[ 
https://issues.apache.org/jira/browse/ARTEMIS-3138?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Francesco Nigro updated ARTEMIS-3138:
-------------------------------------
    Description: 
While starting a shared nothing master broker configured with discovery it 
performs discovery operations that could end up connecting the broker to itself.

 

The discoveries happen in different code paths:
 * while checking for a live server 
 * on cluster manager deploy

Because the broker can receive its same broadcast connector transport and for 
some reason it won't filter it out.
The existing logic to filter out connectors is based on the Node ID source of 
the broadcast event vs the one on the local server locator.
 

The former won't end up connecting the broker to itself, because the broker 
acceptors are still closed, while the latter yes and the established connection 
remain alive for the whole broker life-time.

 

The relevant stack traces are:
{code:java}
        at 
org.apache.activemq.artemis.core.cluster.DiscoveryGroup.<init>(DiscoveryGroup.java:96)
        at 
org.apache.activemq.artemis.core.client.impl.ServerLocatorImpl.createDiscoveryGroup(ServerLocatorImpl.java:298)
        at 
org.apache.activemq.artemis.core.client.impl.ServerLocatorImpl.startDiscovery(ServerLocatorImpl.java:275)
        at 
org.apache.activemq.artemis.core.client.impl.ServerLocatorImpl.initialize(ServerLocatorImpl.java:263)
        at 
org.apache.activemq.artemis.core.client.impl.ServerLocatorImpl.createSessionFactory(ServerLocatorImpl.java:650)
        at 
org.apache.activemq.artemis.core.client.impl.ServerLocatorImpl.connect(ServerLocatorImpl.java:549)
        at 
org.apache.activemq.artemis.core.client.impl.ServerLocatorImpl.connectNoWarnings(ServerLocatorImpl.java:555)
        at 
org.apache.activemq.artemis.core.server.impl.SharedNothingLiveActivation.isNodeIdUsed(SharedNothingLiveActivation.java:331)
        at 
org.apache.activemq.artemis.core.server.impl.SharedNothingLiveActivation.run(SharedNothingLiveActivation.java:102)
        at 
org.apache.activemq.artemis.core.server.impl.ActiveMQServerImpl.internalStart(ActiveMQServerImpl.java:634)
        at 
org.apache.activemq.artemis.core.server.impl.ActiveMQServerImpl.start(ActiveMQServerImpl.java:558)
        at 
org.apache.activemq.artemis.integration.FileBroker.start(FileBroker.java:64)
        at org.apache.activemq.artemis.cli.commands.Run.execute(Run.java:115)
        at 
org.apache.activemq.artemis.cli.Artemis.internalExecute(Artemis.java:154)
        at org.apache.activemq.artemis.cli.Artemis.execute(Artemis.java:102)
        at org.apache.activemq.artemis.cli.Artemis.execute(Artemis.java:129)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethodAccessorImpl.java:-1)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.apache.activemq.artemis.boot.Artemis.execute(Artemis.java:134)
        at org.apache.activemq.artemis.boot.Artemis.main(Artemis.java:50)
{code}
 And
{code:java}
        at 
org.apache.activemq.artemis.core.cluster.DiscoveryGroup.<init>(DiscoveryGroup.java:96)
        at 
org.apache.activemq.artemis.core.client.impl.ServerLocatorImpl.createDiscoveryGroup(ServerLocatorImpl.java:298)
        at 
org.apache.activemq.artemis.core.client.impl.ServerLocatorImpl.startDiscovery(ServerLocatorImpl.java:275)
        at 
org.apache.activemq.artemis.core.client.impl.ServerLocatorImpl.initialize(ServerLocatorImpl.java:263)
        at 
org.apache.activemq.artemis.core.server.cluster.ClusterController.configAndAdd(ClusterController.java:230)
        at 
org.apache.activemq.artemis.core.server.cluster.ClusterController.addClusterConnection(ClusterController.java:197)
        at 
org.apache.activemq.artemis.core.server.cluster.ClusterManager.deployClusterConnection(ClusterManager.java:612)
        at 
org.apache.activemq.artemis.core.server.cluster.ClusterManager.deploy(ClusterManager.java:245)
        at 
org.apache.activemq.artemis.core.server.impl.ActiveMQServerImpl.initialisePart1(ActiveMQServerImpl.java:3066)
        at 
org.apache.activemq.artemis.core.server.impl.SharedNothingLiveActivation.run(SharedNothingLiveActivation.java:114)
        at 
org.apache.activemq.artemis.core.server.impl.ActiveMQServerImpl.internalStart(ActiveMQServerImpl.java:634)
        at 
org.apache.activemq.artemis.core.server.impl.ActiveMQServerImpl.start(ActiveMQServerImpl.java:558)
        at 
org.apache.activemq.artemis.integration.FileBroker.start(FileBroker.java:64)
        at org.apache.activemq.artemis.cli.commands.Run.execute(Run.java:115)
        at 
org.apache.activemq.artemis.cli.Artemis.internalExecute(Artemis.java:154)
        at org.apache.activemq.artemis.cli.Artemis.execute(Artemis.java:102)
        at org.apache.activemq.artemis.cli.Artemis.execute(Artemis.java:129)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethodAccessorImpl.java:-1)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.apache.activemq.artemis.boot.Artemis.execute(Artemis.java:134)
        at org.apache.activemq.artemis.boot.Artemis.main(Artemis.java:50)
{code}

