Github user eribeiro commented on a diff in the pull request:
https://github.com/apache/zookeeper/pull/632#discussion_r224212868
--- Diff:
zookeeper-server/src/main/java/org/apache/zookeeper/server/DataNode.java ---
@@ -37,6 +37,14 @@
*
*/
public class DataNode implements Record {
+
+ // the digest value of this node, calculated from path, data and stat
+ private long digest;
+
+ // indicate if the digest of this node is up to date or not, used to
+ // optimize the performance.
+ boolean digestCached;
--- End diff --
`volatile boolean digestChanged;` ?
---
