[GemStone-Smalltalk] Class connector conundrum
David Shaffer
shaffer at shaffer-consulting.com
Tue Jun 4 11:14:17 PDT 2024
Yes, that definitely helped. The problem was simple, I guess, but probably reflects a misunderstanding I have about migration. The issue was that I had several objects that referred to various classes (classes stored in their I-vars). I had recently migrated instances of those classes but apparently the references to the class objects themselves were not migrated. So, what I had in the repository was several class objects that had the same names as classes in my Symbol List but were not, themselves, classes in that symbol list nor were they in the class history of the classes in that symbol list since I had migrated all instances of this class to a new version and removed the old class from the Symbol List. The migration was performed by the UI tools (from gemstone browser -> select class -> browse versions -> remove hit OK twice and select the new version to migrate to).
Thanks for your help Richard!
Best,
David
> On Jun 3, 2024, at 4:05 PM, Richard Sargent <richard.sargent at gemtalksystems.com> wrote:
>
> Good! That makes it much easier to diagnose.
>
>
> On Mon, Jun 3, 2024 at 12:49 PM David Shaffer <shaffer at shaffer-consulting.com <mailto:shaffer at shaffer-consulting.com>> wrote:
>> False lead…sorry, just made a mistake in my debugging code.
>>
>> I rebuilt my dev image from ground up and now I’m able to reproduce the problem there as well.
>>
>> -D
>>
>>> On Jun 3, 2024, at 3:20 PM, Richard Sargent <richard.sargent at gemtalksystems.com <mailto:richard.sargent at gemtalksystems.com>> wrote:
>>>
>>> On Mon, Jun 3, 2024 at 12:15 PM David Shaffer <shaffer at shaffer-consulting.com <mailto:shaffer at shaffer-consulting.com>> wrote:
>>>> Ah, a clue…when I turn on removeInvalidConnectors, the connectors for this hierarchy are removed. How are connectors validated?
>>>
>>> As far as I see, the only place that happens is in GbsSession>>handleFailedConnectors:messages:. And, in your first report, I thought you said there were no failed connections.
>>> Perhaps add an error in this method so that the stack dump shows what the problems were.
>>> (An error doesn't matter, because it won't be much later before you try to replicate instances of the classes that failed to connect.)
>>>
>>>
>>>>
>>>> -D
>>>>
>>>>> On Jun 3, 2024, at 2:59 PM, David Shaffer <shaffer at shaffer-consulting.com <mailto:shaffer at shaffer-consulting.com>> wrote:
>>>>>
>>>>> Yes, the session is logged in and I’m sending a message to a collection of objects that are being faulted in from the DB. At this point in the code, many gemstone objects have been replicated to VW.
>>>>>
>>>>> -D
>>>>>
>>>>>> On Jun 3, 2024, at 2:57 PM, Richard Sargent <richard.sargent at gemtalksystems.com <mailto:richard.sargent at gemtalksystems.com>> wrote:
>>>>>>
>>>>>> And, to be clear, the point at which the unmapped class error occurs is after the completion of session login? Right?
