diff -r 74d21dd5fd5d -r 8b85c5face66 src/server/daemon/sessionhandler.c
--- a/src/server/daemon/sessionhandler.c	Sat Jan 21 15:31:17 2017 +0100
+++ b/src/server/daemon/sessionhandler.c	Sat Jan 21 16:40:59 2017 +0100
@@ -42,6 +42,7 @@
 typedef struct _event_http_io {
     HTTPRequest *request;
     HttpParser  *parser;
+    int         error;
 } EventHttpIO;
 
 
@@ -212,6 +213,7 @@
     }
     io->request = request;
     io->parser  = parser;
+    io->error = 0;
     
     /*
      * to start the request handling, we begin with a poll on the socket,
@@ -222,6 +224,7 @@
     event_handler_t *ev = ((EventSessionHandler*)handler)->eventhandler;
     
     event_t *event = malloc(sizeof(event_t));
+    ZERO(event, sizeof(event_t));
     event->fn = evt_request_input;
     event->finish = evt_request_finish;
     event->cookie = io;
@@ -263,6 +266,7 @@
         }
         
         event->finish = evt_request_error;
+        io->error = 1;
         return 0;
     }
     //fwrite(buf->inbuf + buf->pos, 1, r, stdout);
@@ -274,6 +278,7 @@
         // parse error
         fatal_error(request, 400);
         event->finish = evt_request_error;
+        io->error = 2;
         return 0;
     } else if(state == 1) {
         /*
@@ -294,6 +299,7 @@
     if (fcntl(request->connection->fd, F_SETFL, flags & ~O_NONBLOCK) != 0) {
         // just close the connection if fcntl fails
         event->finish = evt_request_error;
+        io->error = 3;
         return 0;
     }
      
@@ -332,11 +338,15 @@
     return 0;
 }
 
-int evt_request_error(event_handler_t *h, event_t *event) {
+int evt_request_error(event_handler_t *h, event_t *event) { 
     EventHttpIO *io = event->cookie;
     HttpParser  *parser  = io->parser;
     HTTPRequest *request = io->request;
     
+    if(event->error) {
+        log_ereport(LOG_VERBOSE, "sessionhandler http io error: %d", io->error);
+    }
+    
     free(request->netbuf->inbuf);
     free(request->netbuf);