Bug#21781 Replication slave io thread hangs

 - Add test case that shows how slave server hangs in "STOP SLAVE"
   when run on MySQL version 5.0.33 compiled with OpenSSL.
   Works fine with latest version of MySQL since that problem
   has been fixed by patch for bug#24148. The fix has been noted in
   the changelog for MySQL 5.0.36

mysql-test/r/rpl_ssl.result

+stop slave;
+drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9;
+reset master;
+reset slave;
+drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9;
+start slave;
+grant replication slave on *.* to replssl@localhost require ssl;
+create table t1 (t int auto_increment, KEY(t));
+stop slave;
+change master to
+master_user='replssl',
+master_password='',
+master_ssl=1,
+master_ssl_ca ='MYSQL_TEST_DIR/std_data/cacert.pem',
+master_ssl_cert='MYSQL_TEST_DIR/std_data/client-cert.pem',
+master_ssl_key='MYSQL_TEST_DIR/std_data/client-key.pem';
+start slave;
+insert into t1 values(1);
+select * from t1;
+t
+1
+show slave status;
+Slave_IO_State	#
+Master_Host	127.0.0.1
+Master_User	replssl
+Master_Port	MASTER_MYPORT
+Connect_Retry	1
+Master_Log_File	master-bin.000001
+Read_Master_Log_Pos	420
+Relay_Log_File	#
+Relay_Log_Pos	#
+Relay_Master_Log_File	master-bin.000001
+Slave_IO_Running	Yes
+Slave_SQL_Running	Yes
+Replicate_Do_DB	
+Replicate_Ignore_DB	
+Replicate_Do_Table	
+Replicate_Ignore_Table	
+Replicate_Wild_Do_Table	
+Replicate_Wild_Ignore_Table	
+Last_Errno	0
+Last_Error	
+Skip_Counter	0
+Exec_Master_Log_Pos	420
+Relay_Log_Space	#
+Until_Condition	None
+Until_Log_File	
+Until_Log_Pos	0
+Master_SSL_Allowed	Yes
+Master_SSL_CA_File	MYSQL_TEST_DIR/std_data/cacert.pem
+Master_SSL_CA_Path	
+Master_SSL_Cert	MYSQL_TEST_DIR/std_data/client-cert.pem
+Master_SSL_Cipher	
+Master_SSL_Key	MYSQL_TEST_DIR/std_data/client-key.pem
+Seconds_Behind_Master	#
+STOP SLAVE;
+select * from t1;
+t
+1
+show slave status;
+Slave_IO_State	#
+Master_Host	127.0.0.1
+Master_User	replssl
+Master_Port	MASTER_MYPORT
+Connect_Retry	1
+Master_Log_File	master-bin.000001
+Read_Master_Log_Pos	12320
+Relay_Log_File	#
+Relay_Log_Pos	#
+Relay_Master_Log_File	master-bin.000001
+Slave_IO_Running	Yes
+Slave_SQL_Running	Yes
+Replicate_Do_DB	
+Replicate_Ignore_DB	
+Replicate_Do_Table	
+Replicate_Ignore_Table	
+Replicate_Wild_Do_Table	
+Replicate_Wild_Ignore_Table	
+Last_Errno	0
+Last_Error	
+Skip_Counter	0
+Exec_Master_Log_Pos	12320
+Relay_Log_Space	#
+Until_Condition	None
+Until_Log_File	
+Until_Log_Pos	0
+Master_SSL_Allowed	Yes
+Master_SSL_CA_File	MYSQL_TEST_DIR/std_data/cacert.pem
+Master_SSL_CA_Path	
+Master_SSL_Cert	MYSQL_TEST_DIR/std_data/client-cert.pem
+Master_SSL_Cipher	
+Master_SSL_Key	MYSQL_TEST_DIR/std_data/client-key.pem
+Seconds_Behind_Master	#

mysql-test/t/rpl_ssl.test

+source include/have_ssl.inc;
+source include/master-slave.inc;
+
+# create a user for replication that requires ssl encryption
+connection master;
+grant replication slave on *.* to replssl@localhost require ssl;
+create table t1 (t int auto_increment, KEY(t));
+
+sync_slave_with_master;
+
+# Set slave to use SSL for connection to master
+stop slave;
+--replace_result $MYSQL_TEST_DIR MYSQL_TEST_DIR
+eval change master to
+  master_user='replssl',
+  master_password='',
+  master_ssl=1,
+  master_ssl_ca ='$MYSQL_TEST_DIR/std_data/cacert.pem',
+  master_ssl_cert='$MYSQL_TEST_DIR/std_data/client-cert.pem',
+  master_ssl_key='$MYSQL_TEST_DIR/std_data/client-key.pem';
+start slave;
+
+# Switch to master and insert one record, then sync it to slave
+connection master;
+insert into t1 values(1);
+sync_slave_with_master;
+
+# The record should now be on slave
+select * from t1;
+
+# The slave is synced and waiting/reading from master
+# SHOW SLAVE STATUS will show "Waiting for master to send event"
+--replace_result $MYSQL_TEST_DIR MYSQL_TEST_DIR $MASTER_MYPORT MASTER_MYPORT
+--replace_column 1 # 8 # 9 # 23 # 33 #
+query_vertical show slave status;
+
+# Stop the slave, as reported in bug#21871 it would hang
+STOP SLAVE;
+
+select * from t1;
+
+# Do the same thing a number of times
+disable_query_log;
+let $i= 100;
+while ($i)
+{
+  start slave;
+  connection master;
+  insert into t1 values (NULL);
+  connection slave;
+  stop slave;
+  dec $i;
+}
+start slave;
+enable_query_log;
+connection master;
+sync_slave_with_master;
+--replace_result $MYSQL_TEST_DIR MYSQL_TEST_DIR $MASTER_MYPORT MASTER_MYPORT
+--replace_column 1 # 8 # 9 # 23 # 33 #
+query_vertical show slave status;