>>>>>>
>>>>>> On Mon, Jun 3, 2024 at 11:33 AM David Shaffer <shaffer at shaffer-consulting.com <mailto:shaffer at shaffer-consulting.com>> wrote:
>>>>>>> Thanks for looking at this Richard. The class and all of its super- and sub-classes are connected:
>>>>>>>
>>>>>>> GbsClassConnector stName: #'Trader.EdgeTriggersOrderSignal' gsName: 'Trader_EdgeTriggersOrderSignal' dictionary: #TraderClasses is connected = true
>>>>>>> GbsClassConnector stName: #'Trader.AbstractTradeOnMarketSignal' gsName: 'Trader_AbstractTradeOnMarketSignal' dictionary: #TraderClasses is connected = true
>>>>>>> GbsClassConnector stName: #'Trader.LevelTriggersOrderSignal' gsName: 'Trader_LevelTriggersOrderSignal' dictionary: #TraderClasses is connected = true
>>>>>>> GbsClassConnector stName: #'Trader.AbstractTradingSignal' gsName: 'Trader_AbstractTradingSignal' dictionary: #TraderClasses is connected = true
>>>>>>>
>>>>>>> I tried catching the exception and then re-printing the status of the connectors. Still connected ;)
>>>>>>>
>>>>>>> -D
>>>>>>>
>>>>>>>> On Jun 3, 2024, at 12:02 PM, Richard Sargent <richard.sargent at gemtalksystems.com <mailto:richard.sargent at gemtalksystems.com>> wrote:
>>>>>>>>
>>>>>>>> On Sun, Jun 2, 2024 at 9:28 PM David Shaffer via GemStone-Smalltalk <gemstone-smalltalk at lists.gemtalksystems.com <mailto:gemstone-smalltalk at lists.gemtalksystems.com>> wrote:
>>>>>>>>> Hey folks…killed a whole day on this one and I’m stuck. I’m running an application on VW9.4/GBS8.7.1/GS3.6.5 where I have some (a lot of) class connectors in my session parameters. Among them:
>>>>>>>>>
>>>>>>>>> GbsClassConnector stName: #'Trader.LevelTriggersOrderSignal' gsName: 'Trader_LevelTriggersOrderSignal' dictionary: #TraderClasses
>>>>>>>>>
>>>>>>>>> I am able to access objects in my repository replicated into GBS on my desktop image. When I package it up and run it headless in my docker container I get:
>>>>>>>>>
>>>>>>>>> Unhandled exception: No client class Trader_LevelTriggersOrderSignal, class generation is disabled.
>>>>>>>>>
>>>>>>>>> when loading objects in my repository of the aforementioned type. I’ve verified that the Smalltalk class Trader.LevelTriggersOrderSignal is in the deployed image. I’ve also checked that there is only one class with that name in my repo (the class history has 1 element in it) and that the class of the object in the repository that is causing the problem has the same OOP as the class in TraderClasses.
>>>>>>>>>
>>>>>>>>> Full stack trace is pasted below. I’ve tried poking around quite a bit including adding some tracing to GbsSession>>connectClassConnectorsTypeNoneIn:addFailedConnectorsTo:addMessagesTo: to double-check that the connector is indeed being connected and everything looks OK. I’ve tried all kinds of things but I’m pretty much stuck on this one. Sorry for the lack of details…not expecting anyone to be able to sort this out from my vague description…just hoping for some debugging suggestions. GBS is complicated.
>>>>>>>>
>>>>>>>> Let's start with verifying that the connector really was established. Add some diagnostic code to iterate through your connectors after logging in and find that particular one. Then report the value of each instance variable. Also, report the result of sending the GbsConnector>>isConnectedInSession: message for the connector.
>>>>>>>>
>>>>>>>> The fact that it is executing GbxUnmappedClassReplicator>>findOrGenerateClientClass strongly suggests the class is NOT connected (yet). But, if that were the case, I would have expected to see the same problem in an image with a GUI.
>>>>>>>>
>>>>>>>> Are any of the connectors defining a class hierarchy? In particular, is the missing one a subclass of another that's also in the connectors list?
>>>>>>>> If so, the problem could be the fact that the connectors in the Session Parameters is a Set. The order is effectively random so an attempt to connect a subclass before its superclass, might be problematic. I would have expected an error if that had happened, but your investigation showed everything connected fine.
>>>>>>>>
>>>>>>>>
>>>>>>>>>
>>>>>>>>> BTW: In order to get my application to run under GBS8.7.1 I had to patch GbsRuntime parcel to include GbsSessionManager>>connectorList (which is in GbsTools but is sent from GbsSession>>mapCrucialClasses) since I don’t load GbsTools in my deployed image. I think this is a GBS packaging bug but I could be wrong.
>>>>>>>>
>>>>>>>> Definitely an error. It's been like that since at least 2014! I will fix it for GBS 8.8. I have created bug #51015 for it.
>>>>>>>>
>>>>>>>>>
>>>>>>>>> Best,
>>>>>>>>>
>>>>>>>>> David
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> Unhandled exception: No client class Trader_LevelTriggersOrderSignal, class generation is disabled.
