I could not start my vaadin app anymore, Earlier it builds frontend but after restarting the system it is throwing errors.
The literal "" is something i tried to check in notepad but its some characters which looks like whitespaces.
16:43:32.317 [Thread-0] DEBUG org.springframework.boot.devtools.restart.classloader.RestartClassLoader - Created RestartClassLoader
org.springframework.boot.devtools.restart.classloader.RestartClassLoader@59689d8d
_____ _ ____ ____ __ __ _____ _ _ _
| ___|| | ___ __ __ / ___|| _ \ | \/ | |_ _| _ _ | |_ ___ _ __ (_) __ _ | |
| |_ | | / _ \ \ \ /\ / / | | | |_) || |\/| | | | | | | || __| / _ \ | '__|| | / _` || |
| _| | || (_) | \ V V / | |___ | _ < | | | | | | | |_| || |_ | (_) || | | || (_| || |
|_| |_| \___/ \_/\_/ \____||_| \_\|_| |_| |_| \__,_| \__| \___/ |_| |_| \__,_||_|
2023-01-19 16:43:33.075 INFO 20624 --- [ restartedMain] com.example.application.Application : Starting Application using Java 11.0.17 on **** with PID 20624 (C:\Users\Downloads\flow-crm-tutorial\flow-crm-tutorial\target\classes started by *** in C:\Users\Downloads\flow-crm-tutorial)
2023-01-19 16:43:33.075 INFO 20624 --- [ restartedMain] com.example.application.Application : No active profile set, falling back to 1 default profile: "default"
2023-01-19 16:43:33.176 INFO 20624 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : Devtools property defaults active! Set 'spring.devtools.add-properties' to 'false' to disable
2023-01-19 16:43:33.176 INFO 20624 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : For additional web related logging consider setting the 'logging.level.web' property to 'DEBUG'
2023-01-19 16:43:34.492 INFO 20624 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode.
2023-01-19 16:43:34.550 INFO 20624 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 34 ms. Found 0 JPA repository interfaces.
2023-01-19 16:43:35.947 INFO 20624 --- [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8081 (http)
2023-01-19 16:43:35.967 INFO 20624 --- [ restartedMain] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2023-01-19 16:43:35.967 INFO 20624 --- [ restartedMain] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.69]
2023-01-19 16:43:36.266 INFO 20624 --- [ restartedMain] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2023-01-19 16:43:36.266 INFO 20624 --- [ restartedMain] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 3090 ms
2023-01-19 16:43:36.336 INFO 20624 --- [ restartedMain] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...
2023-01-19 16:43:36.689 INFO 20624 --- [ restartedMain] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Start completed.
2023-01-19 16:43:36.710 INFO 20624 --- [ restartedMain] o.s.b.a.h2.H2ConsoleAutoConfiguration : H2 console available at '/h2-console'. Database available at 'jdbc:h2:mem:d51f8e85-cbba-4edf-a049-6468c2ed4af8'
2023-01-19 16:43:36.949 INFO 20624 --- [ restartedMain] c.v.f.s.VaadinServletContextInitializer : Search for VaadinAppShell took 35 ms
2023-01-19 16:43:38.704 INFO 20624 --- [ restartedMain] c.v.f.s.VaadinServletContextInitializer : Search for subclasses and classes with annotations took 1610 ms
2023-01-19 16:43:38.835 INFO 20624 --- [ restartedMain] c.v.b.d.startup.DevModeStartupListener : Starting dev-mode updaters in C:\Users\Downloads\flow-crm-tutorial folder.
2023-01-19 16:43:38.914 INFO 20624 --- [ restartedMain] c.v.f.s.f.s.FullDependenciesScanner : Visited 121 classes. Took 49 ms.
Vaadin application has been deployed and started to the context path "/".
