ulonglong -> uint32 for log offset

more verbose messages when slave thread exits


sql/slave.cc:
  ulonglong -> uint32 for log offset
sql/slave.h:
  ulonglong -> uint32 for log offset

sql/slave.cc

@@ -588,7 +588,7 @@ int show_master_info(THD* thd)
   net_store_data(packet, (uint32) glob_mi.port);
   net_store_data(packet, (uint32) glob_mi.connect_retry);
   net_store_data(packet, glob_mi.log_file_name);
-  net_store_data(packet, (longlong) glob_mi.pos);
+  net_store_data(packet, (uint32) glob_mi.pos);
   pthread_mutex_unlock(&glob_mi.lock);
   pthread_mutex_lock(&LOCK_slave);
   net_store_data(packet, slave_running ? "Yes":"No");
@@ -1148,7 +1148,7 @@ pthread_handler_decl(handle_slave,arg __attribute__((unused)))
   
   int error = 1;
   bool retried_once = 0;
-  ulonglong last_failed_pos = 0;
+  uint32 last_failed_pos = 0;
   
   // needs to call my_thread_init(), otherwise we get a coredump in DBUG_ stuff
   my_thread_init();
@@ -1158,7 +1158,10 @@ pthread_handler_decl(handle_slave,arg __attribute__((unused)))
 
   pthread_detach_this_thread();
   if (init_slave_thread(thd) || init_master_info(&glob_mi))
-    goto err;
+    {
+      sql_print_error("Failed during slave thread initialization");
+      goto err;
+    }
   thd->thread_stack = (char*)&thd; // remember where our stack is
   thd->temporary_tables = save_temporary_tables; // restore temp tables
   threads.append(thd);
@@ -1185,7 +1188,10 @@ pthread_handler_decl(handle_slave,arg __attribute__((unused)))
 		  RPL_LOG_NAME,
 		  glob_mi.pos);
   else
-    goto err;
+    {
+      sql_print_error("Slave thread killed while connecting to master");
+      goto err;
+    }
   
   while (!slave_killed(thd))
   {
@@ -1194,7 +1200,11 @@ pthread_handler_decl(handle_slave,arg __attribute__((unused)))
 	{
 	  sql_print_error("Failed on request_dump()");
 	  if(slave_killed(thd))
-           goto err;
+	    {
+	      sql_print_error("Slave thread killed while requesting master \
+dump");
+              goto err;
+	    }
 	  
 	  thd->proc_info = "waiting to reconnect after a failed dump request";
 	  if(mysql->net.vio)
@@ -1208,14 +1218,21 @@ pthread_handler_decl(handle_slave,arg __attribute__((unused)))
 	    retried_once = 1;
 	  
 	  if(slave_killed(thd))
+	    {
+	      sql_print_error("Slave thread killed while retrying master \
+dump");
 	      goto err;
+	    }
 
 	  thd->proc_info = "reconnecting after a failed dump request";
           sql_print_error("Slave: failed dump request, reconnecting to \
 try again, log '%s' at postion %ld", RPL_LOG_NAME,
 			  last_failed_pos = glob_mi.pos );
 	  if(safe_reconnect(thd, mysql, &glob_mi) || slave_killed(thd))
+	    {
+	      sql_print_error("Slave thread killed during or after reconnect");
 	      goto err;
+	    }
 
 	  continue;
 	}
@@ -1226,7 +1243,10 @@ try again, log '%s' at postion %ld", RPL_LOG_NAME,
 	  thd->proc_info = "reading master update";
 	  uint event_len = read_event(mysql, &glob_mi);
 	  if(slave_killed(thd))
-	    goto err;
+	    {
+	      sql_print_error("Slave thread killed while reading event");
+	      goto err;
+	    }
 	  
 	  if (event_len == packet_error)
 	  {
@@ -1239,13 +1259,21 @@ try again, log '%s' at postion %ld", RPL_LOG_NAME,
 	      retried_once = 1; 
 	    
 	    if(slave_killed(thd))
-	      goto err;
+	      {
+		sql_print_error("Slave thread killed while waiting to \
+reconnect after a failed read");
+	        goto err;
+	      }
 	    thd->proc_info = "reconnecting after a failed read";
 	    sql_print_error("Slave: Failed reading log event, \
 reconnecting to retry, log '%s' position %ld", RPL_LOG_NAME,
 			    last_failed_pos = glob_mi.pos);
 	    if(safe_reconnect(thd, mysql, &glob_mi) || slave_killed(thd))
-	      goto err;
+	      {
+		sql_print_error("Slave thread killed during or after a \
+reconnect done to recover from failed read");
+	        goto err;
+	      }
 	    break;
 	  }
 	  

sql/slave.h

@@ -4,7 +4,7 @@
 typedef struct st_master_info
 {
   char log_file_name[FN_REFLEN];
-  ulonglong pos,pending;
+  uint32 pos,pending;
   File fd; // we keep the file open, so we need to remember the file pointer
   IO_CACHE file;
   // the variables below are needed because we can change masters on the fly
@@ -29,11 +29,11 @@ typedef struct st_master_info
     pthread_mutex_destroy(&lock);
     pthread_cond_destroy(&cond);
   }
-  inline void inc_pending(ulonglong val)
+  inline void inc_pending(uint32 val)
   {
     pending += val;
   }
-  inline void inc_pos(ulonglong val)
+  inline void inc_pos(uint32 val)
   {
     pthread_mutex_lock(&lock);
     pos += val + pending;
@@ -43,7 +43,7 @@ typedef struct st_master_info
   }
   // thread safe read of position - not needed if we are in the slave thread,
   // but required otherwise
-  inline void read_pos(ulonglong& var)
+  inline void read_pos(uint32& var)
   {
     pthread_mutex_lock(&lock);
     var = pos;