diff --git a/README.md b/README.md
old mode 100644
new mode 100755
index d37a617c8..3e606214b
--- a/README.md
+++ b/README.md
@@ -208,6 +208,7 @@ Supported operating systems and hardware:
 * 2013-10-17, Created.<br/>
 
 ## History
+* v1.0, 2014-08-19, for [#160](https://github.com/winlinvip/simple-rtmp-server/issues/160), support forward/edge to flussonic, disable debug_srs_upnode to make flussonic happy. 0.9.201.
 * v1.0, 2014-08-17, for [#155](https://github.com/winlinvip/simple-rtmp-server/issues/155), refine for osx, with ssl/http, disable statistics. 0.9.198.
 * v1.0, 2014-08-06, fix [#148](https://github.com/winlinvip/simple-rtmp-server/issues/148), simplify the RTMP handshake key generation. 0.9.191.
 * v1.0, 2014-08-06, fix [#147](https://github.com/winlinvip/simple-rtmp-server/issues/147), support identify the srs edge. 0.9.190.
diff --git a/trunk/conf/full.conf b/trunk/conf/full.conf
index d1b8b32f3..044ee24b1 100644
--- a/trunk/conf/full.conf
+++ b/trunk/conf/full.conf
@@ -405,6 +405,17 @@ vhost hooks.callback.srs.com {
     }
 }
 
+# the vhost for srs debug info, whether send args in connect(tcUrl).
+vhost debug.srs.com {
+    # when upnode(forward to, edge push to, edge pull from) is srs,
+    # it's strongly recommend to open the debug_srs_upnode,
+    # when connect to upnode, it will take the debug info, 
+    # for example, the id, source id, pid.
+    # please see: https://github.com/winlinvip/simple-rtmp-server/wiki/SrsLog
+    # default: on
+    debug_srs_upnode    on;
+}
+
 # the vhost for min delay, donot cache any stream.
 vhost min.delay.com {
     # whether cache the last gop.
diff --git a/trunk/src/app/srs_app_config.cpp b/trunk/src/app/srs_app_config.cpp
index 53f8fe46a..1b4f69b15 100644
--- a/trunk/src/app/srs_app_config.cpp
+++ b/trunk/src/app/srs_app_config.cpp
@@ -436,7 +436,7 @@ int SrsConfig::reload_conf(SrsConfig* conf)
     // always support reload without additional code:
     //      chunk_size, ff_log_dir, max_connections,
     //      bandcheck, http_hooks, heartbeat, 
-    //      token_traverse
+    //      token_traverse, debug_srs_upnode
 
     // merge config: listen
     if (!srs_directive_equals(root->get("listen"), old_root->get("listen"))) {
@@ -1285,6 +1285,7 @@ int SrsConfig::check_config()
                 && n != "forward" && n != "transcode" && n != "bandcheck"
                 && n != "time_jitter" 
                 && n != "atc" && n != "atc_auto"
+                && n != "debug_srs_upnode"
             ) {
                 ret = ERROR_SYSTEM_CONFIG_INVALID;
                 srs_error("unsupported vhost directive %s, ret=%d", n.c_str(), ret);
@@ -1885,6 +1886,22 @@ bool SrsConfig::get_gop_cache(string vhost)
     return true;
 }
 
+bool SrsConfig::get_debug_srs_upnode(string vhost)
+{
+    SrsConfDirective* conf = get_vhost(vhost);
+
+    if (!conf) {
+        return true;
+    }
+    
+    conf = conf->get("debug_srs_upnode");
+    if (conf && conf->arg0() == "off") {
+        return false;
+    }
+    
+    return true;
+}
+
 bool SrsConfig::get_atc(string vhost)
 {
     SrsConfDirective* conf = get_vhost(vhost);
diff --git a/trunk/src/app/srs_app_config.hpp b/trunk/src/app/srs_app_config.hpp
index d3f3d6d46..fe92bb5a8 100644
--- a/trunk/src/app/srs_app_config.hpp
+++ b/trunk/src/app/srs_app_config.hpp
@@ -467,6 +467,15 @@ public:
     */
     virtual bool                get_gop_cache(std::string vhost);
     /**
+    * whether debug_srs_upnode is enabled of vhost.
+    * debug_srs_upnode is very important feature for tracable log,
+    * but some server, for instance, flussonic donot support it.
+    * @see https://github.com/winlinvip/simple-rtmp-server/issues/160
+    * @return true when debug_srs_upnode is ok; otherwise, false.
+    * @remark, default true.
+    */
+    virtual bool                get_debug_srs_upnode(std::string vhost);
+    /**
     * whether atc is enabled of vhost.
     * atc always use encoder timestamp, SRS never adjust the time.
     * @return true when atc is ok; otherwise, false.
diff --git a/trunk/src/app/srs_app_edge.cpp b/trunk/src/app/srs_app_edge.cpp
index cc26d6438..5102909ce 100644
--- a/trunk/src/app/srs_app_edge.cpp
+++ b/trunk/src/app/srs_app_edge.cpp
@@ -28,6 +28,8 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #include <netinet/in.h>
 #include <arpa/inet.h>
 
+using namespace std;
+
 #include <srs_kernel_error.hpp>
 #include <srs_protocol_rtmp.hpp>
 #include <srs_kernel_log.hpp>
@@ -118,7 +120,8 @@ int SrsEdgeIngester::cycle()
 {
     int ret = ERROR_SUCCESS;
     
