address comment

Signed-off-by: crazycs520 <[email protected]>

internal/client/client_batch.go

@@ -588,7 +588,7 @@ func (c *batchCommandsClient) send(forwardedHost string, req *tikvpb.BatchComman
 			zap.String("forwardedHost", forwardedHost),
 			zap.Error(err),
 		)
-		c.fastFailRequests(err, req.RequestIds)
+		c.failRequestsByIDs(err, req.RequestIds) // fast fail requests.
 		return
 	}
 
@@ -604,7 +604,7 @@ func (c *batchCommandsClient) send(forwardedHost string, req *tikvpb.BatchComman
 			zap.Uint64s("requestIDs", req.RequestIds),
 			zap.Error(err),
 		)
-		c.fastFailRequests(err, req.RequestIds)
+		c.failRequestsByIDs(err, req.RequestIds) // fast fail requests.
 	}
 }
 
@@ -631,8 +631,8 @@ func (c *batchCommandsClient) failPendingRequests(err error, forwardedHost strin
 	})
 }
 
-// fastFailRequests fast fails requests by requestID.
-func (c *batchCommandsClient) fastFailRequests(err error, requestIDs []uint64) {
+// failRequestsByIDs fails requests by requestID.
+func (c *batchCommandsClient) failRequestsByIDs(err error, requestIDs []uint64) {
 	for _, requestID := range requestIDs {
 		value, ok := c.batched.Load(requestID)
 		if !ok {