diff --git a/source/util/src/tlog.c b/source/util/src/tlog.c
index a03c04ed6e03531b3b78488c1d9dae40dbb9314d..e3714be594dd124344f82b2f5773f04bb68a2a19 100644
--- a/source/util/src/tlog.c
+++ b/source/util/src/tlog.c
@@ -586,7 +586,7 @@ static int32_t taosPushLogBuffer(SLogBuff *pLogBuf, const char *msg, int32_t msg
   int32_t        end = 0;
   int32_t        remainSize = 0;
   static int64_t lostLine = 0;
-  char           tmpBuf[40] = {0};
+  char           tmpBuf[128] = {0};
   int32_t        tmpBufLen = 0;
 
   if (pLogBuf == NULL || pLogBuf->stop) return -1;