2023-01-19 16:43:39.127 INFO 20624 --- [ restartedMain] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [name: default]
2023-01-19 16:43:39.226 INFO 20624 --- [ restartedMain] org.hibernate.Version : HHH000412: Hibernate ORM core version 5.6.14.Final
2023-01-19 16:43:39.530 INFO 20624 --- [ restartedMain] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {5.1.2.Final}
2023-01-19 16:43:39.762 INFO 20624 --- [ restartedMain] org.hibernate.dialect.Dialect : HHH000400: Using dialect: org.hibernate.dialect.H2Dialect
2023-01-19 16:43:40.146 INFO 20624 --- [ restartedMain] o.h.e.t.j.p.i.JtaPlatformInitiator : HHH000490: Using JtaPlatform implementation: [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform]
2023-01-19 16:43:40.154 INFO 20624 --- [ restartedMain] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2023-01-19 16:43:40.278 INFO 20624 --- [ restartedMain] f.a.AutowiredAnnotationBeanPostProcessor : Autowired annotation is not supported on static fields: private static org.springframework.kafka.config.KafkaListenerEndpointRegistry com.example.application.KafkaServices.KafkaSpringConsumerService.registry
2023-01-19 16:43:40.435 WARN 20624 --- [ restartedMain] 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
2023-01-19 16:43:41.120 INFO 20624 --- [ restartedMain] o.s.b.d.a.OptionalLiveReloadServer : LiveReload server is running on port 35729
2023-01-19 16:43:41.351 INFO 20624 --- [ restartedMain] c.v.f.s.DefaultDeploymentConfiguration :
Vaadin is running in DEVELOPMENT mode - do not use for production deployments.
2023-01-19 16:43:41.452 INFO 20624 --- [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8081 (http) with context path ''
2023-01-19 16:43:41.473 INFO 20624 --- [ restartedMain] com.example.application.Application : Started Application in 9.134 seconds (JVM running for 10.636)
2023-01-19 16:43:43.026 INFO 20624 --- [nio-8081-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring DispatcherServlet 'dispatcherServlet'
2023-01-19 16:43:43.027 INFO 20624 --- [nio-8081-exec-1] o.s.web.servlet.DispatcherServlet : Initializing Servlet 'dispatcherServlet'
2023-01-19 16:43:43.030 INFO 20624 --- [nio-8081-exec-1] o.s.web.servlet.DispatcherServlet : Completed initialization in 3 ms
2023-01-19 16:43:43.442 WARN 20624 --- [nio-8081-exec-1] o.a.c.util.SessionIdGeneratorBase : Creation of SecureRandom instance for session ID generation using [SHA1PRNG] took [311] milliseconds.
2023-01-19 16:43:43.454 INFO 20624 --- [nio-8081-exec-1] c.vaadin.flow.spring.SpringInstantiator : The number of beans implementing 'I18NProvider' is 0. Cannot use Spring beans for I18N, falling back to the default behavior
2023-01-19 16:43:43.466 ERROR 20624 --- [nio-8081-exec-1] c.v.flow.server.DefaultErrorHandler :
elemental.json.JsonException: Invalid literal: " "
at elemental.json.impl.JsonTokenizer.getValueForLiteral(JsonTokenizer.java:312) ~[gwt-elemental-2.8.2.vaadin2.jar:2.8.2.vaadin2]
at elemental.json.impl.JsonTokenizer.nextValue(JsonTokenizer.java:177) ~[gwt-elemental-2.8.2.vaadin2.jar:2.8.2.vaadin2]
at elemental.json.impl.JreJsonFactory.parse(JreJsonFactory.java:64) ~[gwt-elemental-2.8.2.vaadin2.jar:2.8.2.vaadin2]
at elemental.json.Json.parse(Json.java:53) ~[gwt-elemental-2.8.2.vaadin2.jar:2.8.2.vaadin2]
at com.vaadin.flow.server.frontend.TaskInstallWebpackPlugins.generatePluginFiles(TaskInstallWebpackPlugins.java:94) ~[flow-server-23.3.1.jar:23.3.1]
at com.vaadin.flow.server.frontend.TaskInstallWebpackPlugins.lambda$execute$0(TaskInstallWebpackPlugins.java:64) ~[flow-server-23.3.1.jar:23.3.1]
at java.base/java.util.ArrayList.forEach(ArrayList.java:1541) ~[na:na]
at com.vaadin.flow.server.frontend.TaskInstallWebpackPlugins.execute(TaskInstallWebpackPlugins.java:62) ~[flow-server-23.3.1.jar:23.3.1]
