[elephant-devel] Strange behavior with indexed-btree
Kevin Raison
raison at chatsubo.net
Thu Jan 8 16:48:48 UTC 2009
I am seeing this issue with both the alpha tag and the latest head.
Ian Eslick wrote:
> Sorry, this indicate a fresh DB. Which version of 1.0 are you using -
> the alpha tag or the latest head?
>
> Sent from my iPhone
>
> On Jan 7, 2009, at 9:35 PM, Kevin Raison <raison at chatsubo.net> wrote:
>
>> I apologize for replying to my own reply, but in the process of
>> recreating this from a fresh bdb, i noticed another artifact of the
>> error condition. Before the unbound slot errors begin to appear, I
>> get
>> an ELEPHANT:ELEPHANT-TYPE-DESERIALIZATION-ERROR; just once, and then
>> the unbound slot errors start happening. A trace of the
>> deserialization
>> error follows:
>>
>> Condition ELEPHANT:ELEPHANT-TYPE-DESERIALIZATION-ERROR was signalled.
>> [Condition of type ELEPHANT:ELEPHANT-TYPE-DESERIALIZATION-ERROR]
>>
>> Restarts:
>> 0: [TERMINATE-THREAD] Terminate this thread (#<THREAD
>> "pcall-worker-50" RUNNING {1003C18CE1}>)
>>
>> Backtrace:
>> 0: ((LABELS ELEPHANT-SERIALIZER2::%DESERIALIZE) #<unavailable lambda
>> list>)
>> 1: ((LABELS ELEPHANT-SERIALIZER2::%DESERIALIZE) #<unavailable lambda
>> list>)
>> 2: (ELEPHANT-SERIALIZER2::DESERIALIZE #<unavailable lambda list>)
>> 3: (ELEPHANT::DESERIALIZE ..)
>> 4: ((SB-PCL::FAST-METHOD ELEPHANT::PERSISTENT-SLOT-READER
>> (DB-BDB::BDB-STORE-CONTROLLER T T)) #<unavailable lambda list>)
>> 5: (SLOT-VALUE #<BDB-INDEXED-BTREE oid:7565> DB-BDB::INDICES)
>> 6: ((SB-PCL::FAST-METHOD SHARED-INITIALIZE :AFTER
>> (DB-BDB::BDB-INDEXED-BTREE T)) #<unavailable lambda list>)[:EXTERNAL]
>> 7: ((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.)) ..)
>> 8: ((SB-PCL::FAST-METHOD SHARED-INITIALIZE :AROUND
>> (ELEPHANT:PERSISTENT-OBJECT T)) #<unavailable argument> #<unavailable
>> argument> #<unavailable argument> #<unavailable argument>)[:EXTERNAL]
>> 9: ((SB-PCL::FAST-METHOD ELEPHANT::RECREATE-INSTANCE
>> (ELEPHANT:PERSISTENT-COLLECTION)) #<unavailable argument>
>> #<unavailable
>> argument> #<unavailable argument>)[:EXTERNAL]
>> 10: ((SB-PCL::FAST-METHOD ELEPHANT::CONTROLLER-RECREATE-INSTANCE
>> (ELEPHANT:STORE-CONTROLLER T)) #<unused argument> #<unused argument>
>> #<BDB-STORE-CONTROLLER /srv/console/syslog/> 7565 NIL)
>> 11: ((LABELS ELEPHANT-SERIALIZER2::%DESERIALIZE) #<unavailable lambda
>> list>)
>> 12: (ELEPHANT-SERIALIZER2::DESERIALIZE #<unavailable lambda list>)
>> 13: (ELEPHANT::DESERIALIZE ..)
>> 14: ((SB-PCL::FAST-METHOD ELEPHANT:GET-VALUE (T DB-BDB::BDB-BTREE))
>> #<unavailable lambda list>)
>> 15: ((SB-PCL::FAST-METHOD CONSOLE::INDEX-LOG-ENTRY
>> (CONSOLE::LOG-ENTRY)) #<unavailable argument> #<unavailable argument>
>> #<LOG-ENTRY oid:10076>)
>> 16: ((LAMBDA ()))
>> 17: ((SB-PCL::FAST-METHOD ELEPHANT::EXECUTE-TRANSACTION
>> (DB-BDB::BDB-STORE-CONTROLLER T)) #<unavailable argument>
>> #<unavailable
>> argument> #<unavailable argument> #<unavailable argument>)[:EXTERNAL]
>> 18: (CONSOLE::ADD-LOG-ENTRY ..)
