When connecting to the server from the client using `localhost`, an error message `Login successful but websocket connection failed` will be displayed.

[tiandic]

My steps are as follows:

1. Start the server:

PS D:\a> java --version
java 21.0.5 2024-10-15 LTS
Java(TM) SE Runtime Environment (build 21.0.5+9-LTS-239)
Java HotSpot(TM) 64-Bit Server VM (build 21.0.5+9-LTS-239, mixed mode, sharing)
PS D:\a> java -jar ClipCascade-Server-JRE_21.jar

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/

 :: Spring Boot ::                (v3.4.8)

2025-10-19T09:49:14.970+08:00  INFO 9200 --- [ClipCascade] [           main] c.a.clipcascade.ClipCascadeApplication   : Starting ClipCascadeApplication vServer-JRE_21 using Java 21.0.5 with PID 9200 (D:\a\ClipCascade-Server-JRE_21.jar started by a in D:\a)
2025-10-19T09:49:14.989+08:00  INFO 9200 --- [ClipCascade] [           main] c.a.clipcascade.ClipCascadeApplication   : No active profile set, falling back to 1 default profile: "default"
2025-10-19T09:49:18.388+08:00  INFO 9200 --- [ClipCascade] [           main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode.
2025-10-19T09:49:19.096+08:00  INFO 9200 --- [ClipCascade] [           main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 652 ms. Found 2 JPA repository interfaces.
2025-10-19T09:49:21.405+08:00  INFO 9200 --- [ClipCascade] [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port 8080 (http)
2025-10-19T09:49:21.464+08:00  INFO 9200 --- [ClipCascade] [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2025-10-19T09:49:21.472+08:00  INFO 9200 --- [ClipCascade] [           main] o.apache.catalina.core.StandardEngine    : Starting Servlet engine: [Apache Tomcat/10.1.43]
2025-10-19T09:49:21.606+08:00  INFO 9200 --- [ClipCascade] [           main] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2025-10-19T09:49:21.608+08:00  INFO 9200 --- [ClipCascade] [           main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 6335 ms
2025-10-19T09:49:22.029+08:00  INFO 9200 --- [ClipCascade] [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Starting...
2025-10-19T09:49:23.614+08:00  INFO 9200 --- [ClipCascade] [           main] com.zaxxer.hikari.pool.HikariPool        : HikariPool-1 - Added connection conn0: url=jdbc:h2:file:./database/clipcascade user=CLIPCASCADE
2025-10-19T09:49:23.630+08:00  INFO 9200 --- [ClipCascade] [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Start completed.
2025-10-19T09:49:24.164+08:00  INFO 9200 --- [ClipCascade] [           main] o.hibernate.jpa.internal.util.LogHelper  : HHH000204: Processing PersistenceUnitInfo [name: default]
2025-10-19T09:49:24.614+08:00  INFO 9200 --- [ClipCascade] [           main] org.hibernate.Version                    : HHH000412: Hibernate ORM core version 6.6.22.Final
2025-10-19T09:49:24.871+08:00  INFO 9200 --- [ClipCascade] [           main] o.h.c.internal.RegionFactoryInitiator    : HHH000026: Second-level cache disabled
2025-10-19T09:49:26.795+08:00  INFO 9200 --- [ClipCascade] [           main] o.s.o.j.p.SpringPersistenceUnitInfo      : No LoadTimeWeaver setup: ignoring JPA class transformer
2025-10-19T09:49:27.034+08:00  WARN 9200 --- [ClipCascade] [           main] org.hibernate.orm.deprecation            : HHH90000025: H2Dialect does not need to be specified explicitly using 'hibernate.dialect' (remove the property setting and it will be selected by default)
2025-10-19T09:49:27.098+08:00  INFO 9200 --- [ClipCascade] [           main] org.hibernate.orm.connections.pooling    : HHH10001005: Database info:
        Database JDBC URL [Connecting through datasource 'HikariDataSource (HikariPool-1)']
        Database driver: undefined/unknown
        Database version: 2.3.232
        Autocommit mode: undefined/unknown
        Isolation level: undefined/unknown
        Minimum pool size: undefined/unknown
        Maximum pool size: undefined/unknown
2025-10-19T09:49:30.767+08:00  INFO 9200 --- [ClipCascade] [           main] o.h.e.t.j.p.i.JtaPlatformInitiator       : HHH000489: No JTA platform available (set 'hibernate.transaction.jta.platform' to enable JTA platform integration)
2025-10-19T09:49:30.968+08:00  INFO 9200 --- [ClipCascade] [           main] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2025-10-19T09:49:33.142+08:00  INFO 9200 --- [ClipCascade] [           main] o.s.d.j.r.query.QueryEnhancerFactory     : Hibernate is in classpath; If applicable, HQL parser will be used.
