diff --git a/trunk/conf/full.conf b/trunk/conf/full.conf
index cab0cd054..a12061bbc 100644
--- a/trunk/conf/full.conf
+++ b/trunk/conf/full.conf
@@ -624,8 +624,9 @@ vhost with-hls.srs.com {
         # the timeout in seconds to dispose the hls,
         # dispose is to remove all hls files, m3u8 and ts files.
         # when timeout or server terminate, dispose hls.
-        # default: 300
-        hls_dispose     300;
+        # @remark 0 to disable dispose.
+        # default: 0
+        hls_dispose     0;
         # the max size to notify hls,
         # to read max bytes from ts of specified cdn network,
         # @remark only used when on_hls_notify is config.
diff --git a/trunk/src/app/srs_app_config.cpp b/trunk/src/app/srs_app_config.cpp
index 056f1efdd..082f2efda 100644
--- a/trunk/src/app/srs_app_config.cpp
+++ b/trunk/src/app/srs_app_config.cpp
@@ -3566,7 +3566,7 @@ int SrsConfig::get_hls_dispose(string vhost)
 {
     SrsConfDirective* conf = get_hls(vhost);
     
-    int DEFAULT = 300;
+    int DEFAULT = 0;
     
     if (!conf) {
         return DEFAULT;
diff --git a/trunk/src/app/srs_app_hls.cpp b/trunk/src/app/srs_app_hls.cpp
index f54b5df7f..7d522e7ab 100644
--- a/trunk/src/app/srs_app_hls.cpp
+++ b/trunk/src/app/srs_app_hls.cpp
@@ -1124,6 +1124,7 @@ int SrsHlsCache::reap_segment(string log_desc, SrsHlsMuxer* muxer, int64_t segme
 
 SrsHls::SrsHls()
 {
+    _req = NULL;
     source = NULL;
     handler = NULL;
     
@@ -1144,6 +1145,7 @@ SrsHls::SrsHls()
 
 SrsHls::~SrsHls()
 {
+    srs_freep(_req);
     srs_freep(codec);
     srs_freep(sample);
     srs_freep(jitter);
@@ -1160,6 +1162,14 @@ void SrsHls::dispose()
         on_unpublish();
     }
     
+    // only dispose hls when positive.
+    if (_req) {
+        int hls_dispose = _srs_config->get_hls_dispose(_req->vhost);
+        if (hls_dispose <= 0) {
+            return;
+        }
+    }
+    
     muxer->dispose();
 }
 
@@ -1212,7 +1222,8 @@ int SrsHls::on_publish(SrsRequest* req)
 {
     int ret = ERROR_SUCCESS;
     
-    _req = req;
+    srs_freep(_req);
+    _req = req->copy();
     
     // update the hls time, for hls_dispose.
     last_update_time = srs_get_system_time_ms();