Manual merge

mysql-test/include/restart_slave_sql.inc

+# ==== Purpose ====
+#
+# Provide a earier way to restart SQL thread when you want to stop sql thread
+# and then start it immediately.
+#
+# Sources stop_slave_sql.inc to stop SQL thread on the current connection.
+# Then issues START SLAVE SQL_THREAD and then waits until
+# the SQL threads have started, or until a timeout is reached.
+#
+# Please use this instead of 'STOP|START SLAVE SQL_THREAD', to reduce the risk of
+# test case bugs.
+#
+#
+# ==== Usage ====
+#
+# [--let $slave_timeout= NUMBER]
+# [--let $rpl_debug= 1]
+# --source include/restart_slave_sql.inc
+#
+# Parameters:
+#   $slave_timeout
+#     See include/wait_for_slave_param.inc
+#
+#   $rpl_debug
+#     See include/rpl_init.inc
+
+
+--let $include_filename= restart_slave.inc
+--source include/begin_include_file.inc
+
+
+if (!$rpl_debug)
+{
+  --disable_query_log
+}
+
+source include/stop_slave_sql.inc;
+START SLAVE SQL_THREAD;
+source include/wait_for_slave_sql_to_start.inc;
+
+
+--let $include_filename= restart_slave.inc
+--source include/end_include_file.inc
\ No newline at end of file

mysql-test/include/rpl_connection_master.inc

+let $rpl_connection_name= master;
+source include/rpl_connection.inc;
\ No newline at end of file

mysql-test/include/rpl_connection_slave.inc

+let $rpl_connection_name= slave;
+source include/rpl_connection.inc;
\ No newline at end of file

mysql-test/include/rpl_connection_slave1.inc

+let $rpl_connection_name= slave1;
+source include/rpl_connection.inc;
\ No newline at end of file

mysql-test/suite/rpl/r/rpl_stop_slave.result

@@ -74,5 +74,47 @@ include/wait_for_slave_sql_to_start.inc
 
 # Test end
 SET GLOBAL debug= '$debug_save';
+include/restart_slave.inc
+[connection master]
+DROP TABLE t1, t2;
+
+# Bug#58546 test rpl_packet timeout failure sporadically on PB
+# ----------------------------------------------------------------------
+# STOP SLAVE stopped IO thread first and then stopped SQL thread. It was
+# possible that IO thread stopped after replicating part of a transaction
+# which SQL thread was executing. SQL thread would be hung if the
+# transaction could not be rolled back safely.
+# It caused some sporadic failures on PB2.
+#
+# This test verifies that when 'STOP SLAVE' is issued by a user, IO
+# thread will continue to fetch the rest events of the transaction which
+# is being executed by SQL thread and is not able to be rolled back safely.
+CREATE TABLE t1 (c1 INT KEY, c2 INT) ENGINE=InnoDB;
+CREATE TABLE t2 (c1 INT) ENGINE=MyISAM;
+INSERT INTO t1 VALUES(1, 1);
+SET GLOBAL debug= 'd,dump_thread_wait_before_send_xid';
+[connection slave]
+include/restart_slave.inc
+BEGIN;
+UPDATE t1 SET c2 = 2 WHERE c1 = 1;
+[connection master]
+BEGIN;
+INSERT INTO t1 VALUES(2, 2);
+INSERT INTO t2 VALUES(1);
+UPDATE t1 SET c2 = 3 WHERE c1 = 1;
+COMMIT;
+[connection slave1]
+STOP SLAVE;
+[connection slave]
+ROLLBACK;
+[connection master]
+SET DEBUG_SYNC= 'now SIGNAL signal.continue';
+SET DEBUG_SYNC= 'RESET';
+[connection slave]
+include/wait_for_slave_to_stop.inc
+[connection slave1]
+include/start_slave.inc
+[connection master]
 DROP TABLE t1, t2;
+SET GLOBAL debug= $debug_save;
 include/rpl_end.inc

mysql-test/suite/rpl/t/rpl_packet.test

@@ -26,8 +26,8 @@ let $old_net_buffer_length= `SELECT @@global.net_buffer_length`;
 SET @@global.max_allowed_packet=1024;
 SET @@global.net_buffer_length=1024;
 
