fix issue #280

src/system/src/vnodeImport.c

@@ -61,6 +61,7 @@ typedef struct {
   SData  *sdata[TSDB_MAX_COLUMNS];
   char   *buffer;
   char   *payload;
+  char   *opayload;  // allocated space for payload from client
   int     rows;
 } SImportInfo;
 
@@ -334,7 +335,7 @@ void vnodeProcessImportTimer(void *param, void *tmrId) {
   }
 
   pImport->signature = NULL;
-  free(pImport->payload);
+  free(pImport->opayload);
   free(pImport);
 }
 
@@ -923,6 +924,7 @@ int vnodeImportPoints(SMeterObj *pObj, char *cont, int contLen, char source, voi
       pNew->signature = pNew;
       int payloadLen = contLen - sizeof(SSubmitMsg);
       pNew->payload = malloc(payloadLen);
+      pNew->opayload = pNew->payload;
       memcpy(pNew->payload, payload, payloadLen);
 
       dTrace("vid:%d sid:%d id:%s, import later, commit in process:%d, numOfQueries:%d", pObj->vnode, pObj->sid,