-    if ((ret = connect_server()) != ERROR_SUCCESS) {
+    std::string ep_server, ep_port;
+    if ((ret = connect_server(ep_server, ep_port)) != ERROR_SUCCESS) {
         return ret;
     }
     srs_assert(client);
@@ -132,7 +135,7 @@ int SrsEdgeIngester::cycle()
         srs_error("handshake with server failed. ret=%d", ret);
         return ret;
     }
-    if ((ret = connect_app()) != ERROR_SUCCESS) {
+    if ((ret = connect_app(ep_server, ep_port)) != ERROR_SUCCESS) {
         return ret;
     }
     if ((ret = client->create_stream(stream_id)) != ERROR_SUCCESS) {
@@ -209,7 +212,7 @@ int SrsEdgeIngester::ingest()
     return ret;
 }
 
-int SrsEdgeIngester::connect_app()
+int SrsEdgeIngester::connect_app(string ep_server, string ep_port)
 {
     int ret = ERROR_SUCCESS;
     
@@ -243,9 +246,16 @@ int SrsEdgeIngester::connect_app()
     std::string local_ip = ips[_srs_config->get_stats_network()];
     data->set("srs_server_ip", SrsAmf0Any::str(local_ip.c_str()));
     
+    // generate the tcUrl
+    std::string param = "";
+    std::string tc_url = srs_generate_tc_url(ep_server, req->vhost, req->app, ep_port, param);
+    
     // upnode server identity will show in the connect_app of client.
-    if ((ret = client->connect_app(req->app, req->tcUrl, req)) != ERROR_SUCCESS) {
-        srs_error("connect with server failed, tcUrl=%s. ret=%d", req->tcUrl.c_str(), ret);
+    // @see https://github.com/winlinvip/simple-rtmp-server/issues/160
+    // the debug_srs_upnode is config in vhost and default to true.
+    bool debug_srs_upnode = _srs_config->get_debug_srs_upnode(req->vhost);
+    if ((ret = client->connect_app(req->app, tc_url, req, debug_srs_upnode)) != ERROR_SUCCESS) {
+        srs_error("connect with server failed, tcUrl=%s. ret=%d", tc_url.c_str(), ret);
         return ret;
     }
     
@@ -314,7 +324,7 @@ void SrsEdgeIngester::close_underlayer_socket()
     srs_close_stfd(stfd);
 }
 
-int SrsEdgeIngester::connect_server()
+int SrsEdgeIngester::connect_server(string& ep_server, string& ep_port)
 {
     int ret = ERROR_SUCCESS;
     
@@ -345,6 +355,10 @@ int SrsEdgeIngester::connect_server()
         port = ::atoi(s_port.c_str());
     }
     
+    // output the connected server and port.
+    ep_server = server;
+    ep_port = s_port;
+    
     // open socket.
     int64_t timeout = SRS_EDGE_INGESTER_TIMEOUT_US;
     if ((ret = srs_socket_connect(server, port, timeout, &stfd)) != ERROR_SUCCESS) {
@@ -414,7 +428,8 @@ int SrsEdgeForwarder::start()
     
     send_error_code = ERROR_SUCCESS;
     
-    if ((ret = connect_server()) != ERROR_SUCCESS) {
+    std::string ep_server, ep_port;
+    if ((ret = connect_server(ep_server, ep_port)) != ERROR_SUCCESS) {
         return ret;
     }
     srs_assert(client);
@@ -428,8 +443,8 @@ int SrsEdgeForwarder::start()
         srs_error("handshake with server failed. ret=%d", ret);
         return ret;
     }
-    if ((ret = client->connect_app(req->app, req->tcUrl)) != ERROR_SUCCESS) {
-        srs_error("connect with server failed, tcUrl=%s. ret=%d", req->tcUrl.c_str(), ret);
+    if ((ret = connect_app(ep_server, ep_port)) != ERROR_SUCCESS) {
+        srs_error("connect with server failed. ret=%d", ret);
         return ret;
     }
     if ((ret = client->create_stream(stream_id)) != ERROR_SUCCESS) {
@@ -575,7 +590,7 @@ void SrsEdgeForwarder::close_underlayer_socket()
     srs_close_stfd(stfd);
 }
 
-int SrsEdgeForwarder::connect_server()
+int SrsEdgeForwarder::connect_server(string& ep_server, string& ep_port)
 {
     int ret = ERROR_SUCCESS;
     
@@ -598,6 +613,10 @@ int SrsEdgeForwarder::connect_server()
         port = ::atoi(s_port.c_str());
     }
     
+    // output the connected server and port.
+    ep_server = server;
+    ep_port = s_port;
+    
     // open socket.
     int64_t timeout = SRS_EDGE_FORWARDER_TIMEOUT_US;
     if ((ret = srs_socket_connect(server, port, timeout, &stfd)) != ERROR_SUCCESS) {
@@ -622,6 +641,56 @@ int SrsEdgeForwarder::connect_server()
     return ret;
 }
 
