Exception in mancenter in tomcat

[santoshbmath]

It's a low priority issue since it is not shown in mancenter, the exception is thrown in tomcat console.

To reproduce,

1. Start mancenter & a member (only one member)
2. To go mancenter in browser
3. Stop a member (Now no members)
4. Now go to browser and click "Cluster Home". Following exception is thrown in tomcat console

java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl. java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces sorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at org.apache.commons.beanutils.MethodUtils.invokeMethod(MethodUtils.jav a:282)
at org.apache.commons.beanutils.MethodUtils.invokeMethod(MethodUtils.jav a:226)
at org.apache.commons.beanutils.MethodUtils.invokeMethod(MethodUtils.jav a:177)
at com.hazelcast.webmonitor.service.DataService.invokeMethod(DataService .java:75)
at com.hazelcast.webmonitor.service.DataService.getResponse(DataService. java:53)
at com.hazelcast.webmonitor.servlet.Main.doGet(Main.java:75)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl icationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF ilterChain.java:210)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51 )
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl icationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF ilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV alve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV alve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(Authentica torBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j ava:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j ava:100)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java: 953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal ve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav a:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp 11Processor.java:1041)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process( AbstractProtocol.java:603)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoin t.java:310)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor. java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor .java:603)
at java.lang.Thread.run(Thread.java:722)
Caused by: com.google.common.cache.CacheLoader$InvalidCacheLoadException: CacheL oader returned null for key dev.
at com.google.common.cache.LocalCache$Segment.waitForLoadingValue(LocalC ache.java:2335)
at com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache .java:2320)
at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2228)
at com.google.common.cache.LocalCache.get(LocalCache.java:3965)
at com.google.common.cache.LocalCache.getOrLoad(LocalCache.java:3969)
at com.google.common.cache.LocalCache$LocalManualCache.get(LocalCache.ja va:4829)
at com.hazelcast.webmonitor.service.CentralManager.getClusterProps(Centr alManager.java:135)
at com.hazelcast.webmonitor.service.DataService.clusterProps(DataService .java:408)
... 31 more

[eminn]

thanks for your report. this issue has been fixed and will be available to the next release.