyMutableArray.willRead(_EOCheapCopyMut= ableArray.java:45)
  at = com.webobjects.eocontrol._EOCheapCopyMutableArray.count(_EOCheapCopyMutabl= eArray.java:103)
  at = com.webobjects.foundation.NSArray.isEmpty(NSArray.java:1888)=
...
=3D=3D=3D

Just in case it happens to be important (I = believe it is not), the problem happens at row

  =       ... = =3Deolist.representedObject.records().isEmpty()?...:...

where records = just returns storedValueForKey('records'), = self-evidently a fault, which fires to fetch the rows.

Searching = the Web, all I've found is this (linked from here), which does not really = help :) Truth is, some background threads do run at = the moment; they are comparatively plain though and I can't see why they = should cause the problem for the R/R thread. All they do is to

1. get their own OSC = from the pool, making sure they never get = the same OSC normal sessions have
2. = create a new ERXEC in this OSC
3. get a local = instance of an object in the EC

=3D=3D=3D this is the code of the = background thread; a number of those runs:
        def store
      =   for (def = pool=3DERXObjectStoreCoordinatorPool._pool();;) {
      =       store=3Dpool.nextObjectStore
          =   if (store!=3D_sessionosc) = break // there's one = OSC for all sessions, stored in _sessionosc
        }
      =   return eo.localInstanceIn(ERXEC.newEditingContext(s= tore)).numberOfMasterRowsWithoutOwner()
=3D=3D=3D

and the method simply fetches:

=3D=3D=3D
    int numberOfMasterRowsWithoutOwner = {
      =   def = mymasterrow=3DEOQualifier.qualifierWithQualifierFormat("importObject.dataBlock =3D = %@ AND recordOwner =3D NULL",[this] as NSA)
        = return ERXEOControlUtilities.objectCountWithQualifier(this.editingContext, = 'DBRecord', mymasterrow)
  =   }
=3D=3D=3D

Most time it works = properly. Occasionally =E2=80=94 rather rarely =E2=80=94 the problem = above happens. Can you see what am I doing wrong?
Thanks a lot,
OC


= --Apple-Mail=_C038828C-5100-408A-8386-7CC892B228BE--