+int SrsEdgeForwarder::connect_app(string ep_server, string ep_port)
+{
+    int ret = ERROR_SUCCESS;
+    
+    SrsRequest* req = _req;
+    
+    // args of request takes the srs info.
+    if (req->args == NULL) {
+        req->args = SrsAmf0Any::object();
+    }
+    
+    // notify server the edge identity,
+    // @see https://github.com/winlinvip/simple-rtmp-server/issues/147
+    SrsAmf0Object* data = req->args;
+    data->set("srs_sig", SrsAmf0Any::str(RTMP_SIG_SRS_KEY));
+    data->set("srs_server", SrsAmf0Any::str(RTMP_SIG_SRS_KEY" "RTMP_SIG_SRS_VERSION" ("RTMP_SIG_SRS_URL_SHORT")"));
+    data->set("srs_license", SrsAmf0Any::str(RTMP_SIG_SRS_LICENSE));
+    data->set("srs_role", SrsAmf0Any::str(RTMP_SIG_SRS_ROLE));
+    data->set("srs_url", SrsAmf0Any::str(RTMP_SIG_SRS_URL));
+    data->set("srs_version", SrsAmf0Any::str(RTMP_SIG_SRS_VERSION));
+    data->set("srs_site", SrsAmf0Any::str(RTMP_SIG_SRS_WEB));
+    data->set("srs_email", SrsAmf0Any::str(RTMP_SIG_SRS_EMAIL));
+    data->set("srs_copyright", SrsAmf0Any::str(RTMP_SIG_SRS_COPYRIGHT));
+    data->set("srs_primary_authors", SrsAmf0Any::str(RTMP_SIG_SRS_PRIMARY_AUTHROS));
+    // for edge to directly get the id of client.
+    data->set("srs_pid", SrsAmf0Any::number(getpid()));
+    data->set("srs_id", SrsAmf0Any::number(_srs_context->get_id()));
+    
+    // local ip of edge
+    std::vector<std::string> ips = srs_get_local_ipv4_ips();
+    assert(_srs_config->get_stats_network() < (int)ips.size());
+    std::string local_ip = ips[_srs_config->get_stats_network()];
+    data->set("srs_server_ip", SrsAmf0Any::str(local_ip.c_str()));
+    
+    // generate the tcUrl
+    std::string param = "";
+    std::string tc_url = srs_generate_tc_url(ep_server, req->vhost, req->app, ep_port, param);
+    
+    // upnode server identity will show in the connect_app of client.
+    // @see https://github.com/winlinvip/simple-rtmp-server/issues/160
+    // the debug_srs_upnode is config in vhost and default to true.
+    bool debug_srs_upnode = _srs_config->get_debug_srs_upnode(req->vhost);
+    if ((ret = client->connect_app(req->app, tc_url, req, debug_srs_upnode)) != ERROR_SUCCESS) {
+        srs_error("connect with server failed, tcUrl=%s. ret=%d", tc_url.c_str(), ret);
+        return ret;
+    }
+    
+    return ret;
+}
+
 SrsPlayEdge::SrsPlayEdge()
 {
     state = SrsEdgeStateInit;
diff --git a/trunk/src/app/srs_app_edge.hpp b/trunk/src/app/srs_app_edge.hpp
index 6e3bad6a1..9b0247ca1 100644
--- a/trunk/src/app/srs_app_edge.hpp
+++ b/trunk/src/app/srs_app_edge.hpp
@@ -33,6 +33,8 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #include <srs_app_st.hpp>
 #include <srs_app_thread.hpp>
 
+#include <string>
+
 class SrsStSocket;
 class SrsRtmpServer;
 class SrsSource;
@@ -100,8 +102,8 @@ public:
 private:
     virtual int ingest();
     virtual void close_underlayer_socket();
-    virtual int connect_server();
-    virtual int connect_app();
+    virtual int connect_server(std::string& ep_server, std::string& ep_port);
+    virtual int connect_app(std::string ep_server, std::string ep_port);
     virtual int process_publish_message(SrsMessage* msg);
 };
 
@@ -149,7 +151,8 @@ public:
     virtual int proxy(SrsMessage* msg);
 private:
     virtual void close_underlayer_socket();
-    virtual int connect_server();
+    virtual int connect_server(std::string& ep_server, std::string& ep_port);
+    virtual int connect_app(std::string ep_server, std::string ep_port);
 };
 
 /**
diff --git a/trunk/src/app/srs_app_forward.cpp b/trunk/src/app/srs_app_forward.cpp
index d1c1418e9..0994ffdca 100644
--- a/trunk/src/app/srs_app_forward.cpp
+++ b/trunk/src/app/srs_app_forward.cpp
@@ -81,8 +81,10 @@ int SrsForwarder::on_publish(SrsRequest* req, std::string forward_server)
 {
     int ret = ERROR_SUCCESS;
     
+    // TODO: FIXME: directly use the req object.
     // forward app
     app = req->app;
+    vhost = req->vhost;
     
     stream_name = req->stream;
     server = forward_server;
@@ -215,7 +217,11 @@ int SrsForwarder::cycle()
         srs_error("handshake with server failed. ret=%d", ret);
         return ret;
     }
-    if ((ret = client->connect_app(app, tc_url)) != ERROR_SUCCESS) {
+    // TODO: FIXME: take debug info for srs, @see SrsEdgeForwarder.connect_server.
+    // @see https://github.com/winlinvip/simple-rtmp-server/issues/160
+    // the debug_srs_upnode is config in vhost and default to true.
+    bool debug_srs_upnode = _srs_config->get_debug_srs_upnode(vhost);
+    if ((ret = client->connect_app(app, tc_url, NULL, debug_srs_upnode)) != ERROR_SUCCESS) {
         srs_error("connect with server failed, tcUrl=%s. ret=%d", tc_url.c_str(), ret);
         return ret;
     }
diff --git a/trunk/src/app/srs_app_forward.hpp b/trunk/src/app/srs_app_forward.hpp
index 72ee62f77..aae1b132e 100644
--- a/trunk/src/app/srs_app_forward.hpp
+++ b/trunk/src/app/srs_app_forward.hpp
@@ -53,6 +53,7 @@ class SrsForwarder : public ISrsThreadHandler
 private:
     std::string app;
     std::string tc_url;
+    std::string vhost;
     std::string stream_name;
     int stream_id;
     std::string server;
@@ -83,6 +84,7 @@ public:
     virtual int cycle();
 private:
     virtual void close_underlayer_socket();
+    // TODO: FIXME: take debug info for srs, @see SrsEdgeForwarder.connect_server.
     virtual int connect_server();
     virtual int forward();
 };
diff --git a/trunk/src/core/srs_core.hpp b/trunk/src/core/srs_core.hpp
index 7cd1e0468..78823f874 100644
--- a/trunk/src/core/srs_core.hpp
+++ b/trunk/src/core/srs_core.hpp
@@ -31,7 +31,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 // current release version
 #define VERSION_MAJOR "0"
 #define VERSION_MINOR "9"
-#define VERSION_REVISION "200"
+#define VERSION_REVISION "201"
 #define RTMP_SIG_SRS_VERSION VERSION_MAJOR"."VERSION_MINOR"."VERSION_REVISION
 // server info.
 #define RTMP_SIG_SRS_KEY "SRS"
diff --git a/trunk/src/libs/srs_librtmp.cpp b/trunk/src/libs/srs_librtmp.cpp
index 10f2a7e68..5a561a3b0 100644
--- a/trunk/src/libs/srs_librtmp.cpp
+++ b/trunk/src/libs/srs_librtmp.cpp
@@ -283,7 +283,7 @@ int srs_connect_app2(srs_rtmp_t rtmp,
     
     std::string sip, sserver, sauthors, sversion;
     
