Thanks for the explanation, please find my comments below and please help Scenario: Power off and On Scenario for HA setup of Artemis
The behavior you're seeing is the expected behavior in this use-case since you're using replication. In step 3 when you power-off Node-2 there is now no broker online with those 100 messages you just sent. When you restart Node-1 it has no way of knowing those 100 messages even exist since they were produced when it was offline and the broker that owns them is offline as well. If you ever find yourself in a situation where you're using replication and both your master and slave are offline you need to examine the logs to see which was active most recently as that will tell you which node has the most up-to-date data. Then you should start that node first. If it's the slave then you'll need to change the configuration to be live so that it will actually start all the way rather than waiting for its live broker to start. What I see is only way to recover the messages is to verify the logs which are most up-to-date data and needs to start the node. Here In this case, if the complete server is down and it is not recoverable, how will we recover such scenarios? > Scenario: Network disruption scenario You'll need to describe a bit more about what you mean by "network disruption" here. In general, it's important to note that running a single live/backup pair using replication is *not recommended* due to the risk of split-brain (i.e. a situation where both the live and the backup become active at the same time due to a loss of connectivity between the live and the backup). It's recommended that you use 3 live/backup pairs (so that they can perform quorum voting to mitigate split-brain) or shared-storage (where the locks on the journal on the shared storage device prevents the live and the backup from running simultaneously). Here network disruption means, we tried by removing the ethernet option in linux environment. so, even in this case we should bring up the broker which uses the the most up-to-date data by looking at the logs?? by bringing up the network. having 3 live/backup pairs(so, it means 6 brokers in 6 different servers) will be a heavy solution for us. -- Sent from: http://activemq.2283324.n4.nabble.com/ActiveMQ-User-f2341805.html
