Not able to start spring boot application using jshell

Question

I am trying to start a spring boot jar executable for my project from jshell but it throws an exception and does not start.

Commands that I am running:

./jshell --class-path myapp-0.0.1-SNAPSHOT.jar

Once jshell starts I invoke:

org.springframework.boot.loader.JarLauncher.main(new String[0])

This throws the following exception which is very short and not much useful I guess:

java.lang.reflect.InvocationTargetException thrown
        at NativeMethodAccessorImpl.invoke0 (Native Method)
        at NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
        at DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
        at Method.invoke (Method.java:564)
        at MainMethodRunner.run (MainMethodRunner.java:48)
        at Launcher.launch (Launcher.java:87)
        at Launcher.launch (Launcher.java:50)
        at JarLauncher.main (JarLauncher.java:51)
        at (#1:1)

After this, I tried to start the main class again and I got the following exception:

java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Tomcat].StandardHost[localhost].TomcatEmbeddedContext[]]
    at java.base/java.util.concurrent.FutureTask.report(FutureTask.java:122)
    at java.base/java.util.concurrent.FutureTask.get(FutureTask.java:191)
    at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:939)
    at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:872)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1419)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1409)
    at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1135)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
    at java.base/java.lang.Thread.run(Thread.java:844)
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Tomcat].StandardHost[localhost].TomcatEmbeddedContext[]]
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:167)
    ... 6 common frames omitted
Caused by: org.apache.catalina.LifecycleException: Failed to initialize component [org.apache.catalina.webresources.StandardRoot@2e571f76]
    at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:112)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:140)
    at org.apache.catalina.core.StandardContext.resourcesStart(StandardContext.java:4860)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:4992)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    ... 6 common frames omitted
Caused by: java.lang.Error: factory already defined
    at java.base/java.net.URL.setURLStreamHandlerFactory(URL.java:1184)
    at org.apache.catalina.webresources.TomcatURLStreamHandlerFactory.<init>(TomcatURLStreamHandlerFactory.java:130)
    at org.apache.catalina.webresources.TomcatURLStreamHandlerFactory.getInstanceInternal(TomcatURLStreamHandlerFactory.java:53)
    at org.apache.catalina.webresources.TomcatURLStreamHandlerFactory.register(TomcatURLStreamHandlerFactory.java:77)
    at org.apache.catalina.webresources.StandardRoot.registerURLStreamHandlerFactory(StandardRoot.java:684)
    at org.apache.catalina.webresources.StandardRoot.initInternal(StandardRoot.java:667)
    at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:107)
    ... 10 common frames omitted

2018-07-06 16:01:09.422 ERROR 87398 --- [           main] org.apache.catalina.core.ContainerBase   : A child container failed during start

java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Tomcat].StandardHost[localhost]]
    at java.base/java.util.concurrent.FutureTask.report(FutureTask.java:122)
    at java.base/java.util.concurrent.FutureTask.get(FutureTask.java:191)
    at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:939)
    at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:262)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.StandardService.startInternal(StandardService.java:422)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:793)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.startup.Tomcat.start(Tomcat.java:367)
    at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer.initialize(TomcatEmbeddedServletContainer.java:99)
    at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer.<init>(TomcatEmbeddedServletContainer.java:84)
    at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory.getTomcatEmbeddedServletContainer(TomcatEmbeddedServletContainerFactory.java:554)
    at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory.getEmbeddedServletContainer(TomcatEmbeddedServletContainerFactory.java:179)
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.createEmbeddedServletContainer(EmbeddedWebApplicationContext.java:164)
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.onRefresh(EmbeddedWebApplicationContext.java:134)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:537)
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122)
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:693)
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:360)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:303)
    at org.openchs.OpenCHS.main(OpenCHS.java:33)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:564)
    at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:48)
    at org.springframework.boot.loader.Launcher.launch(Launcher.java:87)
    at org.springframework.boot.loader.Launcher.launch(Launcher.java:50)
    at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:51)
    at REPL.$JShell$12.do_it$($JShell$12.java:4)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:564)
    at jdk.jshell/jdk.jshell.execution.DirectExecutionControl.invoke(DirectExecutionControl.java:209)
    at jdk.jshell/jdk.jshell.execution.RemoteExecutionControl.invoke(RemoteExecutionControl.java:116)
    at jdk.jshell/jdk.jshell.execution.DirectExecutionControl.invoke(DirectExecutionControl.java:119)
    at jdk.jshell/jdk.jshell.execution.ExecutionControlForwarder.processCommand(ExecutionControlForwarder.java:144)
    at jdk.jshell/jdk.jshell.execution.ExecutionControlForwarder.commandLoop(ExecutionControlForwarder.java:237)
    at jdk.jshell/jdk.jshell.execution.Util.forwardExecutionControl(Util.java:76)
    at jdk.jshell/jdk.jshell.execution.Util.forwardExecutionControlAndIO(Util.java:137)
    at jdk.jshell/jdk.jshell.execution.RemoteExecutionControl.main(RemoteExecutionControl.java:70)
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Tomcat].StandardHost[localhost]]
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:167)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1419)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1409)
    at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1135)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
    at java.base/java.lang.Thread.run(Thread.java:844)
Caused by: org.apache.catalina.LifecycleException: A child container failed during start
    at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:947)
    at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:872)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    ... 6 common frames omitted

|  java.lang.reflect.InvocationTargetException thrown
|        at NativeMethodAccessorImpl.invoke0 (Native Method)
|        at NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
|        at DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
|        at Method.invoke (Method.java:564)
|        at MainMethodRunner.run (MainMethodRunner.java:48)
|        at Launcher.launch (Launcher.java:87)
|        at Launcher.launch (Launcher.java:50)
|        at JarLauncher.main (JarLauncher.java:51)
|        at (#2:1)

I am using Gradle as a dependency management tool.

I am starting the app with jshell so I can change things while the app is running. — hithacker, Jul 07 '18 at 13:42

score 3 · Answer 1 · answered Jul 06 '18 at 11:11

3

Don't start your Spring Boot application using JShell - just use java.

java -jar myapp-0.0.1-SNAPSHOT.jar

JShell is for running simple evaluations, not web servers:

JShell is a Read-Evaluate-Print Loop (REPL), which evaluates declarations, statements, and expressions as they are entered and immediately shows the results. The tool is run from the command line.

answered Jul 06 '18 at 11:11

Ben Harris

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2

Well, people in other languages do use REPLs for everything. I know that I can just use java but as I said in the answer to comment on the question: I want to change things while the app is running – hithacker Jul 07 '18 at 13:41
1

It's true you're not going to want to mess with executing a spring boot app from anywhere but the command line, but you could use remote debugging to achieve a lot of what you're looking to do with jshell. If you're willing to put a bit more work in to specifying how you interact with the app by creating custom commands, you might want to consider opening a spring shell once the app starts: https://projects.spring.io/spring-shell/ I'm currently playing around with this, but the app I'm developing intends to expose a CLI, not just use one for debugging purposes. – JBKM Jul 08 '18 at 20:52
Totally appreciate this @JBKM :) – hithacker Jul 09 '18 at 10:35

Not able to start spring boot application using jshell

1 Answers1