diff options
Diffstat (limited to 'innobase/lock/lock0lock.c')
| -rw-r--r-- | innobase/lock/lock0lock.c | 30 |
1 files changed, 21 insertions, 9 deletions
diff --git a/innobase/lock/lock0lock.c b/innobase/lock/lock0lock.c index 06475c8ef7e..77dfca5fdf4 100644 --- a/innobase/lock/lock0lock.c +++ b/innobase/lock/lock0lock.c @@ -3259,12 +3259,6 @@ lock_deadlock_recursive( *cost = *cost + 1; - if ((depth > LOCK_MAX_DEPTH_IN_DEADLOCK_CHECK) - || (*cost > LOCK_MAX_N_STEPS_IN_DEADLOCK_CHECK)) { - - return(LOCK_VICTIM_IS_START); - } - lock = wait_lock; if (lock_get_type(wait_lock) == LOCK_REC) { @@ -3296,11 +3290,18 @@ lock_deadlock_recursive( if (lock_has_to_wait(wait_lock, lock)) { + ibool too_far + = depth > LOCK_MAX_DEPTH_IN_DEADLOCK_CHECK + || *cost > LOCK_MAX_N_STEPS_IN_DEADLOCK_CHECK; + lock_trx = lock->trx; - if (lock_trx == start) { + if (lock_trx == start || too_far) { + /* We came back to the recursion starting - point: a deadlock detected */ + point: a deadlock detected; or we have + searched the waits-for graph too long */ + FILE* ef = lock_latest_err_file; rewind(ef); @@ -3342,9 +3343,20 @@ lock_deadlock_recursive( } #ifdef UNIV_DEBUG if (lock_print_waits) { - fputs("Deadlock detected\n", stderr); + fputs("Deadlock detected" + " or too long search\n", + stderr); } #endif /* UNIV_DEBUG */ + if (too_far) { + + fputs("TOO DEEP OR LONG SEARCH" + " IN THE LOCK TABLE" + " WAITS-FOR GRAPH\n", ef); + + return(LOCK_VICTIM_IS_START); + } + if (ut_dulint_cmp(wait_lock->trx->undo_no, start->undo_no) >= 0) { /* Our recursion starting point |