Merge from mysql-5.0-bugteam.

mysql-test/collections/default.experimental

@@ -2,12 +2,5 @@ funcs_1.charset_collation_1              # depends on compile-time decisions
 binlog.binlog_tmp_table                  # Bug#45578: Test binlog_tmp_table fails ramdonly on PB2: Unknown table 't2'
 main.ctype_gbk_binlog                    # Bug#46010: main.ctype_gbk_binlog fails sporadically : Table 't2' already exists
 rpl.rpl_row_create_table                 # Bug#45576: rpl_row_create_table fails on PB2
-rpl.rpl_extraColmaster_myisam            # Bug#46013: rpl_extraColmaster_myisam fails on pb2
-rpl.rpl_stm_reset_slave                  # Bug#46014: rpl_stm_reset_slave crashes the server sporadically in pb2
-rpl.rpl_extraCol_myisam                  # Bug#40796
-rpl.rpl_extraColmaster_innodb            # Bug#40796
-rpl.rpl_extraCol_innodb                  # Bug#40796
 rpl_ndb.rpl_ndb_log                      # Bug#38998
 rpl.rpl_innodb_bug28430                  # Bug#46029
-rpl.rpl_row_basic_3innodb                # Bug#45243
-rpl.rpl_truncate_3innodb                 # Bug#46030

server-tools/instance-manager/mysql_connection.cc

@@ -70,6 +70,18 @@ void my_net_local_init(NET *net)
 
 C_MODE_END
 
+/*
+  Unused stub hook required for linking the client API.
+*/
+
+C_MODE_START
+
+void slave_io_thread_detach_vio()
+{
+}
+
+C_MODE_END
+
 
 /*
   Every resource, which we can fail to acquire, is allocated in init().

sql-common/client.c

@@ -933,6 +933,9 @@ void end_server(MYSQL *mysql)
   {
     init_sigpipe_variables
     DBUG_PRINT("info",("Net: %s", vio_description(mysql->net.vio)));
+#ifdef MYSQL_SERVER
+    slave_io_thread_detach_vio();
+#endif
     set_sigpipe(mysql);
     vio_delete(mysql->net.vio);
     reset_sigpipe(mysql);

sql/client_settings.h

@@ -33,3 +33,11 @@
 
 #define mysql_server_init(a,b,c) 0
 
+#ifdef HAVE_REPLICATION
+C_MODE_START
+void slave_io_thread_detach_vio();
+C_MODE_END
+#else
+#define slave_io_thread_detach_vio()
+#endif
+

sql/slave.cc

@@ -3738,6 +3738,31 @@ void end_relay_log_info(Relay_log_info* rli)
   DBUG_VOID_RETURN;
 }
 
+
+/**
+  Hook to detach the active VIO before closing a connection handle.
+
+  The client API might close the connection (and associated data)
+  in case it encounters a unrecoverable (network) error. This hook
+  is called from the client code before the VIO handle is deleted
+  allows the thread to detach the active vio so it does not point
+  to freed memory.
+
+  Other calls to THD::clear_active_vio throughout this module are
+  redundant due to the hook but are left in place for illustrative
+  purposes.
+*/
+
+extern "C" void slave_io_thread_detach_vio()
+{
+#ifdef SIGNAL_WITH_VIO_CLOSE
+  THD *thd= current_thd;
+  if (thd->slave_thread)
+    thd->clear_active_vio();
+#endif
+}
+
+
 /*
   Try to connect until successful or slave killed