New subject: [Issue 10575] MDB_WRITEMAP commit fails on Windows without MDB_NOSYNC on 1.0.1

18 Aug 2026


      https://bugs.openldap.org/show_bug.cgi?id=10575
Issue ID: 10575
           Summary: MDB_WRITEMAP commit fails on Windows without
                    MDB_NOSYNC on 1.0.1
           Product: LMDB
           Version: 1.0.1
          Hardware: x86_64
                OS: Windows
            Status: UNCONFIRMED
          Keywords: needs_review
          Severity: normal
          Priority: ---
         Component: liblmdb
          Assignee: bugs@openldap.org
          Reporter: github@nicwatson.org
  Target Milestone: ---
Created attachment 1194
  --> https://bugs.openldap.org/attachment.cgi?id=1194&action=edit
reproducer
On Windows, an environment opened with MDB_WRITEMAP cannot commit a write
transaction unless MDB_NOSYNC or MDB_NOMETASYNC is also set. mdb_txn_commit()
fails with ERROR_INVALID_HANDLE.
See attached for reproducer.
This does not impact Linux, MacOS, or the .9.* series.
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[Issue 10575] New: MDB_WRITEMAP commit fails on Windows without MDB_NOSYNC on 1.0.1