Upgrade from JDK 8

[Bilal Ghayad]

Hello;

I have to upgrade from JDK 1.8 for my Spring MVC project as it is outdated.
So what is the recommended JDK to go for it?
Should I go for JDK 11 or 17?

Also, what is the recommended Spring and Maven to be used with the recommended new JDK?

Thanks
Regards
Bilal

[Himai Minh]

If your application involves Docker build images, then go for JDK 17.
Or, you can install both , just in case your application still uses JDK 11.
There should not be any conflict.
In IntelliJ IDE, you can open your project, set the Java compiler to any version either 11 or 17.

[Tim Holloway]

I'm not sure that Java 17 is fully-available everywhere. There's a long-term support (LTS) Java 11, though and even an openJDK version of it.

[Bilal Ghayad]

Currently I am using JDK version 8 (it is outdated).
So, I can understand it is recommended to move to JDK 17.

Regards
Bilal

[Bilal Ghayad]

Is it required from me to upgrade my JDK or I can stay with JDK 8?
The problem that new eclipse versions are not working with JDK 8.

Now, I installed JDK 17, but really I am facing a problem in two things:
1) The pom.xml file: which versions and dependencies?
2)  When I was using JDK 8, I was able to run the application using tomcat7:run, now it is not working and it is giving me a lot of errors.

So shall I stay with JDK 8?
If it is needed to work with JDK 17, so which tomcat version is needed and which spring framework, hibernate and maven versions are needed?

Below is my 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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.aliat</groupId>
<artifactId>alm</artifactId>
<name>ALM</name>
<packaging>war</packaging>
<version>1.0.0-BUILD-SNAPSHOT</version>
<properties>
<java-version>17</java-version>
<org.springframework-version>5.3.15</org.springframework-version>
<org.aspectj-version>1.6.10</org.aspectj-version>
<org.slf4j-version>1.6.6</org.slf4j-version>
<hibernate.version>5.4.32.Final</hibernate.version>
</properties>
<dependencies>
 <!-- com.microsoft.sqlserver -->
       <dependency>
           <groupId>com.microsoft.sqlserver</groupId>
           <artifactId>mssql-jdbc</artifactId>
           <version>8.4.1.jre8</version>
       </dependency>
<!-- Spring -->
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-commons</artifactId>
<version>1.13.1.RELEASE</version>
<exclusions>
<exclusion>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
</exclusion>
<exclusion>
<groupId>org.slf4j</groupId>
<artifactId>jcl-over-slf4j</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-keyvalue</artifactId>
<version>1.2.1.RELEASE</version>
<exclusions>
<exclusion>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
</exclusion>
<exclusion>
<groupId>org.slf4j</groupId>
<artifactId>jcl-over-slf4j</artifactId>
</exclusion>
</exclusions>
</dependency>

<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${org.springframework-version}</version>
<exclusions>
<!-- Exclude Commons Logging in favor of SLF4j -->
<exclusion>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${org.springframework-version}</version>
</dependency>

<!-- Spring ORM -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>${org.springframework-version}</version>
</dependency>

<dependency>
       <groupId>org.springframework</groupId>
       <artifactId>spring-core</artifactId>
       <version>${org.springframework-version}</version>
    </dependency>

<dependency>
       <groupId>org.springframework</groupId>
       <artifactId>spring-tx</artifactId>
       <version>${org.springframework-version}</version>
    </dependency>

<dependency>
       <groupId>org.springframework</groupId>
       <artifactId>spring-beans</artifactId>
       <version>${org.springframework-version}</version>
    </dependency>


<!-- jsch -->

<dependency>
  <groupId>com.jcraft</groupId>
  <artifactId>jsch</artifactId>
  <version>0.1.44-1</version>
</dependency>


<!-- hibernate -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>${hibernate.version}</version>
<exclusions>
   <exclusion>
               <groupId>xml-apis</groupId>
               <artifactId>xml-apis</artifactId>
            </exclusion>
</exclusions>

</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>${hibernate.version}</version>
</dependency>

<dependency>
  <groupId>org.hibernate</groupId>
  <artifactId>hibernate-jpamodelgen</artifactId>
  <version>5.4.32.Final</version>
  <optional>true</optional>
</dependency>

<dependency>
<groupId>javax.xml.bind</groupId>
<artifactId>jaxb-api</artifactId>
<version>2.2.11</version>
</dependency>


