On the heels of a previous question I asked about integrating Spring Boot and React together, I used that solution to resolve Spring Boot finding React build files, as well as displaying information from API requests.
Another unexpected issue has formed up - Apache Tomcat fails to deploy the war file that resulted from these changes. The project, however, is flawless when it works inside the IDE.
Upon trying to start the project, the following occurs:
Before anything else, this is the stack trace:
09-Mar-2023 15:53:27.129 INFO [http-nio-8080-exec-18] org.apache.catalina.startup.HostConfig.undeploy Undeploying context [/backend]
09-Mar-2023 15:53:37.395 INFO [http-nio-8080-exec-21] org.apache.catalina.startup.HostConfig.deployWAR Deploying web application archive [C:\Program Files\Apache Software Foundation\Tomcat 9.0\webapps\backend.war]
09-Mar-2023 15:53:42.775 INFO [http-nio-8080-exec-21] org.apache.jasper.servlet.TldScanner.scanJars At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
09-Mar-2023 15:53:55.329 SEVERE [http-nio-8080-exec-21] org.apache.catalina.startup.HostConfig.deployWAR Error deploying web application archive [C:\Program Files\Apache Software Foundation\Tomcat 9.0\webapps\backend.war]
java.lang.IllegalStateException: Error starting child
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:729)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:698)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:696)
at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:1023)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:543)
at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1689)
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:566)
at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:293)
at java.management/com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:809)
at java.management/com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)
at org.apache.catalina.manager.ManagerServlet.check(ManagerServlet.java:1614)
at org.apache.catalina.manager.HTMLManagerServlet.upload(HTMLManagerServlet.java:291)
at org.apache.catalina.manager.HTMLManagerServlet.doPost(HTMLManagerServlet.java:209)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:696)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:779)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at org.apache.catalina.filters.CsrfPreventionFilter.doFilter(CsrfPreventionFilter.java:203)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at org.apache.catalina.filters.HttpHeaderSecurityFilter.doFilter(HttpHeaderSecurityFilter.java:126)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:177)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:660)
at org.apache.catalina.valves.RequestFilterValve.process(RequestFilterValve.java:378)
at org.apache.catalina.valves.RemoteAddrValve.invoke(RemoteAddrValve.java:56)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:687)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:360)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:399)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:891)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1784)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.base/java.lang.Thread.run(Thread.java:829)
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/backend]]
at org.apache.catalina.util.LifecycleBase.handleSubClassException(LifecycleBase.java:440)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:198)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:726)
... 47 more
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'application': Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [javafx.application.Application]: Is it an abstract class?; nested exception is java.lang.InstantiationException
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1334)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1232)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:582)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:955)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:918)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583)
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:147)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:731)
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:408)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:307)
at org.springframework.boot.web.servlet.support.SpringBootServletInitializer.run(SpringBootServletInitializer.java:175)
at org.springframework.boot.web.servlet.support.SpringBootServletInitializer.createRootApplicationContext(SpringBootServletInitializer.java:155)
at org.springframework.boot.web.servlet.support.SpringBootServletInitializer.onStartup(SpringBootServletInitializer.java:97)
at org.springframework.web.SpringServletContainerInitializer.onStartup(SpringServletContainerInitializer.java:174)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5211)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
... 48 more
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [javafx.application.Application]: Is it an abstract class?; nested exception is java.lang.InstantiationException
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:215)
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:87)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1326)
... 68 more
Caused by: java.lang.InstantiationException
at java.base/jdk.internal.reflect.InstantiationExceptionConstructorAccessorImpl.newInstance(InstantiationExceptionConstructorAccessorImpl.java:48)
at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490)
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:211)
... 70 more
09-Mar-2023 15:53:55.331 INFO [http-nio-8080-exec-21] org.apache.catalina.startup.HostConfig.deployWAR Deployment of web application archive [C:\Program Files\Apache Software Foundation\Tomcat 9.0\webapps\backend.war] has finished in [17,937] ms
09-Mar-2023 15:54:03.325 INFO [http-nio-8080-exec-23] org.apache.jasper.servlet.TldScanner.scanJars At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
The following are the various code details:
package.json:
{
"name": "frontend",
"version": "0.1.0",
"private": true,
"dependencies": {
"@testing-library/jest-dom": "^5.16.5",
"@testing-library/react": "^13.4.0",
"@testing-library/user-event": "^13.5.0",
