Description:
Exception with following stacktrace suddenly shown. See screenshot attached (Firefox 3.0.5).
com.mysql.etools.monitor.pom.DBCPConnectionProvider.getConnection(DBCPConnectionProvider.java:308)
com.mysql.etools.monitor.pom.ConfigTimeConnectionProviderHolder.getConnection(ConfigTimeConnectionProviderHolder.java:73)
org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:423)
org.hibernate.jdbc.ConnectionManager.getConnection(ConnectionManager.java:144)
org.hibernate.jdbc.JDBCContext.connection(JDBCContext.java:119)
org.hibernate.transaction.JDBCTransaction.begin(JDBCTransaction.java:57)
org.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:1326)
sun.reflect.GeneratedMethodAccessor39.invoke(Unknown Source)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
java.lang.reflect.Method.invoke(Method.java:597)
org.hibernate.context.ThreadLocalSessionContext$TransactionProtectionWrapper.invoke(ThreadLocalSessionContext.java:301)
$Proxy29.beginTransaction(Unknown Source)
com.mysql.etools.monitor.pom.hib.HibernateExecutor.asTransaction(HibernateExecutor.java:185)
com.mysql.etools.monitor.pom.hib.HibPersistence.asTransaction(HibPersistence.java:553)
com.mysql.etools.monitor.pom.hib.HibInventoryObject.find(HibInventoryObject.java:311)
com.mysql.etools.monitor.pom.hib.HibInventoryObject.find(HibInventoryObject.java:307)
com.mysql.etools.monitor.pom.InvObj.find(InvObj.java:147)
com.mysql.etools.monitor.pom.InvObj.findString(InvObj.java:377)
com.mysql.etools.monitor.pom.InvObj.findString(InvObj.java:373)
com.mysql.etools.monitor.bo.FileSystem.findTypeName(FileSystem.java:95)
com.mysql.etools.monitor.bo.FileSystem.isLocal(FileSystem.java:107)
com.mysql.etools.monitor.bo.OperatingSystem.getLocalFileSystems(OperatingSystem.java:273)
com.mysql.merlin.ui.containers.OperatingSystemContainer.<init>(OperatingSystemContainer.java:102)
com.mysql.merlin.ui.containers.ServerContainer.<init>(ServerContainer.java:147)
com.mysql.merlin.ui.helper.UiManager.fromCache(UiManager.java:96)
com.mysql.merlin.ui.actions.BaseAction.getSelectedServer(BaseAction.java:1242)
com.mysql.merlin.ui.actions.monitor.dashboard.Dashboard.initSelectedServer(Dashboard.java:367)
com.mysql.merlin.ui.actions.monitor.dashboard.Dashboard.executeInner(Dashboard.java:165)
com.mysql.merlin.ui.actions.BaseViewAction.exec(BaseViewAction.java:35)
com.mysql.merlin.ui.actions.BaseAction$1.call(BaseAction.java:1728)
com.mysql.merlin.ui.actions.BaseAction$1.call(BaseAction.java:1727)
com.mysql.merlin.ui.actions.BaseAction.execute(BaseAction.java:1711)
com.mysql.merlin.ui.actions.BaseAction.execute(BaseAction.java:1726)
sun.reflect.GeneratedMethodAccessor191.invoke(Unknown Source)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
java.lang.reflect.Method.invoke(Method.java:597)
com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:404)
com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:267)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:229)
com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:167)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:86)
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:1)
com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:170)
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:1)
com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
com.mysql.merlin.ui.interceptors.InitializeInterceptor.intercept(InitializeInterceptor.java:82)
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:1)
com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:176)
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:1)
com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
com.mysql.merlin.ui.interceptors.AuthenticationInterceptor.intercept(AuthenticationInterceptor.java:118)
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:1)
com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:50)
org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:507)
org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:421)
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
net.sf.ehcache.constructs.web.filter.GzipFilter.doFilter(GzipFilter.java:75)
net.sf.ehcache.constructs.web.filter.Filter.doFilter(Filter.java:92)
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
com.mysql.util.RequestCounterFilter.doFilter(RequestCounterFilter.java:117)
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
com.mysql.merlin.ui.filters.AccessLogFilter.doFilter(AccessLogFilter.java:56)
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:263)
org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:852)
org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:584)
org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1508)
java.lang.Thread.run(Thread.java:619)
How to repeat:
Appeared without any preconditions.
Reconnect to MEM solved the problem.
Suggested fix:
no strange exceptions should be shown