>>>>>>>>>
>>>>>>>>> ----------------------------------------------------------------------
>>>>>>>>> GbxMessageDispatcher>>basicRaise:message:
>>>>>>>>> Receiver:
>>>>>>>>> a GbxMessageDispatcher
>>>>>>>>> Instance Variables:
>>>>>>>>> handler = a CstMessageHandlerVw
>>>>>>>>> Arguments:
>>>>>>>>> errorSignal = GemStone.Gbs.GbsClassGenerationError
>>>>>>>>> errorString = 'No client class Trader_LevelT...lass generation is disabled.'
>>>>>>>>> Context PC = 4
>>>>>>>>>
>>>>>>>>> ----------------------------------------------------------------------
>>>>>>>>> GbxMessageDispatcher>>raise:message:withArguments:
>>>>>>>>> Receiver:
>>>>>>>>> a GbxMessageDispatcher
>>>>>>>>> Instance Variables:
>>>>>>>>> handler = a CstMessageHandlerVw
>>>>>>>>> Arguments:
>>>>>>>>> errorSignal = GemStone.Gbs.GbsClassGenerationError
>>>>>>>>> aString = 'No client class %1, class generation is disabled.'
>>>>>>>>> args = an Array[1]
>>>>>>>>> Temporaries:
>>>>>>>>> string = 'No client class Trader_LevelT...lass generation is disabled.'
>>>>>>>>> Context PC = 12
>>>>>>>>>
>>>>>>>>> ----------------------------------------------------------------------
>>>>>>>>> GbxMessageDispatcher>>raise:message:with:
>>>>>>>>> Receiver:
>>>>>>>>> a GbxMessageDispatcher
>>>>>>>>> Instance Variables:
>>>>>>>>> handler = a CstMessageHandlerVw
>>>>>>>>> Arguments:
>>>>>>>>> errorSignal = GemStone.Gbs.GbsClassGenerationError
>>>>>>>>> aString = 'No client class %1, class generation is disabled.'
>>>>>>>>> arg1 = 'Trader_LevelTriggersOrderSignal'
>>>>>>>>> Context PC = 10
>>>>>>>>>
>>>>>>>>> ----------------------------------------------------------------------
>>>>>>>>> GemStone.Gbs.GbxUnmappedClassReplicator>>generateClientClass
>>>>>>>>> Receiver:
>>>>>>>>> a GemStone.Gbs.GbxUnmappedClassReplicator
>>>>>>>>> Instance Variables:
>>>>>>>>> manager = a GemStone.Gbs.GbxReplicatorManager
>>>>>>>>> session = Session 1 (remote) for 'Trader' on '!@gemstone#netldi:40055!gs64stone' @ 'gemstone'
>>>>>>>>> serverClass = a GbxL8Delegate sess: 1 flags: 0 {16r2E79E01}
>>>>>>>>> classDelegate = a GbxL8Delegate sess: 1 flags: 32 {16r2E79C01}
>>>>>>>>> classProxy = 'Not cached'
>>>>>>>>> clientClass = nil
>>>>>>>>> metaclassDelegate = a GbxL8Delegate sess: 1 flags: 0 {16r2E79E01}
>>>>>>>>> metaclassProxy = 'Not cached'
>>>>>>>>> report = GbxL8v3ObjectReport with:
>>>>>>>>> valueBuffSize = 8
>>>>>>>>> namedSize = 1
>>>>>>>>> idxSize = 0
>>>>>>>>> firstOffset = 1
>>>>>>>>> objId = GbxL8BufferOop{16r2E79C01}
>>>>>>>>> objClass = GbxL8BufferOop{16r2E79E01}
>>>>>>>>> segment = 0
>>>>>>>>> objSize = 1
>>>>>>>>> objImpl = 0
>>>>>>>>> isIndexable = false
>>>>>>>>> isInvariant = true
>>>>>>>>> isOverlayed = false
>>>>>>>>> isPartial = false
>>>>>>>>> lacksReadAuth = false
>>>>>>>>> isClamped = false
>>>>>>>>> oops = GbxL8OopArray(16r7FE2101 )
