narendly commented on a change in pull request #642: Fix zk session race
condition before creating a live instance
URL: https://github.com/apache/helix/pull/642#discussion_r353571828
##########
File path:
helix-core/src/main/java/org/apache/helix/manager/zk/zookeeper/ZkClient.java
##########
@@ -568,6 +612,31 @@ public void createEphemeral(final String path, final
Object data)
create(path, data, CreateMode.EPHEMERAL);
}
+ /**
+ * Create a session aware ephemeral node. Given an expected non-zero session
id, if the ephemeral
+ * node is successfully created, it is guaranteed to be in the expected
session.
+ *
+ * If the expected session is expired, which means the expected session does
not match the current
+ * session of ZK connection, the ephemeral node will not be created and
HelixException will be
Review comment:
Consider not using HelixException?
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