diff --git a/pinos/client/connection.c b/pinos/client/connection.c
index b5d490e62..bb38acec8 100644
--- a/pinos/client/connection.c
+++ b/pinos/client/connection.c
@@ -1216,10 +1216,6 @@ pinos_connection_parse_message (PinosConnection *conn,
       connection_parse_port_update (conn, message);
       break;
 
-    case PINOS_MESSAGE_PORT_STATUS_CHANGE:
-      pinos_log_warn ("implement iter of %d", conn->in.type);
-      break;
-
     case PINOS_MESSAGE_NODE_STATE_CHANGE:
       if (conn->in.size < sizeof (PinosMessageNodeStateChange))
         return false;
@@ -1410,10 +1406,6 @@ pinos_connection_add_message (PinosConnection  *conn,
       connection_add_port_update (conn, dest_id, message);
       break;
 
-    case PINOS_MESSAGE_PORT_STATUS_CHANGE:
-      p = connection_add_message (conn, dest_id, type, 0);
-      break;
-
     case PINOS_MESSAGE_NODE_STATE_CHANGE:
       p = connection_add_message (conn, dest_id, type, sizeof (PinosMessageNodeStateChange));
       memcpy (p, message, sizeof (PinosMessageNodeStateChange));
diff --git a/pinos/client/connection.h b/pinos/client/connection.h
index fb15edb3d..21722082a 100644
--- a/pinos/client/connection.h
+++ b/pinos/client/connection.h
@@ -65,8 +65,6 @@ typedef enum {
   PINOS_MESSAGE_NODE_UPDATE,
   PINOS_MESSAGE_PORT_UPDATE,
   PINOS_MESSAGE_NODE_STATE_CHANGE,
-
-  PINOS_MESSAGE_PORT_STATUS_CHANGE,
   PINOS_MESSAGE_NODE_EVENT,
 
   /* server to client */
@@ -229,8 +227,6 @@ typedef struct {
   SpaNodeState    state;
 } PinosMessageNodeStateChange;
 
-/* PINOS_MESSAGE_PORT_STATUS_CHANGE */
-
 /* PINOS_MESSAGE_NODE_EVENT */
 typedef struct {
   SpaNodeEvent *event;
diff --git a/pinos/client/context.c b/pinos/client/context.c
index 0189335df..fbaf41db6 100644
--- a/pinos/client/context.c
+++ b/pinos/client/context.c
@@ -543,6 +543,9 @@ pinos_context_destroy (PinosContext *context)
   pinos_log_debug ("context %p: destroy", context);
   pinos_signal_emit (&context->destroy_signal, context);
 
