[FIXED] Invalid classes root from intellij for an existing jar in maven local repo

Issue

As shown in following screenshot a maven library is marked as red - even though it does exist in local maven repo

/Users/steve/.m2/repository/com/typesafe/akka/akka-remote_2.10/2.2.3/akka-remote_2.10-2.2.3.jar

src="https://i.stack.imgur.com/4kirj.png" alt="enter image description here">

But that file does exist on the local filesystem: Here it is on the local file system

21:43:12/scaladem:35 $ls -l /Users/steve/.m2/repository/com/typesafe/akka/akka-remote_2.10/2.2.3/akka-remote_2.10-2.2.3.jar
-rw-r--r--  1 steve  staff  1277288 Feb 21 21:42 /Users/steve/.m2/repository/com/typesafe/akka/akka-remote_2.10/2.2.3/akka-remote_2.10-2.2.3.jar

Here are maven entries in pom.xml

    <dependency>
        <groupId>com.typesafe.akka</groupId>
        <artifactId>akka-actor_2.10</artifactId>
        <version>2.2.3</version>
    </dependency>
    <dependency>
        <groupId>com.typesafe.akka</groupId>
        <artifactId>akka-remote_2.10</artifactId>
        <version>2.2.3</version>
    </dependency>

Note also:

mvn package

works fine from the command line

Solution

It just happened to me. Re-import didn't work. I solved it by

1. Remove your dependency from the POM
2. Save the POM (assume you have "Enable Auto-Import", if not, check "Import Maven projects automatically" from settings)
3. Add the dependency back

It is basically re-import, but it does the magic for me. Good luck.

Answered By - Man Coding
Answer Checked By - Mildred Charles (JavaFixing Admin)