-    if ((ret = context->rtmp->connect_app2(context->app, tcUrl, NULL, 
+    if ((ret = context->rtmp->connect_app2(context->app, tcUrl, NULL, true,
         sip, sserver, sauthors, sversion, *srs_id, *srs_pid)) != ERROR_SUCCESS) {
         return ret;
     }
diff --git a/trunk/src/rtmp/srs_protocol_rtmp.cpp b/trunk/src/rtmp/srs_protocol_rtmp.cpp
index e82712669..4a4b4f76d 100644
--- a/trunk/src/rtmp/srs_protocol_rtmp.cpp
+++ b/trunk/src/rtmp/srs_protocol_rtmp.cpp
@@ -434,7 +434,7 @@ int SrsRtmpClient::complex_handshake()
     return ret;
 }
 
-int SrsRtmpClient::connect_app(string app, string tc_url, SrsRequest* req)
+int SrsRtmpClient::connect_app(string app, string tc_url, SrsRequest* req, bool debug_srs_upnode)
 {
     std::string srs_server_ip;
     std::string srs_server;
@@ -443,13 +443,13 @@ int SrsRtmpClient::connect_app(string app, string tc_url, SrsRequest* req)
     int srs_id = 0;
     int srs_pid = 0;
     
-    return connect_app2(app, tc_url, req, 
+    return connect_app2(app, tc_url, req, debug_srs_upnode,
         srs_server_ip, srs_server, srs_primary_authors, 
         srs_version, srs_id, srs_pid);
 }
 
 int SrsRtmpClient::connect_app2(
-    string app, string tc_url, SrsRequest* req, 
+    string app, string tc_url, SrsRequest* req, bool debug_srs_upnode,
     string& srs_server_ip, string& srs_server, string& srs_primary_authors, 
     string& srs_version, int& srs_id, int& srs_pid
 ){
@@ -479,7 +479,9 @@ int SrsRtmpClient::connect_app2(
         }
         pkt->command_object->set("objectEncoding", SrsAmf0Any::number(0));
         
-        if (req && req->args) {
+        // @see https://github.com/winlinvip/simple-rtmp-server/issues/160
+        // the debug_srs_upnode is config in vhost and default to true.
+        if (debug_srs_upnode && req && req->args) {
             srs_freep(pkt->args);
             pkt->args = req->args->copy()->to_object();
         }
diff --git a/trunk/src/rtmp/srs_protocol_rtmp.hpp b/trunk/src/rtmp/srs_protocol_rtmp.hpp
index 71bd95cbb..2a023d864 100644
--- a/trunk/src/rtmp/srs_protocol_rtmp.hpp
+++ b/trunk/src/rtmp/srs_protocol_rtmp.hpp
@@ -247,7 +247,8 @@ public:
     *      pageUrl and swfUrl for refer antisuck.
     *      args for edge to origin traverse auth, @see SrsRequest.args
     */
-    virtual int connect_app(std::string app, std::string tc_url, SrsRequest* req=NULL);
+    virtual int connect_app(std::string app, std::string tc_url, 
+        SrsRequest* req=NULL, bool debug_srs_upnode=true);
     /**
     * connect to server, get the debug srs info.
     * 
@@ -263,7 +264,7 @@ public:
     * @param srs_pid, int, debug info, server pid in log.
     */
     virtual int connect_app2(
-        std::string app, std::string tc_url, SrsRequest* req, 
+        std::string app, std::string tc_url, SrsRequest* req, bool debug_srs_upnode,
         std::string& srs_server_ip, std::string& srs_server, std::string& srs_primary_authors, 
         std::string& srs_version, int& srs_id, int& srs_pid
     );
diff --git a/trunk/src/rtmp/srs_protocol_stack.cpp b/trunk/src/rtmp/srs_protocol_stack.cpp
index 714a3558e..95a4d77c9 100644
--- a/trunk/src/rtmp/srs_protocol_stack.cpp
+++ b/trunk/src/rtmp/srs_protocol_stack.cpp
@@ -1496,6 +1496,17 @@ int SrsProtocol::on_recv_message(SrsMessage* msg)
         case RTMP_MSG_SetChunkSize: {
             SrsSetChunkSizePacket* pkt = dynamic_cast<SrsSetChunkSizePacket*>(packet);
             srs_assert(pkt != NULL);
+
+            // for some server, the actual chunk size can greater than the max value(65536),
+            // so we just warning the invalid chunk size, and actually use it is ok,
+            // @see: https://github.com/winlinvip/simple-rtmp-server/issues/160
+            if (pkt->chunk_size < SRS_CONSTS_RTMP_MIN_CHUNK_SIZE 
+                || pkt->chunk_size > SRS_CONSTS_RTMP_MAX_CHUNK_SIZE) 
+            {
+                srs_warn("accept chunk size %d, but should in [%d, %d]",
+                    pkt->chunk_size, SRS_CONSTS_RTMP_MIN_CHUNK_SIZE, 
+                    SRS_CONSTS_RTMP_MAX_CHUNK_SIZE);
+            }
             
             in_chunk_size = pkt->chunk_size;
             