+sync_slave_with_master;
 # Restart slave for setting to take effect
-connection slave;
 source include/stop_slave.inc;
 source include/start_slave.inc;
 

mysql-test/suite/rpl/t/rpl_stop_slave.test

@@ -45,7 +45,69 @@ source extra/rpl_tests/rpl_stop_slave.test;
 --echo
 --echo # Test end
 SET GLOBAL debug= '$debug_save';
+source include/restart_slave_sql.inc;
 
-connection master;
+--source include/rpl_connection_master.inc
 DROP TABLE t1, t2;
+
+--echo
+--echo # Bug#58546 test rpl_packet timeout failure sporadically on PB
+--echo # ----------------------------------------------------------------------
+--echo # STOP SLAVE stopped IO thread first and then stopped SQL thread. It was
+--echo # possible that IO thread stopped after replicating part of a transaction
+--echo # which SQL thread was executing. SQL thread would be hung if the
+--echo # transaction could not be rolled back safely.
+--echo # It caused some sporadic failures on PB2.
+--echo #
+--echo # This test verifies that when 'STOP SLAVE' is issued by a user, IO
+--echo # thread will continue to fetch the rest events of the transaction which
+--echo # is being executed by SQL thread and is not able to be rolled back safely.
+
+CREATE TABLE t1 (c1 INT KEY, c2 INT) ENGINE=InnoDB;
+CREATE TABLE t2 (c1 INT) ENGINE=MyISAM;
+INSERT INTO t1 VALUES(1, 1);
+
+let $debug_save= `SELECT @@GLOBAL.debug`;
+SET GLOBAL debug= 'd,dump_thread_wait_before_send_xid';
+
+sync_slave_with_master;
+
+--source include/rpl_connection_slave.inc
+source include/restart_slave_sql.inc;
+
+BEGIN;
+UPDATE t1 SET c2 = 2 WHERE c1 = 1;
+
+--source include/rpl_connection_master.inc
+BEGIN;
+INSERT INTO t1 VALUES(2, 2);
+INSERT INTO t2 VALUES(1);
+UPDATE t1 SET c2 = 3 WHERE c1 = 1;
+COMMIT;
+
+--source include/rpl_connection_slave1.inc
+let $show_statement= SHOW PROCESSLIST;
+let $field= Info;
+let $condition= = 'UPDATE t1 SET c2 = 3 WHERE c1 = 1';
+source include/wait_show_condition.inc;
+
+send STOP SLAVE;
+
+--source include/rpl_connection_slave.inc
+ROLLBACK;
+
+--source include/rpl_connection_master.inc
+SET DEBUG_SYNC= 'now SIGNAL signal.continue';
+SET DEBUG_SYNC= 'RESET';
+
+--source include/rpl_connection_slave.inc
+source include/wait_for_slave_to_stop.inc;
+
+--source include/rpl_connection_slave1.inc
+reap;
+source include/start_slave.inc;
+
+--source include/rpl_connection_master.inc
+DROP TABLE t1, t2;
+SET GLOBAL debug= $debug_save;
 --source include/rpl_end.inc

sql/slave.cc

@@ -504,6 +504,30 @@ int terminate_slave_threads(Master_info* mi,int thread_mask,bool skip_lock)
   mysql_mutex_t *sql_lock = &mi->rli.run_lock, *io_lock = &mi->run_lock;
   mysql_mutex_t *log_lock= mi->rli.relay_log.get_log_lock();
 
