When entering into `getObjectInstance()` method for `ObjectFactory` implementations, Tomcat / TomEE is not using `environment`, so it gets passed in as `null`. A quick fix to this bug would be to check if `environment` is null before trying to access the hashtable.

• Reference Documentation
• Legacy Driver Reference
• Sync Driver Reference

Example Stack Trace:

29-Jan-2019 11:39:54.452 SEVERE [localhost-startStop-1] org.apache.tomee.catalina.TomcatResourceFactory.create Can't create resource null
 java.lang.NullPointerException
	at com.mongodb.client.jndi.MongoClientFactory.getObjectInstance(MongoClientFactory.java:72)
...