@@ -3711,19 +3722,6 @@ int SrsSetChunkSizePacket::decode(SrsStream* stream)
     chunk_size = stream->read_4bytes();
     srs_info("decode chunk size success. chunk_size=%d", chunk_size);
     
-    if (chunk_size < SRS_CONSTS_RTMP_MIN_CHUNK_SIZE) {
-        ret = ERROR_RTMP_CHUNK_SIZE;
-        srs_error("invalid chunk size. min=%d, actual=%d, ret=%d", 
-            ERROR_RTMP_CHUNK_SIZE, chunk_size, ret);
-        return ret;
-    }
-    if (chunk_size > SRS_CONSTS_RTMP_MAX_CHUNK_SIZE) {
-        ret = ERROR_RTMP_CHUNK_SIZE;
-        srs_error("invalid chunk size. max=%d, actual=%d, ret=%d", 
-            SRS_CONSTS_RTMP_MAX_CHUNK_SIZE, chunk_size, ret);
-        return ret;
-    }
-    
     return ret;
 }
 
diff --git a/trunk/src/utest/srs_utest_config.cpp b/trunk/src/utest/srs_utest_config.cpp
index 232dcf3c3..b92cee3b8 100644
--- a/trunk/src/utest/srs_utest_config.cpp
+++ b/trunk/src/utest/srs_utest_config.cpp
@@ -491,6 +491,17 @@ std::string __full_conf = ""
     "    queue_length    10;                                                                                                                \n"
     "}                                                                                                                                      \n"
     "                                                                                                                                       \n"
+    "# the vhost for srs debug info, whether send args in connect(tcUrl).                                                                   \n"
+    "vhost debug.srs.com {                                                                                                                  \n"
+    "    # when upnode(forward to, edge push to, edge pull from) is srs,                                                                    \n"
+    "    # it's strongly recommend to open the debug_srs_upnode,                                                                            \n"
+    "    # when connect to upnode, it will take the debug info,                                                                             \n"
+    "    # for example, the id, source id, pid.                                                                                             \n"
+    "    # please see: https://github.com/winlinvip/simple-rtmp-server/wiki/SrsLog                                                          \n"
+    "    # default: on                                                                                                                      \n"
+    "    debug_srs_upnode    on;                                                                                                            \n"
+    "}                                                                                                                                      \n"
+    "                                                                                                                                       \n"
     "# the vhost for antisuck.                                                                                                              \n"
     "vhost refer.anti_suck.com {                                                                                                            \n"
     "    # the common refer for play and publish.                                                                                           \n"
@@ -1864,6 +1875,7 @@ VOID TEST(ConfigMainTest, ParseFullConf)
     EXPECT_TRUE(conf.get_vhost_enabled(vhost));
     EXPECT_TRUE(conf.get_vhost_enabled(conf.get_vhost(vhost)));
     EXPECT_TRUE(conf.get_gop_cache(vhost));
+    EXPECT_TRUE(conf.get_debug_srs_upnode(vhost));
     EXPECT_FALSE(conf.get_atc(vhost));
     EXPECT_TRUE(conf.get_atc_auto(vhost));
     EXPECT_TRUE(conf.get_time_jitter(vhost) == SrsRtmpJitterAlgorithmFULL);
@@ -1944,6 +1956,7 @@ VOID TEST(ConfigMainTest, ParseFullConf_same_edge)
     EXPECT_TRUE(conf.get_vhost_enabled(vhost));
     EXPECT_TRUE(conf.get_vhost_enabled(conf.get_vhost(vhost)));
     EXPECT_TRUE(conf.get_gop_cache(vhost));
