diff --git a/src/daemon/jdwp.cpp b/src/daemon/jdwp.cpp
index 488a66ca51fcf1c4965c1c6554270c33d2a267c6..216e822d2896da2f7b84880e71798f60f92f9974 100644
--- a/src/daemon/jdwp.cpp
+++ b/src/daemon/jdwp.cpp
@@ -83,37 +83,26 @@ void HdcJdwp::ReadStream(uv_stream_t *pipe, ssize_t nread, const uv_buf_t *buf)
     bool ret = false;
     HCtxJdwp ctxJdwp = (HCtxJdwp)pipe->data;
     HdcJdwp *thisClass = (HdcJdwp *)ctxJdwp->thisClass;
-    char temp[5];
+    char *p = ctxJdwp->buf;
     uint32_t pid = 0;
-    int offset = 0;
-    if (nread > 0) {
-        ctxJdwp->bufIndex += nread;
+
+    if (nread == UV_ENOBUFS) {  // It is definite enough, usually only 4 bytes
+        WRITE_LOG(LOG_DEBUG, "HdcJdwp::ReadStream IOBuf max");
+        goto free;
+    } else if (nread <= 0 ) {
+        WRITE_LOG(LOG_DEBUG, "HdcJdwp::ReadStream program exit pid:%d", ctxJdwp->pid);
+        return;
     }
-    // read the PID as a 4-hexchar string
-    while (offset < ctxJdwp->bufIndex) {
-        if (nread == UV_ENOBUFS) {  // It is definite enough, usually only 4 bytes
-            WRITE_LOG(LOG_DEBUG, "HdcJdwp::ReadStream IOBuf max");
-            break;
-        } else if (nread <= 0 || nread != 4) {  // 4 : 4 bytes
-            WRITE_LOG(LOG_DEBUG, "HdcJdwp::ReadStream program exit pid:%d", ctxJdwp->pid);
-            break;
-        }
-        int errCode = memcpy_s(temp, sizeof(temp), ctxJdwp->buf + offset, 4);  // 4 : 4 bytes
-        if (errCode != EOK) {
-            break;
-        }
-        temp[4] = 0;  // 4 : pid length
-        if (sscanf_s(temp, "%04x", &pid) != 1) {
-            WRITE_LOG(LOG_WARN, "could not decode PID number: '%s'", temp);
-            break;
-        }
-        WRITE_LOG(LOG_DEBUG, "JDWP accept pid:%d", pid);
+    pid = atoi(p);
+    if(pid > 0) {
+        WRITE_LOG(LOG_DEBUG, "JDWP accept pid:%d", pid );
         ctxJdwp->pid = pid;
         thisClass->AdminContext(OP_ADD, pid, ctxJdwp);
-        offset += 4;  // 4 : 4 bytes
+        WRITE_LOG(LOG_DEBUG, "JDWP OP_ADD :%d", pid );
         ret = true;
-        break;  // just 4bytes, now finish
     }
+free:
+    Base::ZeroArray(ctxJdwp->buf);
     if (!ret) {
         thisClass->FreeContext(ctxJdwp);
     }
@@ -135,8 +124,8 @@ void HdcJdwp::AcceptClient(uv_stream_t *server, int status)
     }
     auto funAlloc = [](uv_handle_t *handle, size_t sizeSuggested, uv_buf_t *buf) -> void {
         HCtxJdwp ctxJdwp = (HCtxJdwp)handle->data;
-        buf->base = (char *)ctxJdwp->buf + ctxJdwp->bufIndex;
-        buf->len = sizeof(ctxJdwp->buf) - ctxJdwp->bufIndex;
+        buf->base = (char *)ctxJdwp->buf ;
+        buf->len = sizeof(ctxJdwp->buf);
     };
     uv_read_start((uv_stream_t *)&ctxJdwp->pipe, funAlloc, ReadStream);
 }
diff --git a/src/daemon/jdwp.h b/src/daemon/jdwp.h
index d885f6bc78a38c98b56d3d30c77419fe5c268cce..6463eb349ed46d4269051314e398d2c99930bbe2 100644
--- a/src/daemon/jdwp.h
+++ b/src/daemon/jdwp.h
@@ -17,6 +17,7 @@
 #include "daemon_common.h"
 
 namespace Hdc {
+#define RECV_PID_SIZE sizeof(uint32_t)
 class HdcJdwp {
 public:
     HdcJdwp(uv_loop_t *loopIn);
@@ -35,9 +36,7 @@ private:
         uv_pipe_t pipe;
         HdcJdwp *thisClass;
         bool finish;
-        uint8_t buf[16];  // read read 4 bytes ascii
-        uint8_t bufIndex;
-
+        char buf[RECV_PID_SIZE];
         uint8_t dummy;
         uv_tcp_t jvmTCP;
     };