+  if (context->state != PINOS_CONTEXT_STATE_UNCONNECTED)
+    pinos_context_disconnect (context);
+
   spa_list_for_each_safe (stream, t1, &context->stream_list, link)
     pinos_stream_destroy (stream);
   spa_list_for_each_safe (proxy, t2, &context->proxy_list, link)
diff --git a/pinos/client/introspect.c b/pinos/client/introspect.c
index 8374e7eb3..4de186325 100644
--- a/pinos/client/introspect.c
+++ b/pinos/client/introspect.c
@@ -238,13 +238,23 @@ pinos_node_info_update (PinosNodeInfo       *info,
       free ((void*)info->name);
     info->name = update->name ? strdup (update->name) : NULL;
   }
-  if (update->change_mask & (1 << 1)) {
+  if (update->change_mask & (1 << 1))
+    info->max_inputs = update->max_inputs;
+  if (update->change_mask & (1 << 2))
+    info->n_input_formats = update->n_input_formats;
+
+  if (update->change_mask & (1 << 3))
+    info->max_outputs = update->max_outputs;
+  if (update->change_mask & (1 << 4))
+    info->n_output_formats = update->n_output_formats;
+
+  if (update->change_mask & (1 << 5)) {
     info->state = update->state;
     if (info->error)
       free ((void*)info->error);
     info->error = update->error ? strdup (update->error) : NULL;
   }
-  if (update->change_mask & (1 << 2)) {
+  if (update->change_mask & (1 << 6)) {
     if (info->props)
       pinos_spa_dict_destroy (info->props);
     info->props = pinos_spa_dict_copy (update->props);
diff --git a/pinos/client/introspect.h b/pinos/client/introspect.h
index bd7de68b9..73e623ccc 100644
--- a/pinos/client/introspect.h
+++ b/pinos/client/introspect.h
@@ -255,6 +255,14 @@ struct _PinosNodeInfo {
   uint32_t        id;
   uint64_t        change_mask;
   const char     *name;
+  unsigned int    max_inputs;
+  unsigned int    n_inputs;
+  unsigned int    n_input_formats;
+  SpaFormat     **input_formats;
+  unsigned int    max_outputs;
+  unsigned int    n_outputs;
+  unsigned int    n_output_formats;
+  SpaFormat     **output_formats;
   PinosNodeState  state;
   const char     *error;
   SpaDict        *props;
diff --git a/pinos/client/stream.c b/pinos/client/stream.c
index a008301c4..780ce9827 100644
--- a/pinos/client/stream.c
+++ b/pinos/client/stream.c
@@ -96,6 +96,26 @@ typedef struct
   int64_t last_monotonic;
 } PinosStreamImpl;
 
+static void
+clear_memid (MemId *mid)
+{
+  if (mid->ptr != NULL)
+    munmap (mid->ptr, mid->size + mid->offset);
+  mid->ptr = NULL;
+  close (mid->fd);
+}
+
+static void
+clear_mems (PinosStream *stream)
+{
+  PinosStreamImpl *impl = SPA_CONTAINER_OF (stream, PinosStreamImpl, this);
+  MemId *mid;
+
+  pinos_array_for_each (mid, &impl->mem_ids)
+    clear_memid (mid);
+  impl->mem_ids.size = 0;
+}
+
 static void
 clear_buffers (PinosStream *stream)
 {
@@ -104,7 +124,9 @@ clear_buffers (PinosStream *stream)
 
   pinos_array_for_each (bid, &impl->buffer_ids) {
     pinos_signal_emit (&stream->remove_buffer, stream, bid->id);
+    free (bid->buf);
     bid->buf = NULL;
+    bid->used = false;
   }
   impl->buffer_ids.size = 0;
   impl->in_order = true;
@@ -229,13 +251,19 @@ pinos_stream_destroy (PinosStream *stream)
 
   spa_list_remove (&stream->link);
 
+  if (impl->node_proxy)
+    pinos_signal_remove (&impl->node_proxy_destroy);
+
   if (impl->format)
     free (impl->format);
 
   if (stream->error)
     free (stream->error);
 
+  clear_buffers (stream);
   pinos_array_clear (&impl->buffer_ids);
+
+  clear_mems (stream);
   pinos_array_clear (&impl->mem_ids);
 
   if (stream->properties)
@@ -499,6 +527,10 @@ unhandle_socket (PinosStream *stream)
     pinos_loop_destroy_source (stream->context->loop, impl->rtsocket_source);
     impl->rtsocket_source = NULL;
   }
+  if (impl->timeout_source) {
+    pinos_loop_destroy_source (stream->context->loop, impl->timeout_source);
+    impl->timeout_source = NULL;
+  }
 }
 
 static void
@@ -540,7 +572,7 @@ handle_socket (PinosStream *stream, int rtfd)
   impl->rtsocket_source = pinos_loop_add_io (stream->context->loop,
                                              impl->rtfd,
                                              SPA_IO_IN | SPA_IO_ERR | SPA_IO_HUP,
-                                             false,
+                                             true,
                                              on_rtsocket_condition,
                                              stream);
 
