When trying to use JPPF client library log4j gets sucked into project by transitive dependencies.

Rather than that - jppf client (or - to be more specific - jppf commons) should depend on slf4j api only, leaving decision of which logger binding to use to client application.

So from dependencies below all but first should be removed.

<dependency>
    <groupId>org.slf4j</groupId>
    <artifactId>slf4j-api</artifactId>
    <version>1.7.25</version>
</dependency>
<dependency>
    <groupId>org.slf4j</groupId>
    <artifactId>slf4j-log4j12</artifactId>
    <version>1.7.25</version>
    <scope>runtime</scope>
</dependency>
<dependency>
    <groupId>log4j</groupId>
    <artifactId>log4j</artifactId>
    <version>1.2.15</version>
    <scope>runtime</scope>
</dependency>

If node/driver/web ui/admin ui want to use log4j for logging - it should become their runtime dependency.