From b31e5e1a15eab714996ef02fcc7421ab778d91c8 Mon Sep 17 00:00:00 2001
From: Walt Gribben <waltg@speakeasy.net>
Date: Tue, 9 May 2006 02:00:04 +0000
Subject: [PATCH] *** empty log message ***

svn path=/trunk/boinc/; revision=10115
---
 checkin_notes         |  8 ++++++++
 client/client_state.C | 10 ++++++++++
 2 files changed, 18 insertions(+)

diff --git a/checkin_notes b/checkin_notes
index b3986d6ae8..aa66895179 100755
--- a/checkin_notes
+++ b/checkin_notes
@@ -4540,3 +4540,11 @@ Charlie 8 May 2006
         
     api/
         x_opengl.C
+
+Walt  8 May 2006
+    - Bug fix:  DNS lookup when network was unavailable consumed all
+         available CPU.  Fix limits times thru loop and adds a short
+         sleep before breaking out of it.
+        
+    client/
+        client_state..C
diff --git a/client/client_state.C b/client/client_state.C
index ed887bbe72..2486af3c08 100644
--- a/client/client_state.C
+++ b/client/client_state.C
@@ -362,6 +362,7 @@ void CLIENT_STATE::do_io_or_sleep(double x) {
     struct timeval tv;
     now = dtime();
     double end_time = now + x;
+    int loops = 0;
 
     while (1) {
         curl_fds.zero();
@@ -387,6 +388,15 @@ void CLIENT_STATE::do_io_or_sleep(double x) {
 
         if (n==0) break;
 
+        // Limit number of times thru this loop.  Can get
+        // stuck in while loop, if network isn't available,
+        // DNS lookups tend to eat CPU cycles.
+        //
+        if (loops++ > 99) {
+            boinc_sleep(.01);
+            break;
+        }
+
         now = dtime();
         if (now > end_time) break;
         x = end_time - now;