[elephant-devel] Error: The slot ELEPHANT::INSTANCE-TABLE is unbound

[Red Daly]

When I try to open a controller of mine, I get this error:

The slot ELEPHANT::INSTANCE-TABLE is unbound in the object
#<BDB-STORE-CONTROLLER ...>

It seems that this is caused by a bug with how the instance-table is
established in a new controller, since the stack trace indicates this
bug occurs when the INSTANCE-TABLE slot is being set up.
Specifically, at this line in bdb-controller.lisp:


      (setf (slot-value sc 'instance-table)
              (if (or new-p (elephant::prior-version-p
(database-version sc) '(0 9 1)))
                  ;; When opening the DB equal or prior to 0.9.1,
always get the indices initialized,
                  ;; regardless of the indices is initialized before.
                  ;; Even the indices is serialized before(in the case
that open the <=0.9.1 DB file for the second time),
                  ;; it still can not be unserialized here, because
its persistent object's oid
                  ;; does not match the hardcoded one in
oid->schema-id, which only work on the DB file
                  ;; created in release > 0.9.1.
                  (make-instance 'bdb-indexed-btree :from-oid -3 :sc
sc :indices (make-hash-table))
>>>>                  (make-instance 'bdb-indexed-btree :from-oid -3 :sc sc))) <<<<


I will work on a fix now.  If anybody has insights, gotchas, etc. let
me know.  A patch soon to follow...

The slot ELEPHANT::INSTANCE-TABLE is unbound in the object
#<BDB-STORE-CONTROLLER /apps/bookllama-dev/server/data/production/>.
   [Condition of type UNBOUND-SLOT]

Restarts:
 0: [USE-VALUE] Return a value as the slot-value.
 1: [STORE-VALUE] Store and return a value as the slot-value.
 2: [RETRY] Retry SLIME REPL evaluation request.
 3: [ABORT] Return to SLIME's top level.
 4: [TERMINATE-THREAD] Terminate this thread (#<THREAD
"new-repl-thread" RUNNING {10054B88F1}>)

Backtrace:
  0: ((SB-PCL::FAST-METHOD SLOT-UNBOUND (T T T)) ..)
  1: (SB-PCL::SLOT-UNBOUND-INTERNAL #<BDB-STORE-CONTROLLER
/apps/bookllama-dev/server/data/production/> 9)
  2: ((SB-PCL::FAST-METHOD ELEPHANT::OID->SCHEMA-ID (T
ELEPHANT:STORE-CONTROLLER)) #<unavailable lambda list>)
  3: ((SB-PCL::FAST-METHOD ELEPHANT::GET-INSTANCE-CLASS
(ELEPHANT:STORE-CONTROLLER T)) #<unavailable lambda list>)
  4: ((FLET SB-THREAD::WITH-RECURSIVE-LOCK-THUNK))
  5: ((FLET #:WITHOUT-INTERRUPTS-BODY-[CALL-WITH-RECURSIVE-LOCK]324))
  6: (SB-THREAD::CALL-WITH-RECURSIVE-LOCK ..)
  7: ((FLET #:FORM-FUN-[CONTROLLER-RECREATE-INSTANCE]14))
  8: ((SB-PCL::FAST-METHOD ELEPHANT::CONTROLLER-RECREATE-INSTANCE
(ELEPHANT:STORE-CONTROLLER T)) ..)
  9: ((LABELS ELEPHANT-SERIALIZER2::%DESERIALIZE)
#S(ELEPHANT-MEMUTIL:BUFFER-STREAM :BUFFER
#<SB-ALIEN-INTERNALS:ALIEN-VALUE :SAP #X00650120 :TYPE (* #)> :SIZE 76
:POSITION 76 :LENGTH 80))
 10: ((LABELS ELEPHANT-SERIALIZER2::%DESERIALIZE)
#S(ELEPHANT-MEMUTIL:BUFFER-STREAM :BUFFER
#<SB-ALIEN-INTERNALS:ALIEN-VALUE :SAP #X00650120 :TYPE (* #)> :SIZE 76
:POSITION 76 :LENGTH 80))
 11: (ELEPHANT-SERIALIZER2::DESERIALIZE ..)
 12: ((FLET #:FORM-FUN-[DESERIALIZE]2))
 13: (ELEPHANT::DESERIALIZE ..)
 14: ((LAMBDA ()) #<unavailable lambda list>)
 15: (SLOT-VALUE #<BDB-INDEXED-BTREE oid:-3> DB-BDB::INDICES)
 16: ((SB-PCL::FAST-METHOD SHARED-INITIALIZE :AFTER
(DB-BDB::BDB-INDEXED-BTREE T)) #<unavailable lambda list>)[:EXTERNAL]
 17: ((LAMBDA (SB-PCL::.PV. SB-PCL::.NEXT-METHOD-CALL. SB-PCL::.ARG0.
SB-PCL::.ARG1. SB-INT:&MORE SB-PCL::.DFUN-MORE-CONTEXT.
SB-PCL::.DFUN-MORE-COUNT.)) ..)
 18: ((SB-PCL::FAST-METHOD SHARED-INITIALIZE :AROUND
(ELEPHANT:PERSISTENT-OBJECT T)) #<unavailable argument> #<unavailable
argument> #<unavailable argument> #<unavailable argument>)[:EXTERNAL]
 19: ((LAMBDA (SB-PCL::.PV. SB-PCL::.NEXT-METHOD-CALL. SB-PCL::.ARG0.
SB-INT:&MORE SB-PCL::.DFUN-MORE-CONTEXT. SB-PCL::.DFUN-MORE-COUNT.))
..)
 20: (SB-PCL::FAST-MAKE-INSTANCE #<unavailable argument>)[:EXTERNAL]
 21: ((LAMBDA ()))
 22: ((SB-PCL::FAST-METHOD ELEPHANT::EXECUTE-TRANSACTION
(DB-BDB::BDB-STORE-CONTROLLER T)) #<unavailable argument>
#<unavailable argument> #<unavailable argument> #<unavailable
argument>)[:EXTERNAL]
 23: ((SB-PCL::FAST-METHOD ELEPHANT::OPEN-CONTROLLER
(DB-BDB::BDB-STORE-CONTROLLER)) #(13 NIL 9 NIL 3 NIL ...) #<unused
argument> #<BDB-STORE-CONTROLLER
/apps/bookllama-dev/server/data/production/>)[:EXTER..
 24: ((LAMBDA (SB-PCL::.PV. SB-PCL::.NEXT-METHOD-CALL. SB-PCL::.ARG0.
SB-INT:&MORE SB-PCL::.DFUN-MORE-CONTEXT. SB-PCL::.DFUN-MORE-COUNT.))
..)
 25: (ELEPHANT:OPEN-STORE #<unavailable lambda list>)[:EXTERNAL]


-- Red