我正在尝试使用memcached用于Hibernate 2级缓存，但还没有能够让它工作。我遇到了以下异常(java.lang。当我启动tomcat并启动我的应用程序时，NoClassDefFoundError: org/hibernate/cache/TimestampsRegion):
javax.servlet.ServletException: Servlet execution threw an exception
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:313)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:119)
at com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:55)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.xxx.webapp.filter.MemberFilter.doFilter(MemberFilter.java:70)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.xxx.webapp.filter.AuthFilter.doFilter(AuthFilter.java:167)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.displaytag.filter.ResponseOverrideFilter.doFilter(ResponseOverrideFilter.java:125)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.xxx.webapp.filter.LanguageHandlingFilter.doFilter(LanguageHandlingFilter.java:129)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.xxx.webapp.filter.SsoFilter.doFilter(SsoFilter.java:72)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.xxx.webapp.filter.SessionStatusFilter.doFilter(SessionStatusFilter.java:41)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.xxx.webapp.filter.BlackListFilter.doFilter(BlackListFilter.java:36)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.xxx.webapp.filter.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:143)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:470)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:602)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:680)
Caused by: java.lang.NoClassDefFoundError: org/hibernate/cache/TimestampsRegion
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:247)
at org.hibernate.service.classloading.internal.ClassLoaderServiceImpl.classForName(ClassLoaderServiceImpl.java:138)
at org.hibernate.cfg.SettingsFactory.createRegionFactory(SettingsFactory.java:393)
at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:264)
at org.hibernate.cfg.Configuration.buildSettingsInternal(Configuration.java:2283)
at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2279)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1748)
at org.hibernate.ejb.EntityManagerFactoryImpl.<init>(EntityManagerFactoryImpl.java:94)
atorg.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:905)
at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:890)
at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:57)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:63)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:47)
我使用JPA与hibernate 4.1.7作为提供者。hibernate L2缓存的persistence.xml属性如下:
<property name="hibernate.cache.provider_class" value="com.googlecode.hibernate.memcached.MemcachedCacheProvider" />
<property name="hibernate.cache.use_second_level_cache" value="true" />
<property name="hibernate.cache.region.factory_class" value="com.googlecode.hibernate.memcached.MemcachedRegionFactory"/>
<property name="hibernate.cache.use_query_cache" value="true" />
<property name="hibernate.Memcached.servers" value="localhost:11211"/>
<property name="hibernate.Memcached.cacheTimeSeconds" value="300"/>
我正在使用以下与hibernate和memcached相关的jar文件版本:
memcached-2.3.1.jarHibernate-memcached-1.6.jar(编译自com. googlcode .hibernate.memcached项目的源代码)slf4j-1.5.0.jarslf4j-log4j12-1.5.0.jar
我还没能解决这个问题。非常感谢你们的帮助。
阿伦
我知道这是三年前的事了，但这仍然很有意义。您可以在Hibernate 4和5中使用memcached(或任何memcache克隆，如elasticache)。我们自己也是这样做的。
你可以通过gradle依赖项获得合适的jar:
compile 'com.github.mihaicostin:hibernate-l2-memcached:1.1.0'
或Maven:
<groupId>com.github.mihaicostin</groupId>
<artifactId>hibernate-l2-memcached</artifactId>
<version>1.1.0</version>
它是最新的，工作得很好。github上的开源。https://github.com/mihaicostin/hibernate-l2-memcached
作为一个例子，我们在Bjond的persistence.xml中的一个片段。注意，您需要该区域factory:
<property name="hibernate.dialect" value="com.bjond.persistence.converter.JsonPostgreSQLDialect"/>
<property name="hibernate.transaction.jta.platform" value="org.hibernate.service.jta.platform.internal.JBossAppServerJtaPlatform" />
<property name="hibernate.temp.use_jdbc_metadata_defaults" value="false"/>
<property name="hibernate.cache.use_second_level_cache" value="true" />
<property name="hibernate.cache.use_query_cache" value="true" />
<property name="hibernate.memcached.REGION.cacheTimeSeconds" value="30"/>
<property name="hibernate.cache.region.factory_class" value="com.mc.hibernate.memcached.MemcachedRegionFactory"/>
<property name="hibernate.memcached.operationTimeout" value="5000"/>
<property name="hibernate.memcached.connectionFactory" value="KetamaConnectionFactory"/>
<property name="hibernate.memcached.hashAlgorithm" value="HashAlgorithm.FNV1_64_HASH"/>
<property name="hibernate.memcached.servers" value="localhost:11211"/>
<property name="hibernate.memcached.cacheTimeSeconds" value="300"/>
<property name="hibernate.memcached.clearSupported" value="false"/>
<property name="hibernate.transaction.manager_lookup_class" value="org.hibernate.transaction.JBossTransactionManagerLookup"/>
<property name="hibernate.transaction.factory_class" value="org.hibernate.transaction.CMTTransactionFactory"/>
<property name="hibernate.generate_statistics" value="true" />
听起来您正在使用Hibernate 4。要使用hibernate-memcached，您应该有HB3。查看hibernate-memcached配置:https://code.google.com/p/hibernate-memcached/wiki/Configuration