When I use the @Push annotation on a view I get the following exception (JDK 16, Vaadin 19.0.7, Spring boot 2.4.7):
org.springframework.context.ApplicationContextException: Unable to start web server; nested exception is org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:162) ~[spring-boot-2.4.7-20210610.075414-42.jar:2.4.7-SNAPSHOT]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:577) ~[spring-context-5.3.8.jar:5.3.8]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:144) ~[spring-boot-2.4.7-20210610.075414-42.jar:2.4.7-SNAPSHOT]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:771) ~[spring-boot-2.4.7-20210610.075414-42.jar:2.4.7-SNAPSHOT]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:763) ~[spring-boot-2.4.7-20210610.075414-42.jar:2.4.7-SNAPSHOT]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:438) ~[spring-boot-2.4.7-20210610.075414-42.jar:2.4.7-SNAPSHOT]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:339) ~[spring-boot-2.4.7-20210610.075414-42.jar:2.4.7-SNAPSHOT]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1329) ~[spring-boot-2.4.7-20210610.075414-42.jar:2.4.7-SNAPSHOT]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1318) ~[spring-boot-2.4.7-20210610.075414-42.jar:2.4.7-SNAPSHOT]
at net.cbsolution.chameleon.ChameleonApplication.main(ChameleonApplication.java:10) ~[classes/:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:78) ~[na:na]
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:567) ~[na:na]
at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) ~[spring-boot-devtools-2.4.7-20210610.075414-42.jar:2.4.7-SNAPSHOT]
Caused by: org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat
at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.initialize(TomcatWebServer.java:142) ~[spring-boot-2.4.7-20210610.075414-42.jar:2.4.7-SNAPSHOT]
at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.<init>(TomcatWebServer.java:104) ~[spring-boot-2.4.7-20210610.075414-42.jar:2.4.7-SNAPSHOT]
at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getTomcatWebServer(TomcatServletWebServerFactory.java:450) ~[spring-boot-2.4.7-20210610.075414-42.jar:2.4.7-SNAPSHOT]
at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getWebServer(TomcatServletWebServerFactory.java:199) ~[spring-boot-2.4.7-20210610.075414-42.jar:2.4.7-SNAPSHOT]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.createWebServer(ServletWebServerApplicationContext.java:181) ~[spring-boot-2.4.7-20210610.075414-42.jar:2.4.7-SNAPSHOT]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:159) ~[spring-boot-2.4.7-20210610.075414-42.jar:2.4.7-SNAPSHOT]
... 14 common frames omitted
Caused by: java.lang.IllegalStateException: StandardEngine[Tomcat].StandardHost[localhost].TomcatEmbeddedContext[] failed to start
at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.rethrowDeferredStartupExceptions(TomcatWebServer.java:187) ~[spring-boot-2.4.7-20210610.075414-42.jar:2.4.7-SNAPSHOT]
at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.initialize(TomcatWebServer.java:126) ~[spring-boot-2.4.7-20210610.075414-42.jar:2.4.7-SNAPSHOT]
... 19 common frames omitted
What shall I do to use server push with Spring boot? Can anybody point a working example?
