diff --git a/trunk/doc/CHANGELOG.md b/trunk/doc/CHANGELOG.md
index b3bf4b5375..f8dd268618 100644
--- a/trunk/doc/CHANGELOG.md
+++ b/trunk/doc/CHANGELOG.md
@@ -8,6 +8,7 @@ The changelog for SRS.
 
 ## SRS 4.0 Changelog
 
+* v4.0, 2021-12-31, For [#2728](https://github.com/ossrs/srs/issues/2728): Refine error log for rtmp2rtc. (#2728). v4.0.215
 * v4.0, 2021-12-29, Merge [#2770](https://github.com/ossrs/srs/pull/2770), [#2820](https://github.com/ossrs/srs/pull/2820): Bugs fixed. (#2770)(#2820). v4.0.214
 * v4.0, 2021-12-27, Fix [#2811](https://github.com/ossrs/srs/issues/2811): Fix ulimit issue by detecting epoll on Ubuntu. (#2811). v4.0.213
 * v4.0, 2021-12-26, Fix [#2247](https://github.com/ossrs/srs/pull/2247): Cleanup server for GMC, by WaitGroup to destroy. (#2247). v4.0.212
diff --git a/trunk/src/app/srs_app_rtc_api.cpp b/trunk/src/app/srs_app_rtc_api.cpp
index b52bd37e79..b64595c796 100644
--- a/trunk/src/app/srs_app_rtc_api.cpp
+++ b/trunk/src/app/srs_app_rtc_api.cpp
@@ -185,6 +185,14 @@ srs_error_t SrsGoApiRtcPlay::do_serve_http(ISrsHttpResponseWriter* w, ISrsHttpMe
             server_enabled, rtc_enabled, ruc.req_->vhost.c_str());
     }
 
+    // For RTMP to RTC, fail if disabled and RTMP is active, see https://github.com/ossrs/srs/issues/2728
+    if (!_srs_config->get_rtc_to_rtmp(ruc.req_->vhost)) {
+        SrsLiveSource* rtmp = _srs_sources->fetch(ruc.req_);
+        if (!rtmp->inactive()) {
+            return srs_error_new(ERROR_RTC_DISABLED, "Disabled rtmp_to_rtc of %s, see #2728", ruc.req_->vhost.c_str());
+        }
+    }
+
     // TODO: FIXME: When server enabled, but vhost disabled, should report error.
     SrsRtcConnection* session = NULL;
     if ((err = server_->create_session(&ruc, local_sdp, &session)) != srs_success) {
diff --git a/trunk/src/app/srs_app_source.hpp b/trunk/src/app/srs_app_source.hpp
index 33a48f580f..d1bf0b3dc3 100644
--- a/trunk/src/app/srs_app_source.hpp
+++ b/trunk/src/app/srs_app_source.hpp
@@ -448,7 +448,7 @@ class SrsLiveSourceManager : public ISrsHourGlass
     // @param h the event handler for source.
     // @param pps the matched source, if success never be NULL.
     virtual srs_error_t fetch_or_create(SrsRequest* r, ISrsLiveSourceHandler* h, SrsLiveSource** pps);
-private:
+public:
     // Get the exists source, NULL when not exists.
     // update the request and return the exists source.
     virtual SrsLiveSource* fetch(SrsRequest* r);
diff --git a/trunk/src/core/srs_core_version4.hpp b/trunk/src/core/srs_core_version4.hpp
index fd30d19129..2d2a72872f 100644
--- a/trunk/src/core/srs_core_version4.hpp
+++ b/trunk/src/core/srs_core_version4.hpp
@@ -9,6 +9,6 @@
 
 #define VERSION_MAJOR       4
 #define VERSION_MINOR       0
-#define VERSION_REVISION    214
+#define VERSION_REVISION    215
 
 #endif