+    EXPECT_TRUE(conf.get_debug_srs_upnode(vhost));
     EXPECT_FALSE(conf.get_atc(vhost));
     EXPECT_TRUE(conf.get_atc_auto(vhost));
     EXPECT_TRUE(conf.get_time_jitter(vhost) == SrsRtmpJitterAlgorithmFULL);
@@ -2023,6 +2036,7 @@ VOID TEST(ConfigMainTest, ParseFullConf_change_edge)
     /*EXPECT_TRUE(conf.get_vhost_enabled(vhost));
     EXPECT_TRUE(conf.get_vhost_enabled(conf.get_vhost(vhost)));
     EXPECT_TRUE(conf.get_gop_cache(vhost));
+    EXPECT_TRUE(conf.get_debug_srs_upnode(vhost));
     EXPECT_FALSE(conf.get_atc(vhost));
     EXPECT_TRUE(conf.get_atc_auto(vhost));
     EXPECT_TRUE(conf.get_time_jitter(vhost) == SrsRtmpJitterAlgorithmFULL);
@@ -2096,6 +2110,7 @@ VOID TEST(ConfigMainTest, ParseFullConf_dvr)
     EXPECT_TRUE(conf.get_vhost_enabled(vhost));
     EXPECT_TRUE(conf.get_vhost_enabled(conf.get_vhost(vhost)));
     EXPECT_TRUE(conf.get_gop_cache(vhost));
+    EXPECT_TRUE(conf.get_debug_srs_upnode(vhost));
     EXPECT_FALSE(conf.get_atc(vhost));
     EXPECT_TRUE(conf.get_atc_auto(vhost));
     EXPECT_TRUE(conf.get_time_jitter(vhost) == SrsRtmpJitterAlgorithmFULL);
@@ -2169,6 +2184,7 @@ VOID TEST(ConfigMainTest, ParseFullConf_ingest)
     EXPECT_TRUE(conf.get_vhost_enabled(vhost));
     EXPECT_TRUE(conf.get_vhost_enabled(conf.get_vhost(vhost)));
     EXPECT_TRUE(conf.get_gop_cache(vhost));
+    EXPECT_TRUE(conf.get_debug_srs_upnode(vhost));
     EXPECT_FALSE(conf.get_atc(vhost));
     EXPECT_TRUE(conf.get_atc_auto(vhost));
     EXPECT_TRUE(conf.get_time_jitter(vhost) == SrsRtmpJitterAlgorithmFULL);
@@ -2263,6 +2279,7 @@ VOID TEST(ConfigMainTest, ParseFullConf_http)
     EXPECT_TRUE(conf.get_vhost_enabled(vhost));
     EXPECT_TRUE(conf.get_vhost_enabled(conf.get_vhost(vhost)));
     EXPECT_TRUE(conf.get_gop_cache(vhost));
+    EXPECT_TRUE(conf.get_debug_srs_upnode(vhost));
     EXPECT_FALSE(conf.get_atc(vhost));
     EXPECT_TRUE(conf.get_atc_auto(vhost));
     EXPECT_TRUE(conf.get_time_jitter(vhost) == SrsRtmpJitterAlgorithmFULL);
@@ -2339,6 +2356,7 @@ VOID TEST(ConfigMainTest, ParseFullConf_hls_enabled)
     EXPECT_TRUE(conf.get_vhost_enabled(vhost));
     EXPECT_TRUE(conf.get_vhost_enabled(conf.get_vhost(vhost)));
     EXPECT_TRUE(conf.get_gop_cache(vhost));
+    EXPECT_TRUE(conf.get_debug_srs_upnode(vhost));
     EXPECT_FALSE(conf.get_atc(vhost));
     EXPECT_TRUE(conf.get_atc_auto(vhost));
     EXPECT_TRUE(conf.get_time_jitter(vhost) == SrsRtmpJitterAlgorithmFULL);
@@ -2415,6 +2433,7 @@ VOID TEST(ConfigMainTest, ParseFullConf_hls_disabled)
     EXPECT_TRUE(conf.get_vhost_enabled(vhost));
     EXPECT_TRUE(conf.get_vhost_enabled(conf.get_vhost(vhost)));
     EXPECT_TRUE(conf.get_gop_cache(vhost));
+    EXPECT_TRUE(conf.get_debug_srs_upnode(vhost));
     EXPECT_FALSE(conf.get_atc(vhost));
     EXPECT_TRUE(conf.get_atc_auto(vhost));
     EXPECT_TRUE(conf.get_time_jitter(vhost) == SrsRtmpJitterAlgorithmFULL);
@@ -2491,6 +2510,7 @@ VOID TEST(ConfigMainTest, ParseFullConf_http_hooks)
     EXPECT_TRUE(conf.get_vhost_enabled(vhost));
     EXPECT_TRUE(conf.get_vhost_enabled(conf.get_vhost(vhost)));
     EXPECT_TRUE(conf.get_gop_cache(vhost));
+    EXPECT_TRUE(conf.get_debug_srs_upnode(vhost));
     EXPECT_FALSE(conf.get_atc(vhost));
     EXPECT_TRUE(conf.get_atc_auto(vhost));
     EXPECT_TRUE(conf.get_time_jitter(vhost) == SrsRtmpJitterAlgorithmFULL);
@@ -2598,6 +2618,7 @@ VOID TEST(ConfigMainTest, ParseFullConf_min_delay)
     EXPECT_TRUE(conf.get_vhost_enabled(vhost));
     EXPECT_TRUE(conf.get_vhost_enabled(conf.get_vhost(vhost)));
     EXPECT_FALSE(conf.get_gop_cache(vhost));
+    EXPECT_TRUE(conf.get_debug_srs_upnode(vhost));
     EXPECT_FALSE(conf.get_atc(vhost));
     EXPECT_TRUE(conf.get_atc_auto(vhost));
     EXPECT_TRUE(conf.get_time_jitter(vhost) == SrsRtmpJitterAlgorithmFULL);
@@ -2675,6 +2696,7 @@ VOID TEST(ConfigMainTest, ParseFullConf_refer_anti_suck)
     EXPECT_TRUE(conf.get_vhost_enabled(vhost));
     EXPECT_TRUE(conf.get_vhost_enabled(conf.get_vhost(vhost)));
     EXPECT_TRUE(conf.get_gop_cache(vhost));
+    EXPECT_TRUE(conf.get_debug_srs_upnode(vhost));
     EXPECT_FALSE(conf.get_atc(vhost));
     EXPECT_TRUE(conf.get_atc_auto(vhost));
