/* Begin our transaction. */
        ret = envp->txn_begin(envp, NULL, &txn, 0);

        //write transaction timeout 5 second
        ret = txn->set_timeout(txn, 5000000, DB_SET_TXN_TIMEOUT);

        for (j = 0; j < 10; j++) {
             ... ...      ... ...

            /* Perform the database put. */
            switch (ret = dbp->put(dbp, txn, &key, &value, 0)) {
                case 0:
                    break;
                case DB_KEYEXIST:
                    printf("Got keyexists.\n");
                    break;
                case DB_LOCK_DEADLOCK:
                    (void)txn->abort(txn);
                    if (retry_count < max_retries) {
                        retry_count++;
                        goto retry;
                    }
                    return (EXIT_FAILURE);
                default:
                    envp->err(envp, ret, "db put failed");
                    ret = txn->abort(txn);
                    if (ret != 0)
                        envp->err(envp, ret, "txn abort failed");
                    return (EXIT_FAILURE);
             } /** End case statement **/

        }   /** End for loop **/  


        ret = txn->commit(txn, 0);