at com.vaadin.flow.server.frontend.NodeTasks.execute(NodeTasks.java:342) ~[flow-server-23.3.1.jar:23.3.1]
at com.vaadin.base.devserver.startup.DevModeInitializer.runNodeTasks(DevModeInitializer.java:435) ~[vaadin-dev-server-23.3.1.jar:na]
at com.vaadin.base.devserver.startup.DevModeInitializer.lambda$initDevModeHandler$0(DevModeInitializer.java:348) ~[vaadin-dev-server-23.3.1.jar:na]
at java.base/java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1736) ~[na:na]
at java.base/java.util.concurrent.CompletableFuture$AsyncRun.exec(CompletableFuture.java:1728) ~[na:na]
at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290) ~[na:na]
at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1020) ~[na:na]
at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1656) ~[na:na]
at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1594) ~[na:na]
at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:183) ~[na:na]
2023-01-19 16:43:43.468 ERROR 20624 --- [nio-8081-exec-1] o.a.c.c.C.[.[.[/].[springServlet] : Servlet.service() for servlet [springServlet] threw exception
elemental.json.JsonException: Invalid literal: " "
at elemental.json.impl.JsonTokenizer.getValueForLiteral(JsonTokenizer.java:312) ~[gwt-elemental-2.8.2.vaadin2.jar:2.8.2.vaadin2]
at elemental.json.impl.JsonTokenizer.nextValue(JsonTokenizer.java:177) ~[gwt-elemental-2.8.2.vaadin2.jar:2.8.2.vaadin2]
at elemental.json.impl.JreJsonFactory.parse(JreJsonFactory.java:64) ~[gwt-elemental-2.8.2.vaadin2.jar:2.8.2.vaadin2]
at elemental.json.Json.parse(Json.java:53) ~[gwt-elemental-2.8.2.vaadin2.jar:2.8.2.vaadin2]
at com.vaadin.flow.server.frontend.TaskInstallWebpackPlugins.generatePluginFiles(TaskInstallWebpackPlugins.java:94) ~[flow-server-23.3.1.jar:23.3.1]
at com.vaadin.flow.server.frontend.TaskInstallWebpackPlugins.lambda$execute$0(TaskInstallWebpackPlugins.java:64) ~[flow-server-23.3.1.jar:23.3.1]
at java.base/java.util.ArrayList.forEach(ArrayList.java:1541) ~[na:na]
at com.vaadin.flow.server.frontend.TaskInstallWebpackPlugins.execute(TaskInstallWebpackPlugins.java:62) ~[flow-server-23.3.1.jar:23.3.1]
at com.vaadin.flow.server.frontend.NodeTasks.execute(NodeTasks.java:342) ~[flow-server-23.3.1.jar:23.3.1]
at com.vaadin.base.devserver.startup.DevModeInitializer.runNodeTasks(DevModeInitializer.java:435) ~[vaadin-dev-server-23.3.1.jar:na]
at com.vaadin.base.devserver.startup.DevModeInitializer.lambda$initDevModeHandler$0(DevModeInitializer.java:348) ~[vaadin-dev-server-23.3.1.jar:na]
at java.base/java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1736) ~[na:na]
at java.base/java.util.concurrent.CompletableFuture$AsyncRun.exec(CompletableFuture.java:1728) ~[na:na]
at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290) ~[na:na]
at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1020) ~[na:na]
at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1656) ~[na:na]
at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1594) ~[na:na]
at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:183) ~[na:na]
2023-01-19 16:43:43.472 ERROR 20624 --- [nio-8081-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [com.vaadin.flow.server.ServiceException: elemental.json.JsonException: Invalid literal: " "] with root cause
elemental.json.JsonException: Invalid literal: " "
at elemental.json.impl.JsonTokenizer.getValueForLiteral(JsonTokenizer.java:312) ~[gwt-elemental-2.8.2.vaadin2.jar:2.8.2.vaadin2]
at elemental.json.impl.JsonTokenizer.nextValue(JsonTokenizer.java:177) ~[gwt-elemental-2.8.2.vaadin2.jar:2.8.2.vaadin2]
at elemental.json.impl.JreJsonFactory.parse(JreJsonFactory.java:64) ~[gwt-elemental-2.8.2.vaadin2.jar:2.8.2.vaadin2]
at elemental.json.Json.parse(Json.java:53) ~[gwt-elemental-2.8.2.vaadin2.jar:2.8.2.vaadin2]
