Re: prevent registering JCSAdminBean multiple times

[Thomas Vandahl]

On 16.11.17 21:54, Tim Cronin wrote:
> we have a few webapps running on the same server that use JCS.
> 
> when moving the 2.x we started getting the following error on tomcat startup
> 
> 
> 
> javax.management.InstanceAlreadyExistsException:

It looks like you load multiple instances of CompositeCacheManager from
different class loaders. Setting the jmxName to different values is not
possible at the moment. This should be configurable. Would you please
open an issue on this.

Bye, Thomas.


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Re: prevent registering JCSAdminBean multiple times

[Romain Manni-Bucau]

Hi Tim

Setting the jmxName to null on the composite cache manager should do the
trick but depending the api you use is more or less easy. Can you have a
look?

Le 16 nov. 2017 21:54, "Tim Cronin"  a écrit :

we have a few webapps running on the same server that use JCS.

when moving the 2.x we started getting the following error on tomcat startup



javax.management.InstanceAlreadyExistsException:
org.apache.commons.jcs:type=JCSAdminBean
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.commons.jcs.engine.control.CompositeCacheManager.initialize(
CompositeCacheManager.java:271)
at
org.apache.commons.jcs.engine.control.CompositeCacheManager.getInstance(
CompositeCacheManager.java:185)
at
org.apache.commons.jcs.engine.control.CompositeCacheManager.getInstance(
CompositeCacheManager.java:161)
at org.apache.commons.jcs.JCS.getCacheManager(JCS.java:172)
at org.apache.commons.jcs.JCS.getInstance(JCS.java:190)
at com.outboundengine.cache.Cache.(Cache.java:42)
at com.outboundengine.cache.CacheManager.(CacheManager.java:37)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance(
NativeConstructorAccessorImpl.java:62)
at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(
DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)