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https://issues.apache.org/jira/browse/SLING-5070?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Carsten Ziegeler closed SLING-5070.
-----------------------------------

> ServletResolverCacheMBeanImpl throws NPE when cache is disabled
> ---------------------------------------------------------------
>
>                 Key: SLING-5070
>                 URL: https://issues.apache.org/jira/browse/SLING-5070
>             Project: Sling
>          Issue Type: Bug
>          Components: Servlets
>    Affects Versions: Servlets Resolver 2.3.6
>            Reporter: Dirk Rudolph
>            Assignee: Carsten Ziegeler
>            Priority: Minor
>             Fix For: Servlets Resolver 2.3.8
>
>
> When setting the cache size configuration of SlingServletResolver to a value 
> < 5 the cache will be disabled and therefor the member will be null. This 
> causes a NPE in the MBean. So either the MBean is able to handle this or it 
> will not be registered in that case.
> {code}
> Caused by: java.lang.NullPointerException: null
>         at 
> org.apache.sling.servlets.resolver.internal.SlingServletResolver$ServletResolverCacheMBeanImpl.getCacheSize(SlingServletResolver.java:1383)
>         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>         at 
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
>         at 
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>         at java.lang.reflect.Method.invoke(Method.java:497)
>         at sun.reflect.misc.Trampoline.invoke(MethodUtil.java:71)
>         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>         at 
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
>         at 
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>         at java.lang.reflect.Method.invoke(Method.java:497)
>         at sun.reflect.misc.MethodUtil.invoke(MethodUtil.java:275)
>         at 
> com.sun.jmx.mbeanserver.StandardMBeanIntrospector.invokeM2(StandardMBeanIntrospector.java:112)
>         at 
> com.sun.jmx.mbeanserver.StandardMBeanIntrospector.invokeM2(StandardMBeanIntrospector.java:46)
>         at 
> com.sun.jmx.mbeanserver.MBeanIntrospector.invokeM(MBeanIntrospector.java:237)
>         at 
> com.sun.jmx.mbeanserver.PerInterface.getAttribute(PerInterface.java:83)
>         at 
> com.sun.jmx.mbeanserver.MBeanSupport.getAttribute(MBeanSupport.java:206)
>         at javax.management.StandardMBean.getAttribute(StandardMBean.java:372)
>         at 
> com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.getAttribute(DefaultMBeanServerInterceptor.java:647)
>         ... 67 common frames omitted
> {code}



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