2025-10-19T09:49:39.933+08:00  WARN 9200 --- [ClipCascade] [           main] JpaBaseConfiguration$JpaWebConfiguration : spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning
2025-10-19T09:49:40.252+08:00  INFO 9200 --- [ClipCascade] [           main] eAuthenticationProviderManagerConfigurer : Global AuthenticationManager configured with AuthenticationProvider bean with name authenticationProvider
2025-10-19T09:49:40.254+08:00  WARN 9200 --- [ClipCascade] [           main] r$InitializeUserDetailsManagerConfigurer : Global AuthenticationManager configured with an AuthenticationProvider bean. UserDetailsService beans will not be used by Spring Security for automatically configuring username/password login. Consider removing the AuthenticationProvider bean. Alternatively, consider using the UserDetailsService in a manually instantiated DaoAuthenticationProvider. If the current configuration is intentional, to turn off this warning, increase the logging level of 'org.springframework.security.config.annotation.authentication.configuration.InitializeUserDetailsBeanManagerConfigurer' to ERROR
2025-10-19T09:49:41.268+08:00  INFO 9200 --- [ClipCascade] [           main] o.s.b.a.w.s.WelcomePageHandlerMapping    : Adding welcome page: class path resource [static/index.html]
2025-10-19T09:49:43.111+08:00  INFO 9200 --- [ClipCascade] [           main] o.s.v.b.OptionalValidatorFactoryBean     : Failed to set up a Bean Validation provider: jakarta.validation.NoProviderFoundException: Unable to create a Configuration, because no Jakarta Bean Validation provider could be found. Add a provider like Hibernate Validator (RI) to your classpath.
2025-10-19T09:49:44.240+08:00  INFO 9200 --- [ClipCascade] [           main] o.s.m.s.b.SimpleBrokerMessageHandler     : Starting...
2025-10-19T09:49:44.247+08:00  INFO 9200 --- [ClipCascade] [           main] o.s.m.s.b.SimpleBrokerMessageHandler     : BrokerAvailabilityEvent[available=true, SimpleBrokerMessageHandler [org.springframework.messaging.simp.broker.DefaultSubscriptionRegistry@2035f1f0]]
2025-10-19T09:49:44.252+08:00  INFO 9200 --- [ClipCascade] [           main] o.s.m.s.b.SimpleBrokerMessageHandler     : Started.
2025-10-19T09:49:44.474+08:00  INFO 9200 --- [ClipCascade] [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port 8080 (http) with context path '/'
2025-10-19T09:49:44.502+08:00  INFO 9200 --- [ClipCascade] [           main] o.s.s.config.TaskSchedulerRouter         : More than one TaskScheduler bean exists within the context, and none is named 'taskScheduler'. Mark one of them as primary or name it 'taskScheduler' (possibly as an alias); or implement the SchedulingConfigurer interface and call ScheduledTaskRegistrar#setScheduler explicitly within the configureTasks() callback: [messageBrokerTaskScheduler, heartbeatTaskScheduler]
2025-10-19T09:49:44.546+08:00  INFO 9200 --- [ClipCascade] [           main] c.a.clipcascade.ClipCascadeApplication   : Started ClipCascadeApplication in 31.26 seconds (process running for 32.663)
2025-10-19T09:49:48.011+08:00  INFO 9200 --- [ClipCascade] [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring DispatcherServlet 'dispatcherServlet'
2025-10-19T09:49:48.011+08:00  INFO 9200 --- [ClipCascade] [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Initializing Servlet 'dispatcherServlet'
2025-10-19T09:49:48.017+08:00  INFO 9200 --- [ClipCascade] [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Completed initialization in 3 ms
2025-10-19T09:50:44.245+08:00  INFO 9200 --- [ClipCascade] [MessageBroker-1] o.s.w.s.c.WebSocketMessageBrokerStats    : WebSocketSession[0 current WS(0)-HttpStream(0)-HttpPoll(0), 0 total, 0 closed abnormally (0 connect failure, 0 send limit, 0 transport error)], stompSubProtocol[processed CONNECT(0)-CONNECTED(0)-DISCONNECT(0)], stompBrokerRelay[null], inboundChannel[pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 0], outboundChannel[pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 0], sockJsScheduler[pool size = 1, active threads = 1, queued tasks = 0, completed tasks = 0]

3. Connect to the server using the Windows client.

Login successful but websocket connection failed. 
Please check websocket-url
Failed to connect websocket: Connection to ws://localhost:8080/clipsocket timed out

I then changed localhost to 127.0.0.1, and no error occurred.