for #474, always release publish for source.

@@ -343,6 +343,7 @@ Remark:
 
 ## History
 
+* v2.0, 2015-09-14, for [#474][bug #474] always release publish for source.
 * v2.0, 2015-09-14, for [#458][bug #458] http hooks use source thread cid. 2.0.188
 * v2.0, 2015-09-14, for [#475][bug #475] fix http hooks crash for st context switch. 2.0.187
 * v2.0, 2015-09-09, support reload utc_time. 2.0.186
@@ -1026,6 +1027,7 @@ Winlin
 [bug #133]: https://github.com/simple-rtmp-server/srs/issues/133
 [bug #92]: https://github.com/simple-rtmp-server/srs/issues/92
 [bug #380]: https://github.com/simple-rtmp-server/srs/issues/380
+[bug #474]: https://github.com/simple-rtmp-server/srs/issues/474
 [bug #475]: https://github.com/simple-rtmp-server/srs/issues/475
 [bug #458]: https://github.com/simple-rtmp-server/srs/issues/458
 [bug #454]: https://github.com/simple-rtmp-server/srs/issues/454

@@ -834,9 +834,13 @@ int SrsRtmpConn::publishing(SrsSource* source)
 
         // stop isolate recv thread
         trd.stop();
+    }
     
+    // whatever the acquire publish, always release publish.
+    // when the acquire error in the midlle-way, the publish state changed,
+    // but failed, so we must cleanup it.
+    // @see https://github.com/simple-rtmp-server/srs/issues/474
     release_publish(source, vhost_is_edge);
-    }
 
     http_hooks_on_unpublish();
 
@@ -944,10 +948,12 @@ int SrsRtmpConn::acquire_publish(SrsSource* source, bool is_edge)
     if (is_edge) {
         if ((ret = source->on_edge_start_publish()) != ERROR_SUCCESS) {
             srs_error("notice edge start publish stream failed. ret=%d", ret);
+            return ret;
         }        
     } else {
         if ((ret = source->on_publish()) != ERROR_SUCCESS) {
             srs_error("notify publish failed. ret=%d", ret);
+            return ret;
         }
     }
 

@@ -2066,6 +2066,7 @@ int SrsSource::on_publish()
     }
     SrsStatistic* stat = SrsStatistic::instance();
     stat->on_stream_publish(_req, _source_id);
+    
     return ret;
 }
 

@@ -217,6 +217,8 @@ namespace internal {
         
         handler->on_thread_stop();
         srs_info("thread %s cycle finished", _name);
+        
+        // TODO: FIXME: when thread terminated normally, set the tid to NULL.
     }
     
     void* SrsThread::thread_fun(void* arg)