     EXPECT_TRUE(conf.get_time_jitter(vhost) == SrsRtmpJitterAlgorithmFULL);
@@ -2767,6 +2789,7 @@ VOID TEST(ConfigMainTest, ParseFullConf_forward_same_vhost)
     EXPECT_TRUE(conf.get_vhost_enabled(vhost));
     EXPECT_TRUE(conf.get_vhost_enabled(conf.get_vhost(vhost)));
     EXPECT_TRUE(conf.get_gop_cache(vhost));
+    EXPECT_TRUE(conf.get_debug_srs_upnode(vhost));
     EXPECT_FALSE(conf.get_atc(vhost));
     EXPECT_TRUE(conf.get_atc_auto(vhost));
     EXPECT_TRUE(conf.get_time_jitter(vhost) == SrsRtmpJitterAlgorithmFULL);
@@ -2850,6 +2873,7 @@ VOID TEST(ConfigMainTest, ParseFullConf_forward_change_vhost)
     /*EXPECT_TRUE(conf.get_vhost_enabled(vhost));
     EXPECT_TRUE(conf.get_vhost_enabled(conf.get_vhost(vhost)));
     EXPECT_TRUE(conf.get_gop_cache(vhost));
+    EXPECT_TRUE(conf.get_debug_srs_upnode(vhost));
     EXPECT_FALSE(conf.get_atc(vhost));
     EXPECT_TRUE(conf.get_atc_auto(vhost));
     EXPECT_TRUE(conf.get_time_jitter(vhost) == SrsRtmpJitterAlgorithmFULL);
@@ -2927,6 +2951,7 @@ VOID TEST(ConfigMainTest, ParseFullConf_transcode_mirror)
     EXPECT_TRUE(conf.get_vhost_enabled(vhost));
     EXPECT_TRUE(conf.get_vhost_enabled(conf.get_vhost(vhost)));
     EXPECT_TRUE(conf.get_gop_cache(vhost));
+    EXPECT_TRUE(conf.get_debug_srs_upnode(vhost));
     EXPECT_FALSE(conf.get_atc(vhost));
     EXPECT_TRUE(conf.get_atc_auto(vhost));
     EXPECT_TRUE(conf.get_time_jitter(vhost) == SrsRtmpJitterAlgorithmFULL);
@@ -3015,6 +3040,7 @@ VOID TEST(ConfigMainTest, ParseFullConf_transcode_crop)
     EXPECT_TRUE(conf.get_vhost_enabled(vhost));
     EXPECT_TRUE(conf.get_vhost_enabled(conf.get_vhost(vhost)));
     EXPECT_TRUE(conf.get_gop_cache(vhost));
+    EXPECT_TRUE(conf.get_debug_srs_upnode(vhost));
     EXPECT_FALSE(conf.get_atc(vhost));
     EXPECT_TRUE(conf.get_atc_auto(vhost));
     EXPECT_TRUE(conf.get_time_jitter(vhost) == SrsRtmpJitterAlgorithmFULL);
@@ -3103,6 +3129,7 @@ VOID TEST(ConfigMainTest, ParseFullConf_transcode_logo)
     EXPECT_TRUE(conf.get_vhost_enabled(vhost));
     EXPECT_TRUE(conf.get_vhost_enabled(conf.get_vhost(vhost)));
     EXPECT_TRUE(conf.get_gop_cache(vhost));
+    EXPECT_TRUE(conf.get_debug_srs_upnode(vhost));
     EXPECT_FALSE(conf.get_atc(vhost));
     EXPECT_TRUE(conf.get_atc_auto(vhost));
     EXPECT_TRUE(conf.get_time_jitter(vhost) == SrsRtmpJitterAlgorithmFULL);
@@ -3191,6 +3218,7 @@ VOID TEST(ConfigMainTest, ParseFullConf_transcode_audio)
     EXPECT_TRUE(conf.get_vhost_enabled(vhost));
     EXPECT_TRUE(conf.get_vhost_enabled(conf.get_vhost(vhost)));
     EXPECT_TRUE(conf.get_gop_cache(vhost));
+    EXPECT_TRUE(conf.get_debug_srs_upnode(vhost));
     EXPECT_FALSE(conf.get_atc(vhost));
     EXPECT_TRUE(conf.get_atc_auto(vhost));
     EXPECT_TRUE(conf.get_time_jitter(vhost) == SrsRtmpJitterAlgorithmFULL);
@@ -3273,6 +3301,7 @@ VOID TEST(ConfigMainTest, ParseFullConf_transcode_vn)
     EXPECT_TRUE(conf.get_vhost_enabled(vhost));
     EXPECT_TRUE(conf.get_vhost_enabled(conf.get_vhost(vhost)));
     EXPECT_TRUE(conf.get_gop_cache(vhost));
+    EXPECT_TRUE(conf.get_debug_srs_upnode(vhost));
     EXPECT_FALSE(conf.get_atc(vhost));
     EXPECT_TRUE(conf.get_atc_auto(vhost));
     EXPECT_TRUE(conf.get_time_jitter(vhost) == SrsRtmpJitterAlgorithmFULL);
@@ -3355,6 +3384,7 @@ VOID TEST(ConfigMainTest, ParseFullConf_transcode_copy)
     EXPECT_TRUE(conf.get_vhost_enabled(vhost));
     EXPECT_TRUE(conf.get_vhost_enabled(conf.get_vhost(vhost)));
     EXPECT_TRUE(conf.get_gop_cache(vhost));
+    EXPECT_TRUE(conf.get_debug_srs_upnode(vhost));
     EXPECT_FALSE(conf.get_atc(vhost));
     EXPECT_TRUE(conf.get_atc_auto(vhost));
     EXPECT_TRUE(conf.get_time_jitter(vhost) == SrsRtmpJitterAlgorithmFULL);
@@ -3433,6 +3463,7 @@ VOID TEST(ConfigMainTest, ParseFullConf_transcode_all)
     EXPECT_TRUE(conf.get_vhost_enabled(vhost));
     EXPECT_TRUE(conf.get_vhost_enabled(conf.get_vhost(vhost)));
     EXPECT_TRUE(conf.get_gop_cache(vhost));
+    EXPECT_TRUE(conf.get_debug_srs_upnode(vhost));
     EXPECT_FALSE(conf.get_atc(vhost));
     EXPECT_TRUE(conf.get_atc_auto(vhost));
     EXPECT_TRUE(conf.get_time_jitter(vhost) == SrsRtmpJitterAlgorithmFULL);
