diff --git a/CHANGES.txt b/CHANGES.txt
index 98a1419d59b..f5ad14f7b92 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -425,6 +425,7 @@ Bug Fixes
 50. SOLR-1242: Human readable JVM info from system handler does integer cutoff rounding, even when dealing
                with GB. Fixed to round to one decimal place. (Jay Hill, Mark Miller)
 
+51. SOLR-1243: Admin RequestHandlers should not be cached over HTTP. (Mark Miller)
 
 Other Changes
 ----------------------
diff --git a/src/java/org/apache/solr/handler/admin/CoreAdminHandler.java b/src/java/org/apache/solr/handler/admin/CoreAdminHandler.java
index 7c7e00d889f..018cae7ff8d 100644
--- a/src/java/org/apache/solr/handler/admin/CoreAdminHandler.java
+++ b/src/java/org/apache/solr/handler/admin/CoreAdminHandler.java
@@ -166,6 +166,7 @@ public class CoreAdminHandler extends RequestHandlerBase {
       cores.persist();
       rsp.add("saved", cores.getConfigFile().getAbsolutePath());
     }
+    rsp.setHttpCaching(false);
   }
 
   protected boolean handleMergeAction(SolrQueryRequest req, SolrQueryResponse rsp) throws IOException {
diff --git a/src/java/org/apache/solr/handler/admin/LukeRequestHandler.java b/src/java/org/apache/solr/handler/admin/LukeRequestHandler.java
index 1551d2f457f..4ad864ef152 100644
--- a/src/java/org/apache/solr/handler/admin/LukeRequestHandler.java
+++ b/src/java/org/apache/solr/handler/admin/LukeRequestHandler.java
@@ -149,6 +149,7 @@ public class LukeRequestHandler extends RequestHandlerBase
     info.add( "key", getFieldFlagsKey() );
     info.add( "NOTE", "Document Frequency (df) is not updated when a document is marked for deletion.  df values include deleted documents." ); 
     rsp.add( "info", info );
+    rsp.setHttpCaching(false);
   }
 
   
diff --git a/src/java/org/apache/solr/handler/admin/PluginInfoHandler.java b/src/java/org/apache/solr/handler/admin/PluginInfoHandler.java
index b40f2b81e46..e345439b52c 100644
--- a/src/java/org/apache/solr/handler/admin/PluginInfoHandler.java
+++ b/src/java/org/apache/solr/handler/admin/PluginInfoHandler.java
@@ -49,6 +49,7 @@ public class PluginInfoHandler extends RequestHandlerBase
     
     boolean stats = params.getBool( "stats", false );
     rsp.add( "plugins", getSolrInfoBeans( req.getCore(), stats ) );
+    rsp.setHttpCaching(false);
   }
   
   private static SimpleOrderedMap<Object> getSolrInfoBeans( SolrCore core, boolean stats )
diff --git a/src/java/org/apache/solr/handler/admin/PropertiesRequestHandler.java b/src/java/org/apache/solr/handler/admin/PropertiesRequestHandler.java
index 85f35e59384..4bb1199824a 100644
--- a/src/java/org/apache/solr/handler/admin/PropertiesRequestHandler.java
+++ b/src/java/org/apache/solr/handler/admin/PropertiesRequestHandler.java
@@ -44,6 +44,7 @@ public class PropertiesRequestHandler extends RequestHandlerBase
       props = System.getProperties();
     }
     rsp.add( "system.properties", props );
+    rsp.setHttpCaching(false);
   }
   
   //////////////////////// SolrInfoMBeans methods //////////////////////
diff --git a/src/java/org/apache/solr/handler/admin/ShowFileRequestHandler.java b/src/java/org/apache/solr/handler/admin/ShowFileRequestHandler.java
index 53f127bb0b6..1b75469bc79 100644
--- a/src/java/org/apache/solr/handler/admin/ShowFileRequestHandler.java
+++ b/src/java/org/apache/solr/handler/admin/ShowFileRequestHandler.java
@@ -183,6 +183,7 @@ public class ShowFileRequestHandler extends RequestHandlerBase
   
       rsp.add( RawResponseWriter.CONTENT, content );
     }
+    rsp.setHttpCaching(false);
   }
   
   /**
diff --git a/src/java/org/apache/solr/handler/admin/SystemInfoHandler.java b/src/java/org/apache/solr/handler/admin/SystemInfoHandler.java
index 453347ae05c..e43d0654db5 100644
--- a/src/java/org/apache/solr/handler/admin/SystemInfoHandler.java
+++ b/src/java/org/apache/solr/handler/admin/SystemInfoHandler.java
@@ -64,6 +64,7 @@ public class SystemInfoHandler extends RequestHandlerBase
     rsp.add( "lucene", getLuceneInfo() );
     rsp.add( "jvm", getJvmInfo() );
     rsp.add( "system", getSystemInfo() );
+    rsp.setHttpCaching(false);
   }
   
   /**
diff --git a/src/java/org/apache/solr/handler/admin/ThreadDumpHandler.java b/src/java/org/apache/solr/handler/admin/ThreadDumpHandler.java
index 7ad0d655259..b6d4be131d1 100644
--- a/src/java/org/apache/solr/handler/admin/ThreadDumpHandler.java
+++ b/src/java/org/apache/solr/handler/admin/ThreadDumpHandler.java
@@ -76,6 +76,7 @@ public class ThreadDumpHandler extends RequestHandlerBase
       lst.add( "thread", getThreadInfo( ti, tmbean ) );
     }
     system.add( "threadDump", lst );
+    rsp.setHttpCaching(false);
   }
 
   //--------------------------------------------------------------------------------