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I get the following message when I deploy my war to the Tomcat 7:
nested exception is java.lang.NoClassDefFoundError: javax/el/ELManager
I added <tomcat.version>7.0.61</tomcat.version> to my pom.xml and can now reproduce the error on my development environment.
The error happens after the bean creation, the other changes that were necessary to get the war to run I made.
I tried to change my pom.xml so that it uses old versions which might play nice with tomcat 7, but failed to remove the problem. I don't know which package produces the problem.
See 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 http://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>2.1.2.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.xxx</groupId>
<artifactId>monitormonitor</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>monitormonitor</name>
<description>Web Service Monitoring project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
<start-class>com.xxx.monitormonitor.MonitormonitorApplication</start-class>
<!-- deploying war-file on tomcat 7 -->
<tomcat.version>7.0.61</tomcat.version><!-- nested exception is java.lang.NoClassDefFoundError: javax/el/ELManager -->
<servlet-api.version>3.0.1</servlet-api.version>
</properties>
<packaging>war</packaging>
<dependencies>
<!-- added other version of log4j for invalid byte tag error -->
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-api</artifactId>
<!-- changed version vs. ClassFormatException: Invalid byte tag in constant pool: 19 -->
<!--<version>2.11.1</version>-->
<version>2.7</version>
<!--<scope>provided</scope>-->
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>2.7</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-mail</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<!-- <scope>provided</scope> -->
</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-devtools</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
</dependency>
<!--
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<version>1.1.6.RELEASE</version>
<scope>provided</scope>
</dependency>
-->
<!-- added vs java.lang.NoClassDefFoundError: javax/el/ELManager -->
<!--<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-validation</artifactId>
</dependency>
-->
<dependency>
<groupId>javax.el</groupId>
<artifactId>javax.el-api</artifactId>
<version>2.2.4</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.glassfish.web</groupId>
<artifactId>javax.el</artifactId>
<version>2.2.4</version>
<scope>provided</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<mainClass>com.xxx.monitormonitor.MonitormonitorApplication</mainClass>
</configuration>
</plugin>
</plugins>
</build>
</project>
dependency tree:
[INFO] com.xxx:monitormonitor:war:0.0.1-SNAPSHOT
[INFO] +- org.apache.logging.log4j:log4j-api:jar:2.7:compile
[INFO] +- org.apache.logging.log4j:log4j-core:jar:2.7:compile
[INFO] +- org.springframework.boot:spring-boot-starter-jdbc:jar:2.1.2.RELEASE:compile
[INFO] | +- org.springframework.boot:spring-boot-starter:jar:2.1.2.RELEASE:compile
[INFO] | | +- org.springframework.boot:spring-boot-starter-logging:jar:2.1.2.RELEASE:compile
[INFO] | | | +- ch.qos.logback:logback-classic:jar:1.2.3:compile
[INFO] | | | | \- ch.qos.logback:logback-core:jar:1.2.3:compile
[INFO] | | | +- org.apache.logging.log4j:log4j-to-slf4j:jar:2.11.1:compile
[INFO] | | | \- org.slf4j:jul-to-slf4j:jar:1.7.25:compile
[INFO] | | \- org.yaml:snakeyaml:jar:1.23:runtime
[INFO] | +- com.zaxxer:HikariCP:jar:3.2.0:compile
[INFO] | | \- org.slf4j:slf4j-api:jar:1.7.25:compile
[INFO] | \- org.springframework:spring-jdbc:jar:5.1.4.RELEASE:compile
[INFO] | \- org.springframework:spring-tx:jar:5.1.4.RELEASE:compile
[INFO] +- org.springframework.boot:spring-boot-starter-mail:jar:2.1.2.RELEASE:compile
[INFO] | \- com.sun.mail:javax.mail:jar:1.6.2:compile
[INFO] | \- javax.activation:activation:jar:1.1:compile
[INFO] +- org.springframework.boot:spring-boot-starter-web:jar:2.1.2.RELEASE:compile
[INFO] | +- org.springframework.boot:spring-boot-starter-json:jar:2.1.2.RELEASE:compile
[INFO] | | +- com.fasterxml.jackson.core:jackson-databind:jar:2.9.8:compile
[INFO] | | | +- com.fasterxml.jackson.core:jackson-annotations:jar:2.9.0:compile
[INFO] | | | \- com.fasterxml.jackson.core:jackson-core:jar:2.9.8:compile