Here is the complete log:
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.4.7-SNAPSHOT)
2021-06-20 18:59:24.644 INFO 33309 --- [ restartedMain] n.c.chameleon.ChameleonApplication : Starting ChameleonApplication using Java 16 on franco-HP-ZBook-15-G5 with PID 33309 (/home/franco/projects/chameleon/target/classes started by franco in /home/franco/projects/chameleon)
2021-06-20 18:59:24.646 INFO 33309 --- [ restartedMain] n.c.chameleon.ChameleonApplication : No active profile set, falling back to default profiles: default
2021-06-20 18:59:24.672 INFO 33309 --- [ restartedMain] o.s.b.devtools.restart.ChangeableUrls : The Class-Path manifest attribute in /home/franco/.m2/repository/com/vaadin/license-checker/1.2.0/license-checker-1.2.0.jar referenced one or more files that do not exist: file:/home/franco/.m2/repository/com/vaadin/license-checker/1.2.0/gwt-elemental-2.8.2.vaadin2.jar,file:/home/franco/.m2/repository/com/vaadin/license-checker/1.2.0/oshi-core-5.5.0.jar,file:/home/franco/.m2/repository/com/vaadin/license-checker/1.2.0/jna-5.7.0.jar,file:/home/franco/.m2/repository/com/vaadin/license-checker/1.2.0/jna-platform-5.7.0.jar,file:/home/franco/.m2/repository/com/vaadin/license-checker/1.2.0/slf4j-api-1.7.30.jar
2021-06-20 18:59:24.672 INFO 33309 --- [ restartedMain] o.s.b.devtools.restart.ChangeableUrls : The Class-Path manifest attribute in /home/franco/.m2/repository/com/oracle/database/jdbc/ojdbc8/19.8.0.0/ojdbc8-19.8.0.0.jar referenced one or more files that do not exist: file:/home/franco/.m2/repository/com/oracle/database/jdbc/ojdbc8/19.8.0.0/oraclepki.jar
2021-06-20 18:59:24.672 INFO 33309 --- [ restartedMain] o.s.b.devtools.restart.ChangeableUrls : The Class-Path manifest attribute in /home/franco/.m2/repository/com/cronutils/cron-utils/9.1.5/cron-utils-9.1.5.jar referenced one or more files that do not exist: file:/home/franco/.m2/repository/com/cronutils/cron-utils/9.1.5/slf4j-api-1.7.30.jar,file:/home/franco/.m2/repository/com/cronutils/cron-utils/9.1.5/javax.el-3.0.0.jar
2021-06-20 18:59:24.672 INFO 33309 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : Devtools property defaults active! Set 'spring.devtools.add-properties' to 'false' to disable
2021-06-20 18:59:24.672 INFO 33309 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : For additional web related logging consider setting the 'logging.level.web' property to 'DEBUG'
2021-06-20 18:59:25.095 INFO 33309 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode.
2021-06-20 18:59:25.130 INFO 33309 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 32 ms. Found 6 JPA repository interfaces.
2021-06-20 18:59:25.471 INFO 33309 --- [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2021-06-20 18:59:25.475 INFO 33309 --- [ restartedMain] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2021-06-20 18:59:25.475 INFO 33309 --- [ restartedMain] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.46]
2021-06-20 18:59:25.525 INFO 33309 --- [ restartedMain] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2021-06-20 18:59:25.525 INFO 33309 --- [ restartedMain] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 853 ms
2021-06-20 18:59:25.574 INFO 33309 --- [ restartedMain] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...
2021-06-20 18:59:25.734 INFO 33309 --- [ restartedMain] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Start completed.
2021-06-20 18:59:25.737 INFO 33309 --- [ restartedMain] o.s.b.a.h2.H2ConsoleAutoConfiguration : H2 console available at '/h2-console'. Database available at 'jdbc:postgresql://localhost:5432/chameleon'
2021-06-20 18:59:25.841 INFO 33309 --- [ restartedMain] c.v.f.s.VaadinServletContextInitializer : Search for VaadinAppShell took 17 ms
2021-06-20 18:59:25.843 INFO 33309 --- [ restartedMain] c.v.f.s.s.VaadinAppShellInitializer : Using net.cbsolution.chameleon.MyAppShellConfigurator class for configuring `index.html` response
2021-06-20 18:59:25.848 ERROR 33309 --- [ restartedMain] o.a.c.c.C.[Tomcat].[localhost].[/] : Exception sending context initialized event to listener instance of class [com.vaadin.flow.spring.VaadinServletContextInitializer$CompositeServletContextListener]
java.lang.RuntimeException: Unable to initialize com.vaadin.flow.spring.VaadinServletContextInitializer$VaadinAppShellContextListener