at com.vaadin.flow.server.frontend.TaskInstallWebpackPlugins.generatePluginFiles(TaskInstallWebpackPlugins.java:94) ~[flow-server-23.3.1.jar:23.3.1]
at com.vaadin.flow.server.frontend.TaskInstallWebpackPlugins.lambda$execute$0(TaskInstallWebpackPlugins.java:64) ~[flow-server-23.3.1.jar:23.3.1]
at java.base/java.util.ArrayList.forEach(ArrayList.java:1541) ~[na:na]
at com.vaadin.flow.server.frontend.TaskInstallWebpackPlugins.execute(TaskInstallWebpackPlugins.java:62) ~[flow-server-23.3.1.jar:23.3.1]
at com.vaadin.flow.server.frontend.NodeTasks.execute(NodeTasks.java:342) ~[flow-server-23.3.1.jar:23.3.1]
at com.vaadin.base.devserver.startup.DevModeInitializer.runNodeTasks(DevModeInitializer.java:435) ~[vaadin-dev-server-23.3.1.jar:na]
at com.vaadin.base.devserver.startup.DevModeInitializer.lambda$initDevModeHandler$0(DevModeInitializer.java:348) ~[vaadin-dev-server-23.3.1.jar:na]
at java.base/java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1736) ~[na:na]
at java.base/java.util.concurrent.CompletableFuture$AsyncRun.exec(CompletableFuture.java:1728) ~[na:na]
at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290) ~[na:na]
at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1020) ~[na:na]
at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1656) ~[na:na]
at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1594) ~[na:na]
at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:183) ~[na:na]
2023-01-19 16:43:43.931 ERROR 20624 --- [nio-8081-exec-2] c.v.flow.server.DefaultErrorHandler :
elemental.json.JsonException: Invalid literal: " "
at elemental.json.impl.JsonTokenizer.getValueForLiteral(JsonTokenizer.java:312) ~[gwt-elemental-2.8.2.vaadin2.jar:2.8.2.vaadin2]
at elemental.json.impl.JsonTokenizer.nextValue(JsonTokenizer.java:177) ~[gwt-elemental-2.8.2.vaadin2.jar:2.8.2.vaadin2]
at elemental.json.impl.JreJsonFactory.parse(JreJsonFactory.java:64) ~[gwt-elemental-2.8.2.vaadin2.jar:2.8.2.vaadin2]
at elemental.json.Json.parse(Json.java:53) ~[gwt-elemental-2.8.2.vaadin2.jar:2.8.2.vaadin2]
at com.vaadin.flow.server.frontend.TaskInstallWebpackPlugins.generatePluginFiles(TaskInstallWebpackPlugins.java:94) ~[flow-server-23.3.1.jar:23.3.1]
at com.vaadin.flow.server.frontend.TaskInstallWebpackPlugins.lambda$execute$0(TaskInstallWebpackPlugins.java:64) ~[flow-server-23.3.1.jar:23.3.1]
at java.base/java.util.ArrayList.forEach(ArrayList.java:1541) ~[na:na]
at com.vaadin.flow.server.frontend.TaskInstallWebpackPlugins.execute(TaskInstallWebpackPlugins.java:62) ~[flow-server-23.3.1.jar:23.3.1]
at com.vaadin.flow.server.frontend.NodeTasks.execute(NodeTasks.java:342) ~[flow-server-23.3.1.jar:23.3.1]
at com.vaadin.base.devserver.startup.DevModeInitializer.runNodeTasks(DevModeInitializer.java:435) ~[vaadin-dev-server-23.3.1.jar:na]
at com.vaadin.base.devserver.startup.DevModeInitializer.lambda$initDevModeHandler$0(DevModeInitializer.java:348) ~[vaadin-dev-server-23.3.1.jar:na]
at java.base/java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1736) ~[na:na]
at java.base/java.util.concurrent.CompletableFuture$AsyncRun.exec(CompletableFuture.java:1728) ~[na:na]
at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290) ~[na:na]
at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1020) ~[na:na]
at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1656) ~[na:na]
at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1594) ~[na:na]
at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:183) ~[na:na]
The program was running fine and all of a sudden I am getting errors when running the program.
Vaadin version is 23.3.1
CodePudding user response：
If no changes were made to the code, can you try a clean build ?
mvn vaadin:clean-frontend
mvn clean spring-boot:run