Docs/manual.texi

    added updated for FLUSH LOGS and replication
sql/log.cc
    fixed the log rotation bug when the log name did not change after
    FLUSH LOGS


Docs/manual.texi:
  added updated for FLUSH LOGS and replication
sql/log.cc:
  fixed the log rotation bug when the log name did not change after
  FLUSH LOGS
sql/sql_class.h:
  fixed the log rotation bug when the log name did not change after
  FLUSH LOGS

Docs/manual.texi

@@ -23935,8 +23935,13 @@ of the are available starting in 3.23.15 unless indicated otherwise.
 @code{log-bin} 
  @tab Should be set on the master. Tells it to keep a binary update log. 
 If a parameter is specified, the log will be written to the specified 
-location.
-(Set on @strong{Master}, Example: @code{log-bin})
+location. Note that if you give it a parameter with an extention 
+(eg. @code{log-bin=/mysql/logs/replication.log} ) versions up to 
+3.23.24 will not work right during replication if you do 
+@code{FLUSH LOGS} . The problem is fixed
+in 3.23.25. If you are using this kind of log name, @code{FLUSH LOGS}
+will be ignored on binlog. To clear the log, run @code{FLUSH MASTER},
+and do not forget to run @code{FLUSH SLAVE} on all slaves. 
 
 @item 
 @code{log-bin-index} 
@@ -36742,6 +36747,9 @@ though, so 3.23 is not released as a stable version yet.
 @appendixsubsec Changes in release 3.23.25
 @itemize @bullet
 @item
+@code{FLUSH LOGS} broke replication if one had @code{log-bin} with 
+a log with explicit extension 
+@item
 Fixed a bug in MyISAM with packed multi-part keys.
 @item
 Fixed crash when using @code{CHECK TABLE} on Windows.

sql/log.cc

@@ -77,7 +77,8 @@ static int find_uniq_filename(char *name)
 
 
 MYSQL_LOG::MYSQL_LOG(): file(0),index_file(0),last_time(0),query_start(0),
-			name(0), log_type(LOG_CLOSED),write_error(0),inited(0)
+			name(0), log_type(LOG_CLOSED),write_error(0),inited(0),
+			no_rotate(0)
 {
   /*
     We don't want to intialize LOCK_Log here as the thread system may
@@ -133,6 +134,8 @@ void MYSQL_LOG::open(const char *log_name, enum_log_type log_type_arg,
     inited=1;
     (void) pthread_mutex_init(&LOCK_log,NULL);
     (void) pthread_mutex_init(&LOCK_index, NULL);
+    if(log_type_arg == LOG_BIN && *fn_ext(log_name))
+      no_rotate = 1;
   }
 
   log_type=log_type_arg;
@@ -320,6 +323,9 @@ void MYSQL_LOG::new_file()
 {
   if (file)
   {
+    if(no_rotate) // do not rotate logs that are marked non-rotatable
+      return;     // ( for binlog with constant name)
+    
     char new_name[FN_REFLEN], *old_name=name;
     VOID(pthread_mutex_lock(&LOCK_log));
     if (generate_new_name(new_name, name))

sql/sql_class.h

@@ -85,6 +85,10 @@ class MYSQL_LOG {
   char time_buff[20],db[NAME_LEN+1];
   char log_file_name[FN_REFLEN],index_file_name[FN_REFLEN];
   bool write_error,inited;
+  bool no_rotate; // for binlog - if log name can never change
+  // we should not try to rotate it or write any rotation events
+  // the user should use FLUSH MASTER instead of FLUSH LOGS for
+  // purging
 
 public:
   MYSQL_LOG();