@@ -691,6 +723,7 @@ stream_dispatch_func (void             *object,
       if (m) {
         pinos_log_debug ("update mem %u, fd %d, flags %d, off %zd, size %zd",
             p->mem_id, p->memfd, p->flags, p->offset, p->size);
+        clear_memid (m);
       } else {
         m = pinos_array_add (&impl->mem_ids, sizeof (MemId));
         pinos_log_debug ("add mem %u, fd %d, flags %d, off %zd, size %zd",
@@ -719,12 +752,11 @@ stream_dispatch_func (void             *object,
 
         MemId *mid = find_mem (stream, p->buffers[i].mem_id);
         if (mid == NULL) {
-          pinos_log_warn ("unknown memory id %u", mid->id);
+          pinos_log_warn ("unknown memory id %u", p->buffers[i].mem_id);
           continue;
         }
 
         if (mid->ptr == NULL) {
-          //mid->ptr = mmap (NULL, mid->size, PROT_READ | PROT_WRITE, MAP_SHARED, mid->fd, mid->offset);
           mid->ptr = mmap (NULL, mid->size + mid->offset, PROT_READ | PROT_WRITE, MAP_SHARED, mid->fd, 0);
           if (mid->ptr == MAP_FAILED) {
             mid->ptr = NULL;
@@ -794,6 +826,7 @@ stream_dispatch_func (void             *object,
       if (p->n_buffers) {
         add_state_change (stream, SPA_NODE_STATE_PAUSED, false);
       } else {
+        clear_mems (stream);
         add_state_change (stream, SPA_NODE_STATE_READY, false);
       }
       add_async_complete (stream, p->seq, SPA_RESULT_OK, true);
@@ -855,6 +888,7 @@ on_node_proxy_destroy (PinosListener *listener,
 
   impl->disconnecting = false;
   impl->node_proxy = NULL;
+  pinos_signal_remove (&impl->node_proxy_destroy);
   stream_set_state (this, PINOS_STREAM_STATE_UNCONNECTED, NULL);
 }
 
diff --git a/pinos/gst/gstpinossrc.c b/pinos/gst/gstpinossrc.c
index 4fbd16391..372d50bfd 100644
--- a/pinos/gst/gstpinossrc.c
+++ b/pinos/gst/gstpinossrc.c
@@ -458,9 +458,23 @@ on_remove_buffer (PinosListener *listener,
 
   GST_LOG_OBJECT (pinossrc, "remove buffer");
   buf = g_hash_table_lookup (pinossrc->buf_ids, GINT_TO_POINTER (id));
-  GST_MINI_OBJECT_CAST (buf)->dispose = NULL;
+  if (buf) {
+    GList *walk;
 
-  g_hash_table_remove (pinossrc->buf_ids, GINT_TO_POINTER (id));
+    GST_MINI_OBJECT_CAST (buf)->dispose = NULL;
+
+    walk = pinossrc->queue.head;
+    while (walk) {
+      GList *next = walk->next;
+
+      if (walk->data == buf) {
+        gst_buffer_unref (buf);
+        g_queue_delete_link (&pinossrc->queue, walk);
+      }
+      walk = next;
+    }
+    g_hash_table_remove (pinossrc->buf_ids, GINT_TO_POINTER (id));
+  }
 }
 
 static void
@@ -474,12 +488,12 @@ on_new_buffer (PinosListener *listener,
   SpaMetaHeader *h;
   guint i;
 
-  GST_LOG_OBJECT (pinossrc, "got new buffer");
   buf = g_hash_table_lookup (pinossrc->buf_ids, GINT_TO_POINTER (id));
   if (buf == NULL) {
     g_warning ("unknown buffer %d", id);
     return;
   }
+  GST_LOG_OBJECT (pinossrc, "got new buffer %p", buf);
 
   data = gst_mini_object_get_qdata (GST_MINI_OBJECT_CAST (buf),
                                   process_mem_data_quark);
@@ -500,6 +514,7 @@ on_new_buffer (PinosListener *listener,
     mem->offset = d->chunk->offset + data->offset;
     mem->size = d->chunk->size;
   }
+  gst_buffer_ref (buf);
   g_queue_push_tail (&pinossrc->queue, buf);
 
   pinos_thread_main_loop_signal (pinossrc->main_loop, FALSE);
@@ -904,6 +919,7 @@ gst_pinos_src_create (GstPushSrc * psrc, GstBuffer ** buffer)
       goto streaming_stopped;
 