On both cases, the same broker transport isn't ignored because the discovery 
has been started with a randomly generated Node ID on the server locator, 
instead of using the broker real Node ID.

The subsequent cluster manager start will start, instead, setting the broker 
Node ID on the sever locator while its cluster connection is activated.
The relevant stack trace is:
{code:java}
        at 
org.apache.activemq.artemis.core.cluster.DiscoveryGroup.<init>(DiscoveryGroup.java:96)
        at 
org.apache.activemq.artemis.core.client.impl.ServerLocatorImpl.createDiscoveryGroup(ServerLocatorImpl.java:298)
        at 
org.apache.activemq.artemis.core.client.impl.ServerLocatorImpl.startDiscovery(ServerLocatorImpl.java:275)
        at 
org.apache.activemq.artemis.core.client.impl.ServerLocatorImpl.initialize(ServerLocatorImpl.java:263)
        at 
org.apache.activemq.artemis.core.client.impl.ServerLocatorImpl.start(ServerLocatorImpl.java:477)
        at 
org.apache.activemq.artemis.core.server.cluster.impl.ClusterConnectionImpl.activate(ClusterConnectionImpl.java:680)
        at 
org.apache.activemq.artemis.core.server.cluster.impl.ClusterConnectionImpl.start(ClusterConnectionImpl.java:399)
        at 
org.apache.activemq.artemis.core.server.cluster.ClusterManager.start(ClusterManager.java:270)
        at 
org.apache.activemq.artemis.core.server.impl.ActiveMQServerImpl.initialisePart2(ActiveMQServerImpl.java:3225)
        at 
org.apache.activemq.artemis.core.server.impl.SharedNothingLiveActivation.run(SharedNothingLiveActivation.java:118)
        at 
org.apache.activemq.artemis.core.server.impl.ActiveMQServerImpl.internalStart(ActiveMQServerImpl.java:634)
        at 
org.apache.activemq.artemis.core.server.impl.ActiveMQServerImpl.start(ActiveMQServerImpl.java:558)
        at 
org.apache.activemq.artemis.integration.FileBroker.start(FileBroker.java:64)
        at org.apache.activemq.artemis.cli.commands.Run.execute(Run.java:115)
        at 
org.apache.activemq.artemis.cli.Artemis.internalExecute(Artemis.java:154)
        at org.apache.activemq.artemis.cli.Artemis.execute(Artemis.java:102)
        at org.apache.activemq.artemis.cli.Artemis.execute(Artemis.java:129)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethodAccessorImpl.java:-1)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.apache.activemq.artemis.boot.Artemis.execute(Artemis.java:134)
        at org.apache.activemq.artemis.boot.Artemis.main(Artemis.java:50)
{code}

  was:
While starting a shared nothing master broker configured with discovery it 
performs discovery operations that could end up connecting the broker to itself.

 

The discoveries happen in different code paths:
 * while checking for a live server 
 * on cluster manager deploy

Because the broker can receive its same broadcast connector transport and for 
some reason it won't filter it out.
 

