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https://issues.apache.org/jira/browse/ARTEMIS-2421?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Justin Bertram resolved ARTEMIS-2421.
-------------------------------------
    Fix Version/s: 2.11.0
       Resolution: Fixed

> Implement periodic journal lock evaluation
> ------------------------------------------
>
>                 Key: ARTEMIS-2421
>                 URL: https://issues.apache.org/jira/browse/ARTEMIS-2421
>             Project: ActiveMQ Artemis
>          Issue Type: Bug
>          Components: Broker
>    Affects Versions: 2.6.4
>            Reporter: Gaurav
>            Assignee: Justin Bertram
>            Priority: Critical
>             Fix For: 2.11.0
>
>         Attachments: broker_master.xml, broker_slave.xml
>
>          Time Spent: 1h 50m
>  Remaining Estimate: 0h
>
> We have Live-Backup server configuration, single instance of Artemis Live 
> server (2.6.4 version) backed up by single instance of Backup server.
> Using shared file system as persistent storage.
> Please refer attachments for both Live-Backup broker configuration.
> *Fail Over Scenario*
>  # Node 1 acting as Live node and serving requests whereas Node 2 acting as 
> standby or passive node. No consumer is connected to these nodes
>  # Pushed 5 messages and verify message count as 5
>  # Perform NIC (Network) failure on Node 1 server ( i.e. Cluster is now 
> unable to connect to Node 1) . This will make Node 2 as Active and we are 
> also able to see previous 5 messages (pushed in step 2) successfully 
> replicated on Node 2
>  # Bring the network connection back for Node 1. This is where we are facing 
> issues as now both nodes acting as Live nodes and getting continuous error as 
> below:
> {quote}{{{color:#FF0000}AMQ212034: There are more than one servers on the 
> network broadcasting the same node id. You will see this message exactly once 
> (per node) if a node is restarted, in which case it can be safely ignored. 
> But if it is logged continuously it means you really do have more than one 
> node on the same network active concurrently with the same node id. This 
> could occur  if you have a backup node active at the same time as its live 
> node. nodeID=cd323206-4adc-11e9-814b-506b8d4ee653{color}}}
>  
> {quote}
> This situation bring entire cluster in inconsistent state and able to push 
> messages on both the nodes.
> Any pointer on this issue is much appreciated!



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