Description:
I get deadlock when I run sysbench compex test for a mysql server which works with thread_pool.
Here is stack of all thread_pool threads when deadlock occurs:
#0 0x000000321d80a4b6 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1 0x00000000007f0385 in os_event_wait_low ()
#2 0x00000000008204b5 in srv_suspend_mysql_thread ()
#3 0x000000000080649a in row_mysql_handle_errors ()
#4 0x000000000081405e in row_search_for_mysql ()
#5 0x0000000000786f70 in ha_innobase::index_read ()
#6 0x00000000006a82ce in handler::read_range_first ()
#7 0x00000000006a4d3e in handler::multi_range_read_next ()
#8 0x000000000068e1f3 in QUICK_RANGE_SELECT::get_next ()
#9 0x00000000006a180d in rr_quick ()
#10 0x000000000064f7ed in mysql_update ()
#11 0x00000000005cb2b5 in mysql_execute_command ()
#12 0x0000000000646d18 in Prepared_statement::execute ()
#13 0x00000000006490f0 in Prepared_statement::execute_loop ()
#14 0x000000000064948d in mysql_stmt_execute ()
#15 0x00000000005cd9c8 in dispatch_command ()
#16 0x00000000005ce907 in do_command ()
#17 0x00000000005c177c in libevent_thread_proc ()
#18 0x000000321d806307 in start_thread () from /lib64/libpthread.so.0
#19 0x000000321d0d1ded in clone () from /lib64/libc.so.6
How to repeat:
- mysql version: mysql-6.0.6-alpha.tar.gz
- configure params: --with-innodb --with-libevent
- install mysql (make install, mysql_install_db)
- install sysbench (it is needed libs and headers for mysql-5.1)
- run mysqld with params: "--thread_handling=pool-of-threads --thread_pool_size=2" (here can be 1 or 4 threads - deadlock anyway).
- run this sysbench test:
> sysbench=sysbench; #path to sysbench executable
> mysql_user=mysql; #client user
> sb_prefix="$sysbench --test=oltp --oltp-test-mode=complex --mysql-user=$mysql_user --mysql-db=test --mysql-table-engine=innodb --oltp-table-size=30 --num-threads=128";
> $sb_prefix prepare; #ok
> $sb_prefix run; #deadlock!
> $sb_prefix cleanup; #unreachable
My Hardware/OS information:
1. 8-core server with 16G memory, Linux CentOS 5.2 x86_64.
2. 2-core desktop with 4G memory, Linux CentOS 5.2 x86_64.