The former won't end up connecting the broker to itself, because the broker 
acceptors are still closed, while the latter yes and the established connection 
remain alive for the whole broker life-time.

 

The relevant stack traces are:
{code:java}
        at 
org.apache.activemq.artemis.core.cluster.DiscoveryGroup.<init>(DiscoveryGroup.java:96)
        at 
org.apache.activemq.artemis.core.client.impl.ServerLocatorImpl.createDiscoveryGroup(ServerLocatorImpl.java:298)
        at 
org.apache.activemq.artemis.core.client.impl.ServerLocatorImpl.startDiscovery(ServerLocatorImpl.java:275)
        at 
org.apache.activemq.artemis.core.client.impl.ServerLocatorImpl.initialize(ServerLocatorImpl.java:263)
        at 
org.apache.activemq.artemis.core.client.impl.ServerLocatorImpl.createSessionFactory(ServerLocatorImpl.java:650)
        at 
org.apache.activemq.artemis.core.client.impl.ServerLocatorImpl.connect(ServerLocatorImpl.java:549)
        at 
org.apache.activemq.artemis.core.client.impl.ServerLocatorImpl.connectNoWarnings(ServerLocatorImpl.java:555)
        at 
org.apache.activemq.artemis.core.server.impl.SharedNothingLiveActivation.isNodeIdUsed(SharedNothingLiveActivation.java:331)
        at 
org.apache.activemq.artemis.core.server.impl.SharedNothingLiveActivation.run(SharedNothingLiveActivation.java:102)
        at 
org.apache.activemq.artemis.core.server.impl.ActiveMQServerImpl.internalStart(ActiveMQServerImpl.java:634)
        at 
org.apache.activemq.artemis.core.server.impl.ActiveMQServerImpl.start(ActiveMQServerImpl.java:558)
        at 
org.apache.activemq.artemis.integration.FileBroker.start(FileBroker.java:64)
        at org.apache.activemq.artemis.cli.commands.Run.execute(Run.java:115)
        at 
org.apache.activemq.artemis.cli.Artemis.internalExecute(Artemis.java:154)
        at org.apache.activemq.artemis.cli.Artemis.execute(Artemis.java:102)
        at org.apache.activemq.artemis.cli.Artemis.execute(Artemis.java:129)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethodAccessorImpl.java:-1)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.apache.activemq.artemis.boot.Artemis.execute(Artemis.java:134)
        at org.apache.activemq.artemis.boot.Artemis.main(Artemis.java:50)
{code}
 And
{code:java}
        at 
org.apache.activemq.artemis.core.cluster.DiscoveryGroup.<init>(DiscoveryGroup.java:96)
        at 
org.apache.activemq.artemis.core.client.impl.ServerLocatorImpl.createDiscoveryGroup(ServerLocatorImpl.java:298)
        at 
org.apache.activemq.artemis.core.client.impl.ServerLocatorImpl.startDiscovery(ServerLocatorImpl.java:275)
        at 
org.apache.activemq.artemis.core.client.impl.ServerLocatorImpl.initialize(ServerLocatorImpl.java:263)
        at 
org.apache.activemq.artemis.core.server.cluster.ClusterController.configAndAdd(ClusterController.java:230)
        at 
org.apache.activemq.artemis.core.server.cluster.ClusterController.addClusterConnection(ClusterController.java:197)
        at 
org.apache.activemq.artemis.core.server.cluster.ClusterManager.deployClusterConnection(ClusterManager.java:612)
        at 
org.apache.activemq.artemis.core.server.cluster.ClusterManager.deploy(ClusterManager.java:245)
        at 
org.apache.activemq.artemis.core.server.impl.ActiveMQServerImpl.initialisePart1(ActiveMQServerImpl.java:3066)
        at 
org.apache.activemq.artemis.core.server.impl.SharedNothingLiveActivation.run(SharedNothingLiveActivation.java:114)
        at 
org.apache.activemq.artemis.core.server.impl.ActiveMQServerImpl.internalStart(ActiveMQServerImpl.java:634)
        at 
org.apache.activemq.artemis.core.server.impl.ActiveMQServerImpl.start(ActiveMQServerImpl.java:558)
        at 
org.apache.activemq.artemis.integration.FileBroker.start(FileBroker.java:64)
        at org.apache.activemq.artemis.cli.commands.Run.execute(Run.java:115)
        at 
org.apache.activemq.artemis.cli.Artemis.internalExecute(Artemis.java:154)
        at org.apache.activemq.artemis.cli.Artemis.execute(Artemis.java:102)
        at org.apache.activemq.artemis.cli.Artemis.execute(Artemis.java:129)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethodAccessorImpl.java:-1)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.apache.activemq.artemis.boot.Artemis.execute(Artemis.java:134)
        at org.apache.activemq.artemis.boot.Artemis.main(Artemis.java:50)
{code}

