INFO warnings about multiple modules in Spring Boot, what do they mean?

Question

I recently bumped up my spring boot version to 1.4.0. Now I see the following warnings below. I am using spring-mongodb and spring-redis (strictly for caching). Is this something I should be concerned about?

Multiple Spring Data modules found, entering strict repository configuration mode!

Spring Data Redis - Could not safely identify store assignment for repository

What does strict repository configuration mode really mean?

    .   ____          _            __ _ _ /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \ ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \ \\/  ___)| |_)| | | | | || (_| |  ) ) ) ) '  |____| .__|_| |_|_| |_\__, | / / / / =========|_|==============|___/=/_/_/_/ :: Spring Boot ::        (v1.4.0.RELEASE)  2016-09-11 00:03:11.234  INFO 24766 --- [           main] testapp.Application                     : Starting Application on macbookhome with PID 24766 (/Users/me/Code/testapp/testapp-svc/build/classes/main started by me in /Users/me/Code/testapp/testapp-svc) 2016-09-11 00:03:11.238  INFO 24766 --- [           main] testapp.Application                     : The following profiles are active: default 2016-09-11 00:03:11.319  INFO 24766 --- [           main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@7393222f: startup date [Sun Sep 11 00:03:11 EDT 2016]; root of context hierarchy 2016-09-11 00:03:14.092  INFO 24766 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Multiple Spring Data modules found, entering strict repository configuration mode! 2016-09-11 00:03:14.275  INFO 24766 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Multiple Spring Data modules found, entering strict repository configuration mode! 2016-09-11 00:03:14.346  INFO 24766 --- [           main] .RepositoryConfigurationExtensionSupport : Spring Data Redis - Could not safely identify store assignment for repository candidate interface testapp.repositories.topics.TopicRepository. 2016-09-11 00:03:14.349  INFO 24766 --- [           main] .RepositoryConfigurationExtensionSupport : Spring Data Redis - Could not safely identify store assignment for repository candidate interface testapp.repositories.entries.EntryRepository. 2016-09-11 00:03:14.350  INFO 24766 --- [           main] .RepositoryConfigurationExtensionSupport : Spring Data Redis - Could not safely identify store assignment for repository candidate interface testapp.repositories.AppSettingsRepository. 2016-09-11 00:03:14.351  INFO 24766 --- [           main] .RepositoryConfigurationExtensionSupport : Spring Data Redis - Could not safely identify store assignment for repository candidate interface testapp.repositories.UserRepository. 2016-09-11 00:03:14.353  INFO 24766 --- [           main] .RepositoryConfigurationExtensionSupport : Spring Data Redis - Could not safely identify store assignment for repository candidate interface testapp.repositories.BookmarkRepository. 2016-09-11 00:03:14.354  INFO 24766 --- [           main] .RepositoryConfigurationExtensionSupport : Spring Data Redis - Could not safely identify store assignment for repository candidate interface testapp.repositories.FlagRepository. 2016-09-11 00:03:14.356  INFO 24766 --- [           main] .RepositoryConfigurationExtensionSupport : Spring Data Redis - Could not safely identify store assignment for repository candidate interface testapp.repositories.FollowRepository. 2016-09-11 00:03:14.360  INFO 24766 --- [           main] .RepositoryConfigurationExtensionSupport : Spring Data Redis - Could not safely identify store assignment for repository candidate interface testapp.repositories.entries.UserEntryRepository. 2016-09-11 00:03:14.361  INFO 24766 --- [           main] .RepositoryConfigurationExtensionSupport : Spring Data Redis - Could not safely identify store assignment for repository candidate interface testapp.repositories.ShareRepository. 2016-09-11 00:03:14.899  INFO 24766 --- [           main] trationDelegate$BeanPostProcessorChecker : Bean 'springAsyncConfiguration' of type [class testapp.configuration.SpringAsyncConfiguration$$EnhancerBySpringCGLIB$$2ae6dc36] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 2016-09-11 00:03:14.923  INFO 24766 --- [           main] o.s.s.concurrent.ThreadPoolTaskExecutor  : Initializing ExecutorService  2016-09-11 00:03:14.939  INFO 24766 --- [           main] o.s.s.concurrent.ThreadPoolTaskExecutor  : Initializing ExecutorService  'taskExecutor' 2016-09-11 00:03:14.939  INFO 24766 --- [           main] trationDelegate$BeanPostProcessorChecker : Bean 'taskExecutor' of type [class org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 2016-09-11 00:03:15.026  INFO 24766 --- [           