Thank you Edward for replaying. In my opinion, your first case can’t happen, because the election mechanism will elect the node that has the latest transaction (zxid) seen. In this case, it will be only your second case is correct, unless the node that has latest transaction crashes forever.
Ibrahim From: Edward Carter [via zookeeper-user] [mailto:[email protected]] Sent: Tuesday, January 06, 2015 11:53 م To: Ibrahim El-sanosi (PGR) Subject: Re: Question about the two-phrase commit If an operation is logged to disk on a minority of servers, then what happens on restart depends on which server wins the leader election. Since the new operation is on a minority, depending on network conditions, a server that did *not* log the operation might win the leader election. In this case, the operation will be discarded. If a server that *did* log the operation wins the leader election (as would be the case in the absence of network or latency issues), then the operation will be propagated to the remaining servers in the ensemble. Edward On Jan 6, 2015, at 3:42 PM, Ibrahim <[hidden email]</user/SendEmail.jtp?type=node&node=7580741&i=0>> wrote: > Hi Alexander, > > So, you meant that if there is operation loged to the disk but it hasn't got > enough majority, then if the zookeeper servers restart, the new leader will > re-broadcast the loged operation again to the followers to commit that > operation. > > Does above what you meant by (NEWLEADER message acts as the accept and > UPTODATE message acts as commit). > > Am I right? > > Thank you > > Ibrahim > > > > -- > View this message in context: > https://urldefense.proofpoint.com/v1/url?u=http://zookeeper-user.578899.n2.nabble.com/Question-about-the-two-phrase-commit-tp7580725p7580739.html&k=ZVNjlDMF0FElm4dQtryO4A%3D%3D%0A&r=09h%2FR60Z1NzKuJcTv9DkEw%3D%3D%0A&m=T7mEM8unY7tsVTbHXoSOqvwXEZEBCs8%2BRWl0cT03ruo%3D%0A&s=bcce5c88300c51126777473143b3f560542cf1c5699b33283f888e27ed41529f > Sent from the zookeeper-user mailing list archive at Nabble.com. ________________________________ If you reply to this email, your message will be added to the discussion below: http://zookeeper-user.578899.n2.nabble.com/Question-about-the-two-phrase-commit-tp7580725p7580741.html To unsubscribe from Question about the two-phrase commit, click here<http://zookeeper-user.578899.n2.nabble.com/template/NamlServlet.jtp?macro=unsubscribe_by_code&node=7580725&code=aS5zLmVsLXNhbm9zaUBuZXdjYXN0bGUuYWMudWt8NzU4MDcyNXw1NTE4MjI0Njk=>. NAML<http://zookeeper-user.578899.n2.nabble.com/template/NamlServlet.jtp?macro=macro_viewer&id=instant_html%21nabble%3Aemail.naml&base=nabble.naml.namespaces.BasicNamespace-nabble.view.web.template.NabbleNamespace-nabble.view.web.template.NodeNamespace&breadcrumbs=notify_subscribers%21nabble%3Aemail.naml-instant_emails%21nabble%3Aemail.naml-send_instant_email%21nabble%3Aemail.naml> -- View this message in context: http://zookeeper-user.578899.n2.nabble.com/Question-about-the-two-phrase-commit-tp7580725p7580743.html Sent from the zookeeper-user mailing list archive at Nabble.com.
