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| author | Luis Soares <luis.soares@sun.com> | 2010-05-24 17:43:27 +0100 |
|---|---|---|
| committer | Luis Soares <luis.soares@sun.com> | 2010-05-24 17:43:27 +0100 |
| commit | 92064b8116cf42d430d68a2ae13f203db5fb8882 (patch) | |
| tree | 662309c6fb769c80aa4c7d772a701824b6edd56a /sql/rpl_rli.cc | |
| parent | ca0aa95c6d624d861f623b7719c950c9e43a8425 (diff) | |
| download | mariadb-git-92064b8116cf42d430d68a2ae13f203db5fb8882.tar.gz | |
BUG#53657: Slave crashed with error 22 when trying to lock mutex
at mf_iocache.c, line 1722
The slave crashed while two threads: IO thread and user thread
raced for the same mutex (the append_buffer_lock protecting the
relay log's IO_CACHE). The IO thread was trying to flush the
cache, and for that was grabbing the append_buffer_lock.
However, the other thread was closing and reopening the relay log
when the IO thread tried to lock. Closing and reopening the log
includes destroying and reinitialising the IO_CACHE
mutex. Therefore, the IO thread tried to lock a destroyed mutex.
We fix this by backporting patch for BUG#50364 which fixed this
bug in mysql server 5.5+. The patch deploys missing
synchronization when flush_master_info is called and the relay
log is flushed by the IO thread. In detail the patch backports
revision (from mysql-trunk):
- luis.soares@sun.com-20100203165617-b1yydr0ee24ycpjm
This patch already includes the post-push fix also in BUG#50364:
- luis.soares@sun.com-20100222002629-0cijwqk6baxhj7gr
Diffstat (limited to 'sql/rpl_rli.cc')
| -rw-r--r-- | sql/rpl_rli.cc | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sql/rpl_rli.cc b/sql/rpl_rli.cc index 1263b7c52d9..316e26f7e40 100644 --- a/sql/rpl_rli.cc +++ b/sql/rpl_rli.cc @@ -120,7 +120,7 @@ int init_relay_log_info(Relay_log_info* rli, /* The relay log will now be opened, as a SEQ_READ_APPEND IO_CACHE. Note that the I/O thread flushes it to disk after writing every - event, in flush_master_info(mi, 1). + event, in flush_master_info(mi, 1, ?). */ /* |