[INFO] | | +- com.fasterxml.jackson.datatype:jackson-datatype-jdk8:jar:2.9.8:compile
[INFO] | | +- com.fasterxml.jackson.datatype:jackson-datatype-jsr310:jar:2.9.8:compile
[INFO] | | \- com.fasterxml.jackson.module:jackson-module-parameter-names:jar:2.9.8:compile
[INFO] | +- org.hibernate.validator:hibernate-validator:jar:6.0.14.Final:compile
[INFO] | | +- javax.validation:validation-api:jar:2.0.1.Final:compile
[INFO] | | +- org.jboss.logging:jboss-logging:jar:3.3.2.Final:compile
[INFO] | | \- com.fasterxml:classmate:jar:1.4.0:compile
[INFO] | +- org.springframework:spring-web:jar:5.1.4.RELEASE:compile
[INFO] | \- org.springframework:spring-webmvc:jar:5.1.4.RELEASE:compile
[INFO] | +- org.springframework:spring-aop:jar:5.1.4.RELEASE:compile
[INFO] | \- org.springframework:spring-expression:jar:5.1.4.RELEASE:compile
[INFO] +- org.springframework.boot:spring-boot-starter-tomcat:jar:2.1.2.RELEASE:provided
[INFO] | +- javax.annotation:javax.annotation-api:jar:1.3.2:compile
[INFO] | +- org.apache.tomcat.embed:tomcat-embed-core:jar:7.0.61:provided
[INFO] | +- org.apache.tomcat.embed:tomcat-embed-el:jar:7.0.61:provided
[INFO] | \- org.apache.tomcat.embed:tomcat-embed-websocket:jar:7.0.61:provided
[INFO] +- org.springframework.boot:spring-boot-devtools:jar:2.1.2.RELEASE:runtime
[INFO] | +- org.springframework.boot:spring-boot:jar:2.1.2.RELEASE:compile
[INFO] | \- org.springframework.boot:spring-boot-autoconfigure:jar:2.1.2.RELEASE:compile
[INFO] +- org.springframework.boot:spring-boot-starter-test:jar:2.1.2.RELEASE:test
[INFO] | +- org.springframework.boot:spring-boot-test:jar:2.1.2.RELEASE:test
[INFO] | +- org.springframework.boot:spring-boot-test-autoconfigure:jar:2.1.2.RELEASE:test
[INFO] | +- com.jayway.jsonpath:json-path:jar:2.4.0:test
[INFO] | | \- net.minidev:json-smart:jar:2.3:test
[INFO] | | \- net.minidev:accessors-smart:jar:1.2:test
[INFO] | | \- org.ow2.asm:asm:jar:5.0.4:test
[INFO] | +- junit:junit:jar:4.12:test
[INFO] | +- org.assertj:assertj-core:jar:3.11.1:test
[INFO] | +- org.mockito:mockito-core:jar:2.23.4:test
[INFO] | | +- net.bytebuddy:byte-buddy:jar:1.9.7:test
[INFO] | | +- net.bytebuddy:byte-buddy-agent:jar:1.9.7:test
[INFO] | | \- org.objenesis:objenesis:jar:2.6:test
[INFO] | +- org.hamcrest:hamcrest-core:jar:1.3:test
[INFO] | +- org.hamcrest:hamcrest-library:jar:1.3:test
[INFO] | +- org.skyscreamer:jsonassert:jar:1.5.0:test
[INFO] | | \- com.vaadin.external.google:android-json:jar:0.0.20131108.vaadin1:test
[INFO] | +- org.springframework:spring-core:jar:5.1.4.RELEASE:compile
[INFO] | | \- org.springframework:spring-jcl:jar:5.1.4.RELEASE:compile
[INFO] | +- org.springframework:spring-test:jar:5.1.4.RELEASE:test
[INFO] | \- org.xmlunit:xmlunit-core:jar:2.6.2:test
[INFO] +- org.springframework:spring-context-support:jar:5.1.4.RELEASE:compile
[INFO] | +- org.springframework:spring-beans:jar:5.1.4.RELEASE:compile
[INFO] | \- org.springframework:spring-context:jar:5.1.4.RELEASE:compile
[INFO] +- javax.el:javax.el-api:jar:2.2.4:provided
[INFO] \- org.glassfish.web:javax.el:jar:2.2.4:provided
502
Tomcat. When you run your application, Spring Boot will detect that you have a Spring MVC controller and start up an embedded Apache Tomcat 7 instance, by default. You should be able to test the REST endpoint by opening up your browser and hitting http://localhost:8080/hello/World .
In contrast to standalone applications, Tomcat is installed as a service that can manage multiple applications within the same application process, avoiding the need for a specific setup for each application. In this tutorial, we'll create a simple Spring Boot application and adapt it to work within Tomcat.
Perhaps the simplest way to deploy a WAR file to Tomcat is to copy the file to Tomcat's webapps directory. Copy and paste WAR files into Tomcat's webapps directory to deploy them. Tomcat monitors this webapps directory for changes, and if it finds a new file there, it will attempt to deploy it.
spring boot 2.1.2 release supports any Servlet 3.1+ compatible container.
Tomcat 7 is not one of them
spring boot docs
Use tomcat 8 or beyond http://tomcat.apache.org/whichversion.html
196
Spring Boot 2.1 requires a Servlet 3.1 compatible container. Tomcat 7 is a Servlet 3.0 container so you cannot use it with Spring Boot 2.1.
You'll need to upgrade to Tomcat 8.5.x or 9.0.x.
37
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