On both cases, the same broker transport isn't ignored because the discovery 
has been started with a randomly generated Node ID on the server locator, 
instead of using the broker real Node ID.

The subsequent cluster manager start will start, instead, setting the broker 
Node ID on the sever locator while its cluster connection is activated.
The relevant stack trace is:
{code:java}
        at 
org.apache.activemq.artemis.core.cluster.DiscoveryGroup.<init>(DiscoveryGroup.java:96)
        at 
org.apache.activemq.artemis.core.client.impl.ServerLocatorImpl.createDiscoveryGroup(ServerLocatorImpl.java:298)
        at 
org.apache.activemq.artemis.core.client.impl.ServerLocatorImpl.startDiscovery(ServerLocatorImpl.java:275)
        at 
org.apache.activemq.artemis.core.client.impl.ServerLocatorImpl.initialize(ServerLocatorImpl.java:263)
        at 
org.apache.activemq.artemis.core.client.impl.ServerLocatorImpl.start(ServerLocatorImpl.java:477)
        at 
org.apache.activemq.artemis.core.server.cluster.impl.ClusterConnectionImpl.activate(ClusterConnectionImpl.java:680)
        at 
org.apache.activemq.artemis.core.server.cluster.impl.ClusterConnectionImpl.start(ClusterConnectionImpl.java:399)
        at 
org.apache.activemq.artemis.core.server.cluster.ClusterManager.start(ClusterManager.java:270)
        at 
org.apache.activemq.artemis.core.server.impl.ActiveMQServerImpl.initialisePart2(ActiveMQServerImpl.java:3225)
        at 
org.apache.activemq.artemis.core.server.impl.SharedNothingLiveActivation.run(SharedNothingLiveActivation.java:118)
        at 
org.apache.activemq.artemis.core.server.impl.ActiveMQServerImpl.internalStart(ActiveMQServerImpl.java:634)
        at 
org.apache.activemq.artemis.core.server.impl.ActiveMQServerImpl.start(ActiveMQServerImpl.java:558)
        at 
org.apache.activemq.artemis.integration.FileBroker.start(FileBroker.java:64)
        at org.apache.activemq.artemis.cli.commands.Run.execute(Run.java:115)
        at 
org.apache.activemq.artemis.cli.Artemis.internalExecute(Artemis.java:154)
        at org.apache.activemq.artemis.cli.Artemis.execute(Artemis.java:102)
        at org.apache.activemq.artemis.cli.Artemis.execute(Artemis.java:129)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethodAccessorImpl.java:-1)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.apache.activemq.artemis.boot.Artemis.execute(Artemis.java:134)
        at org.apache.activemq.artemis.boot.Artemis.main(Artemis.java:50)
{code}