     *buffer = g_queue_pop_head (&pinossrc->queue);
+    GST_DEBUG ("popped buffer %p", *buffer);
     if (*buffer != NULL)
       break;
 
@@ -1074,6 +1090,8 @@ gst_pinos_src_close (GstPinosSrc * pinossrc)
 
   pinos_thread_main_loop_stop (pinossrc->main_loop);
 
+  g_hash_table_remove_all (pinossrc->buf_ids);
+
   pinos_stream_destroy (pinossrc->stream);
   pinossrc->stream = NULL;
 
diff --git a/pinos/server/client-node.c b/pinos/server/client-node.c
index c6d14bf8f..d53d293ee 100644
--- a/pinos/server/client-node.c
+++ b/pinos/server/client-node.c
@@ -803,50 +803,6 @@ spa_proxy_node_port_alloc_buffers (SpaNode         *node,
   return SPA_RESULT_NOT_IMPLEMENTED;
 }
 
-#if 0
-static void
-copy_meta_in (SpaProxy *this, SpaProxyPort *port, uint32_t buffer_id)
-{
-  ProxyBuffer *b = &port->buffers[buffer_id];
-  unsigned int i;
-
-  for (i = 0; i < b->outbuf->n_metas; i++) {
-    SpaMeta *sm = &b->buffer.metas[i];
-    SpaMeta *dm = &b->outbuf->metas[i];
-    memcpy (dm->data, sm->data, dm->size);
-  }
-  for (i = 0; i < b->outbuf->n_datas; i++) {
-    b->outbuf->datas[i].size = b->buffer.datas[i].size;
-    if (b->outbuf->datas[i].type == SPA_DATA_TYPE_MEMPTR) {
-      spa_log_info (this->log, "memcpy in %zd", b->buffer.datas[i].size);
-      memcpy (b->outbuf->datas[i].data, b->datas[i].data, b->buffer.datas[i].size);
-    }
-  }
-}
-#endif
-
-#if 0
-static void
-copy_meta_out (SpaProxy *this, SpaProxyPort *port, uint32_t buffer_id)
-{
-  ProxyBuffer *b = &port->buffers[buffer_id];
-  unsigned int i;
-
-  for (i = 0; i < b->outbuf->n_metas; i++) {
-    SpaMeta *sm = &b->outbuf->metas[i];
-    SpaMeta *dm = &b->buffer.metas[i];
-    memcpy (dm->data, sm->data, dm->size);
-  }
-  for (i = 0; i < b->outbuf->n_datas; i++) {
-    b->buffer.datas[i].size = b->outbuf->datas[i].size;
-    if (b->datas[i].type == SPA_DATA_TYPE_MEMPTR) {
-      spa_log_info (this->log, "memcpy out %zd", b->outbuf->datas[i].size);
-      memcpy (b->datas[i].data, b->outbuf->datas[i].data, b->outbuf->datas[i].size);
-    }
-  }
-}
-#endif
-
 static SpaResult
 spa_proxy_node_port_reuse_buffer (SpaNode         *node,
                                   uint32_t         port_id,
@@ -1011,12 +967,6 @@ client_node_dispatch_func (void             *object,
       break;
     }
 
