Make the DNS cache timeout configurable.

In containerized environments, DNS is simulated. It can change several
times per second as containers move around. The hardcoded timeout was
too long for a container environment.

3 files changed, 8 insertions, 3 deletions

diff --git a/OpenSim/Region/Application/Application.cs b/OpenSim/Region/Application/Application.cs
index e4c3329..7c3b6c5 100644
--- a/OpenSim/Region/Application/Application.cs
+++ b/OpenSim/Region/Application/Application.cs
@@ -84,7 +84,7 @@ namespace OpenSim
                 ServicePointManager.DefaultConnectionLimit = 12;
             }
 
-            try { ServicePointManager.DnsRefreshTimeout = 300000; } catch { }
+            try { ServicePointManager.DnsRefreshTimeout = 5000; } catch { }
             ServicePointManager.Expect100Continue = false;
             ServicePointManager.UseNagleAlgorithm = false;
 
diff --git a/OpenSim/Region/Application/OpenSim.cs b/OpenSim/Region/Application/OpenSim.cs
index fcc8717..ee4ddf4 100644
--- a/OpenSim/Region/Application/OpenSim.cs
+++ b/OpenSim/Region/Application/OpenSim.cs
@@ -37,6 +37,7 @@ using System.Runtime;
 using System.Text;
 using System.Text.RegularExpressions;
 using System.Timers;
+using System.Net;
 using log4net;
 using NDesk.Options;
 using Nini.Config;
@@ -119,6 +120,9 @@ namespace OpenSim
                 stpMinThreads = startupConfig.GetInt("MinPoolThreads", 2 );
                 stpMaxThreads = startupConfig.GetInt("MaxPoolThreads", 25);
                 m_consolePrompt = startupConfig.GetString("ConsolePrompt", @"Region (\R) ");
+
+                int dnsTimeout = startupConfig.GetInt("DnsTimeout", 30000);
+                try { ServicePointManager.DnsRefreshTimeout = dnsTimeout; } catch { }
             }
 
             if (Util.FireAndForgetMethod == FireAndForgetMethod.SmartThreadPool)
diff --git a/OpenSim/Server/ServerMain.cs b/OpenSim/Server/ServerMain.cs
index 09f6920..c180ca6 100644
--- a/OpenSim/Server/ServerMain.cs
+++ b/OpenSim/Server/ServerMain.cs
@@ -85,8 +85,6 @@ namespace OpenSim.Server
             ServicePointManager.UseNagleAlgorithm = false;
             ServicePointManager.ServerCertificateValidationCallback = ValidateServerCertificate;
 
-            try { ServicePointManager.DnsRefreshTimeout = 300000; } catch { }
-
             m_Server = new HttpServerBase("R.O.B.U.S.T.", args);
 
             string registryLocation;
@@ -98,6 +96,9 @@ namespace OpenSim.Server
                 throw new Exception("Configuration error");
             }
 
+            int dnsTimeout = serverConfig.GetInt("DnsTimeout", 30000);
+            try { ServicePointManager.DnsRefreshTimeout = dnsTimeout; } catch { }
+
             m_NoVerifyCertChain = serverConfig.GetBoolean("NoVerifyCertChain", m_NoVerifyCertChain);
             m_NoVerifyCertHostname = serverConfig.GetBoolean("NoVerifyCertHostname", m_NoVerifyCertHostname);