project is running and working but pom.xml is showing error

Question

I have one spring project which is running and working fine, but the pom.xml is showing a red color error sign as shown in attached image. image of project hierarchy

I am not able to understand why it is showing this error, even my project is running and working fine. Please suggest how to remove this red tag from project hierarchy.

Thanks in advance

POM.XML

<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>
<groupId>TAS_EMS</groupId>
<artifactId>TAS_EMS</artifactId>
<version>0.0.2</version>
<packaging>jar</packaging>
<name>TAS_EMS</name>
<description>TAS_EMS</description>
<organization>
    <name>TATA POWER SED</name>
    <url>http://www.tatapowersed.com</url>
</organization>
<properties>
    <!-- Spring -->
    <spring-framework.version>4.1.6.RELEASE</spring-framework.version>
    <springboot-framework.version>1.2.3.RELEASE</springboot-framework.version>
    <!-- SqLite -->
    <sqlite.version>3.7.2</sqlite.version>
    <!-- Hibernate / JPA -->
    <hibernate.version>4.2.1.Final</hibernate.version>
    <!-- JSON -->
    <jackson.version>2.5.2</jackson.version>
    <!-- Portlet /JSON RPC -->
    <portlet.version>2.0</portlet.version>
    <!--HTTP / JSONRPC -->
    <commons-codec.version>1.9</commons-codec.version>
    <httpcore.version>4.3.3</httpcore.version>
    <!-- REST XML Mapping -->
    <jaxb.version>2.2.12</jaxb.version>

</properties>

<dependencies>

    <!-- Spring Jetty -->

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
        <version>${springboot-framework.version}</version>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-jetty</artifactId>
        <version>${springboot-framework.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>${spring-framework.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <version>${springboot-framework.version}</version>
        <scope>test</scope>
    </dependency>

    <!-- Spring JDBC -->

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

    <!-- Spring -->

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

    <!-- Hibernate -->

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

    <!-- Log4J -->

    <!-- <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> 
        <version>1.7.12</version> </dependency> -->

    <!-- SQLite database JDBC -->

    <dependency>
        <groupId>org.xerial</groupId>
        <artifactId>sqlite-jdbc</artifactId>
        <version>${sqlite.version}</version>
    </dependency>

    <!-- json dependencies + -->

    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-core</artifactId>
        <version>${jackson.version}</version>
    </dependency>
    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-databind</artifactId>
        <version>${jackson.version}</version>
    </dependency>
    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-annotations</artifactId>
        <version>${jackson.version}</version>
        <optional>true</optional>
    </dependency>

    <!-- | servlet\portlet dependencies + -->
    <dependency>
        <groupId>javax.portlet</groupId>
        <artifactId>portlet-api</artifactId>
        <version>${portlet.version}</version>
        <optional>true</optional>
        <scope>provided</scope>
    </dependency>



    <!-- | Rest XML Mapping + -->

    <dependency>
        <groupId>javax.xml.bind</groupId>
        <artifactId>jaxb-api</artifactId>
        <version>${jaxb.version}</version>
    </dependency>

    <!-- <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-security</artifactId> 
        <version>1.2.3.RELEASE</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> 
        <artifactId>spring-boot-actuator</artifactId> <version>1.2.3.RELEASE</version> 
        </dependency> -->
    <dependency>
        <groupId>org.neo4j</groupId>
        <artifactId>neo4j-cypher-compiler-2.1</artifactId>
        <version>2.1.5</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-solr</artifactId>
        <version>1.2.3.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>commons-httpclient</groupId>
        <artifactId>commons-httpclient</artifactId>
        <version>3.1</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>
            spring-boot-starter-data-elasticsearch
        </artifactId>
        <version>1.2.3.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.apache.activemq</groupId>
        <artifactId>activemq-client</artifactId>
        <version>5.10.1</version>
    </dependency>
</dependencies>

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>




        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-eclipse-plugin</artifactId>
            <version>2.9</version>
            <configuration>
                <downloadSources>true</downloadSources>
                <downloadJavadocs>false</downloadJavadocs>
            </configuration>
        </plugin>


        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>2.3.2</version>
            <configuration>
                <source>1.7</source>
                <target>1.7</target>
            </configuration>
        </plugin>


        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-jar-plugin</artifactId>
            <configuration>

                <archive>
                    <manifest>
                        <addClasspath>true</addClasspath>
                        <mainClass>com.tpcsed.tasems.app.service.StartApp</mainClass>
                        <classpathPrefix>dependency-jars/</classpathPrefix>
                    </manifest>
                </archive>
            </configuration>
        </plugin>


        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-dependency-plugin</artifactId>
            <version>2.5.1</version>
            <executions>
                <execution>
                    <id>copy-dependencies</id>
                    <phase>package</phase>
                    <goals>
                        <goal>copy-dependencies</goal>
                    </goals>
                    <configuration>
                        <includeScope>runtime</includeScope>
                        <outputDirectory>${project.build.directory}/dependency-jars/</outputDirectory>
                    </configuration>
                </execution>
            </executions>
        </plugin>


    </plugins>
</build>

Answer 1

I got the same error as mentioned above. To resolve the error i simply change the packaging type of the application from JAR to WAR.

This resolve the error. Make sure to update the project after changing the configuration.

Here is my pom file

<?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>2.1.5.RELEASE</version>
        <relativePath /> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.shubhasish.boot.practice</groupId>
    <artifactId>spring-boot-practice</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>war</packaging>
    <name>spring-boot-practice</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
        <maven.compiler.target>1.8</maven.compiler.target>
        <maven.compiler.source>1.8</maven.compiler.source>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-devtools -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
        </dependency>
    </dependencies>

    <build>
        <pluginManagement>
            <plugins>
                <plugin>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-maven-plugin</artifactId>
                </plugin>
            </plugins>
        </pluginManagement>
    </build>

</project>

Answer 2

Add below lines in your pom.xml in section:

<plugin>
 <groupId>org.apache.maven.plugins</groupId>
 <artifactId>maven-jar-plugin</artifactId>
 <version>3.1.1</version>
</plugin>

Then update the project from maven by right click on Project folder -> Maven -> Update Project

Done!!

Reference: https://github.com/sarl/sarl/issues/921#issuecomment-503858707

Answer 3

eclipse 有时会无缘无故地出错，请尝试选择全部->复制->删除，然后粘贴内容并保存，它可能会有所帮助。

Answer 4

Could you post the pom.xml and show the error that Eclipse throws?

Eclipse does this sometimes.

You can try different things:

1) If you can, disable validation: go to Window->Preferences choose "Validation" in the left Menu (it's right below "Terminal"). Click "Disable all" then "Apply" 2) run a maven configuration with the Goals "clean package" 3) restart Eclipse

If you see no errors in your source code that means that all your dependencies where imported successfully

Answer 5

请参阅此处回答的错误场景的这些解决方案。