From c90ea8014303be94d5ba775bf7bec16f6db9013d Mon Sep 17 00:00:00 2001
From: Bomin Zhang <bmzhang@taosdata.com>
Date: Tue, 8 Dec 2020 02:55:20 +0000
Subject: [PATCH] [TD-2373]<fix>: data race in removeFromWheel

---
 src/util/src/ttimer.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/util/src/ttimer.c b/src/util/src/ttimer.c
index 0222a6d80a..4eafbd1ae9 100644
--- a/src/util/src/ttimer.c
+++ b/src/util/src/ttimer.c
@@ -225,10 +225,11 @@ static void addToWheel(tmr_obj_t* timer, uint32_t delay) {
 }
 
 static bool removeFromWheel(tmr_obj_t* timer) {
-  if (timer->wheel >= tListLen(wheels)) {
+  uint8_t wheelIdx = timer->wheel;
+  if (wheelIdx >= tListLen(wheels)) {
     return false;
   }
-  time_wheel_t* wheel = wheels + timer->wheel;
+  time_wheel_t* wheel = wheels + wheelIdx;
 
   bool removed = false;
   pthread_mutex_lock(&wheel->mutex);
-- 
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