我只是从 Activiti 网站本身下载了 activiti-app.war。并将其部署在 tomcat 9 上，但我在启动应用程序时出现此错误：
10:55:11,982 [main] INFO com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource - Initializing c3p0 pool... com.mchange.v2.c3p0.ComboPooledDataSource [ acquireIncrement -> 5, acquireRetryAttempts -> 30, acquireRetryDelay -> 1000, autoCommitOnClose -> false, automaticTestTable -> null, breakAfterAcquireFailure -> false, checkoutTimeout -> 0, connectionCustomizerClassName -> null, connectionTesterClassName -> com.mchange.v2.c3p0.impl.DefaultConnectionTester, dataSourceName -> z8kfltaf1in1xmreaflx|66ec4409, debugUnreturnedConnectionStackTraces -> false, description -> null, driverClass -> org.h2.Driver, factoryClassLocation -> null, forceIgnoreUnresolvedTransactions -> false, identityToken -> z8kfltaf1in1xmreaflx|66ec4409, idleConnectionTestPeriod -> 0, initialPoolSize -> 3, jdbcUrl -> jdbc:h2:mem:activiti;DB_CLOSE_DELAY=-1, maxAdministrativeTaskTime -> 0, maxConnectionAge -> 0, maxIdleTime -> 1800, maxIdleTimeExcessConnections -> 1800, maxPoolSize -> 100, maxStatements -> 0, maxStatementsPerConnection -> 0, minPoolSize -> 10, numHelperThreads -> 3, preferredTestQuery -> null, properties -> {password=******, user=******}, propertyCycle -> 0, statementCacheNumDeferredCloseThreads -> 0, testConnectionOnCheckin -> true, testConnectionOnCheckout -> true, unreturnedConnectionTimeout -> 0, userOverrides -> {}, usesTraditionalReflectiveProxies -> false ]
10:55:12,515 [main] ERROR org.activiti.app.conf.SecurityConfiguration - Could not configure authentication mechanism:
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dbAuthenticationProvider' defined in class path resource [org/activiti/app/conf/SecurityConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.security.authentication.AuthenticationProvider]: Circular reference involving containing bean 'securityConfiguration' - consider declaring the factory method as static for independence from its containing instance. Factory method 'dbAuthenticationProvider' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userDetailsService': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.activiti.app.service.api.UserCache org.activiti.app.security.UserDetailsService.userCache; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userCacheImpl': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: protected org.activiti.engine.IdentityService org.activiti.app.service.idm.UserCacheImpl.identityService; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'activitiEngineConfiguration': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.springframework.transaction.PlatformTransactionManager org.activiti.app.conf.ActivitiEngineConfiguration.transactionManager; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'transactionManager' defined in class path resource [org/activiti/app/conf/DatabaseConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.transaction.PlatformTransactionManager]: Factory method 'annotationDrivenTransactionManager' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/activiti/app/conf/DatabaseConfiguration.class]: Bean instantiation via factory method fail