This query has been solved, quick look this morning reveals … user error ;)
From: Mike Lewis [mailto:[email protected]] Sent: 25 August 2015 17:31 To: [email protected] Subject: NodeCache query Hi, I’ve just started looking at ZooKeeper and Curator, so apologies for the simple question. I hope someone can help. The situation I have is this, · I create a ‘Master’ object (derived from LeaderSelectorListener) it takes leadership and writes Some data ‘X’ to a task path. · I create another Master (this is just awaiting Leadership). · A ‘Worker’ (see snippet below) is listener to changes on the task path and processes the message ‘X’ and the updates the path data to an empty array once it has done its task. This is all fine, except when I stop ‘Master’, the Standby takes over (which is good), but then I get the old message ‘X’ Replayed, i.e. I get two messages ‘X’ and the empty array. This is obviously default/desired behavior. Does anyone know how I can change this so that when a new ‘Master’ is elected, the old node events are not replayed? Thanks, Mike val cache = new NodeCache(client,taskPath) cache.start() val listener = new NodeCacheListener { override def nodeChanged(): Unit = { val str : String = new String(cache.getCurrentData.getData) val len = str.length println (s"Worker $workerId nodeChanged event , data $str, length $len") if ( len > 0) { /** * I have a non-empty task, process it... */ println (s"Doing my task.... let master know I can handle more tasks...") client.inTransaction().setData().forPath(taskPath,Array.empty).and().commit() } } } -------------------------------------------------------------------------------------------------------------------------- This email has been sent to you on behalf of Nephila Advisors LLC (“Advisors”). Advisors provides consultancy services to Nephila Capital Ltd. (“Capital”), an investment advisor managed and carrying on business in Bermuda. 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