main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.cache.annotation.ProxyCachingConfiguration' of type [class org.springframework.cache.annotation.ProxyCachingConfiguration$$EnhancerBySpringCGLIB$$26a81448] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 2016-09-11 00:03:15.658  INFO 24766 --- [           main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8080 (http) 2016-09-11 00:03:15.674  INFO 24766 --- [           main] o.apache.catalina.core.StandardService   : Starting service Tomcat 2016-09-11 00:03:15.675  INFO 24766 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet Engine: Apache Tomcat/8.5.4 2016-09-11 00:03:15.801  INFO 24766 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext 2016-09-11 00:03:15.801  INFO 24766 --- [ost-startStop-1] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 4487 ms 2016-09-11 00:03:16.334  INFO 24766 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'metricFilter' to: [/*] 2016-09-11 00:03:16.335  INFO 24766 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'characterEncodingFilter' to: [/*] 2016-09-11 00:03:16.335  INFO 24766 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'hiddenHttpMethodFilter' to: [/*] 2016-09-11 00:03:16.335  INFO 24766 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'httpPutFormContentFilter' to: [/*] 2016-09-11 00:03:16.336  INFO 24766 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'requestContextFilter' to: [/*] 2016-09-11 00:03:16.339  INFO 24766 --- [ost-startStop-1] .s.DelegatingFilterProxyRegistrationBean : Mapping filter: 'springSecurityFilterChain' to: [/*] 2016-09-11 00:03:16.339  INFO 24766 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'webRequestLoggingFilter' to: [/*] 2016-09-11 00:03:16.340  INFO 24766 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'applicationContextIdFilter' to: [/*] 2016-09-11 00:03:16.341  INFO 24766 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean  : Mapping servlet: 'dispatcherServlet' to [/] 2016-09-11 00:03:17.075  INFO 24766 --- [           main] org.mongodb.driver.cluster               : Cluster created with settings {hosts=[ds041094-a0.mongolab.com:41094, ds041094-a1.mongolab.com:41094], mode=MULTIPLE, requiredClusterType=UNKNOWN, serverSelectionTimeout='30000 ms', maxWaitQueueSize=500} 2016-09-11 00:03:17.075  INFO 24766 --- [           main] org.mongodb.driver.cluster               : Adding discovered server ds041094-a0.mongolab.com:41094 to client view of cluster 2016-09-11 00:03:17.100  INFO 24766 --- [           main] org.mongodb.driver.cluster               : Adding discovered server ds041094-a1.mongolab.com:41094 to client view of cluster 2016-09-11 00:03:17.863  INFO 24766 --- [golab.com:41094] org.mongodb.driver.connection            : Opened connection [connectionId{localValue:2, serverValue:976946}] to ds041094-a0.mongolab.com:41094 2016-09-11 00:03:17.888  INFO 24766 --- [golab.com:41094] org.mongodb.driver.cluster               : Monitor thread successfully connected to server with description ServerDescription{address=ds041094-a0.mongolab.com:41094, type=REPLICA_SET_PRIMARY, state=CONNECTED, ok=true, version=ServerVersion{versionList=[3, 0, 7]}, minWireVersion=0, maxWireVersion=3, maxDocumentSize=16777216, roundTripTimeNanos=24085956, setName='rs-ds041094', canonicalAddress=ds041094-a0.mongolab.com:41094, hosts=[ds041094-a0.mongolab.com:41094, ds041094-a1.mongolab.com:41094], passives=[], arbiters=[ds041094-ar0.mongolab.com:41094], primary='ds041094-a0.mongolab.com:41094', tagSet=TagSet{[]}, electionId=5736155bb89bc895bfdb9c2f, setVersion=3} 2016-09-11 00:03:17.890  INFO 24766 --- [golab.com:41094] org.mongodb.driver.cluster               : Discovered cluster type of REPLICA_SET 2016-09-11 00:03:17.890  INFO 24766 --- [golab.com:41094] org.mongodb.driver.cluster               : Adding discovered server ds041094-ar0.mongolab.com:41094 to client view of cluster 2016-09-11 00:03:17.891  INFO 24766 --- [golab.com:41094] org.mongodb.driver.connection            : Opened connection [connectionId{localValue:1, serverValue:1178641}] to ds041094-a1.mongolab.com:41094 2016-09-11 00:03:17.892  INFO 24766 --- [golab.com:41094] org.mongodb.driver.cluster               : Setting max election id to 5736155bb89bc895bfdb9c2f from replica set primary ds041094-a0.mongolab.com:41094 2016-09-11 00:03:17.892  INFO 24766 --- [golab.com:41094] org.mongodb.driver.cluster               : Setting max set version to 3 from replica set primary ds041094-a0.mongolab.com:41094 2016-09-11 00:03:17.892  INFO 24766 --- [golab.com:41094] org.mongodb.driver.cluster               : Discovered replica set primary ds041094-a0.mongolab.com:41094 2016-09-11 00:03:17.943  INFO 24766 --- [golab.com:41094] org.mongodb.driver.cluster               : Monitor thread successfully connected to server with description ServerDescription{address=ds041094-a1.mongolab.com:41094, type=REPLICA_SET_SECONDARY, state=CONNECTED, ok=true, version=ServerVersion{versionList=[3, 0, 7]}, minWireVersion=0, maxWireVersion=3, maxDocumentSize=16777216, roundTripTimeNanos=51084368, setName='rs-ds041094', canonicalAddress=ds041094-a1.mongolab.com:41094, hosts=[ds041094-a0.mongolab.com:41094, ds041094-a1.mongolab.com:41094], passives=[], arbiters=[ds041094-ar0.mongolab.com:41094], primary='ds041094-a0.mongolab.com:41094', tagSet=TagSet{[]}, electionId=null, setVersion=3} 2016-09-11 00:03:18.108  INFO 24766 --- [golab.com:41094] org.mongodb.driver.connection            : Opened connection [connectionId{localValue:3, serverValue:2200709}] to ds041094-ar0.mongolab.com:41094 2016-09-11 00:03:18.155  INFO 24766 --- [golab.com:41094] org.mongodb.driver.cluster               : Monitor thread successfully connected to server with description ServerDescription{address=ds041094-ar0.mongolab.com:41094, type=REPLICA_SET_ARBITER, state=CONNECTED, ok=true, version=ServerVersion{versionList=[3, 0, 7]}, minWireVersion=0, maxWireVersion=3, maxDocumentSize=16777216, roundTripTimeNanos=46937906, setName='rs-ds041094', canonicalAddress=ds041094-ar0.mongolab.com:41094, hosts=[ds041094-a0.mongolab.com:41094, ds041094-a1.mongolab.com:41094], passives=[], arbiters=[ds041094-ar0.mongolab.com:41094], primary='ds041094-a0.mongolab.com:41094', tagSet=TagSet{[]}, electionId=null, setVersion=3} 2016-09-11 00:03:18.357  INFO 24766 --- [           main] org.mongodb.driver.connection            : Opened connection [connectionId{localValue:4, serverValue:976947}] to ds041094-a0.mongolab.com:41094 2016-09-11 00:03:20.185  INFO 24766 --- [           main] o.s.s.web.DefaultSecurityFilterChain     : Creating filter chain: OrRequestMatcher [requestMatchers=[Ant [pattern='/css/**'], Ant [pattern='/js/**'], Ant [pattern='/images/**'], Ant [pattern='/webjars/**'], Ant [pattern='/**/favicon.ico'], Ant [pattern='/error']]], [] 2016-09-11 00:03:20.186  INFO 24766 --- [           main] o.s.s.web.DefaultSecurityFilterChain     : Creating filter chain: Ant [pattern='/health'], [] 2016-09-11 00:03:20.186  INFO 24766 --- [           main] o.s.s.web.DefaultSecurityFilterChain     : Creating filter chain: Ant [pattern='/1.0/users/auth0/userInfo'], [] 2016-09-11 00:03:20.186  INFO 24766 --- [           main] o.s.s.web.DefaultSecurityFilterChain     : Creating filter chain: Ant [pattern='/1.0/users/username/valid'], [] 2016-09-11 00:03:20.314  INFO 24766 --- [           main] o.s.s.web.DefaultSecurityFilterChain     : Creating filter chain: org.springframework.security.web.util.matcher.AnyRequestMatcher@1, [org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter@7cd3860, org.springframework.security.web.context.SecurityContextPersistenceFilter@3601549f, org.springframework.security.web.header.HeaderWriterFilter@4e789704, org.springframework.security.web.authentication.logout.LogoutFilter@18f4086e, org.springframework.security.web.authentication.www.BasicAuthenticationFilter@228958a, org.springframework.security.web.savedrequest.RequestCacheAwareFilter@1b9c716f, org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter@22854f2b, org.springframework.security.web.authentication.AnonymousAuthenticationFilter@44f23927, org.springframework.security.web.session.SessionManagementFilter@1e6bd367, org.springframework.security.web.access.ExceptionTranslationFilter@3205610d, org.springframework.security.web.access.intercept.FilterSecurityInterceptor@5b2ff4df] 2016-09-11 00:03:20.323  INFO 24766 --- [           main] o.s.s.web.DefaultSecurityFilterChain     : Creating filter chain: org.springframework.boot.actuate.autoconfigure.ManagementWebSecurityAutoConfiguration$LazyEndpointPathRequestMatcher@253b1cbd, [org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter@a859c5, org.springframework.security.web.context.SecurityContextPersistenceFilter@c335b9, org.springframework.security.web.header.HeaderWriterFilter@87fc0fc, org.springframework.security.web.authentication.logout.LogoutFilter@1e66bf2d, org.springframework.security.web.authentication.www.BasicAuthenticationFilter@75f2ff80, org.springframework.security.web.savedrequest.RequestCacheAwareFilter@75c8d8e7, org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter@3c68e82, org.springframework.security.web.authentication.AnonymousAuthenticationFilter@37083af6, org.springframework.security.web.session.SessionManagementFilter@671f545b, org.springframework.security.web.access.ExceptionTranslationFilter@74a03bd5, org.springframework.security.web.access.intercept.FilterSecurityInterceptor@3831f4c2] 