at com.vaadin.flow.spring.VaadinServletContextInitializer$FailFastServletContextListener.contextInitialized(VaadinServletContextInitializer.java:192) ~[vaadin-spring-16.0.1.jar:na]
at com.vaadin.flow.spring.VaadinServletContextInitializer$CompositeServletContextListener.lambda$contextInitialized$0(VaadinServletContextInitializer.java:209) ~[vaadin-spring-16.0.1.jar:na]
at java.base/java.util.ArrayList.forEach(ArrayList.java:1511) ~[na:na]
at com.vaadin.flow.spring.VaadinServletContextInitializer$CompositeServletContextListener.contextInitialized(VaadinServletContextInitializer.java:209) ~[vaadin-spring-16.0.1.jar:na]
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4714) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5172) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1384) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1374) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) ~[na:na]
at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
at java.base/java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:145) ~[na:na]
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:909) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:829) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1384) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1374) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) ~[na:na]
at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
at java.base/java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:145) ~[na:na]
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:909) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:262) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
at org.apache.catalina.core.StandardService.startInternal(StandardService.java:433) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:930) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
at org.apache.catalina.startup.Tomcat.start(Tomcat.java:486) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.initialize(TomcatWebServer.java:123) ~[spring-boot-2.4.7-20210610.075414-42.jar:2.4.7-SNAPSHOT]
at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.<init>(TomcatWebServer.java:104) ~[spring-boot-2.4.7-20210610.075414-42.jar:2.4.7-SNAPSHOT]
at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getTomcatWebServer(TomcatServletWebServerFactory.java:450) ~[spring-boot-2.4.7-20210610.075414-42.jar:2.4.7-SNAPSHOT]
at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getWebServer(TomcatServletWebServerFactory.java:199) ~[spring-boot-2.4.7-20210610.075414-42.jar:2.4.7-SNAPSHOT]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.createWebServer(ServletWebServerApplicationContext.java:181) ~[spring-boot-2.4.7-20210610.075414-42.jar:2.4.7-SNAPSHOT]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:159) ~[spring-boot-2.4.7-20210610.075414-42.jar:2.4.7-SNAPSHOT]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:577) ~[spring-context-5.3.8.jar:5.3.8]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:144) ~[spring-boot-2.4.7-20210610.075414-42.jar:2.4.7-SNAPSHOT]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:771) ~[spring-boot-2.4.7-20210610.075414-42.jar:2.4.7-SNAPSHOT]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:763) ~[spring-boot-2.4.7-20210610.075414-42.jar:2.4.7-SNAPSHOT]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:438) ~[spring-boot-2.4.7-20210610.075414-42.jar:2.4.7-SNAPSHOT]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:339) ~[spring-boot-2.4.7-20210610.075414-42.jar:2.4.7-SNAPSHOT]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1329) ~[spring-boot-2.4.7-20210610.075414-42.jar:2.4.7-SNAPSHOT]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1318) ~[spring-boot-2.4.7-20210610.075414-42.jar:2.4.7-SNAPSHOT]
at net.cbsolution.chameleon.ChameleonApplication.main(ChameleonApplication.java:10) ~[classes/:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:78) ~[na:na]
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:567) ~[na:na]
at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) ~[spring-boot-devtools-2.4.7-20210610.075414-42.jar:2.4.7-SNAPSHOT]
Caused by: com.vaadin.flow.server.InvalidApplicationConfigurationException:
Found app shell configuration annotations in non `AppShellConfigurator` classes.