"antd": "^5.1.6",
"axios": "^1.2.1",
"bootstrap": "^5.2.3",
"clsx": "^1.2.1",
"moment": "^2.29.4",
"react": "^18.2.0",
"react-bootstrap": "^2.7.0",
"react-calendar": "^4.0.0",
"react-dom": "^18.2.0",
"react-router-dom": "^6.4.3",
"react-scripts": "5.0.1",
"react-table": "^7.8.0",
"validator": "^13.7.0",
"web-vitals": "^2.1.4"
},
"homepage":".",
"scripts": {
"start": "react-scripts start",
"build": "react-scripts build",
"test": "react-scripts test",
"eject": "react-scripts eject"
},
"eslintConfig": {
"extends": [
"react-app",
"react-app/jest"
]
},
"browserslist": {
"production": [
">0.2%",
"not dead",
"not op_mini all"
],
"development": [
"last 1 chrome version",
"last 1 firefox version",
"last 1 safari version"
]
},
"devDependencies": {
"css-loader": "^6.7.3"
}
}
App.js:
class App extends Component {
render() {
return (
<HashRouter>
<div>
<Navigation />
<Routes>
<Route exact path="/" element={<Home />} />
<Route path="/about" element={<About />}/>
<Route path="/contact" element={<Contact />}/>
</Routes>
</div>
</HashRouter>
);
}
}
export default App;
UserController.java
package com.example.demo.controller;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.PutMapping;
import org.springframework.web.bind.annotation.RequestBody;
import com.example.demo.model.User;
import com.example.demo.service.UserService;
@Controller
public class UserController {
@Autowired
UserService userService;
@GetMapping(value = "/**/{path:[^\\.]*}")
public String forward() {
return "forward:/";
}
@GetMapping("/clients")
public List<User> getAllUsers() {
return userService.getAllUsers();
}
}
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.7.9</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>backend_2</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name>backend-3</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>11</java.version>
<tomcat.version>9.0.71</tomcat.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>com.microsoft.sqlserver</groupId>
<artifactId>mssql-jdbc</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-mail</artifactId>
</dependency>
</dependencies>
<build>
<finalName>backend</finalName>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<addResources>true</addResources>
</configuration>
</plugin>
<plugin>
<groupId>com.github.eirslett</groupId>
<artifactId>frontend-maven-plugin</artifactId>
<version>1.12.1</version>
<executions>
<execution>
<id>Install node and npm</id>
<goals>
<goal>install-node-and-npm</goal>
</goals>
<phase>generate-resources</phase>
<configuration>
<nodeVersion>v19.6.1</nodeVersion>
<npmVersion>9.4.0</npmVersion>
</configuration>
</execution>
<!-- running npm install -->
<execution>
<id>npm install</id>
<goals>
<goal>npm</goal>
</goals>
<phase>generate-resources</phase>
<configuration>
<arguments>install</arguments>
</configuration>
</execution>
<!-- build production version -->
<execution>
<id>npm build</id>
<goals>
<goal>npm</goal>
</goals>
<phase>generate-resources</phase>
<configuration>
<arguments>run build</arguments>
</configuration>
</execution>
</executions>
<configuration>
<nodeVersion>v19.6.1</nodeVersion>
<workingDirectory>src/main/frontend</workingDirectory>
</configuration>
</plugin>
<!-- copy react build artigact to spring boot -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-resources-plugin</artifactId>
<executions>
<execution>
<id>Copy JavaScript app into SpringBoot</id>
<phase>process-resources</phase>
<goals>
<goal>copy-resources</goal>
</goals>
<configuration>
<outputDirectory>target/classes/static</outputDirectory>
<resources>
<resource>
<directory>src/main/frontend/build</directory>
<filtering>false</filtering>
</resource>
</resources>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
I think that's about the required files that I'm working with.
The issue boils down to the inability of Apache to initialize the User model, or this is what the error is telling me. However, the Controller is also not an abstract method in any sense, and neither is such a method used anywhere in the project.
For the record, the project builds successfully:
Things I've tried include the following:
authentication issue, but for how this is not relevant to the project (still at a demo stage)
what seemed the most promising, change BrowserRouter to HashRouter and set the homepage to a period, but that led to nothing.
Arrange the context path in the application.properties file, but this is not actually meant for a production version of this app:
# these configuration details cannot be used for external Tomcat, they only work for the embedded version.
#server.servlet.context-path=/
#spring.mvc.servlet.path=/backend-3
changed
@RestControllerto@Controllerin theUserControllerfile.deploying the project on an external Tomcat, which essentially boiled down to having the provided scope in the pom.xml file.
Another suggestion i saw somewhere was to put
@Autowiredon the constructor in the model, but that has no impact on the outcome, and seems neither here, nor there. Otherwise, the constructors is your typical fields, getters/setters, constructor, blank constructor and toString.
UPDATE
- Another thing that I tried was to put the name of the built project,
backend, as a part of the routing in theApp.jsfile, but that was not successful; that was based on the last example connected at the top of the question. I don't think that should be relevant for frontend routing, however?
UPDATE - MAR 10, 2023
There is no version conflict between the version of Apache Tomcat and Java 11, which I'm using:
The issue seems to start after removing the forward slashes from the last question in the index.html file on the static paths and that prevents Apache Tomcat from finding the initial path; seems to be another pathing problem.
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width,initial-scale=1">
<link rel="shortcut icon" href="/favicon.ico">
<title>React App</title>
<link href="static/css/main.9a0fe4f1.css" rel="stylesheet">
</head>
<body>
<div id="root"></div>
<script type="text/javascript" src="static/js/main.f55352b1.js"></script>
</body>
</html>
I could not find this particular trace anywhere else, but the details of it also don't make the most sense to me in the context of the project.
Thank you in advance for any insight!