@@ -3649,6 +3680,7 @@ VOID TEST(ConfigMainTest, ParseFullConf_transcode_ffempty)
     EXPECT_TRUE(conf.get_vhost_enabled(vhost));
     EXPECT_TRUE(conf.get_vhost_enabled(conf.get_vhost(vhost)));
     EXPECT_TRUE(conf.get_gop_cache(vhost));
+    EXPECT_TRUE(conf.get_debug_srs_upnode(vhost));
     EXPECT_FALSE(conf.get_atc(vhost));
     EXPECT_TRUE(conf.get_atc_auto(vhost));
     EXPECT_TRUE(conf.get_time_jitter(vhost) == SrsRtmpJitterAlgorithmFULL);
@@ -3737,6 +3769,7 @@ VOID TEST(ConfigMainTest, ParseFullConf_transcode_app)
     EXPECT_TRUE(conf.get_vhost_enabled(vhost));
     EXPECT_TRUE(conf.get_vhost_enabled(conf.get_vhost(vhost)));
     EXPECT_TRUE(conf.get_gop_cache(vhost));
+    EXPECT_TRUE(conf.get_debug_srs_upnode(vhost));
     EXPECT_FALSE(conf.get_atc(vhost));
     EXPECT_TRUE(conf.get_atc_auto(vhost));
     EXPECT_TRUE(conf.get_time_jitter(vhost) == SrsRtmpJitterAlgorithmFULL);
@@ -3825,6 +3858,7 @@ VOID TEST(ConfigMainTest, ParseFullConf_transcode_stream)
     EXPECT_TRUE(conf.get_vhost_enabled(vhost));
     EXPECT_TRUE(conf.get_vhost_enabled(conf.get_vhost(vhost)));
     EXPECT_TRUE(conf.get_gop_cache(vhost));
+    EXPECT_TRUE(conf.get_debug_srs_upnode(vhost));
     EXPECT_FALSE(conf.get_atc(vhost));
     EXPECT_TRUE(conf.get_atc_auto(vhost));
     EXPECT_TRUE(conf.get_time_jitter(vhost) == SrsRtmpJitterAlgorithmFULL);
@@ -3913,6 +3947,7 @@ VOID TEST(ConfigMainTest, ParseFullConf_bandcheck)
     EXPECT_TRUE(conf.get_vhost_enabled(vhost));
     EXPECT_TRUE(conf.get_vhost_enabled(conf.get_vhost(vhost)));
     EXPECT_TRUE(conf.get_gop_cache(vhost));
+    EXPECT_TRUE(conf.get_debug_srs_upnode(vhost));
     EXPECT_FALSE(conf.get_atc(vhost));
     EXPECT_TRUE(conf.get_atc_auto(vhost));
     EXPECT_TRUE(conf.get_time_jitter(vhost) == SrsRtmpJitterAlgorithmFULL);
@@ -3990,6 +4025,7 @@ VOID TEST(ConfigMainTest, ParseFullConf_chunksize)
     EXPECT_TRUE(conf.get_vhost_enabled(vhost));
     EXPECT_TRUE(conf.get_vhost_enabled(conf.get_vhost(vhost)));
     EXPECT_TRUE(conf.get_gop_cache(vhost));
+    EXPECT_TRUE(conf.get_debug_srs_upnode(vhost));
     EXPECT_FALSE(conf.get_atc(vhost));
     EXPECT_TRUE(conf.get_atc_auto(vhost));
     EXPECT_TRUE(conf.get_time_jitter(vhost) == SrsRtmpJitterAlgorithmFULL);
@@ -4067,6 +4103,7 @@ VOID TEST(ConfigMainTest, ParseFullConf_jitter)
     EXPECT_TRUE(conf.get_vhost_enabled(vhost));
     EXPECT_TRUE(conf.get_vhost_enabled(conf.get_vhost(vhost)));
     EXPECT_TRUE(conf.get_gop_cache(vhost));
+    EXPECT_TRUE(conf.get_debug_srs_upnode(vhost));
     EXPECT_FALSE(conf.get_atc(vhost));
     EXPECT_TRUE(conf.get_atc_auto(vhost));
     EXPECT_TRUE(conf.get_time_jitter(vhost) == SrsRtmpJitterAlgorithmFULL);
@@ -4144,6 +4181,7 @@ VOID TEST(ConfigMainTest, ParseFullConf_atc)
     EXPECT_TRUE(conf.get_vhost_enabled(vhost));
     EXPECT_TRUE(conf.get_vhost_enabled(conf.get_vhost(vhost)));
     EXPECT_TRUE(conf.get_gop_cache(vhost));
+    EXPECT_TRUE(conf.get_debug_srs_upnode(vhost));
     EXPECT_TRUE(conf.get_atc(vhost));
     EXPECT_TRUE(conf.get_atc_auto(vhost));
     EXPECT_TRUE(conf.get_time_jitter(vhost) == SrsRtmpJitterAlgorithmFULL);
@@ -4221,6 +4259,7 @@ VOID TEST(ConfigMainTest, ParseFullConf_removed)
     EXPECT_FALSE(conf.get_vhost_enabled(vhost));
     EXPECT_FALSE(conf.get_vhost_enabled(conf.get_vhost(vhost)));
     EXPECT_TRUE(conf.get_gop_cache(vhost));
+    EXPECT_TRUE(conf.get_debug_srs_upnode(vhost));
     EXPECT_FALSE(conf.get_atc(vhost));
     EXPECT_TRUE(conf.get_atc_auto(vhost));
     EXPECT_TRUE(conf.get_time_jitter(vhost) == SrsRtmpJitterAlgorithmFULL);
@@ -4973,6 +5012,19 @@ VOID TEST(ConfigMainTest, CheckConf_gop_cache)
     }
 }
 
+VOID TEST(ConfigMainTest, CheckConf_debug_srs_upnode)
+{
+    if (true) {
+        MockSrsConfig conf;
+        EXPECT_TRUE(ERROR_SUCCESS == conf.parse(_MIN_OK_CONF"vhost v{debug_srs_upnode off;}"));
+    }
+    
+    if (true) {
+        MockSrsConfig conf;
+        EXPECT_TRUE(ERROR_SUCCESS != conf.parse(_MIN_OK_CONF"vhost v{debug_srs_upnodes off;}"));
+    }
+}
+
 VOID TEST(ConfigMainTest, CheckConf_refer)
 {
     if (true) {