Hi after restarting my ubuntu server seems like zimbra wont start ... stuck at ldap

Starting ldap...Done.
Failed.
Failed to start slapd. Attempting debug start to determine error.
bdb_db_close: database "": txn_checkpoint failed: Invalid argument (22).
backend_startup_one (type=hdb, suffix=""): bi_db_open failed! (12)
bdb_db_close: database "": alock_close failed

anyone could help?