>>>>>>>>> Temporaries:
>>>>>>>>> aClientClass = nil
>>>>>>>>> cname = 'Trader_LevelTriggersOrderSignal'
>>>>>>>>> Context PC = 27
>>>>>>>>>
>>>>>>>>> ----------------------------------------------------------------------
>>>>>>>>> GemStone.Gbs.GbxUnmappedClassReplicator>>findOrGenerateClientClass
>>>>>>>>> Receiver:
>>>>>>>>> a GemStone.Gbs.GbxUnmappedClassReplicator
>>>>>>>>> Instance Variables:
>>>>>>>>> manager = a GemStone.Gbs.GbxReplicatorManager
>>>>>>>>> session = Session 1 (remote) for 'Trader' on '!@gemstone#netldi:40055!gs64stone' @ 'gemstone'
>>>>>>>>> serverClass = a GbxL8Delegate sess: 1 flags: 0 {16r2E79E01}
>>>>>>>>> classDelegate = a GbxL8Delegate sess: 1 flags: 32 {16r2E79C01}
>>>>>>>>> classProxy = 'Not cached'
>>>>>>>>> clientClass = nil
>>>>>>>>> metaclassDelegate = a GbxL8Delegate sess: 1 flags: 0 {16r2E79E01}
>>>>>>>>> metaclassProxy = 'Not cached'
>>>>>>>>> report = GbxL8v3ObjectReport with:
>>>>>>>>> valueBuffSize = 8
>>>>>>>>> namedSize = 1
>>>>>>>>> idxSize = 0
>>>>>>>>> firstOffset = 1
>>>>>>>>> objId = GbxL8BufferOop{16r2E79C01}
>>>>>>>>> objClass = GbxL8BufferOop{16r2E79E01}
>>>>>>>>> segment = 0
>>>>>>>>> objSize = 1
>>>>>>>>> objImpl = 0
>>>>>>>>> isIndexable = false
>>>>>>>>> isInvariant = true
>>>>>>>>> isOverlayed = false
>>>>>>>>> isPartial = false
>>>>>>>>> lacksReadAuth = false
>>>>>>>>> isClamped = false
>>>>>>>>> oops = GbxL8OopArray(16r7FE2101 )
>>>>>>>>> Context PC = 12
>>>>>>>>>
>>>>>>>>> ----------------------------------------------------------------------
>>>>>>>>> GemStone.Gbs.GbxUnmappedClassReplicator>>replicateClassItself
>>>>>>>>> Receiver:
>>>>>>>>> a GemStone.Gbs.GbxUnmappedClassReplicator
>>>>>>>>> Instance Variables:
>>>>>>>>> manager = a GemStone.Gbs.GbxReplicatorManager
>>>>>>>>> session = Session 1 (remote) for 'Trader' on '!@gemstone#netldi:40055!gs64stone' @ 'gemstone'
>>>>>>>>> serverClass = a GbxL8Delegate sess: 1 flags: 0 {16r2E79E01}
>>>>>>>>> classDelegate = a GbxL8Delegate sess: 1 flags: 32 {16r2E79C01}
>>>>>>>>> classProxy = 'Not cached'
>>>>>>>>> clientClass = nil
>>>>>>>>> metaclassDelegate = a GbxL8Delegate sess: 1 flags: 0 {16r2E79E01}
>>>>>>>>> metaclassProxy = 'Not cached'
>>>>>>>>> report = GbxL8v3ObjectReport with:
>>>>>>>>> valueBuffSize = 8
>>>>>>>>> namedSize = 1
>>>>>>>>> idxSize = 0
>>>>>>>>> firstOffset = 1
>>>>>>>>> objId = GbxL8BufferOop{16r2E79C01}
>>>>>>>>> objClass = GbxL8BufferOop{16r2E79E01}
>>>>>>>>> segment = 0
>>>>>>>>> objSize = 1
>>>>>>>>> objImpl = 0
>>>>>>>>> isIndexable = false
>>>>>>>>> isInvariant = true
>>>>>>>>> isOverlayed = false
>>>>>>>>> isPartial = false
>>>>>>>>> lacksReadAuth = false
>>>>>>>>> isClamped = false
>>>>>>>>> oops = GbxL8OopArray(16r7FE2101 )
>>>>>>>>> Context PC = 13
>>>>>>>>>
>>>>>>>>> ----------------------------------------------------------------------
