hyc@symas.com wrote:

sergej.jurecko@gmail.com wrote:

...

Full_Name: Sergej Jurečko Version: lmdb 0.9.16 OS: osx URL: ftp://ftp.openldap.org/incoming/delerror.zip Submission from: (NULL) (193.189.172.218)

Code and lmdb file is uploaded to ftp. Code is also here: https://gist.github.com/SergejJurecko/68979ff6460806581ad5

If you run the code on the uploaded lmdb file, it will result in MDB_PAGE_FULL error out of mdb_cursor_del.

I use dupsorts a lot in my app. Every value in the dupsort has 2 64bit integers and 1 u8 in the beginning, which are used in the custom comparison function to sort the values.

During normal operation values are added to the end of the dupsort and eventually a cleanup operation occurs that deletes unused values.

The example app tries to delete the first value in the dupsort. But it will fail the same if it tries to delete the next one instead.

Thanks for the code and data, it shows the problem pretty clearly. Unfortunately the solution is less obvious at the moment, still working on it.

Fixed now in mdb.master, please test and followup with results. Thanks.