[Mono-bugs] [Bug 75239][Maj] Changed - DNS.GetHostName() and huge number of threads

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Changed by bmaurer at users.sf.net.

http://bugzilla.ximian.com/show_bug.cgi?id=75239

--- shadow/75239	2005-06-20 03:19:50.000000000 -0400
+++ shadow/75239.tmp.376	2005-06-29 18:26:27.000000000 -0400
@@ -1,16 +1,16 @@
 Bug#: 75239
-Product: Mono: Class Libraries
+Product: Mono: Runtime
 Version: 1.0
 OS: GNU/Linux [Other]
 OS Details: Linux skif 2.4.27 #1 SMP Thu Apr 14 15:25:11 MSD 2005 i686 athlon i386 GNU/Linux
 Status: NEW   
 Resolution: 
 Severity: Unknown
-Priority: Normal
-Component: System
+Priority: Major
+Component: io-layer
 AssignedTo: dick at ximian.com                            
 ReportedBy: vguzev at yandex.ru               
 QAContact: mono-bugs at ximian.com
 TargetMilestone: ---
 URL: 
 Cc: 
@@ -115,6 +115,38 @@
 machine in order to get the same error...
 
 ------- Additional Comments From vguzev at yandex.ru  2005-06-20 03:19 -------
 By the way, methods of DNS class such as GetHostName and 
 GetHostByName often hang on when I try to call them simultaneously on 
 different machines (more than 10) in multiple threads.
+
+------- Additional Comments From bmaurer at users.sf.net  2005-06-29 18:26 -------
+I had an easier time reproducing with this:
+
+using System;
+using System.Threading;
+using System.Net;
+
+class TestDNS {
+        static void X2 ()
+        {
+                for (int i = 0; i < 1000; i ++)
+                        Dns.GetHostName();
+                Console.Write ('.');
+        }
+
+        static void X1 ()
+        {
+                new Thread (X2).Start ();
+                new Thread (X2).Start ();
+        }
+
+        static void Main ()
+        {
+                for (int i = 0; i < 3000; i++ )
+                        new Thread (X1).Start ();
+        }
+}
+
+I get hangs and NREs pretty frequently on the smp box here. I had a
+harder time reproducing it on my box, but it is only a HT box, so
+maybe thats not good enough.