>>
>>
>> Kevin Raison wrote:
>>> I was finally able to recreate this in the repl (as opposed to
>>> seeing it
>>> in my error logs), so here is a trace:
>>>
>>> The slot DB-BDB::INDICES-CACHE is unbound in the object
>>> #<BDB-INDEXED-BTREE oid:2>.
>>> [Condition of type UNBOUND-SLOT]
>>>
>>> Backtrace:
>>> 0: ((SB-PCL::FAST-METHOD SLOT-UNBOUND (T T T)) #<unavailable
>>> argument> #<unavailable argument> #<unavailable argument>
>>> #<BDB-INDEXED-BTREE oid:2> DB-BDB::INDICES-CACHE)
>>> 1: (SB-PCL::SLOT-UNBOUND-INTERNAL #<BDB-INDEXED-BTREE oid:2> 2)
>>> 2: ((SB-PCL::FAST-METHOD (SETF GET-VALUE) (T T
>>> DB-BDB::BDB-INDEXED-BTREE)) #<unavailable lambda list>)
>>> 3: ((LAMBDA (WORD)) "34766")
>>> 4: (SB-IMPL::MAP1 #<CLOSURE (LAMBDA #) {1003CA4ED9}> (("" "asa"
>>> "106007" "deny" "inbound" "udp" ...)) :LIST T)
>>> 5: (MAPCAR #<CLOSURE (LAMBDA #) {1003CA4ED9}> ("" "asa" "106007"
>>> "deny" "inbound" "udp" ...))[:EXTERNAL]
>>> 6: ((SB-PCL::FAST-METHOD INDEX-LOG-ENTRY (LOG-ENTRY)) #<unavailable
>>> argument> #<unavailable argument> #<LOG-ENTRY oid:6373>)
>>> 7: ((LAMBDA ()))
>>> 8: ((SB-PCL::FAST-METHOD ELEPHANT::EXECUTE-TRANSACTION
>>> (DB-BDB::BDB-STORE-CONTROLLER T)) #<unavailable argument>
>>> #<unavailable
>>> argument> #<unavailable argument> #<unavailable argument>)[:EXTERNAL]
>>> 9: (ADD-LOG-ENTRY ..)
>>> 10: (SB-INT:SIMPLE-EVAL-IN-LEXENV ..)
>>>
>>> And here is the code that sometimes causes the issue:
>>> (defmethod index-log-entry ((log-entry log-entry))
>>> (let ((*store-controller* *syslog-controller*))
>>> (let ((btree (get-from-root "log-entry-index" :sc
>>> *syslog-controller*)))
>>> (map-words #'(lambda (word)
>>> (unless (or (member word *superfluous-
>>> words* :test
>>> #'string-equal)
>>> (< (length word) 2))
>>> (unless (existsp word btree)
>>> (setf (get-value word btree) (make-pset :sc
>>> *syslog-controller*)))
>>> (insert-item log-entry
>>> (get-value word btree))))
>>> (text log-entry)))))
>>>
>>>
>>> If I drop and recreate the btree, everything runs smoothly (no
>>> errors)
>>> for a few hours and then the above error message starts showing up
>>> about
>>> half to three quarters of the time.
>>>
>>> Thanks again,
>>> Kevin
>>>
>>>
>>> Kevin Raison wrote:
>>>> I am seeing an intermittent error with 1.0 alpha when trying to
>>>> write to
>>>> an indexed btree (using BerkeleyDB 4.7 as provided by Ubuntu's
>>>> package
>>>> repositories):
>>>>
>>>> The slot DB-BDB::INDICES-CACHE is unbound in the object
>>>> #<BDB-INDEXED-BTREE oid:2>
>>>>
>>>> Within the same thread, sometimes this happens and sometimes I am
>>>> able
>>>> to read and write to the btree. I am using sbcl 1.0.24 on 32 bit
>>>> intel
>>>> linux. Is there something obvious that might help alleviate this or
>>>> should I provide more context?
>>>>
>>>> Thanks!
>>>> Kevin
>>>>
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