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https://issues.apache.org/jira/browse/SLING-13251?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Julian Sedding resolved SLING-13251.
------------------------------------
Fix Version/s: Engine 3.0.4
Resolution: Fixed
> MBean registration in ServletFilterManager fails for factory components
> -----------------------------------------------------------------------
>
> Key: SLING-13251
> URL: https://issues.apache.org/jira/browse/SLING-13251
> Project: Sling
> Issue Type: Bug
> Components: Engine
> Affects Versions: Engine 2.16.8
> Reporter: Julian Sedding
> Assignee: Julian Sedding
> Priority: Minor
> Fix For: Engine 3.0.4
>
>
> When multiple servlet {{Filter}} components are registered via factory
> configurations, JMX MBean registration fails with an
> {{InstanceAlreadyExistsException}} (see below).
> This happens, because the MBean name is derived from the {{component.name}}
> property before the {{service.pid}} property. The {{component.name}} is the
> same for multiple configurations of the same component, while the
> {{service.pid}} reflects the factory configuration's {{name}} in addition to
> the {{component.name}}.
> E.g.
> {{service.pid}}:
> com.adobe.cq.wcm.core.components.internal.servlets.TableOfContentsFilter~commons
> {{component.name}}:
> com.adobe.cq.wcm.core.components.internal.servlets.TableOfContentsFilter
> Preferring the {{service.pid}}, if present, should resolve this issue.
> {noformat}
> 2026-06-16 11:56:22.096 ERROR [SlingServletContext-registration]
> org.apache.aries.jmx.whiteboard.MBeanHolder register: Failure registering
> MBean org.apache.sling.engine.impl.filter.FilterProcessorMBeanImpl@4333330f
> javax.management.InstanceAlreadyExistsException:
> org.apache.sling:type=engine-filter,service=com.adobe.cq.wcm.core.components.internal.servlets.TableOfContentsFilter
> at
> java.management/com.sun.jmx.mbeanserver.Repository.addMBean(Repository.java:322)
> at
> java.management/com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerWithRepository(DefaultMBeanServerInterceptor.java:1848)
> at
> java.management/com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerDynamicMBean(DefaultMBeanServerInterceptor.java:945)
> at
> java.management/com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerObject(DefaultMBeanServerInterceptor.java:880)
> at
> java.management/com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerMBean(DefaultMBeanServerInterceptor.java:315)
> at
> java.management/com.sun.jmx.mbeanserver.JmxMBeanServer.registerMBean(JmxMBeanServer.java:523)
> at
> org.apache.aries.jmx.whiteboard.MBeanHolder.register(MBeanHolder.java:114)
> [org.apache.aries.jmx.whiteboard:1.2.0]
> at
> org.apache.aries.jmx.whiteboard.JmxWhiteboardSupport.registerMBean(JmxWhiteboardSupport.java:88)
> [org.apache.aries.jmx.whiteboard:1.2.0]
> at
> org.apache.aries.jmx.whiteboard.Activator$MBeanTracker.addingService(Activator.java:102)
> [org.apache.aries.jmx.whiteboard:1.2.0]
> at
> org.osgi.util.tracker.ServiceTracker$Tracked.customizerAdding(ServiceTracker.java:944)
> at
> org.osgi.util.tracker.ServiceTracker$Tracked.customizerAdding(ServiceTracker.java:872)
> at
> org.osgi.util.tracker.AbstractTracked.trackAdding(AbstractTracked.java:256)
> at org.osgi.util.tracker.AbstractTracked.track(AbstractTracked.java:229)
> at
> org.osgi.util.tracker.ServiceTracker$Tracked.serviceChanged(ServiceTracker.java:904)
> at
> org.apache.felix.framework.EventDispatcher.invokeServiceListenerCallback(EventDispatcher.java:990)
> at
> org.apache.felix.framework.EventDispatcher.fireEventImmediately(EventDispatcher.java:838)
> at
> org.apache.felix.framework.EventDispatcher.fireServiceEvent(EventDispatcher.java:545)
> at org.apache.felix.framework.Felix.fireServiceEvent(Felix.java:4863)
> at org.apache.felix.framework.Felix.registerService(Felix.java:3834)
> at
> org.apache.felix.framework.BundleContextImpl.registerService(BundleContextImpl.java:328)
> at
> org.apache.felix.framework.BundleContextImpl.registerService(BundleContextImpl.java:335)
> at
> org.apache.sling.engine.impl.filter.ServletFilterManager.initFilter(ServletFilterManager.java:170)
> [org.apache.sling.engine:2.16.6]
> at
> org.apache.sling.engine.impl.filter.ServletFilterManager.bindFilter(ServletFilterManager.java:135)
> [org.apache.sling.engine:2.16.6]
> [...]
> {noformat}
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