WAL Log rotation locks mutex

Author: ralph-hatoum

internal/wal/wal_forge.go

@@ -194,6 +194,9 @@ func (wl *walForge) rotateLogIfNeeded(entrySize uint32) error {
 // incrementing the current segment index, and opening a new segment file.
 func (wl *walForge) rotateLog() error {
 	fmt.Println("rotating log")
+	wl.mu.Lock()
+	defer wl.mu.Unlock()
+
 	// TODO: Ideally this function should not return any error
 	// Check for the conditions where it can return an error
 	// and handle them gracefully.