https://bugs.openldap.org/show_bug.cgi?id=10316
Issue ID: 10316 Summary: build/lib/mdb.c:5882: Assertion 'IS_BRANCH(mc->mc_pg[mc->mc_top])' failed in mdb_cursor_sibling() Product: LMDB Version: unspecified Hardware: All OS: All Status: UNCONFIRMED Keywords: needs_review Severity: normal Priority: --- Component: liblmdb Assignee: bugs@openldap.org Reporter: stefan@konink.de Target Milestone: ---
I am developing ETL software in Python and I am using lmdb as backend. For this I am using https://github.com/jnwatson/py-lmdb
In this big process I am resizing the map_size dynamically. I would say it is certainly possible that I am reading at the same time. I end up in the following error:
build/lib/mdb.c:5882: Assertion 'IS_BRANCH(mc->mc_pg[mc->mc_top])' failed in mdb_cursor_sibling()
I ran my application again with a predetermined map size, and it did not assert. Since it is a single shot, I don't know if I can be certain that it therefore does not happen.
When searching for it I found the following issue from 2017, suggesting it can be reproduced when running the performance test.
https://github.com/bnclabs/dbperf/issues/1