diff --git a/README.md b/README.md
index d2c68b891..cdb19fb1b 100755
--- a/README.md
+++ b/README.md
@@ -342,6 +342,7 @@ Remark:
 
 ## History
 
+* v2.0, 2015-08-18, close [#454](https://github.com/simple-rtmp-server/srs/issues/454), support obs restart publish. 2.0.184
 * v2.0, 2015-08-14, use reduce_sequence_header for stream control.
 * v2.0, 2015-08-14, use send_min_interval for stream control. 2.0.183
 * v2.0, 2015-08-12, enable the SRS_PERF_TCP_NODELAY and add config tcp_nodelay. 2.0.182
diff --git a/trunk/configure b/trunk/configure
index d705c6ceb..f11cd25e7 100755
--- a/trunk/configure
+++ b/trunk/configure
@@ -508,10 +508,15 @@ if [ $SRS_EXPORT_LIBRTMP_PROJECT = NO ]; then
     else
         echo -e "${YELLOW}warning: without HLS support${BLACK}"
     fi
-    if [ $SRS_HDS = YES ]; then
-        echo -e "${GREEN}HDS is enabled${BLACK}"
+    if [ $SRS_STREAM_CASTER = YES ]; then
+        echo -e "${YELLOW}Experiment: StreamCaster is enabled${BLACK}"
     else
-        echo -e "${YELLOW}warning: without HDS support${BLACK}"
+        echo -e "${GREEN}note: without StreamCaster support${BLACK}"
+    fi
+    if [ $SRS_HDS = YES ]; then
+        echo -e "${YELLOW}Experiment: HDS is enabled${BLACK}"
+    else
+        echo -e "${GREEN}warning: without HDS support${BLACK}"
     fi
     if [ $SRS_NGINX = YES ]; then
         echo -e "${GREEN}Nginx http server is enabled${BLACK}"
diff --git a/trunk/src/app/srs_app_recv_thread.cpp b/trunk/src/app/srs_app_recv_thread.cpp
index e402643d4..e94b622dd 100644
--- a/trunk/src/app/srs_app_recv_thread.cpp
+++ b/trunk/src/app/srs_app_recv_thread.cpp
@@ -96,7 +96,7 @@ int SrsRecvThread::cycle()
         }
     
         if (ret != ERROR_SUCCESS) {
-            if (!srs_is_client_gracefully_close(ret)) {
+            if (!srs_is_client_gracefully_close(ret) && !srs_is_system_control_error(ret)) {
                 srs_error("thread process message failed. ret=%d", ret);
             }
     
diff --git a/trunk/src/app/srs_app_rtmp_conn.cpp b/trunk/src/app/srs_app_rtmp_conn.cpp
index f63456abb..43c3951a9 100755
--- a/trunk/src/app/srs_app_rtmp_conn.cpp
+++ b/trunk/src/app/srs_app_rtmp_conn.cpp
@@ -337,6 +337,16 @@ int SrsRtmpConn::service_cycle()
         }
     }
     
+    // set chunk size to larger.
+    // set the chunk size before any larger response greater than 128,
+    // to make OBS happy, @see https://github.com/simple-rtmp-server/srs/issues/454
+    int chunk_size = _srs_config->get_chunk_size(req->vhost);
+    if ((ret = rtmp->set_chunk_size(chunk_size)) != ERROR_SUCCESS) {
+        srs_error("set chunk_size=%d failed. ret=%d", chunk_size, ret);
+        return ret;
+    }
+    srs_info("set chunk_size=%d success", chunk_size);
+    
     // response the client connect ok.
     if ((ret = rtmp->response_connect_app(req, local_ip.c_str())) != ERROR_SUCCESS) {
         srs_error("response connect app failed. ret=%d", ret);
@@ -424,14 +434,6 @@ int SrsRtmpConn::stream_service_cycle()
     rtmp->set_recv_timeout(SRS_CONSTS_RTMP_RECV_TIMEOUT_US);
     rtmp->set_send_timeout(SRS_CONSTS_RTMP_SEND_TIMEOUT_US);
     
-    // set chunk size to larger.
-    int chunk_size = _srs_config->get_chunk_size(req->vhost);
-    if ((ret = rtmp->set_chunk_size(chunk_size)) != ERROR_SUCCESS) {
-        srs_error("set chunk_size=%d failed. ret=%d", chunk_size, ret);
-        return ret;
-    }
-    srs_info("set chunk_size=%d success", chunk_size);
-    
     // find a source to serve.
     SrsSource* source = SrsSource::fetch(req);
     if (!source) {
@@ -637,7 +639,7 @@ int SrsRtmpConn::do_playing(SrsSource* source, SrsConsumer* consumer, SrsQueueRe
         