<!-- oracle -->

<dependency>
<groupId>com.oracle.database.jdbc</groupId>
<artifactId>ojdbc8</artifactId>
<version>12.2.0.1</version>
</dependency>


<!-- poi Excel -->

<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>3.9</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>3.9</version>
<exclusions>
<exclusion>
<groupId>org.apache.xmlbeans</groupId>
<artifactId>xmlbeans</artifactId>
</exclusion>
<exclusion>
<groupId>xml-apis</groupId>
<artifactId>xml-apis</artifactId>
</exclusion>
</exclusions>
</dependency>

<!-- ENd poi Excel -->

<dependency>
<groupId>javax.validation</groupId>
<artifactId>validation-api</artifactId>
<version>1.1.0.Final</version>
</dependency>

<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>7.0.2.Final</version>
</dependency>

<!-- AspectJ -->

<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjrt</artifactId>
<version>${org.aspectj-version}</version>
</dependency>

<dependency>
<groupId>cglib</groupId>
<artifactId>cglib</artifactId>
<version>3.0</version>
</dependency>

<!-- JSON -->

<dependency>
<groupId>com.googlecode.json-simple</groupId>
<artifactId>json-simple</artifactId>
<version>1.1.1</version>
</dependency>


<!-- Logging -->

<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${org.slf4j-version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>jcl-over-slf4j</artifactId>
<version>${org.slf4j-version}</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>${org.slf4j-version}</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.16</version>
</dependency>

<!-- @Inject -->

<dependency>
<groupId>javax.inject</groupId>
<artifactId>javax.inject</artifactId>
<version>1</version>
</dependency>


<!-- Servlet -->

<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
<scope>provided</scope>
</dependency>


<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>


<!-- json -->

<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.8.6</version>
</dependency>


<!-- json2 -->

<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.8.7</version>
</dependency>

<!-- apahce lang3 -->

<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.9</version>
</dependency>

<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.5</version>
</dependency>

<!-- Test -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.7</version>
<scope>test</scope>
</dependency>

<!-- Email -->

<dependency>
<groupId>com.sun.mail</groupId>
<artifactId>javax.mail</artifactId>
<version>1.5.5</version>
</dependency>
<!--  Google Maps Dependencies -->
<dependency>
<groupId>com.google.maps</groupId>
<artifactId>google-maps-services</artifactId>
<version>1.0.1</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-simple</artifactId>
<version>1.7.25</version>
</dependency>

</dependencies>
<build>
<plugins>
<plugin>
<artifactId>maven-eclipse-plugin</artifactId>
<version>2.9</version>
<configuration>
<additionalProjectnatures>
<projectnature>org.springframework.ide.eclipse.core.springnature</projectnature>
</additionalProjectnatures>
<additionalBuildcommands>
<buildcommand>org.springframework.ide.eclipse.core.springbuilder</buildcommand>
</additionalBuildcommands>
<downloadSources>true</downloadSources>
<downloadJavadocs>true</downloadJavadocs>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.1</version>
<configuration>
<source>17</source>
<target>17</target>
<compilerArgument>-Xlint:all</compilerArgument>
<showWarnings>true</showWarnings>
<showDeprecation>true</showDeprecation>
</configuration>
</plugin>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>3.3.1</version>
<configuration>
<warSourceDirectory>WebContent</warSourceDirectory>
<failOnMissingWebXml>false</failOnMissingWebXml>

</configuration>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>exec-maven-plugin</artifactId>
<version>1.2.1</version>
<configuration>
<mainClass>org.test.int1.Main</mainClass>

</configuration>
</plugin>

<plugin>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<version>2.2</version>
<configuration>
<path>/</path>
<contextReloadable>true</contextReloadable>
<port>8080</port>
</configuration>
</plugin>
</plugins>
</build>

</project>

Regards
Bilal

[Tim Holloway]

I have found that Java 11, Tomcat 3.9 and Maven 3.8 are a stable working point at the moment. I have not attempted to live on the "bleeding edge".

Java 8 doesn't work for newer versions of Log4J, I believe. Also, its primary support from Oracle ends at the end of this month, though as an LTS release, it will continue to have some support until 2030.

Tomcat 9 is the last version of Tomcat before the switch to jakarta, I think, so I picked it so as to be as up to date as I could be without having to refactor a lot of code. Maven 3.8 is just what I happened to have already installed last time I went to work and it still runs. I'm uncertain about changes rumored for Maven 4.