2016-09-11 00:03:20.642  INFO 24766 --- [           main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@7393222f: startup date [Sun Sep 11 00:03:11 EDT 2016]; root of context hierarchy 2016-09-11 00:03:20.746  INFO 24766 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/info],methods=[GET],produces=[application/json]}" onto public java.util.HashMap<java.lang.String, java.lang.String> testapp.controllers.AppInfoController.getAppInfo() 2016-09-11 00:03:20.789  INFO 24766 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/1.0/topics/user/{username}],methods=[GET]}" onto public org.springframework.data.domain.Page<testapp.models.Topic> testapp.controllers.api.v1.topic.TopicController.getTopicsByCategory(java.lang.String,java.lang.String,int,int,java.lang.String,java.lang.String,javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse) 2016-09-11 00:03:20.791  INFO 24766 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error]}" onto public org.springframework.http.ResponseEntity<java.util.Map<java.lang.String, java.lang.Object>> org.springframework.boot.autoconfigure.web.BasicErrorController.error(javax.servlet.http.HttpServletRequest) 2016-09-11 00:03:20.792  INFO 24766 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error],produces=[text/html]}" onto public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web.BasicErrorController.errorHtml(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse) 2016-09-11 00:03:20.938  INFO 24766 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler] 2016-09-11 00:03:20.939  INFO 24766 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler] 2016-09-11 00:03:20.988  INFO 24766 --- [           main] .m.m.a.ExceptionHandlerExceptionResolver : Detected @ExceptionHandler methods in testappSvcExceptionHandler 2016-09-11 00:03:21.046  INFO 24766 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler] 2016-09-11 00:03:21.755  INFO 24766 --- [           main] o.s.b.a.e.mvc.EndpointHandlerMapping     : Mapped "{[/health || /health.json],produces=[application/json]}" onto public java.lang.Object org.springframework.boot.actuate.endpoint.mvc.HealthMvcEndpoint.invoke(java.security.Principal) 2016-09-11 00:03:21.759  INFO 24766 --- [           main] o.s.b.a.e.mvc.EndpointHandlerMapping     : Mapped "{[/metrics/{name:.*}],methods=[GET],produces=[application/json]}" onto public java.lang.Object org.springframework.boot.actuate.endpoint.mvc.MetricsMvcEndpoint.value(java.lang.String) 2016-09-11 00:03:21.759  INFO 24766 --- [           main] o.s.b.a.e.mvc.EndpointHandlerMapping     : Mapped "{[/metrics || /metrics.json],methods=[GET],produces=[application/json]}" onto public java.lang.Object org.springframework.boot.actuate.endpoint.mvc.EndpointMvcAdapter.invoke() 2016-09-11 00:03:22.047  INFO 24766 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Registering beans for JMX exposure on startup 2016-09-11 00:03:22.061  INFO 24766 --- [           main] o.s.c.support.DefaultLifecycleProcessor  : Starting beans in phase 0 2016-09-11 00:03:22.193  INFO 24766 --- [           main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8080 (http) 2016-09-11 00:03:22.234  INFO 24766 --- [           main] testapp.Application                     : Started Application in 11.601 seconds (JVM running for 12.241) 2016-09-11 00:06:17.685  INFO 24766 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring FrameworkServlet 'dispatcherServlet' 2016-09-11 00:06:17.685  INFO 24766 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : FrameworkServlet 'dispatcherServlet': initialization started 2016-09-11 00:06:17.719  INFO 24766 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : FrameworkServlet 'dispatcherServlet': initialization completed in 34 ms 

Answer 1

If you are using redis implementing your own persistence layer, you are not using the interface that extends CrudRepository.

That was my case, I just deactivated the redis repositories search and the message below disappeared from my JPA repositories.

Spring Data Redis - Could not safely identify store assignment for repository candidate interface

To disable redis repositories set to false in application.properties:

spring.data.redis.repositories.type = none 

In older versions: .repositories.enabled = false

This is already a relief because for many JPA repositories this is pretty annoying.

Answer 2

There is a whole section about in the documents:

http://docs.spring.io/spring-data/jpa/docs/current/reference/html/#repositories.multiple-modules

Basically if you are using the generic interfaces (e.g. CrudRepository) then Spring won't know if you want that repository to be backed on the spring-mongodb or spring-redis data modules.