> Shared Nothing Live broker shouldn't try to connect to itself
> -------------------------------------------------------------
>
>                 Key: ARTEMIS-3138
>                 URL: https://issues.apache.org/jira/browse/ARTEMIS-3138
>             Project: ActiveMQ Artemis
>          Issue Type: Improvement
>            Reporter: Francesco Nigro
>            Priority: Major
>
> While starting a shared nothing master broker configured with discovery it 
> performs discovery operations that could end up connecting the broker to 
> itself.
>  
> The discoveries happen in different code paths:
>  * while checking for a live server 
>  * on cluster manager deploy
> Because the broker can receive its same broadcast connector transport and for 
> some reason it won't filter it out.
> The existing logic to filter out connectors is based on the Node ID source of 
> the broadcast event vs the one on the local server locator.
>  
> The former won't end up connecting the broker to itself, because the broker 
> acceptors are still closed, while the latter yes and the established 
> connection remain alive for the whole broker life-time.
>  
> The relevant stack traces are:
> {code:java}
>       at 
> org.apache.activemq.artemis.core.cluster.DiscoveryGroup.<init>(DiscoveryGroup.java:96)
>       at 
> org.apache.activemq.artemis.core.client.impl.ServerLocatorImpl.createDiscoveryGroup(ServerLocatorImpl.java:298)
>       at 
> org.apache.activemq.artemis.core.client.impl.ServerLocatorImpl.startDiscovery(ServerLocatorImpl.java:275)
>       at 
> org.apache.activemq.artemis.core.client.impl.ServerLocatorImpl.initialize(ServerLocatorImpl.java:263)
>       at 
> org.apache.activemq.artemis.core.client.impl.ServerLocatorImpl.createSessionFactory(ServerLocatorImpl.java:650)
>       at 
> org.apache.activemq.artemis.core.client.impl.ServerLocatorImpl.connect(ServerLocatorImpl.java:549)
>       at 
> org.apache.activemq.artemis.core.client.impl.ServerLocatorImpl.connectNoWarnings(ServerLocatorImpl.java:555)
>       at 
> org.apache.activemq.artemis.core.server.impl.SharedNothingLiveActivation.isNodeIdUsed(SharedNothingLiveActivation.java:331)
>       at 
> org.apache.activemq.artemis.core.server.impl.SharedNothingLiveActivation.run(SharedNothingLiveActivation.java:102)
>       at 
> org.apache.activemq.artemis.core.server.impl.ActiveMQServerImpl.internalStart(ActiveMQServerImpl.java:634)
>       at 
> org.apache.activemq.artemis.core.server.impl.ActiveMQServerImpl.start(ActiveMQServerImpl.java:558)
>       at 
> org.apache.activemq.artemis.integration.FileBroker.start(FileBroker.java:64)
>       at org.apache.activemq.artemis.cli.commands.Run.execute(Run.java:115)
>       at 
> org.apache.activemq.artemis.cli.Artemis.internalExecute(Artemis.java:154)
>       at org.apache.activemq.artemis.cli.Artemis.execute(Artemis.java:102)
>       at org.apache.activemq.artemis.cli.Artemis.execute(Artemis.java:129)
>       at 
> sun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethodAccessorImpl.java:-1)
>       at 
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
>       at 
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>       at java.lang.reflect.Method.invoke(Method.java:498)
>       at org.apache.activemq.artemis.boot.Artemis.execute(Artemis.java:134)
>       at org.apache.activemq.artemis.boot.Artemis.main(Artemis.java:50)
> {code}
>  And
> {code:java}
>       at 
> org.apache.activemq.artemis.core.cluster.DiscoveryGroup.<init>(DiscoveryGroup.java:96)
>       at 
> org.apache.activemq.artemis.core.client.impl.ServerLocatorImpl.createDiscoveryGroup(ServerLocatorImpl.java:298)
>       at 
> org.apache.activemq.artemis.core.client.impl.ServerLocatorImpl.startDiscovery(ServerLocatorImpl.java:275)
>       at 
> org.apache.activemq.artemis.core.client.impl.ServerLocatorImpl.initialize(ServerLocatorImpl.java:263)
>       at 
> org.apache.activemq.artemis.core.server.cluster.ClusterController.configAndAdd(ClusterController.java:230)
>       at 
> org.apache.activemq.artemis.core.server.cluster.ClusterController.addClusterConnection(ClusterController.java:197)
>       at 
> org.apache.activemq.artemis.core.server.cluster.ClusterManager.deployClusterConnection(ClusterManager.java:612)