One of the principal things you'll see past Java 8 is that certain introspection features changed. It may not affect your code as much as it affects code in Tomcat, Spring, and Hibernate and in other Maven dependencies.

Speaking of Maven, if you use Code tags to wrap around XML it makes it a lot easier to read here on the Ranch.

[Bilal Ghayad]

I have found that Java 11, Tomcat 3.9 and Maven 3.8 are a stable working point at the moment. I have not attempted to live on the "bleeding edge".

Tomcat 3.9? That is very very old, it is older than tomcat 7. Why to go for this very old version??

I am placing the pom.xml below between code:

<?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/maven-v4_0_0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<groupId>com.aliat</groupId>
	<artifactId>alm</artifactId>
	<name>ALM</name>
	<packaging>war</packaging>
	<version>1.0.0-BUILD-SNAPSHOT</version>
	<properties>
		<java-version>17</java-version>
		<org.springframework-version>5.3.15</org.springframework-version>
		<org.aspectj-version>1.6.10</org.aspectj-version>
		<org.slf4j-version>1.6.6</org.slf4j-version>
 		<hibernate.version>5.4.32.Final</hibernate.version>
	</properties>
	<dependencies>
		  <!-- com.microsoft.sqlserver -->
        <dependency>
            <groupId>com.microsoft.sqlserver</groupId>
            <artifactId>mssql-jdbc</artifactId>
            <version>8.4.1.jre8</version>
        </dependency>
		<!-- Spring -->
		<dependency>
			<groupId>org.springframework.data</groupId>
			<artifactId>spring-data-commons</artifactId>
			<version>1.13.1.RELEASE</version>
			<exclusions>
				<exclusion>
					<groupId>org.slf4j</groupId>
					<artifactId>slf4j-api</artifactId>
				</exclusion>
				<exclusion>
					<groupId>org.slf4j</groupId>
					<artifactId>jcl-over-slf4j</artifactId>
				</exclusion>
			</exclusions>
		</dependency>
		<dependency>
			<groupId>org.springframework.data</groupId>
			<artifactId>spring-data-keyvalue</artifactId>
			<version>1.2.1.RELEASE</version>
			<exclusions>
				<exclusion>
					<groupId>org.slf4j</groupId>
					<artifactId>slf4j-api</artifactId>
				</exclusion>
				<exclusion>
					<groupId>org.slf4j</groupId>
					<artifactId>jcl-over-slf4j</artifactId>
				</exclusion>
			</exclusions>
		</dependency>
		
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-context</artifactId>
			<version>${org.springframework-version}</version>
			<exclusions>
				<!-- Exclude Commons Logging in favor of SLF4j -->				
				<exclusion>
					<groupId>commons-logging</groupId>
					<artifactId>commons-logging</artifactId>
				</exclusion>				
			</exclusions>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-webmvc</artifactId>
			<version>${org.springframework-version}</version>
		</dependency>
		
				<!-- Spring ORM -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-orm</artifactId>
			<version>${org.springframework-version}</version>
		</dependency>
		
		<dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-core</artifactId>
        <version>${org.springframework-version}</version>
    	</dependency>
		
		<dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-tx</artifactId>
        <version>${org.springframework-version}</version>
    	</dependency>
		
		<dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-beans</artifactId>
        <version>${org.springframework-version}</version>
    	</dependency>

		
		<!-- jsch -->

		<dependency>
  			<groupId>com.jcraft</groupId>
  			<artifactId>jsch</artifactId>
  			<version>0.1.44-1</version>
		</dependency>


		<!-- hibernate -->
		<dependency>
			<groupId>org.hibernate</groupId>
			<artifactId>hibernate-core</artifactId>
			<version>${hibernate.version}</version>
			<exclusions>
			    <exclusion>
                <groupId>xml-apis</groupId>
                <artifactId>xml-apis</artifactId>
            	</exclusion>
			</exclusions>

		</dependency>
		<dependency>
			<groupId>org.hibernate</groupId>
			<artifactId>hibernate-entitymanager</artifactId>
			<version>${hibernate.version}</version>
		</dependency>
		
		<dependency>
  			<groupId>org.hibernate</groupId>
  			<artifactId>hibernate-jpamodelgen</artifactId>
   			<version>5.4.32.Final</version>
  			<optional>true</optional>
		</dependency>
		
		<dependency>
			<groupId>javax.xml.bind</groupId>
			<artifactId>jaxb-api</artifactId>
			<version>2.2.11</version>
		</dependency>
		
