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- 17 Mar, 2004 2 commits
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Tim Peters authored
FileStorageError: The database has already been packed to a later time or no changes have been made since the last pack exception. Instead that message is logged (at INFO level), and the pack attempt simply returns then (no pack is performed). Incidentally, this should repair frequent reports of failure in the new checkPackLotsWhileWriting test. On non-Windows systems, it seems that the worker thread often didn't get enough cycles to commit a change between the main thread's attempts to run pack() (and so the exception above got raised then).
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Tim Peters authored
thread is interesting here, so removed the hair catering to the possiblity of N > 1 threads.
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- 16 Mar, 2004 11 commits
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Tim Peters authored
failures in the ZEO FileStorage pack-while-writing tests, where they die with CorruptedError: ... transaction with checkpoint flag set By coincidence, the same kind of death during pack() was reported on zodb-dev today(!). The new checkPackLotsWhileWriting test provokes this on my box reliably (failed each time it was run). The problem appears to be that pack's idea of where a FileStorage ends was obtained merely by seeking to the end of the file. But if a transaction is in progress, there can be an extra "not really there yet" transaction at the end of the file, and when either buildPackIndex() or findReachableFromFuture() bumped into a such a thing, the CorruptedError above got raised. This is always rare, and was exceedingly rare before because only one pack per test was tried. The new test tries packing repeatedly while a thread keeps hammering the database, so is much more likely to provoke the problem. The fix amounts to passing FileStorage._pos to the pack code, telling the latter directly where the legit transactions in the file end.
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Tim Peters authored
The only values _packt ever had were z64 and None. The only thing _packt was used for that appeared to make sense was to block undo while a pack was in progress, and a bool works better for that. tids were compared to _packt in a few spots, but since the only values _packt could have were in {z64, None}, the comparisons were doomed to (regardless of tid) return "greater than" (z64) or to be undefined (None; although in recent Pythons None is reliably less than objects of other types, so "greater than" was the only outcome possible from these comparisons under 2.3.3). Removed these comparisons, collapsing surrounding expressions to equivalents taking into account that tid < self._packt was always false.
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Fred Drake authored
- remove old XXX comments: we have added information on schema, and no, we really don't want to talk about "handlers" -- they're evil
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Fred Drake authored
context
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Tim Peters authored
it, and the only value a subclass ever set it to was None.
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Tim Peters authored
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Tim Peters authored
FileStoragePacker's constructor mean.
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Fred Drake authored
<key name="+">; keys need to be provided for each default value - fix bug in converting an empty section that contained a <multikey name="+"> - document <default> element in reference manual and DTD - more tests
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Tim Peters authored
a two-state flag, with possible values z64 or None -- eh?).
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Jeremy Hylton authored
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Jeremy Hylton authored
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- 15 Mar, 2004 1 commit
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Tim Peters authored
record's "status byte" are and mean.
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- 13 Mar, 2004 3 commits
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Jeremy Hylton authored
Make _added_during_commit a regular instance variable. Don't use try/finally to reset it; just clear it at the start of a transaction. XXX There was a test that needed to be removed, but it seemed to be just a shallow test that try/finally was used. Can't see any feature that depends on specific of error handling: The txn is going to abort. Remove unused _opened instance variable. Split commit() into two smaller parts. Get rid of extra manipulation of _creating. Don't look for _p_serial of None; z64 is now required. Undo local variable aliases in subtransaction methods. Also, trivial change to pickle cache API -- get() works like dict get().
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Jeremy Hylton authored
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Tim Peters authored
with CorruptedError: ... transaction with checkpoint flag set on my box when doing the ZEO flavor of FileStorage. This is like the other pack-while-writing tests, but uses only 1 client thread that does twice as much, and packs repeatedly for so long as that thread runs. I usually see it fail before the fourth pack attempt.
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- 12 Mar, 2004 17 commits
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Tim Peters authored
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Tim Peters authored
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Tim Peters authored
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Tim Peters authored
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Tim Peters authored
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Jeremy Hylton authored
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Tim Peters authored
This makes the ZEO flavors of the tests much more likely to complete without a "thread still alive" failure.
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Tim Peters authored
Forcing the output even when a test passes is interesting on my box. When ZEO is involved, a single ClientThread tends to run all the way to completion before another ClientThread manages to sneak in -- apart from their first transactions, it's as if we ran one thread, then started the next after the first finished (etc). When ZEO isn't involved, threads take turns. When I see failures, they involve ZEO. It's possible that 30 seconds just isn't long enough to wait on this box.
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Jeremy Hylton authored
Drop several possible tasks that didn't seem relevant, e.g. _p_independent() tests elsewhere should cover it just fine.
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Jeremy Hylton authored
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Jeremy Hylton authored
It's clear in hindsight that the connection only loads non-current revisions for objects that have been invalidated. Thus, we never need to track them to invalidate stale objects; they'll be invalidated anyway. And loadBefore() will never return a current revision, because it would only be called if the current revision could not be used.
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Jeremy Hylton authored
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Jeremy Hylton authored
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Jeremy Hylton authored
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Tim Peters authored
an unexpectedly live thread at the end. That's been happening forever, but never when I stare at it, and the more I stare at those tests the more baffled I am that it ever fails this way. So the point here is to get more clues when nobody is staring at it <wink>.
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Jeremy Hylton authored
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Jeremy Hylton authored
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- 11 Mar, 2004 6 commits
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Jeremy Hylton authored
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Jeremy Hylton authored
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Jeremy Hylton authored
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Jeremy Hylton authored
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Jeremy Hylton authored
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Jeremy Hylton authored
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