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The type org.apache.activemq.jms.pool.PooledConnectionFactory cannot be resolved.
It is indirectly referenced from required .class filesquestions
Now you use Maven to manage jars. Maven jars also have dependencies on other jars. You can find the dependencies by looking at the corresponding POM files
For example: activemq-pool-5.10.0.pom
reasons
This class refers to other classes, but this class is not added to classpath
solutions
Check the POM of the corresponding jar to see if any dependent jars have not been introduced
reflection
Maven actually relies on more jars than or equal to the dependency you added
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