>       at 
> org.apache.activemq.artemis.core.server.cluster.ClusterManager.deploy(ClusterManager.java:245)
>       at 
> org.apache.activemq.artemis.core.server.impl.ActiveMQServerImpl.initialisePart1(ActiveMQServerImpl.java:3066)
>       at 
> org.apache.activemq.artemis.core.server.impl.SharedNothingLiveActivation.run(SharedNothingLiveActivation.java:114)
>       at 
> org.apache.activemq.artemis.core.server.impl.ActiveMQServerImpl.internalStart(ActiveMQServerImpl.java:634)
>       at 
> org.apache.activemq.artemis.core.server.impl.ActiveMQServerImpl.start(ActiveMQServerImpl.java:558)
>       at 
> org.apache.activemq.artemis.integration.FileBroker.start(FileBroker.java:64)
>       at org.apache.activemq.artemis.cli.commands.Run.execute(Run.java:115)
>       at 
> org.apache.activemq.artemis.cli.Artemis.internalExecute(Artemis.java:154)
>       at org.apache.activemq.artemis.cli.Artemis.execute(Artemis.java:102)
>       at org.apache.activemq.artemis.cli.Artemis.execute(Artemis.java:129)
>       at 
> sun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethodAccessorImpl.java:-1)
>       at 
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
>       at 
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>       at java.lang.reflect.Method.invoke(Method.java:498)
>       at org.apache.activemq.artemis.boot.Artemis.execute(Artemis.java:134)
>       at org.apache.activemq.artemis.boot.Artemis.main(Artemis.java:50)
> {code}
> On both cases, the same broker transport isn't ignored because the discovery 
> has been started with a randomly generated Node ID on the server locator, 
> instead of using the broker real Node ID.
> The subsequent cluster manager start will start, instead, setting the broker 
> Node ID on the sever locator while its cluster connection is activated.
> The relevant stack trace is:
> {code:java}
>       at 
> org.apache.activemq.artemis.core.cluster.DiscoveryGroup.<init>(DiscoveryGroup.java:96)
>       at 
> org.apache.activemq.artemis.core.client.impl.ServerLocatorImpl.createDiscoveryGroup(ServerLocatorImpl.java:298)
>       at 
> org.apache.activemq.artemis.core.client.impl.ServerLocatorImpl.startDiscovery(ServerLocatorImpl.java:275)
>       at 
> org.apache.activemq.artemis.core.client.impl.ServerLocatorImpl.initialize(ServerLocatorImpl.java:263)
>       at 
> org.apache.activemq.artemis.core.client.impl.ServerLocatorImpl.start(ServerLocatorImpl.java:477)
>       at 
> org.apache.activemq.artemis.core.server.cluster.impl.ClusterConnectionImpl.activate(ClusterConnectionImpl.java:680)
>       at 
> org.apache.activemq.artemis.core.server.cluster.impl.ClusterConnectionImpl.start(ClusterConnectionImpl.java:399)
>       at 
> org.apache.activemq.artemis.core.server.cluster.ClusterManager.start(ClusterManager.java:270)
>       at 
> org.apache.activemq.artemis.core.server.impl.ActiveMQServerImpl.initialisePart2(ActiveMQServerImpl.java:3225)
>       at 
> org.apache.activemq.artemis.core.server.impl.SharedNothingLiveActivation.run(SharedNothingLiveActivation.java:118)
>       at 
> org.apache.activemq.artemis.core.server.impl.ActiveMQServerImpl.internalStart(ActiveMQServerImpl.java:634)
>       at 
> org.apache.activemq.artemis.core.server.impl.ActiveMQServerImpl.start(ActiveMQServerImpl.java:558)
>       at 
> org.apache.activemq.artemis.integration.FileBroker.start(FileBroker.java:64)
>       at org.apache.activemq.artemis.cli.commands.Run.execute(Run.java:115)
>       at 
> org.apache.activemq.artemis.cli.Artemis.internalExecute(Artemis.java:154)
>       at org.apache.activemq.artemis.cli.Artemis.execute(Artemis.java:102)
>       at org.apache.activemq.artemis.cli.Artemis.execute(Artemis.java:129)
>       at 
> sun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethodAccessorImpl.java:-1)
>       at 
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
>       at 
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>       at java.lang.reflect.Method.invoke(Method.java:498)
>       at org.apache.activemq.artemis.boot.Artemis.execute(Artemis.java:134)
>       at org.apache.activemq.artemis.boot.Artemis.main(Artemis.java:50)
> {code}



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