hyc@symas.com wrote:

marvin.mundry@uni-hamburg.de wrote:

...

Full_Name: Marvin Mundry Version: 2.4.33 OS: Ubuntu 12.10 URL: https://idmswiki.rrz.uni-hamburg.de:8005/debug.tar.bz Submission from: (NULL) (134.100.2.183)

Thanks for the report. The crash has been fixed in git, but your test runs into another (known) issue in MDB.

You're working with a very large entry, which libmdb stores in overflow pages. In the current version of libmdb, freespace management for overflow pages is not fully implemented, so every time you update the entry libmdb will always use new pages (instead of reusing old pages). Thus, after a few hundred operations, your 1GB map will be exhausted.

It looks like you won't be able to use back-mdb until this feature is fully implemented in libmdb.

The overflow page freespace management issue is being addressed in ITS#7455. A patch is currently being tested.