Index: oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/ClusterNodeInfo.java
===================================================================
--- oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/ClusterNodeInfo.java	(revision 1760296)
+++ oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/ClusterNodeInfo.java	(working copy)
@@ -806,6 +806,8 @@
             update.equals(LEASE_END_KEY, null, previousLeaseEndTime);
             // plus it must still be active ..
             update.equals(STATE, null, ClusterNodeState.ACTIVE.name());
+            // plus it must not have a recovery lock on it
+            update.notEquals(REV_RECOVERY_LOCK, RecoverLockState.ACQUIRED.name());
             // @TODO: to make it 100% failure proof we could introduce
             // yet another field to clusterNodes: a runtimeId that we
             // create (UUID) at startup each time - and against that
Index: oak-core/src/test/java/org/apache/jackrabbit/oak/plugins/document/ClusterNodeInfoTest.java
===================================================================
--- oak-core/src/test/java/org/apache/jackrabbit/oak/plugins/document/ClusterNodeInfoTest.java	(revision 1760296)
+++ oak-core/src/test/java/org/apache/jackrabbit/oak/plugins/document/ClusterNodeInfoTest.java	(working copy)
@@ -126,7 +126,6 @@
     }
 
     // OAK-4779
-    @Ignore
     @Test
     public void renewLeaseWhileRecoveryRunning() throws Exception {
         ClusterNodeInfo info = newClusterNodeInfo(1);