Missing artifact com.sun.jdmk:jmxtools:jar:1.2.1

It’s not included anymore due to licensing issues if I remember correctly. If you don’t need jms functionality you can exclude jms from log4j dependency:

<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.15</version>
<exclusions>
    <exclusion>
        <groupId>com.sun.jmx</groupId>
        <artifactId>jmxri</artifactId>
    </exclusion>
    <exclusion>
        <groupId>com.sun.jdmk</groupId>
        <artifactId>jmxtools</artifactId>
    </exclusion>
    <exclusion>
            <groupId>javax.jms</groupId>
            <artifactId>jms</artifactId>
    </exclusion>
</exclusions>
</dependency>