Maven dependencies sometimes do not work and reimport does not resolve

Hi,
I have a frustrating scenario here in which the hadoop dependencies stopped working.  I had a pom.xml and it was working fine, then just stopped working for all of the org.apache.hadoop.*.

The pom.xml is correct, and I have even clicked on the "Import maven dependencies" from the editor - in hopes that IJ would correct itself in whatever internal bug it is hitting. Then i clicked "reimport".

I have tried this multiple times to no avail.

I am on 12.1.3 ultimate.

Is there a bug out there - and is it in process of being addressed?

thanks

import com.monetize.core.meta.MsMeta;
import org.apache.hadoop.mapreduce.Job;         // Import Not found !!

pom.xml:

        <dependency>
            <groupId>org.apache.hadoop</groupId>
            <artifactId>hadoop-core</artifactId>
            <version>1.1.2</version>
        </dependency>