         // quit when recv thread error.
         if ((ret = trd->error_code()) != ERROR_SUCCESS) {
-            if (!srs_is_client_gracefully_close(ret)) {
+            if (!srs_is_client_gracefully_close(ret) && !srs_is_system_control_error(ret)) {
                 srs_error("recv thread failed. ret=%d", ret);
             }
             return ret;
@@ -824,7 +826,7 @@ int SrsRtmpConn::do_publishing(SrsSource* source, SrsPublishRecvThread* trd)
 
         // check the thread error code.
         if ((ret = trd->error_code()) != ERROR_SUCCESS) {
-            if (!srs_is_client_gracefully_close(ret)) {
+            if (!srs_is_system_control_error(ret) && !srs_is_client_gracefully_close(ret)) {
                 srs_error("recv thread failed. ret=%d", ret);
             }
             return ret;
diff --git a/trunk/src/app/srs_app_thread.cpp b/trunk/src/app/srs_app_thread.cpp
index 0007df3ea..097758563 100644
--- a/trunk/src/app/srs_app_thread.cpp
+++ b/trunk/src/app/srs_app_thread.cpp
@@ -187,7 +187,7 @@ namespace internal {
             srs_info("thread %s on before cycle success");
             
             if ((ret = handler->cycle()) != ERROR_SUCCESS) {
-                if (!srs_is_client_gracefully_close(ret)) {
+                if (!srs_is_client_gracefully_close(ret) && !srs_is_system_control_error(ret)) {
                     srs_warn("thread %s cycle failed, ignored and retry, ret=%d", _name, ret);
                 }
                 goto failed;
diff --git a/trunk/src/core/srs_core.hpp b/trunk/src/core/srs_core.hpp
index d640f1deb..be9c02c4d 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       2
 #define VERSION_MINOR       0
-#define VERSION_REVISION    183
+#define VERSION_REVISION    184
 
 // server info.
 #define RTMP_SIG_SRS_KEY "SRS"
diff --git a/trunk/src/protocol/srs_rtmp_stack.cpp b/trunk/src/protocol/srs_rtmp_stack.cpp
index d3658999f..fce86ac5f 100644
--- a/trunk/src/protocol/srs_rtmp_stack.cpp
+++ b/trunk/src/protocol/srs_rtmp_stack.cpp
@@ -2924,7 +2924,9 @@ int SrsRtmpServer::fmle_unpublish(int stream_id, double unpublish_tid)
         pkt->data->set(StatusDescription, SrsAmf0Any::str("Stop publishing stream."));
         
         if ((ret = protocol->send_and_free_packet(pkt, stream_id)) != ERROR_SUCCESS) {
-            srs_error("send onFCUnpublish(NetStream.unpublish.Success) message failed. ret=%d", ret);
+            if (!srs_is_system_control_error(ret) && !srs_is_client_gracefully_close(ret)) {
+                srs_error("send onFCUnpublish(NetStream.unpublish.Success) message failed. ret=%d", ret);
+            }
             return ret;
         }
         srs_info("send onFCUnpublish(NetStream.unpublish.Success) message success.");
@@ -2933,7 +2935,9 @@ int SrsRtmpServer::fmle_unpublish(int stream_id, double unpublish_tid)
     if (true) {
         SrsFMLEStartResPacket* pkt = new SrsFMLEStartResPacket(unpublish_tid);
         if ((ret = protocol->send_and_free_packet(pkt, stream_id)) != ERROR_SUCCESS) {
-            srs_error("send FCUnpublish response message failed. ret=%d", ret);
+            if (!srs_is_system_control_error(ret) && !srs_is_client_gracefully_close(ret)) {
+                srs_error("send FCUnpublish response message failed. ret=%d", ret);
+            }
             return ret;
         }
         srs_info("send FCUnpublish response message success.");
@@ -2948,7 +2952,9 @@ int SrsRtmpServer::fmle_unpublish(int stream_id, double unpublish_tid)
         pkt->data->set(StatusClientId, SrsAmf0Any::str(RTMP_SIG_CLIENT_ID));
         
         if ((ret = protocol->send_and_free_packet(pkt, stream_id)) != ERROR_SUCCESS) {
-            srs_error("send onStatus(NetStream.Unpublish.Success) message failed. ret=%d", ret);
+            if (!srs_is_system_control_error(ret) && !srs_is_client_gracefully_close(ret)) {
+                srs_error("send onStatus(NetStream.Unpublish.Success) message failed. ret=%d", ret);
+            }
             return ret;
         }
         srs_info("send onStatus(NetStream.Unpublish.Success) message success.");