From 61da9bbe84ec017a8c2768e06add74713d02594c Mon Sep 17 00:00:00 2001
From: Shengliang Guan <slguan@taosdata.com>
Date: Fri, 14 May 2021 15:18:05 +0800
Subject: [PATCH] TD-4100

---
 src/rpc/src/rpcMain.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/rpc/src/rpcMain.c b/src/rpc/src/rpcMain.c
index 2ec508f050..75312a0b03 100644
--- a/src/rpc/src/rpcMain.c
+++ b/src/rpc/src/rpcMain.c
@@ -1471,7 +1471,7 @@ static int32_t rpcCompressRpcMsg(char* pCont, int32_t contLen) {
    * only the compressed size is less than the value of contLen - overhead, the compression is applied
    * The first four bytes is set to 0, the second four bytes are utilized to keep the original length of message
    */
-  if (compLen < contLen - overhead) {
+  if (compLen > 0 && compLen < contLen - overhead) {
     SRpcComp *pComp = (SRpcComp *)pCont;
     pComp->reserved = 0; 
     pComp->contLen = htonl(contLen); 
-- 
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