I think the important part of the error is here:
... 41 more Caused by: net.sf.ehcache.CacheException: Cannot parseConfiguration CacheManager. Attempt to create a new instance of CacheManager using the diskStorePath "/tmp/cache" which is already used by an existing CacheManager. The source of the configuration was classpath. at net.sf.ehcache.CacheManager.configure(CacheManager.java:248) at net.sf.ehcache.CacheManager.init(CacheManager.java:193) at net.sf.ehcache.CacheManager.<init>(CacheManager.java:180) at org.hibernate.cache.EhCacheProvider.start(EhCacheProvider.java:124) It seems like there are two session factories being started up which are configured to use the same cache. This could be because you have two web apps on the same machine each using hibernate. I don't think that flex would be trying to create two SessionFactories unless you were using more than one hibernate configuration file. Flex should share one session factory from all destinations which use the same hibernate configuration file. There must be some way to set the path name of the cache... maybe you just need to specify a different path name for this cache for the FDMS version of hibernate? Jeff ________________________________ From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of Niko Schmuck Sent: Wednesday, December 06, 2006 8:18 AM To: [email protected] Subject: [flexcoders] FDS: Using Hibernate second-level cache possible? Hi together, As a newbie I would like to get your advices on how to use the Hibernate caching for Flex Data Management Services. Is this possible at all or a contra-diction to the HibernateAssembler? For my java applications I currently use second-level caching to speed up data access with Hibernate (3.2), which I would also like to use for my Flex app: For this I use in the Hibernate mapping definition (inside the class element): <cache usage="read-write"/> Unfortunately if I turn EhCache on (via the hibernate configuration) ... <property name="cache.provider_class">org.hibernate.cache.EhCacheProvider</propert y> ... the tomcat logs show an ugly stack-trace: CacheException: Attempt to restart an already started EhCacheProvider. See below for the exception in its full-length beauty. The only way to overcome this, to avoid caching at all by setting: <property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</propert y> (Also using the recommended SingletonEhCacheProvider does not help) Any help much appreciated. Thanks, Niko 2006-12-05 08:57:08,737 [main] ERROR org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/useradmi n] - Servlet /useradmin threw load() exception java.lang.ExceptionInInitializerError at flex.data.assemblers.HibernateManager.createSessionFactory(HibernateMana ger.java:66) at flex.data.assemblers.HibernateManager.<init>(HibernateManager.java:44) at flex.data.assemblers.HibernateAssembler.initialize(HibernateAssembler.ja va:137) at flex.messaging.factories.JavaFactory$JavaFactoryInstance.createInstance( JavaFactory.java:254) at flex.messaging.factories.JavaFactory.createFactoryInstance(JavaFactory.j ava:93) at flex.messaging.FactoryDestination.getFactoryInstance(FactoryDestination. java:76) at flex.data.adapters.JavaAdapter.server(JavaAdapter.java:158) at flex.data.adapters.JavaAdapter.setSettings(JavaAdapter.java:119) at flex.messaging.Destination.createAdapter(Destination.java:279) at flex.messaging.Destination.initDestination(Destination.java:103) at flex.messaging.FactoryDestination.initDestination(FactoryDestination.jav a:58) at flex.data.DataService.createDestination(DataService.java:90) at flex.messaging.services.AbstractService.createDestinations(AbstractServi ce.java:82) at flex.messaging.config.MessagingConfiguration.createServices(MessagingCon figuration.java:187) at flex.messaging.config.MessagingConfiguration.configureBroker(MessagingCo nfiguration.java:84) at flex.messaging.MessageBrokerServlet.init(MessageBrokerServlet.java:105) at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.jav a:1105) at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:932) at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.j ava:3951) at org.apache.catalina.core.StandardContext.start(StandardContext.java:4225 ) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.ja va:759) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:739) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:524) at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java: 608) at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java :535) at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:470) at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1122) at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:31 0) at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSu pport.java:119) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1021) at org.apache.catalina.core.StandardHost.start(StandardHost.java:718) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1013) at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:442) at org.apache.catalina.core.StandardService.start(StandardService.java:450) at org.apache.catalina.core.StandardServer.start(StandardServer.java:709) at org.apache.catalina.startup.Catalina.start(Catalina.java:551) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.jav a:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor Impl.java:25) at java.lang.reflect.Method.invoke(Method.java:585) at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:294) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:432) Caused by: org.hibernate.cache.CacheException: Attempt to restart an already started EhCacheProvider. Use sessionFactory.close() between repeated calls to buildSessionFactory. Consider using net.sf.ehcache.hibernate.SingletonEhCacheProvider. at org.hibernate.cache.EhCacheProvider.start(EhCacheProvider.java:134) at org.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryImpl.java:183 ) at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1 218) at flex.data.assemblers.HibernateManager.createSessionFactory(HibernateMana ger.java:61) ... 41 more Caused by: net.sf.ehcache.CacheException: Cannot parseConfiguration CacheManager. Attempt to create a new instance of CacheManager using the diskStorePath "/tmp/cache" which is already used by an existing CacheManager. The source of the configuration was classpath. at net.sf.ehcache.CacheManager.configure(CacheManager.java:248) at net.sf.ehcache.CacheManager.init(CacheManager.java:193) at net.sf.ehcache.CacheManager.<init>(CacheManager.java:180) at org.hibernate.cache.EhCacheProvider.start(EhCacheProvider.java:124) ... 44 more
