diff --git a/pwrapic/src/pwrproc.c b/pwrapic/src/pwrproc.c
index 6c38312b0035c091d8e2e551f972c55bee644151..a3b92cf6c888559326d764874d6ab96b25dfed6c 100644
--- a/pwrapic/src/pwrproc.c
+++ b/pwrapic/src/pwrproc.c
@@ -35,6 +35,7 @@ int QueryProcsByKeywords(const char *keywords, pid_t procs[], uint32_t *num)
     *num = (uint32_t)(size / sizeof(pid_t));
     if (ret != PWR_SUCCESS) {
         PwrLog(ERROR, "QueryProcsByKeywords failed. ret:%d", ret);
+        *num = 0;
     } else {
         PwrLog(DEBUG, "QueryProcsByKeywords succeed.");
     }
diff --git a/pwrapis/src/procservice.c b/pwrapis/src/procservice.c
index 627c3787046ed14cf707039e8a2efd410bf868d1..ba066328a3152395c70bd1d7e21d9e15b2368b10 100644
--- a/pwrapis/src/procservice.c
+++ b/pwrapis/src/procservice.c
@@ -422,7 +422,7 @@ static int WriteSmartGridGov(PWR_PROC_SmartGridGov *sgGov)
 void ProcQueryProcs(PwrMsg *req)
 {
     char *keyWords = NULL;
-    if (req->head.dataLen != 0 && !req->data && strlen(req->data) != 0) {
+    if (req->head.dataLen != 0 && req->data && strlen(req->data) != 0) {
         keyWords = req->data;
     }