diff --git a/src/dnode/src/dnodeModule.c b/src/dnode/src/dnodeModule.c
index 0a5b9b550cab09a4bdd5abb25c28aa5c202d8f90..18a293d41588033a27c4f1bf88e3af0d1d527eec 100644
--- a/src/dnode/src/dnodeModule.c
+++ b/src/dnode/src/dnodeModule.c
@@ -147,13 +147,13 @@ void dnodeProcessModuleStatus(uint32_t moduleStatus) {
 }
 
 bool dnodeCheckMnodeStarting() {
-  if (tsModuleStatus & TSDB_MOD_MNODE) return false;
+  if (tsModuleStatus & (1 << TSDB_MOD_MNODE)) return false;
 
   SDMMnodeInfos *mnodes = dnodeGetMnodeInfos();
   for (int32_t i = 0; i < mnodes->nodeNum; ++i) {
     SDMMnodeInfo *node = &mnodes->nodeInfos[i];
     if (node->nodeId == dnodeGetDnodeId()) {
-      uint32_t moduleStatus = tsModuleStatus | (1 << TSDB_MOD_MNODE);;
+      uint32_t moduleStatus = tsModuleStatus | (1 << TSDB_MOD_MNODE);
       dInfo("start mnode module, module status:%d, new status:%d", tsModuleStatus, moduleStatus);
       dnodeProcessModuleStatus(moduleStatus);
       return true;
diff --git a/src/mnode/src/mnodeTable.c b/src/mnode/src/mnodeTable.c
index 43b80f65c8808bab8f8f452148b1e16d957ef9f9..1bc328800e1924879d5af18ab4f6c876238e0ae0 100644
--- a/src/mnode/src/mnodeTable.c
+++ b/src/mnode/src/mnodeTable.c
@@ -2093,11 +2093,11 @@ static int32_t mnodeDoGetChildTableMeta(SMnodeMsg *pMsg, STableMetaMsg *pMeta) {
   pMeta->precision = pDb->cfg.precision;
   pMeta->tableType = pTable->info.type;
   tstrncpy(pMeta->tableId, pTable->info.tableId, TSDB_TABLE_FNAME_LEN);
-  if (pTable->superTable) {
+  if (pTable->superTable != NULL) {
     tstrncpy(pMeta->sTableId, pTable->superTable->info.tableId, TSDB_TABLE_FNAME_LEN);
   }
 
-  if (pTable->info.type == TSDB_CHILD_TABLE) {
+  if (pTable->info.type == TSDB_CHILD_TABLE && pTable->superTable != NULL) {
     pMeta->sversion     = htons(pTable->superTable->sversion);
     pMeta->tversion     = htons(pTable->superTable->tversion);
     pMeta->numOfTags    = (int8_t)pTable->superTable->numOfTags;
diff --git a/src/os/src/detail/osDir.c b/src/os/src/detail/osDir.c
index 30fd05ffc7c040d4abf5bf3a0a9b6dcf28eb3ebb..d3f0fda1a5c8535226eedbac6d5d88a1352e3c6e 100644
--- a/src/os/src/detail/osDir.c
+++ b/src/os/src/detail/osDir.c
@@ -126,12 +126,13 @@ int32_t taosCompressFile(char *srcFileName, char *destFileName) {
   dstFp = gzdopen(fd, "wb6f");
   if (dstFp == NULL) {
     ret = -3;
+    close(fd);
     goto cmp_end;
   }
 
   while (!feof(srcFp)) {
     len = (int32_t)fread(data, 1, COMPRESS_STEP_SIZE, srcFp);
-    gzwrite(dstFp, data, len);
+    (void)gzwrite(dstFp, data, len);
   }
 
 cmp_end:
diff --git a/src/plugins/http/src/httpParser.c b/src/plugins/http/src/httpParser.c
index 0c3204687a3fa92fb71d8da2551bb4c10a7a4097..b84483453736aac7693c9ec671ec5a27c4178072 100644
--- a/src/plugins/http/src/httpParser.c
+++ b/src/plugins/http/src/httpParser.c
@@ -153,10 +153,10 @@ static int32_t httpOnRequestLine(HttpParser *pParser, char *method, char *target
   for (int32_t i = 0; i < HTTP_MAX_URL; i++) {
     char *pSeek = strchr(pStart, '/');
     if (pSeek == NULL) {
-      httpAppendString(pParser->path + i, pStart, strlen(pStart));
+      (void)httpAppendString(pParser->path + i, pStart, strlen(pStart));
       break;
     } else {
-      httpAppendString(pParser->path + i, pStart, (int32_t)(pSeek - pStart));
+      (void)httpAppendString(pParser->path + i, pStart, (int32_t)(pSeek - pStart));
     }
     pStart = pSeek + 1;
   }
@@ -485,11 +485,11 @@ void httpClearParser(HttpParser *parser) {
 }
 
 void httpDestroyParser(HttpParser *parser) {
+  if (!parser) return;
+
   HttpContext *pContext = parser->pContext;
   httpTrace("context:%p, fd:%d, destroy parser", pContext, pContext->fd);
 
-  if (!parser) return;
-
   free(parser->method);         parser->method          = NULL;
   free(parser->target);         parser->target          = NULL;
   free(parser->version);        parser->version         = NULL;
@@ -684,23 +684,28 @@ static int32_t httpParserOnVersion(HttpParser *parser, HTTP_PARSER_STATE state,
       break;
     }
 
-    if (c!='0' && c!='1') {
+    if (c != '0' && c != '1' && c != '2') {
       httpError("context:%p, fd:%d, parser state:%d, unexpected char:[%c]%02x", pContext, pContext->fd, state, c, c);
       ok = -1;
       httpOnError(parser, 400, TSDB_CODE_HTTP_PARSE_VERSION_FAILED);
       break;
     }
+
     if (httpAppendString(&parser->str, &c, 1)) {
       httpError("context:%p, fd:%d, parser state:%d, char:[%c]%02x, oom", pContext, pContext->fd, state, c, c);
       ok = -1;
       httpOnError(parser, 507, TSDB_CODE_HTTP_PARSE_VERSION_FAILED);
       break;
     }
-    
-    if (c == '0') parser->httpVersion = HTTP_VERSION_10;
-    else if (c == '1') parser->httpVersion = HTTP_VERSION_11;
-    else if (c == '2') parser->httpVersion = HTTP_VERSION_12;
-    else parser->httpVersion = HTTP_INVALID_VERSION;
+
+    if (c == '0')
+      parser->httpVersion = HTTP_VERSION_10;
+    else if (c == '1')
+      parser->httpVersion = HTTP_VERSION_11;
+    else if (c == '2')
+      parser->httpVersion = HTTP_VERSION_12;
+    else {
+    }
 
     parser->version = strdup(parser->str.str);
     if (!parser->version) {