From a4cf9f4834aab12e3b4e021de7a56dcab2ff480e Mon Sep 17 00:00:00 2001
From: nathan <nathan@dorkbox.com>
Date: Tue, 3 Apr 2018 15:53:01 +0200
Subject: [PATCH] Datagram session now checks if event loop is shutdown before
 trying to close

---
 src/io/netty/bootstrap/SessionManager.java | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/src/io/netty/bootstrap/SessionManager.java b/src/io/netty/bootstrap/SessionManager.java
index 5196c431..08720c93 100644
--- a/src/io/netty/bootstrap/SessionManager.java
+++ b/src/io/netty/bootstrap/SessionManager.java
@@ -124,16 +124,18 @@ class SessionManager extends ChannelInboundHandlerAdapter {
 
     @Override
     public
-    void channelInactive(final ChannelHandlerContext ctx) throws Exception {
-        super.channelInactive(ctx);
+    void channelInactive(final ChannelHandlerContext context) throws Exception {
+        super.channelInactive(context);
 
         // have to close all of the "fake" DatagramChannels as well. Each one will remove itself from the channel map.
 
         // We make a copy of this b/c of concurrent modification, in the event this is closed BEFORE the child-channels are closed
         ArrayList<DatagramSessionChannel> channels = new ArrayList<DatagramSessionChannel>(datagramChannels.values());
-        for (DatagramSessionChannel datagramSessionChannel : channels) {
-            if (datagramSessionChannel.isActive()) {
-                datagramSessionChannel.close();
+        for (DatagramSessionChannel channel : channels) {
+            if (channel.isActive() &&
+                !channel.eventLoop().isShutdown()) {
+
+                channel.close();
             }
         }
     }