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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (GEODE-3987) Enforce the uniqueness of a single gateway-receiver per member
Date Wed, 22 Nov 2017 22:42:01 GMT

    [ https://issues.apache.org/jira/browse/GEODE-3987?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16263484#comment-16263484
] 

ASF GitHub Bot commented on GEODE-3987:
---------------------------------------

jujoramos commented on a change in pull request #1086: GEODE-3987: enforce GatewayReceiver
uniqueness per member.
URL: https://github.com/apache/geode/pull/1086#discussion_r152694533
 
 

 ##########
 File path: geode-core/src/main/java/org/apache/geode/internal/i18n/LocalizedStrings.java
 ##########
 @@ -7713,6 +7713,8 @@
       new StringId(6664, "{0}: Providing synchronization event for key={1}; timestamp={2}:
{3}");
   public static final StringId AbstractGatewaySender_ENQUEUEING_SYNCHRONIZATION_EVENT =
       new StringId(6665, "{0}: Enqueueing synchronization event: {1}");
+  public static final StringId GatewayReceiver_ALREADY_EXISTS =
+      new StringId(6665, "A Gateway Receiver already exists on this member.");
 
 Review comment:
   Thanks @jhuynh1,
   I'll directly remove the constant from the `LocalizedStrings` class, missed that discussion
in the dev list.

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> Enforce the uniqueness of a single gateway-receiver per member
> --------------------------------------------------------------
>
>                 Key: GEODE-3987
>                 URL: https://issues.apache.org/jira/browse/GEODE-3987
>             Project: Geode
>          Issue Type: Bug
>            Reporter: Juan José Ramos Cassella
>            Assignee: Juan José Ramos Cassella
>
> Within the documentation, both in [Configure Gateway Receivers|http://geode.apache.org/docs/guide/13/topologies_and_comm/multi_site_configuration/setting_up_a_multisite_system.html#setting_up_a_multisite_system__section_E3A44F85359046C7ADD12861D261637B]
and [gfsh create gateway-receiver|http://geode.apache.org/docs/guide/13/tools_modules/gfsh/command-pages/create.html#topic_a4x_pb1_dk],
we state that only one {{gateway-receiver}} is allowed per member. However, there is no enforcement
of this rule within the code nor within the schema for the {{cache.xml}} file, so the user
might end up having more than one {{gateway-receiver}} per host.
> It's unknown which {{gateway-receiver}} is going to be used after a restart, making it
hard to configure firewall rules between clusters, if any. The following exception is also
printed in the logs whenever we try to register (only the first one is succesfull) the MBean
for the {{gateway-receiver}}:
> {noformat}
> [warning 2017/11/16 15:27:46.156 PST host1-server1 <Function Execution Processor1>
tid=0x44] javax.management.InstanceAlreadyExistsException: GemFire:service=GatewayReceiver,type=Member,member=host1-server1
> org.apache.geode.management.ManagementException: javax.management.InstanceAlreadyExistsException:
GemFire:service=GatewayReceiver,type=Member,member=host1-server1
> 	at org.apache.geode.management.internal.MBeanJMXAdapter.registerMBean(MBeanJMXAdapter.java:110)
> 	at org.apache.geode.management.internal.SystemManagementService.registerInternalMBean(SystemManagementService.java:368)
> 	at org.apache.geode.management.internal.beans.ManagementAdapter.createGatewayReceiverMBean(ManagementAdapter.java:471)
> 	at org.apache.geode.management.internal.beans.ManagementAdapter.handleGatewayReceiverStart(ManagementAdapter.java:493)
> 	at org.apache.geode.management.internal.beans.ManagementListener.handleEvent(ManagementListener.java:134)
> 	at org.apache.geode.distributed.internal.InternalDistributedSystem.notifyResourceEventListeners(InternalDistributedSystem.java:2175)
> 	at org.apache.geode.distributed.internal.InternalDistributedSystem.handleResourceEvent(InternalDistributedSystem.java:562)
> 	at org.apache.geode.internal.cache.wan.GatewayReceiverImpl.start(GatewayReceiverImpl.java:194)
> 	at org.apache.geode.internal.cache.wan.GatewayReceiverFactoryImpl.create(GatewayReceiverFactoryImpl.java:141)
> 	at org.apache.geode.management.internal.cli.functions.GatewayReceiverCreateFunction.createGatewayReceiver(GatewayReceiverCreateFunction.java:164)
> 	at org.apache.geode.management.internal.cli.functions.GatewayReceiverCreateFunction.execute(GatewayReceiverCreateFunction.java:63)
> 	at org.apache.geode.internal.cache.MemberFunctionStreamingMessage.process(MemberFunctionStreamingMessage.java:186)
> 	at org.apache.geode.distributed.internal.DistributionMessage.scheduleAction(DistributionMessage.java:374)
> 	at org.apache.geode.distributed.internal.DistributionMessage$1.run(DistributionMessage.java:440)
> 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> 	at org.apache.geode.distributed.internal.DistributionManager.runUntilShutdown(DistributionManager.java:668)
> 	at org.apache.geode.distributed.internal.DistributionManager$9$1.run(DistributionManager.java:1114)
> 	at java.lang.Thread.run(Thread.java:745)
> Caused by: javax.management.InstanceAlreadyExistsException: GemFire:service=GatewayReceiver,type=Member,member=host1-server1
> 	at com.sun.jmx.mbeanserver.Repository.addMBean(Repository.java:437)
> 	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerWithRepository(DefaultMBeanServerInterceptor.java:1898)
> 	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerDynamicMBean(DefaultMBeanServerInterceptor.java:966)
> 	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerObject(DefaultMBeanServerInterceptor.java:900)
> 	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerMBean(DefaultMBeanServerInterceptor.java:324)
> 	at com.sun.jmx.mbeanserver.JmxMBeanServer.registerMBean(JmxMBeanServer.java:522)
> 	at org.apache.geode.management.internal.MBeanJMXAdapter.registerMBean(MBeanJMXAdapter.java:105)
> 	... 18 more
> {noformat}
> The fix implies:
> . Change the {{maxOccurs}} attribute from {{unbounded}} to {{1}} in the {{cache-1.0.xsd}}
file.
> . Add the validation to the {{GatewayReceiverFactoryImpl.create()}} method, as this is
the single entry point for {{GatewayReceiver}} instance creations.



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