fix(canal): restore saving position on fake rotate event

Author: mefcorvi

canal/sync.go

@@ -50,11 +50,7 @@ func (c *Canal) runSyncBinlog() error {
 
 		// Update the delay between the Canal and the Master before the handler hooks are called
 		c.updateReplicationDelay(ev)
-		// if log pos equal zero ,it is a fake rotate event,ignore it.
-		// see https://github.com/mysql/mysql-server/blob/8cc757da3d87bf4a1f07dcfb2d3c96fed3806870/sql/rpl_binlog_sender.cc#L899
-		if ev.Header.LogPos == 0 {
-			continue
-		}
+
 		savePos = false
 		force = false
 		pos := c.master.Position()