>>>>>>>>> GemStone.Gbs.GbxUnmappedClassReplicator>>forReplication:replicateFromDeferredReport:
>>>>>>>>> Receiver:
>>>>>>>>> a GemStone.Gbs.GbxUnmappedClassReplicator
>>>>>>>>> Instance Variables:
>>>>>>>>> manager = a GemStone.Gbs.GbxReplicatorManager
>>>>>>>>> session = Session 1 (remote) for 'Trader' on '!@gemstone#netldi:40055!gs64stone' @ 'gemstone'
>>>>>>>>> serverClass = a GbxL8Delegate sess: 1 flags: 0 {16r2E79E01}
>>>>>>>>> classDelegate = a GbxL8Delegate sess: 1 flags: 32 {16r2E79C01}
>>>>>>>>> classProxy = 'Not cached'
>>>>>>>>> clientClass = nil
>>>>>>>>> metaclassDelegate = a GbxL8Delegate sess: 1 flags: 0 {16r2E79E01}
>>>>>>>>> metaclassProxy = 'Not cached'
>>>>>>>>> report = GbxL8v3ObjectReport with:
>>>>>>>>> valueBuffSize = 8
>>>>>>>>> namedSize = 1
>>>>>>>>> idxSize = 0
>>>>>>>>> firstOffset = 1
>>>>>>>>> objId = GbxL8BufferOop{16r2E79C01}
>>>>>>>>> objClass = GbxL8BufferOop{16r2E79E01}
>>>>>>>>> segment = 0
>>>>>>>>> objSize = 1
>>>>>>>>> objImpl = 0
>>>>>>>>> isIndexable = false
>>>>>>>>> isInvariant = true
>>>>>>>>> isOverlayed = false
>>>>>>>>> isPartial = false
>>>>>>>>> lacksReadAuth = false
>>>>>>>>> isClamped = false
>>>>>>>>> oops = GbxL8OopArray(16r7FE2101 )
>>>>>>>>> Arguments:
>>>>>>>>> replication = a GemStone.Gbs.GbxReplication
>>>>>>>>> aReport = GbxL8v3ObjectReport with:
>>>>>>>>> valueBuffSize = 8
>>>>>>>>> namedSize = 1
>>>>>>>>> idxSize = 0
>>>>>>>>> firstOffset = 1
>>>>>>>>> objId = GbxL8BufferOop{16r2E79C01}
>>>>>>>>> objClass = GbxL8BufferOop{16r2E79E01}
>>>>>>>>> segment = 0
>>>>>>>>> objSize = 1
>>>>>>>>> objImpl = 0
>>>>>>>>> isIndexable = false
>>>>>>>>> isInvariant = true
>>>>>>>>> isOverlayed = false
>>>>>>>>> isPartial = false
>>>>>>>>> lacksReadAuth = false
>>>>>>>>> isClamped = false
>>>>>>>>> oops = GbxL8OopArray(16r7FE2101 )
>>>>>>>>> Context PC = 26
>>>>>>>>>
>>>>>>>>> ----------------------------------------------------------------------
>>>>>>>>> GemStone.Gbs.GbxReplication>>replicateFromDeferredReport:
>>>>>>>>> Receiver:
>>>>>>>>> a GemStone.Gbs.GbxReplication
>>>>>>>>> Instance Variables:
>>>>>>>>> interaction = a GemStone.Gbs.GbxSingleTripServerTraversal for session 1
>>>>>>>>> replicationSpecSelector: #replicationSpec
>>>>>>>>> , traversal root: a GbxL8Delegate sess: 1 flags: 32 {16r288AF01}
>>>>>>>>> objectsWithDeferredAssignments = an OrderedCollection[40]
>>>>>>>>> reportsWithDeferredElements = an OrderedCollection[0]
>>>>>>>>> reportsWithNoMappedClass = an OrderedCollection[3]
>>>>>>>>> session = Session 1 (remote) for 'Trader' on '!@gemstone#netldi:40055!gs64stone' @ 'gemstone'
>>>>>>>>> Arguments:
>>>>>>>>> report = GbxL8v3ObjectReport with:
>>>>>>>>> valueBuffSize = 8
>>>>>>>>> namedSize = 1
>>>>>>>>> idxSize = 0
>>>>>>>>> firstOffset = 1
>>>>>>>>> objId = GbxL8BufferOop{16r2E79C01}
>>>>>>>>> objClass = GbxL8BufferOop{16r2E79E01}
