Andrew Spott wrote: > Can I use `mdb_dump | mdb_load` (roughly) to get the db back to a stable > state? Any ideas what is going on? I have no idea how to reproduce this > bug, so I'm > not sure what to put in a bug report... and I can't share the db.
Yes, mdb_dump feeding mdb_load should give you a stable DB. > > -Andrew > > On Tue, Nov 19, 2019 at 1:23 PM Andrew Spott <[email protected] > <mailto:[email protected]>> wrote: > > mdb_dump didn't complain. > > -Andrew > > On Tue, Nov 19, 2019 at 9:49 AM Howard Chu <[email protected] > <mailto:[email protected]>> wrote: > > Andrew Spott wrote: > > When looking at the code for mdb_env_copyfd1 (the copy with > compaction function), there is this clause[0]: > > > > if (rc == MDB_SUCCESS && root != new_root) { > > rc = MDB_INCOMPATIBLE; /* page leak or corrupt DB */ > > } > > > > > > Since this happens at the end of the function, and I'm seeing the > mdb_copy -c takes a while, I figured this was the error that I was seeing. > > > > If this isn't it, then what am I looking at? If it is a corrupt > DB, is there anything I can do to figure out how to fix this? > > Try using mdb_dump to get a backup instead, see if it succeeds or > complains. > > > > [0] > https://github.com/LMDB/lmdb/blob/c3e6b4209eed13af4a3670e5f04f42169c08e5c6/libraries/liblmdb/mdb.c#L10311-L10312 > > > > -Andrew > > > > On Sat, Nov 16, 2019 at 7:24 AM Howard Chu <[email protected] > <mailto:[email protected]> <mailto:[email protected] <mailto:[email protected]>>> > wrote: > > > > Andrew Spott wrote: > > > I apologize if this is the wrong place to ask this, let me > know if there is someplace better. > > > > > > So, when doing a `mdb_copy -c`, I've run into the error > message: > > > > > > mdb_copy: copying failed, error -30784 (MDB_INCOMPATIBLE: > Operation and DB incompatible, or DB flags changed) > > > > > > When looking at the mdb_copy man page, it says that mdb_copy > with compaction might fail if the database has a 'page leak'. > > > > > > Since that appears to be what has happened... > > > > The error message you got has nothing to do with a page leak. > > > > > can anyone tell me what that means? Does this mean that the > data could be corrupted? How do I fix this? > > > > > > Thanks! > > > > > > -Andew -- -- Howard Chu CTO, Symas Corp. http://www.symas.com Director, Highland Sun http://highlandsun.com/hyc/ Chief Architect, OpenLDAP http://www.openldap.org/project/