Please create a custom class implementing `AppShellConfigurator` and move the following annotations to it:
- @Push from net.cbsolution.chameleon.ui.views.AlertView
at com.vaadin.flow.server.startup.VaadinAppShellInitializer.init(VaadinAppShellInitializer.java:157) ~[flow-server-6.0.8.jar:6.0.8]
at com.vaadin.flow.server.startup.VaadinAppShellInitializer.init(VaadinAppShellInitializer.java:94) ~[flow-server-6.0.8.jar:6.0.8]
at com.vaadin.flow.spring.VaadinServletContextInitializer$VaadinAppShellContextListener.failFastContextInitialized(VaadinServletContextInitializer.java:550) ~[vaadin-spring-16.0.1.jar:na]
at com.vaadin.flow.spring.VaadinServletContextInitializer$FailFastServletContextListener.contextInitialized(VaadinServletContextInitializer.java:188) ~[vaadin-spring-16.0.1.jar:na]
... 47 common frames omitted
2021-06-20 18:59:25.848 ERROR 33309 --- [ restartedMain] o.apache.catalina.core.StandardContext : One or more listeners failed to start. Full details will be found in the appropriate container log file
2021-06-20 18:59:25.849 ERROR 33309 --- [ restartedMain] o.apache.catalina.core.StandardContext : Context [] startup failed due to previous errors
2021-06-20 18:59:25.852 WARN 33309 --- [ restartedMain] o.a.c.loader.WebappClassLoaderBase : The web application [ROOT] appears to have started a thread named [HikariPool-1 housekeeper] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:
java.base@16/jdk.internal.misc.Unsafe.park(Native Method)
java.base@16/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:252)
java.base@16/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:1661)
java.base@16/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1182)
java.base@16/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:899)
java.base@16/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
java.base@16/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
java.base@16/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
java.base@16/java.lang.Thread.run(Thread.java:831)
2021-06-20 18:59:25.853 WARN 33309 --- [ restartedMain] o.a.c.loader.WebappClassLoaderBase : The web application [ROOT] appears to have started a thread named [HikariPool-1 connection adder] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:
java.base@16/java.lang.String.equals(String.java:1027)
java.base@16/sun.security.ssl.CipherSuite.nameOf(CipherSuite.java:898)
java.base@16/sun.security.ssl.SSLAlgorithmDecomposer.decompose(SSLAlgorithmDecomposer.java:262)
java.base@16/sun.security.util.AbstractAlgorithmConstraints.checkAlgorithm(AbstractAlgorithmConstraints.java:99)
java.base@16/sun.security.util.DisabledAlgorithmConstraints.permits(DisabledAlgorithmConstraints.java:140)
java.base@16/sun.security.ssl.SSLAlgorithmConstraints.permits(SSLAlgorithmConstraints.java:164)
java.base@16/sun.security.ssl.SSLAlgorithmConstraints.permits(SSLAlgorithmConstraints.java:154)
java.base@16/sun.security.ssl.HandshakeContext.isActivatable(HandshakeContext.java:550)
java.base@16/sun.security.ssl.HandshakeContext.getActiveCipherSuites(HandshakeContext.java:339)
java.base@16/sun.security.ssl.HandshakeContext.<init>(HandshakeContext.java:185)
java.base@16/sun.security.ssl.ClientHandshakeContext.<init>(ClientHandshakeContext.java:98)
java.base@16/sun.security.ssl.TransportContext.kickstart(TransportContext.java:238)
java.base@16/sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:434)
java.base@16/sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:412)
app//org.postgresql.ssl.MakeSSL.convert(MakeSSL.java:41)
app//org.postgresql.core.v3.ConnectionFactoryImpl.enableSSL(ConnectionFactoryImpl.java:534)
app//org.postgresql.core.v3.ConnectionFactoryImpl.tryConnect(ConnectionFactoryImpl.java:149)
app//org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:213)
app//org.postgresql.core.ConnectionFactory.openConnection(ConnectionFactory.java:51)
app//org.postgresql.jdbc.PgConnection.<init>(PgConnection.java:223)
app//org.postgresql.Driver.makeConnection(Driver.java:465)
app//org.postgresql.Driver.connect(Driver.java:264)
app//com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:138)
app//com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:358)
app//com.zaxxer.hikari.pool.PoolBase.newPoolEntry(PoolBase.java:206)
app//com.zaxxer.hikari.pool.HikariPool.createPoolEntry(HikariPool.java:477)
app//com.zaxxer.hikari.pool.HikariPool.access$100(HikariPool.java:71)
app//com.zaxxer.hikari.pool.HikariPool$PoolEntryCreator.call(HikariPool.java:725)
app//com.zaxxer.hikari.pool.HikariPool$PoolEntryCreator.call(HikariPool.java:711)
java.base@16/java.util.concurrent.FutureTask.run(FutureTask.java:264)
java.base@16/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130)
java.base@16/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
java.base@16/java.lang.Thread.run(Thread.java:831)
2021-06-20 18:59:25.870 INFO 33309 --- [ restartedMain] o.apache.catalina.core.StandardService : Stopping service [Tomcat]
2021-06-20 18:59:25.872 WARN 33309 --- [ restartedMain] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.context.ApplicationContextException: Unable to start web server; nested exception is org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat
2021-06-20 18:59:25.873 INFO 33309 --- [ restartedMain] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Shutdown initiated...