-    case PINOS_MESSAGE_PORT_STATUS_CHANGE:
-    {
-      spa_log_warn (this->log, "proxy %p: command not implemented %d", this, type);
-      break;
-    }
-
     case PINOS_MESSAGE_NODE_STATE_CHANGE:
     {
       PinosMessageNodeStateChange *sc = message;
diff --git a/pinos/server/node.c b/pinos/server/node.c
index 642e92d1a..b5b7c45d6 100644
--- a/pinos/server/node.c
+++ b/pinos/server/node.c
@@ -277,8 +277,6 @@ on_node_event (SpaNode *node, SpaNodeEvent *event, void *user_data)
       int i;
       bool processed = false;
 
-//      pinos_log_debug ("node %p: need input", this);
-
       for (i = 0; i < this->transport->area->n_inputs; i++) {
         PinosLink *link;
         PinosPort *inport, *outport;
@@ -319,8 +317,6 @@ on_node_event (SpaNode *node, SpaNodeEvent *event, void *user_data)
       int i;
       bool processed = false;
 
-//      pinos_log_debug ("node %p: have output", this);
-
       for (i = 0; i < this->transport->area->n_outputs; i++) {
         PinosLink *link;
         PinosPort *inport, *outport;
@@ -346,6 +342,12 @@ on_node_event (SpaNode *node, SpaNodeEvent *event, void *user_data)
           if ((res = spa_node_process_input (inport->node->node)) < 0)
             pinos_log_warn ("node %p: got process input %d", inport->node, res);
         }
+
+        if ((res = spa_node_port_reuse_buffer (this->node,
+                                               outport->port_id,
+                                               po->buffer_id)) < 0)
+          pinos_log_warn ("node %p: error reuse buffer: %d", this, res);
+
         po->buffer_id = SPA_ID_INVALID;
       }
       if (processed) {
@@ -355,25 +357,8 @@ on_node_event (SpaNode *node, SpaNodeEvent *event, void *user_data)
       break;
     }
     case SPA_NODE_EVENT_TYPE_REUSE_BUFFER:
-    {
-      SpaResult res;
-      SpaNodeEventReuseBuffer *rb = (SpaNodeEventReuseBuffer *) event;
-      PinosPort *port = this->input_port_map[rb->port_id];
-      PinosLink *link;
-
-//      pinos_log_debug ("node %p: reuse buffer %u", this, rb->buffer_id);
-
-      spa_list_for_each (link, &port->rt.links, rt.input_link) {
-        if (link->rt.input == NULL || link->rt.output == NULL)
-          continue;
-
-        if ((res = spa_node_port_reuse_buffer (link->rt.output->node->node,
-                                               link->rt.output->port_id,
-                                               rb->buffer_id)) < 0)
-          pinos_log_warn ("node %p: error reuse buffer: %d", node, res);
-      }
       break;
-    }
+
     case SPA_NODE_EVENT_TYPE_REQUEST_CLOCK_UPDATE:
       send_clock_update (this);
       break;
@@ -436,6 +421,10 @@ node_bind_func (PinosGlobal *global,
   info.id = global->id;
   info.change_mask = ~0;
   info.name = this->name;
+  info.max_inputs = this->transport->area->max_inputs;
+  info.n_inputs = this->transport->area->n_inputs;
+  info.max_outputs = this->transport->area->max_outputs;
+  info.n_outputs = this->transport->area->n_outputs;
   info.state = this->state;
   info.error = this->error;
   info.props = this->properties ? &this->properties->dict : NULL;
diff --git a/pinos/server/node.h b/pinos/server/node.h
index 535abba13..1fd0ea8f0 100644
--- a/pinos/server/node.h
+++ b/pinos/server/node.h
@@ -50,8 +50,6 @@ struct _PinosNode {
   SpaList      link;
   PinosGlobal *global;
 
-  bool unlinking;
-
   char *name;
   PinosProperties *properties;
   PinosNodeState state;
diff --git a/pinos/server/port.c b/pinos/server/port.c
index 6c2f7c72d..fd5d1bd42 100644
--- a/pinos/server/port.c
+++ b/pinos/server/port.c
@@ -282,11 +282,6 @@ do_remove_link (SpaLoop        *loop,
     link->rt.output = NULL;
   }
 