+  if (thread_mask & (SLAVE_SQL|SLAVE_FORCE_ALL))
+  {
+    DBUG_PRINT("info",("Terminating SQL thread"));
+    mi->rli.abort_slave=1;
+    if ((error=terminate_slave_thread(mi->rli.sql_thd, sql_lock,
+                                      &mi->rli.stop_cond,
+                                      &mi->rli.slave_running,
+                                      skip_lock)) &&
+        !force_all)
+      DBUG_RETURN(error);
+
+    mysql_mutex_lock(log_lock);
+
+    DBUG_PRINT("info",("Flushing relay-log info file."));
+    if (current_thd)
+      thd_proc_info(current_thd, "Flushing relay-log info file.");
+    if (flush_relay_log_info(&mi->rli))
+      DBUG_RETURN(ER_ERROR_DURING_FLUSH_LOGS);
+    
+    if (my_sync(mi->rli.info_fd, MYF(MY_WME)))
+      DBUG_RETURN(ER_ERROR_DURING_FLUSH_LOGS);
+
+    mysql_mutex_unlock(log_lock);
+  }
   if (thread_mask & (SLAVE_IO|SLAVE_FORCE_ALL))
   {
     DBUG_PRINT("info",("Terminating IO thread"));
@@ -532,30 +556,6 @@ int terminate_slave_threads(Master_info* mi,int thread_mask,bool skip_lock)
 
     mysql_mutex_unlock(log_lock);
   }
-  if (thread_mask & (SLAVE_SQL|SLAVE_FORCE_ALL))
-  {
-    DBUG_PRINT("info",("Terminating SQL thread"));
-    mi->rli.abort_slave=1;
-    if ((error=terminate_slave_thread(mi->rli.sql_thd, sql_lock,
-                                      &mi->rli.stop_cond,
-                                      &mi->rli.slave_running,
-                                      skip_lock)) &&
-        !force_all)
-      DBUG_RETURN(error);
-
-    mysql_mutex_lock(log_lock);
-
-    DBUG_PRINT("info",("Flushing relay-log info file."));
-    if (current_thd)
-      thd_proc_info(current_thd, "Flushing relay-log info file.");
-    if (flush_relay_log_info(&mi->rli))
-      DBUG_RETURN(ER_ERROR_DURING_FLUSH_LOGS);
-    
-    if (my_sync(mi->rli.info_fd, MYF(MY_WME)))
-      DBUG_RETURN(ER_ERROR_DURING_FLUSH_LOGS);
-
-    mysql_mutex_unlock(log_lock);
-  }
   DBUG_RETURN(0); 
 }
 

sql/sql_repl.cc

@@ -25,6 +25,7 @@
 #include "rpl_filter.h"
 #include <my_dir.h>
 #include "rpl_handler.h"
+#include "debug_sync.h"
 
 int max_binlog_dump_events = 0; // unlimited
 my_bool opt_sporadic_binlog_dump_fail = 0;
@@ -693,6 +694,19 @@ impossible position";
         coord->pos= uint4korr(packet->ptr() + ev_offset + LOG_POS_OFFSET);
 
       event_type= (Log_event_type)((*packet)[LOG_EVENT_OFFSET+ev_offset]);
+      DBUG_EXECUTE_IF("dump_thread_wait_before_send_xid",
+                      {
+                        if (event_type == XID_EVENT)
+                        {
+                          net_flush(net);
+                          const char act[]=
+                            "now "
+                            "wait_for signal.continue";
+                          DBUG_ASSERT(opt_debug_sync_timeout > 0);
+                          DBUG_ASSERT(!debug_sync_set_action(current_thd,
+                                                             STRING_WITH_LEN(act)));
+                        }
+                      });
       if (event_type == FORMAT_DESCRIPTION_EVENT)
       {
         binlog_can_be_corrupted= test((*packet)[FLAGS_OFFSET+ev_offset] &
@@ -718,6 +732,14 @@ impossible position";
 	goto err;
       }
 
+      DBUG_EXECUTE_IF("dump_thread_wait_before_send_xid",
+                      {
+                        if (event_type == XID_EVENT)
+                        {
+                          net_flush(net);
+                        }
+                      });
+
       DBUG_PRINT("info", ("log event code %d", event_type));
       if (event_type == LOAD_EVENT)
       {