From 4edebccf63720f0e4aef7ea78fcc37d175b93de7 Mon Sep 17 00:00:00 2001
From: Vincent Lucas <chenzo@jitsi.org>
Date: Tue, 14 May 2013 11:15:17 +0200
Subject: [PATCH] Clears the default DNS cache when supplied records for
 primary server changed.

---
 .../impl/protocol/jabber/FailoverConnectionMonitor.java  | 3 +++
 src/net/java/sip/communicator/util/NetworkUtils.java     | 9 +++++++++
 2 files changed, 12 insertions(+)

diff --git a/src/net/java/sip/communicator/impl/protocol/jabber/FailoverConnectionMonitor.java b/src/net/java/sip/communicator/impl/protocol/jabber/FailoverConnectionMonitor.java
index e3293dfca..ac0abc759 100644
--- a/src/net/java/sip/communicator/impl/protocol/jabber/FailoverConnectionMonitor.java
+++ b/src/net/java/sip/communicator/impl/protocol/jabber/FailoverConnectionMonitor.java
@@ -242,6 +242,9 @@ public void run()
                 if(isConnectedToPrimary(currentRecords))
                     return;
 
+                // Clear DNS cache.
+                NetworkUtils.clearDefaultDNSCache();
+
                 SRVRecord srv = getPrimaryServerRecord(currentRecords);
 
                 ConnectionConfiguration confConn = new ConnectionConfiguration(
diff --git a/src/net/java/sip/communicator/util/NetworkUtils.java b/src/net/java/sip/communicator/util/NetworkUtils.java
index 90923ec5d..5e885895f 100644
--- a/src/net/java/sip/communicator/util/NetworkUtils.java
+++ b/src/net/java/sip/communicator/util/NetworkUtils.java
@@ -1462,4 +1462,13 @@ private static void moveSelectedSRVRecord(
             }
         }
     }
+
+    /**
+     * Clears the default DNS cache.
+     */
+    public static void clearDefaultDNSCache()
+    {
+        Cache defaultCache = Lookup.getDefaultCache(DClass.IN);
+        defaultCache.clearCache();
+    }
 }