>>>>>>>>> segment = 0
>>>>>>>>> objSize = 1
>>>>>>>>> objImpl = 0
>>>>>>>>> isIndexable = false
>>>>>>>>> isInvariant = true
>>>>>>>>> isOverlayed = false
>>>>>>>>> isPartial = false
>>>>>>>>> lacksReadAuth = false
>>>>>>>>> isClamped = false
>>>>>>>>> oops = GbxL8OopArray(16r7FE2101 )
>>>>>>>>> Temporaries:
>>>>>>>>> replicator = a GemStone.Gbs.GbxUnmappedClassReplicator
>>>>>>>>> Context PC = 10
>>>>>>>>>
>>>>>>>>> ----------------------------------------------------------------------
>>>>>>>>> optimized [] in GemStone.Gbs.GbxReplication>>resolveUnmappedClasses
>>>>>>>>> Receiver:
>>>>>>>>> an UndefinedObject
>>>>>>>>> Arguments:
>>>>>>>>> aReport = GbxL8v3ObjectReport with:
>>>>>>>>> valueBuffSize = 8
>>>>>>>>> namedSize = 1
>>>>>>>>> idxSize = 0
>>>>>>>>> firstOffset = 1
>>>>>>>>> objId = GbxL8BufferOop{16r2E79C01}
>>>>>>>>> objClass = GbxL8BufferOop{16r2E79E01}
>>>>>>>>> segment = 0
>>>>>>>>> objSize = 1
>>>>>>>>> objImpl = 0
>>>>>>>>> isIndexable = false
>>>>>>>>> isInvariant = true
>>>>>>>>> isOverlayed = false
>>>>>>>>> isPartial = false
>>>>>>>>> lacksReadAuth = false
>>>>>>>>> isClamped = false
>>>>>>>>> oops = GbxL8OopArray(16r7FE2101 )
>>>>>>>>> Temporaries:
>>>>>>>>> .self = a GemStone.Gbs.GbxReplication
>>>>>>>>> Context PC = 18
>>>>>>>>>
>>>>>>>>> ----------------------------------------------------------------------
>>>>>>>>> OrderedCollection>>do:
>>>>>>>>> Receiver:
>>>>>>>>> an OrderedCollection
>>>>>>>>> Instance Variables:
>>>>>>>>> firstIndex = 1
>>>>>>>>> lastIndex = 3
>>>>>>>>> Arguments:
>>>>>>>>> aBlock = BlockClosure [] in GemStone.Gbs.GbxReplication>>resolveUnmappedClasses
>>>>>>>>> Temporaries:
>>>>>>>>> index = 1
>>>>>>>>> Context PC = 17
>>>>>>>>>
>>>>>>>>> ----------------------------------------------------------------------
>>>>>>>>> GemStone.Gbs.GbxReplication>>resolveUnmappedClasses
>>>>>>>>> Receiver:
>>>>>>>>> a GemStone.Gbs.GbxReplication
>>>>>>>>> Instance Variables:
>>>>>>>>> interaction = a GemStone.Gbs.GbxSingleTripServerTraversal for session 1
>>>>>>>>> replicationSpecSelector: #replicationSpec
>>>>>>>>> , traversal root: a GbxL8Delegate sess: 1 flags: 32 {16r288AF01}
>>>>>>>>> objectsWithDeferredAssignments = an OrderedCollection[40]
>>>>>>>>> reportsWithDeferredElements = an OrderedCollection[0]
>>>>>>>>> reportsWithNoMappedClass = an OrderedCollection[3]
>>>>>>>>> session = Session 1 (remote) for 'Trader' on '!@gemstone#netldi:40055!gs64stone' @ 'gemstone'
>>>>>>>>> Context PC = 8
>>>>>>>>>
>>>>>>>>> ----------------------------------------------------------------------
>>>>>>>>> optimized [] in GemStone.Gbs.GbxReplication>>resolve
>>>>>>>>> Receiver:
>>>>>>>>> an UndefinedObject
>>>>>>>>> Temporaries:
>>>>>>>>> .self = a GemStone.Gbs.GbxReplication
>>>>>>>>> Context PC = 7
>>>>>>>>>
>>>>
>>
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