* lib/resolv.rb (Resolv::DNS): retry IO.select for premature wakeup.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@33584 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 6 insertions, 3 deletions

diff --git a/lib/resolv.rb b/lib/resolv.rb
index 6b4e06ad9d..b38c42ab3f 100644
--- a/lib/resolv.rb
+++ b/lib/resolv.rb
@@ -657,16 +657,19 @@ class Resolv
       end
 
       def request(sender, tout)
-        timelimit = Time.now + tout
+        start = Time.now
+        timelimit = start + tout
         sender.send
         while true
-          now = Time.now
-          timeout = timelimit - now
+          before_select = Time.now
+          timeout = timelimit - before_select
           if timeout <= 0
             raise ResolvTimeout
           end
           select_result = IO.select(@socks, nil, nil, timeout)
           if !select_result
+            after_select = Time.now
+            next if after_select < timelimit
             raise ResolvTimeout
           end
           begin