diff --git a/solr/CHANGES.txt b/solr/CHANGES.txt
index 50c0ee32b30..72a0d98ea0d 100644
--- a/solr/CHANGES.txt
+++ b/solr/CHANGES.txt
@@ -262,6 +262,9 @@ Other Changes
 * SOLR-5555: LBHttpSolrServer and CloudSolrServer constructors don't need to
   declare MalformedURLExceptions (Sushil Bajracharya, Alan Woodward)
 
+* SOLR-5565: Raise default ZooKeeper session timeout to 30 seconds from 15
+  seconds. (Mark Miller)
+
 ==================  4.6.0 ==================
 
 Versions of Major Components
diff --git a/solr/example/example-schemaless/solr/solr.xml b/solr/example/example-schemaless/solr/solr.xml
index 7ae7244baa5..94d60b6a29b 100644
--- a/solr/example/example-schemaless/solr/solr.xml
+++ b/solr/example/example-schemaless/solr/solr.xml
@@ -32,7 +32,7 @@
     <str name="host">${host:}</str>
     <int name="hostPort">${jetty.port:8983}</int>
     <str name="hostContext">${hostContext:solr}</str>
-    <int name="zkClientTimeout">${zkClientTimeout:15000}</int>
+    <int name="zkClientTimeout">${zkClientTimeout:30000}</int>
     <bool name="genericCoreNodeNames">${genericCoreNodeNames:true}</bool>
   </solrcloud>
 
diff --git a/solr/example/solr/solr.xml b/solr/example/solr/solr.xml
index 7ae7244baa5..94d60b6a29b 100644
--- a/solr/example/solr/solr.xml
+++ b/solr/example/solr/solr.xml
@@ -32,7 +32,7 @@
     <str name="host">${host:}</str>
     <int name="hostPort">${jetty.port:8983}</int>
     <str name="hostContext">${hostContext:solr}</str>
-    <int name="zkClientTimeout">${zkClientTimeout:15000}</int>
+    <int name="zkClientTimeout">${zkClientTimeout:30000}</int>
     <bool name="genericCoreNodeNames">${genericCoreNodeNames:true}</bool>
   </solrcloud>