diff options
Diffstat (limited to 'storage/xtradb/srv/srv0srv.cc')
| -rw-r--r-- | storage/xtradb/srv/srv0srv.cc | 32 |
1 files changed, 16 insertions, 16 deletions
diff --git a/storage/xtradb/srv/srv0srv.cc b/storage/xtradb/srv/srv0srv.cc index 794b119a090..c98bfc85086 100644 --- a/storage/xtradb/srv/srv0srv.cc +++ b/storage/xtradb/srv/srv0srv.cc @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1995, 2015, Oracle and/or its affiliates. All Rights Reserved. +Copyright (c) 1995, 2016, Oracle and/or its affiliates. All Rights Reserved. Copyright (c) 2008, 2009 Google Inc. Copyright (c) 2009, Percona Inc. Copyright (c) 2013, 2014, SkySQL Ab. All Rights Reserved. @@ -2243,6 +2243,8 @@ exit_func: /*********************************************************************//** A thread which prints warnings about semaphore waits which have lasted too long. These can be used to track bugs which cause hangs. +Note: In order to make sync_arr_wake_threads_if_sema_free work as expected, +we should avoid waiting any mutexes in this function! @return a dummy parameter */ extern "C" UNIV_INTERN os_thread_ret_t @@ -2282,23 +2284,21 @@ loop: /* Try to track a strange bug reported by Harald Fuchs and others, where the lsn seems to decrease at times */ - /* We have to use nowait to ensure we don't block */ - new_lsn= log_get_lsn_nowait(); - - if (new_lsn && new_lsn < old_lsn) { - ut_print_timestamp(stderr); - fprintf(stderr, - " InnoDB: Error: old log sequence number " LSN_PF - " was greater\n" - "InnoDB: than the new log sequence number " LSN_PF "!\n" - "InnoDB: Please submit a bug report" - " to http://bugs.mysql.com\n", - old_lsn, new_lsn); - ut_ad(0); - } + if (log_peek_lsn(&new_lsn)) { + if (new_lsn < old_lsn) { + ut_print_timestamp(stderr); + fprintf(stderr, + " InnoDB: Error: old log sequence number " LSN_PF + " was greater\n" + "InnoDB: than the new log sequence number " LSN_PF "!\n" + "InnoDB: Please submit a bug report" + " to http://bugs.mysql.com\n", + old_lsn, new_lsn); + ut_ad(0); + } - if (new_lsn) old_lsn = new_lsn; + } if (difftime(time(NULL), srv_last_monitor_time) > 60) { /* We referesh InnoDB Monitor values so that averages are |