Description:
Hi,
Falcon crashes while using sysbench for 8 and above number of threads. Below is the backtrace from log file.
080916 09:16:46 mysqld_safe Starting mysqld daemon with databases from /usr/local/mysql/var/
InnoDB: The first specified data file ./ibdata1 did not exist:
InnoDB: a new database to be created!
080916 9:16:47 InnoDB: Setting file ./ibdata1 size to 10 MB
InnoDB: Database physically writes the file full: wait...
080916 9:16:47 InnoDB: Log file ./ib_logfile0 did not exist: new to be created
InnoDB: Setting log file ./ib_logfile0 size to 5 MB
InnoDB: Database physically writes the file full: wait...
080916 9:16:47 InnoDB: Log file ./ib_logfile1 did not exist: new to be created
InnoDB: Setting log file ./ib_logfile1 size to 5 MB
InnoDB: Database physically writes the file full: wait...
InnoDB: Doublewrite buffer not found: creating new
InnoDB: Doublewrite buffer created
InnoDB: Creating foreign key constraint system tables
InnoDB: Foreign key constraint system tables created
080916 9:16:47 InnoDB: Started; log sequence number 0 0
080916 9:16:47 [Note] /usr/local/mysql/libexec/mysqld: ready for connections.
Version: '6.0.6-alpha' socket: '/tmp/mysql.sock' port: 3306 Source distribution
[Falcon] Error: assertion (transaction->transactionId == state->transactionId || transaction->state == Available) failed at line 779 in file Transaction.cpp
080916 9:16:56 - mysqld got signal 6 ;
This could be because you hit a bug. It is also possible that this binary
or one of the libraries it was linked against is corrupt, improperly built,
or misconfigured. This error can also be caused by malfunctioning hardware.
We will try our best to scrape up some info that will hopefully help diagnose
the problem, but since we have already crashed, something is definitely wrong
and this may fail.
key_buffer_size=402653184
read_buffer_size=8388608
max_used_connections=8
max_threads=2000
thread_count=8
connection_count=8
It is possible that mysqld could use up to
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 33182122 K
bytes of memory
Hope that's ok; if not, decrease some variables in the equation.
thd: 0x441a6c0
Attempting backtrace. You can use the following information to find out
where mysqld died. If you see no messages after this, something went
terribly wrong...
stack_bottom = 0x4b4d4100 thread_stack 0x40000
/usr/local/mysql/libexec/mysqld(my_print_stacktrace+0x24) [0x9a1494]
/usr/local/mysql/libexec/mysqld(handle_segfault+0x33b) [0x6049fb]
/lib64/libpthread.so.0 [0x3e2e20de60]
/lib64/libpthread.so.0(raise+0x2d) [0x3e2e20dd3d]
/usr/local/mysql/libexec/mysqld(Error::error(char const*, ...)+0x102) [0x81b612]
/usr/local/mysql/libexec/mysqld(Transaction::releaseDependencies()+0xc5) [0x7ec765]
/usr/local/mysql/libexec/mysqld(Transaction::commitNoUpdates()+0x123) [0x7ecc83]
/usr/local/mysql/libexec/mysqld(Transaction::commit()+0xb8) [0x7ed1b8]
/usr/local/mysql/libexec/mysqld(Connection::commit()+0x56) [0x802f36]
/usr/local/mysql/libexec/mysqld(StorageConnection::commit()+0x4b) [0x7cdf8b]
/usr/local/mysql/libexec/mysqld(StorageInterface::external_lock(THD*, int)+0x25e) [0x7ca97e]
/usr/local/mysql/libexec/mysqld(handler::ha_external_lock(THD*, int)+0x1a) [0x6f156a]
/usr/local/mysql/libexec/mysqld(mysql_unlock_tables(THD*, st_mysql_lock*)+0x64) [0x5fe944]
/usr/local/mysql/libexec/mysqld(select_send::send_eof()+0x75) [0x5f0b85]
/usr/local/mysql/libexec/mysqld [0x671871]
/usr/local/mysql/libexec/mysqld(JOIN::exec()+0x8e4) [0x686044]
/usr/local/mysql/libexec/mysqld(mysql_select(THD*, Item***, TABLE_LIST*, unsigned int, List<Item>&, Item*, unsigned int, st_order*, st_order*, Item*, st_order*, unsigned long long, select_result*, st_select_lex_unit*, st_select_lex*)+0x1b0) [0x687be0]
/usr/local/mysql/libexec/mysqld(handle_select(THD*, st_lex*, select_result*, unsigned long)+0x169) [0x6885b9]
/usr/local/mysql/libexec/mysqld [0x60fe49]
/usr/local/mysql/libexec/mysqld(mysql_execute_command(THD*)+0x1b01) [0x6149d1]
/usr/local/mysql/libexec/mysqld(Prepared_statement::execute(String*, bool)+0x398) [0x693208]
/usr/local/mysql/libexec/mysqld(Prepared_statement::execute_loop(String*, bool, unsigned char*, unsigned char*)+0x80) [0x6955e0]
/usr/local/mysql/libexec/mysqld(mysql_stmt_execute(THD*, char*, unsigned int)+0x19d) [0x69597d]
/usr/local/mysql/libexec/mysqld(dispatch_command(enum_server_command, THD*, char*, unsigned int)+0x498) [0x619f48]
/usr/local/mysql/libexec/mysqld(do_command(THD*)+0xc7) [0x61ae87]
/usr/local/mysql/libexec/mysqld(handle_one_connection+0xf4) [0x60cda4]
/lib64/libpthread.so.0 [0x3e2e2062e7]
/lib64/libc.so.6(clone+0x6d) [0x3e2d6ce3bd]
Trying to get some variables.
Some pointers may be invalid and cause the dump to abort...
thd->query at 0x4469748 = SELECT c from sbtest where id=?
thd->thread_id=6
thd->killed=NOT_KILLED
The manual page at http://dev.mysql.com/doc/mysql/en/crashing.html contains
information that should help you find out what is causing the crash.
080916 09:16:56 mysqld_safe Number of processes running now: 0
080916 09:16:56 mysqld_safe mysqld restarted
InnoDB: The log sequence number in ibdata files does not match
InnoDB: the log sequence number in the ib_logfiles!
080916 9:16:57 InnoDB: Database was not shut down normally!
InnoDB: Starting crash recovery.
InnoDB: Reading tablespace information from the .ibd files...
InnoDB: Restoring possible half-written data pages from the doublewrite
InnoDB: buffer...
080916 9:16:57 InnoDB: Started; log sequence number 0 46409
080916 9:16:57 [Note] /usr/local/mysql/libexec/mysqld: ready for connections.
.........
How to repeat:
sysbench test for 8 and above number of threads.
Include query_cache_type=0 in my.cnf
Suggested fix:
don't use query_cache_type=0, but you can assign a value to query_cache_size.(64M). However, this makes CPU utilization go very low and reduces the performance.