2021-06-20 18:59:25.878 INFO 33309 --- [ restartedMain] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Shutdown completed.
2021-06-20 18:59:25.885 INFO 33309 --- [ restartedMain] ConditionEvaluationReportLoggingListener :
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2021-06-20 18:59:25.895 ERROR 33309 --- [ restartedMain] o.s.boot.SpringApplication : Application run failed
org.springframework.context.ApplicationContextException: Unable to start web server; nested exception is org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:162) ~[spring-boot-2.4.7-20210610.075414-42.jar:2.4.7-SNAPSHOT]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:577) ~[spring-context-5.3.8.jar:5.3.8]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:144) ~[spring-boot-2.4.7-20210610.075414-42.jar:2.4.7-SNAPSHOT]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:771) ~[spring-boot-2.4.7-20210610.075414-42.jar:2.4.7-SNAPSHOT]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:763) ~[spring-boot-2.4.7-20210610.075414-42.jar:2.4.7-SNAPSHOT]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:438) ~[spring-boot-2.4.7-20210610.075414-42.jar:2.4.7-SNAPSHOT]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:339) ~[spring-boot-2.4.7-20210610.075414-42.jar:2.4.7-SNAPSHOT]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1329) ~[spring-boot-2.4.7-20210610.075414-42.jar:2.4.7-SNAPSHOT]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1318) ~[spring-boot-2.4.7-20210610.075414-42.jar:2.4.7-SNAPSHOT]
at net.cbsolution.chameleon.ChameleonApplication.main(ChameleonApplication.java:10) ~[classes/:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:78) ~[na:na]
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:567) ~[na:na]
at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) ~[spring-boot-devtools-2.4.7-20210610.075414-42.jar:2.4.7-SNAPSHOT]
Caused by: org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat
at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.initialize(TomcatWebServer.java:142) ~[spring-boot-2.4.7-20210610.075414-42.jar:2.4.7-SNAPSHOT]
at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.<init>(TomcatWebServer.java:104) ~[spring-boot-2.4.7-20210610.075414-42.jar:2.4.7-SNAPSHOT]
at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getTomcatWebServer(TomcatServletWebServerFactory.java:450) ~[spring-boot-2.4.7-20210610.075414-42.jar:2.4.7-SNAPSHOT]
at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getWebServer(TomcatServletWebServerFactory.java:199) ~[spring-boot-2.4.7-20210610.075414-42.jar:2.4.7-SNAPSHOT]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.createWebServer(ServletWebServerApplicationContext.java:181) ~[spring-boot-2.4.7-20210610.075414-42.jar:2.4.7-SNAPSHOT]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:159) ~[spring-boot-2.4.7-20210610.075414-42.jar:2.4.7-SNAPSHOT]
... 14 common frames omitted
Caused by: java.lang.IllegalStateException: StandardEngine[Tomcat].StandardHost[localhost].TomcatEmbeddedContext[] failed to start
at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.rethrowDeferredStartupExceptions(TomcatWebServer.java:187) ~[spring-boot-2.4.7-20210610.075414-42.jar:2.4.7-SNAPSHOT]
at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.initialize(TomcatWebServer.java:126) ~[spring-boot-2.4.7-20210610.075414-42.jar:2.4.7-SNAPSHOT]
... 19 common frames omitted
Process finished with exit code 0
And here is MyAppShellConfigurator:
package net.cbsolution.chameleon;
import com.vaadin.flow.component.page.AppShellConfigurator;
import com.vaadin.flow.component.page.Push;
@Push
public class MyAppShellConfigurator implements AppShellConfigurator {
}
