[Xapian-discuss] Threaded test (in C++) to reproduce our database problems

[Eric B. Ridge]

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>> Writer:  ERROR=Db block overwritten
> 
> But the writer thread shouldn't get this unless there's another writer.

Did you mean "writer to the same database" or "writer to ANY database"???

I've hacked up the C++ thread test to do this:

- 2 Writer threads.  Each to a *different* database
- ZERO! reader threads.

In theory, these guys should not interfere with each other, right?  Or am I
clueless here too?

Check this out:

----------------------------
$ rm -rf /tmp/*.db && build/xapian_threads
Opening /tmp/one.db
Opening /tmp/two.db
Writer /tmp/one.db: flush()
Writer /tmp/two.db: flush()
<repeats a bunch of times>
Writer /tmp/one.db: flush()
Writer /tmp/two.db: flush()
Writer /tmp/one.db: flush()
Writer /tmp/two.db: ERROR=Db block overwritten
Writer /tmp/two.db thread unexpectedly exited...
Writer /tmp/one.db: ERROR=Error reading block 44: got end of file
Writer /tmp/one.db thread unexpectedly exited...
-----------------------------

Explain this one.  ;)  Now I'm really stumped.  Can't write to two separate
databases at a time?  Hmm...

eric


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