Juan José Ramos Cassella created GEODE-3987:
-----------------------------------------------
Summary: 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
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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