		
		<!-- oracle -->

		<dependency>
			<groupId>com.oracle.database.jdbc</groupId>
			<artifactId>ojdbc8</artifactId>
			<version>12.2.0.1</version>
		</dependency>


		<!-- poi Excel -->

		<dependency>
			<groupId>org.apache.poi</groupId>
			<artifactId>poi</artifactId>
			<version>3.9</version>			
		</dependency>
		<dependency>
			<groupId>org.apache.poi</groupId>
			<artifactId>poi-ooxml</artifactId>
			<version>3.9</version>
			<exclusions>
				<exclusion>
					<groupId>org.apache.xmlbeans</groupId>
					<artifactId>xmlbeans</artifactId>
				</exclusion>
				<exclusion>
					<groupId>xml-apis</groupId>
					<artifactId>xml-apis</artifactId>
				</exclusion>
			</exclusions>
		</dependency>
		
		<!-- ENd poi Excel -->
		
		<dependency>
			<groupId>javax.validation</groupId>
			<artifactId>validation-api</artifactId>
			<version>1.1.0.Final</version>
		</dependency>
						
		<dependency>
			<groupId>org.hibernate</groupId>
			<artifactId>hibernate-validator</artifactId>
			<version>7.0.2.Final</version>
		</dependency>

		<!-- AspectJ -->

		<dependency>
			<groupId>org.aspectj</groupId>
			<artifactId>aspectjrt</artifactId>
			<version>${org.aspectj-version}</version>
		</dependency>

		<dependency>
			<groupId>cglib</groupId>
			<artifactId>cglib</artifactId>
			<version>3.0</version>
		</dependency>

		<!-- JSON -->

		<dependency>
			<groupId>com.googlecode.json-simple</groupId>
			<artifactId>json-simple</artifactId>
			<version>1.1.1</version>
		</dependency>


		<!-- Logging -->
		
		<dependency>
			<groupId>org.slf4j</groupId>
			<artifactId>slf4j-api</artifactId>
			<version>${org.slf4j-version}</version>
		</dependency>
		<dependency>
			<groupId>org.slf4j</groupId>
			<artifactId>jcl-over-slf4j</artifactId>
			<version>${org.slf4j-version}</version>
			<scope>runtime</scope>
		</dependency>
		<dependency>
			<groupId>org.slf4j</groupId>
			<artifactId>slf4j-log4j12</artifactId>
			<version>${org.slf4j-version}</version>
			<scope>runtime</scope>
		</dependency>
		<dependency>
			<groupId>log4j</groupId>
			<artifactId>log4j</artifactId>
			<version>1.2.16</version>
		</dependency>

		<!-- @Inject -->
						
		<dependency>
			<groupId>javax.inject</groupId>
			<artifactId>javax.inject</artifactId>
			<version>1</version>			
		</dependency>


		<!-- Servlet -->

		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>servlet-api</artifactId>
			<version>2.5</version>
			<scope>provided</scope>
		</dependency>
		
		
		<dependency>
			<groupId>javax.servlet.jsp</groupId>
			<artifactId>jsp-api</artifactId>
			<version>2.1</version>
			<scope>provided</scope>
		</dependency>
		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>jstl</artifactId>
			<version>1.2</version>
		</dependency>
		
		
		<!-- json -->

		<dependency>
			<groupId>com.google.code.gson</groupId>
			<artifactId>gson</artifactId>
			<version>2.8.6</version>
		</dependency>
		

		<!-- json2 -->

		<dependency>
			<groupId>com.fasterxml.jackson.core</groupId>
			<artifactId>jackson-databind</artifactId>
			<version>2.8.7</version>
		</dependency>

		<!-- apahce lang3 -->

		<dependency>
			<groupId>org.apache.commons</groupId>
			<artifactId>commons-lang3</artifactId>
			<version>3.9</version>
		</dependency>
		
		<dependency>
			<groupId>commons-io</groupId>
			<artifactId>commons-io</artifactId>
			<version>2.5</version>
		</dependency>

		<!-- Test -->
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>4.7</version>
			<scope>test</scope>
		</dependency>

