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# # Bug #19386426 SHUTDOWN HANGS: CLIENT THREAD IN A LOOP # AROUND SRV_CONC_ENTER_INNODB() # SET @old_innodb_thread_concurrency := @@innodb_thread_concurrency; SET @old_innodb_thread_sleep_delay := @@innodb_thread_sleep_delay; SET GLOBAL innodb_thread_concurrency = 1; create table t1(f1 int) engine=innodb; SET DEBUG_SYNC= 'ib_after_row_insert SIGNAL opened WAIT_FOR flushed'; insert into t1 values(12); connection default; SET DEBUG_SYNC= 'now WAIT_FOR opened'; SET DEBUG_SYNC= 'user_thread_waiting SIGNAL flushed WAIT_FOR opened1'; insert into t1 values(13); set global innodb_thread_concurrency=0; SET DEBUG_SYNC= 'now SIGNAL opened1'; select * from t1; f1 12 13 drop table t1; SET GLOBAL innodb_thread_concurrency = @old_innodb_thread_concurrency; SET GLOBAL innodb_thread_sleep_delay = @old_innodb_thread_sleep_delay;