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https://issues.apache.org/jira/browse/IGNITE-25868?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Pavel Tupitsyn updated IGNITE-25868:
------------------------------------
Ignite Flags: Release Notes Required (was: Docs Required,Release Notes
Required)
> Java thin 3.0: JMX export fails when more than one client instance exists
> -------------------------------------------------------------------------
>
> Key: IGNITE-25868
> URL: https://issues.apache.org/jira/browse/IGNITE-25868
> Project: Ignite
> Issue Type: Bug
> Components: metrics ai3
> Reporter: Pavel Tupitsyn
> Assignee: Pavel Tupitsyn
> Priority: Major
> Labels: ignite-3
> Fix For: 3.1
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> When more than one *IgniteClient* instance exists with *metricsEnabled =
> true*, only the first one exports the metrics to JMX, others log an error.
> Reproducer:
> * Modify *ClientMetricsTest.testJmxExport*, add {code}var client2 =
> clientBuilder().metricsEnabled(metricsEnabled).build();{code}
> * Run the test, there is an error in the log, and only *one active connection
> is visible via JMX* {code}
> [2025-07-08T18:32:37,950][ERROR][main][JmxExporter] MBean for metric set
> can't be created [name=client].
> javax.management.InstanceAlreadyExistsException:
> org.apache.ignite:type=metrics,name=client
> at
> java.management/com.sun.jmx.mbeanserver.Repository.addMBean(Repository.java:436)
> at
> java.management/com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerWithRepository(DefaultMBeanServerInterceptor.java:1865)
> at
> java.management/com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerDynamicMBean(DefaultMBeanServerInterceptor.java:960)
> at
> java.management/com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerObject(DefaultMBeanServerInterceptor.java:895)
> at
> java.management/com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerMBean(DefaultMBeanServerInterceptor.java:320)
> at
> java.management/com.sun.jmx.mbeanserver.JmxMBeanServer.registerMBean(JmxMBeanServer.java:523)
> at
> org.apache.ignite.internal.metrics.exporters.jmx.JmxExporter.register(JmxExporter.java:123)
> at
> org.apache.ignite.internal.metrics.exporters.jmx.JmxExporter.start(JmxExporter.java:73)
> {code}
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