On Mon, 2017-10-16 at 11:51 +0100, Howard Chu wrote: > > > > It appears that it couldn't mark a page as dirty. > > Here is the relevant assertion from mdb_page_dirty: > > rc = insert(txn->mt_u.dirty_list, &mid); > > mdb_tassert(txn, rc == 0); // assertion failed > > > > What might I be doing wrong in my application that triggers this > > sort > > of error? > > Take a look at the value of rc, then look in midl.c.
I've taken a look. The value of rc is -1, which according to the mdb_mid2l_insert code means that it's a duplicate value, so the page is already in the txn's dirty pages list. Since it comes from an mdb_page_alloc call, it is a bit weird that the newly allocated page is already on the list, but maybe it's a reused page? > Most likely the dirty > list is too big, which means you're trying to do too much in a single > transaction. The code did work on the compacted database, and it was doing exactly the same operations on it, so this was unlikely. - Timur
