Merge -c 1295314 from trunk to branch-0.23.2 to fix MAPREDUCE-3706. Fix circular redirect error in job-attempts page.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.23.2@1295316 13f79535-47bb-0310-9956-ffa450edef68

hadoop-mapreduce-project/CHANGES.txt

@@ -109,6 +109,9 @@ Release 0.23.2 - UNRELEASED
     MAPREDUCE-3903. Add support for mapreduce admin users. (Thomas Graves via
     sseth)
 
+    MAPREDUCE-3706. Fix circular redirect error in job-attempts page. (bobby
+    via acmurthy)
+
 Release 0.23.1 - 2012-02-17
 
   INCOMPATIBLE CHANGES

hadoop-mapreduce-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-web-proxy/src/main/java/org/apache/hadoop/yarn/server/webproxy/WebAppProxyServlet.java

@@ -38,7 +38,9 @@ import javax.servlet.http.HttpServletResponse;
 import org.apache.commons.httpclient.Header;
 import org.apache.commons.httpclient.HttpClient;
 import org.apache.commons.httpclient.HttpMethod;
+import org.apache.commons.httpclient.cookie.CookiePolicy;
 import org.apache.commons.httpclient.methods.GetMethod;
+import org.apache.commons.httpclient.params.HttpClientParams;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.apache.hadoop.io.IOUtils;
@@ -124,7 +126,10 @@ public class WebAppProxyServlet extends HttpServlet {
       HttpServletResponse resp, URI link,Cookie c) throws IOException {
     org.apache.commons.httpclient.URI uri = 
       new org.apache.commons.httpclient.URI(link.toString(), false);
-    HttpClient client = new HttpClient();
+    HttpClientParams params = new HttpClientParams();
+    params.setCookiePolicy(CookiePolicy.BROWSER_COMPATIBILITY);
+    params.setBooleanParameter(HttpClientParams.ALLOW_CIRCULAR_REDIRECTS, true);
+    HttpClient client = new HttpClient(params);
     HttpMethod method = new GetMethod(uri.getEscapedURI());
 
     @SuppressWarnings("unchecked")