From 5d4986c755526ad5d249ba96eb6213ce089a9c25 Mon Sep 17 00:00:00 2001
From: Sam Reis <sreis@atlassian.com>
Date: Fri, 4 Jul 2014 12:47:28 +1000
Subject: [PATCH] Fix server leaking events

Solves #6843.

Docker-DCO-1.1-Signed-off-by: Samuel Reis <srijs@airpost.net> (github: srijs)
---
 server/server.go | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/server/server.go b/server/server.go
index e9a2c93819..2bbada5a1d 100644
--- a/server/server.go
+++ b/server/server.go
@@ -2463,8 +2463,14 @@ func (srv *Server) LogEvent(action, id, from string) *utils.JSONMessage {
 
 func (srv *Server) AddEvent(jm utils.JSONMessage) {
 	srv.Lock()
-	defer srv.Unlock()
-	srv.events = append(srv.events, jm)
+	if len(srv.events) == cap(srv.events) {
+		// discard oldest event
+		copy(srv.events, srv.events[1:])
+		srv.events[len(srv.events)-1] = jm
+	} else {
+		srv.events = append(srv.events, jm)
+	}
+	srv.Unlock()
 }
 
 func (srv *Server) GetEvents() []utils.JSONMessage {