		<!-- Email -->

		<dependency>
			<groupId>com.sun.mail</groupId>
			<artifactId>javax.mail</artifactId>
			<version>1.5.5</version>
		</dependency>
<!--  Google Maps Dependencies -->
		<dependency>
			<groupId>com.google.maps</groupId>
			<artifactId>google-maps-services</artifactId>
			<version>1.0.1</version>
		</dependency>
		<dependency>
			<groupId>org.slf4j</groupId>
			<artifactId>slf4j-simple</artifactId>
			<version>1.7.25</version>
		</dependency>		

	</dependencies>
	<build>
		<plugins>
			<plugin>
				<artifactId>maven-eclipse-plugin</artifactId>
				<version>2.9</version>
				<configuration>
					<additionalProjectnatures>
						<projectnature>org.springframework.ide.eclipse.core.springnature</projectnature>
					</additionalProjectnatures>
					<additionalBuildcommands>
						<buildcommand>org.springframework.ide.eclipse.core.springbuilder</buildcommand>
					</additionalBuildcommands>
					<downloadSources>true</downloadSources>
					<downloadJavadocs>true</downloadJavadocs>					
				</configuration>
			</plugin>
			<plugin>
				<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-compiler-plugin</artifactId>
				<version>3.8.1</version>				
				<configuration>
					<source>17</source>
					<target>17</target>
					<compilerArgument>-Xlint:all</compilerArgument>
					<showWarnings>true</showWarnings>
					<showDeprecation>true</showDeprecation>
				</configuration>
			</plugin>
			<plugin>
				<artifactId>maven-war-plugin</artifactId>
				<version>3.3.1</version>
				<configuration>
					<warSourceDirectory>WebContent</warSourceDirectory>
					<failOnMissingWebXml>false</failOnMissingWebXml>
					
				</configuration>
			</plugin>
			<plugin>
				<groupId>org.codehaus.mojo</groupId>
				<artifactId>exec-maven-plugin</artifactId>
				<version>1.2.1</version>
				<configuration>
					<mainClass>org.test.int1.Main</mainClass>
					
				</configuration>
			</plugin>
			
			<plugin>
				<groupId>org.apache.tomcat.maven</groupId>
				<artifactId>tomcat7-maven-plugin</artifactId>
				<version>2.2</version>
				<configuration>
					<path>/</path>
					<contextReloadable>true</contextReloadable>
					<port>8080</port>
				</configuration>
			</plugin>
		</plugins>
	</build>

</project>

Regards
Bilal

[Tim Holloway]

Bilal Ghayad wrote:

I have found that Java 11, Tomcat 3.9 and Maven 3.8 are a stable working point at the moment. I have not attempted to live on the "bleeding edge".

Tomcat 3.9? That is very very old, it is older than tomcat 7. Why to go for this very old version??

No, I meant Tomcat 9. The "3.9" was a typo. Not even sure if there ever was a 3.9.

[Bilal Ghayad]

OK and how you run tomcat?
You run it using tomcat:run or how?

Do you have the pom.xml file?

Regards
Bilal

[Tim Holloway]

I usually launch Tomcat either from my IDE or the command line. Although for production servers, I set it up to start as a system service.

[Bilal Ghayad]

I usually launch Tomcat either from my IDE or the command line.

I mean from eclipse, how?

Because, when I was using JDK 8, I was running the Spring MVC application with tomcat as following:

Run As --> Maven build --> At the Goals, I type: tomcat7:run

And of course in my pom.xml and as you saw, I was having the below configuration:

			<plugin>
				<groupId>org.apache.tomcat.maven</groupId>
				<artifactId>tomcat7-maven-plugin</artifactId>
				<version>2.2</version>
				<configuration>
					<path>/</path>
					<contextReloadable>true</contextReloadable>
					<port>8080</port>
				</configuration>
			</plugin>

So my question: are you running tomcat9 using tomcat:run when running the application by Maven build, or you configured tomcat 9 as server and you are running it using Run On Server?

Regards
Bilal

[Tim Holloway]

A lot of people use Maven to deploy and run webapp servers (not just Tomcat), but I've never done so - at least not until I started playing with Spring Boot.

I have the "Tomcat Eclipse Plugin" (formerly known as sysdeo/mongrel) installed in Eclipse. I use Maven to build the WAR, and I have a Context file installed in Tomcat that lists the filesystem location of that WAR (in my Maven target directory). The plugin puts a set of buttons and a Tomcat menu into Eclipse so I can start, stop, and restart Tomcat and automatically attach it for debugging.

I know that Eclipse JEE comes with a WTP plugin pre-installed, but I loathe what it does to Tomcat, which is why I've always preferred the sysdeo plugin.