-#if 0
-  if (spa_list_is_empty (&port->rt.links))
-    pinos_port_pause (port);
-#endif
-
   res = pinos_loop_invoke (this->core->main_loop->loop,
                            do_remove_link_done,
                            seq,
diff --git a/pinos/tools/pinos-monitor.c b/pinos/tools/pinos-monitor.c
index 97e39bbe8..46014799b 100644
--- a/pinos/tools/pinos-monitor.c
+++ b/pinos/tools/pinos-monitor.c
@@ -111,12 +111,14 @@ dump_node_info (PinosContext        *c,
   printf ("\ttype: %s\n", PINOS_NODE_URI);
   if (data->print_all) {
     printf ("%c\tname: \"%s\"\n", MARK_CHANGE (0), info->name);
-    printf ("%c\tstate: \"%s\"", MARK_CHANGE (1), pinos_node_state_as_string (info->state));
+    printf ("%c\tinputs: %u/%u\n", MARK_CHANGE (1), info->n_inputs, info->max_inputs);
+    printf ("%c\toutputs: %u/%u\n", MARK_CHANGE (2), info->n_outputs, info->max_outputs);
+    printf ("%c\tstate: \"%s\"", MARK_CHANGE (3), pinos_node_state_as_string (info->state));
     if (info->state == PINOS_NODE_STATE_ERROR && info->error)
       printf (" \"%s\"\n", info->error);
     else
       printf ("\n");
-    print_properties (info->props, MARK_CHANGE (2));
+    print_properties (info->props, MARK_CHANGE (4));
   }
 }
 
diff --git a/spa/tools/spa-inspect.c b/spa/tools/spa-inspect.c
index f727b2ce0..efbdedd5d 100644
--- a/spa/tools/spa-inspect.c
+++ b/spa/tools/spa-inspect.c
@@ -26,6 +26,7 @@
 #include <spa/id-map.h>
 #include <spa/log.h>
 #include <spa/node.h>
+#include <spa/loop.h>
 #include <lib/debug.h>
 #include <lib/mapper.h>
 
@@ -37,10 +38,11 @@ typedef struct {
 typedef struct {
   URI uri;
 
-  SpaSupport support[2];
+  SpaSupport support[4];
   unsigned int n_support;
   SpaIDMap *map;
   SpaLog *log;
+  SpaLoop loop;
 } AppData;
 
 static void
@@ -154,6 +156,22 @@ inspect_factory (AppData *data, const SpaHandleFactory *factory)
   }
 }
 
+static SpaResult
+do_add_source (SpaLoop   *loop,
+               SpaSource *source)
+{
+  return SPA_RESULT_OK;
+}
+static SpaResult
+do_update_source (SpaSource  *source)
+{
+  return SPA_RESULT_OK;
+}
+static void
+do_remove_source (SpaSource  *source)
+{
+}
+
 int
 main (int argc, char *argv[])
 {
@@ -170,12 +188,20 @@ main (int argc, char *argv[])
 
   data.map = spa_id_map_get_default();
   data.log = NULL;
+  data.loop.size = sizeof (SpaLoop);
+  data.loop.add_source = do_add_source;
+  data.loop.update_source = do_update_source;
+  data.loop.remove_source = do_remove_source;
 
   data.support[0].uri = SPA_ID_MAP_URI;
   data.support[0].data = data.map;
   data.support[1].uri = SPA_LOG_URI;
   data.support[1].data = data.log;
-  data.n_support = 2;
+  data.support[2].uri = SPA_LOOP__MainLoop;
+  data.support[2].data = &data.loop;
+  data.support[3].uri = SPA_LOOP__DataLoop;
+  data.support[3].data = &data.loop;
+  data.n_support = 4;
 
   data.uri.node = spa_id_map_get_id (data.map, SPA_NODE_URI);
   data.uri.clock = spa_id_map_get_id (data.map, SPA_CLOCK_URI);