The default log level for org.mongodb.driver appears to be DEBUG as catalina.out is continuously spammed with messages like these:

DEBUG 2018-08-29 05:12:52 cluster:56 - Checking status of *****:27017
DEBUG 2018-08-29 05:12:52 cluster:56 - Updating cluster description to {type=STANDALONE, servers=[

{address=*****:27017, type=STANDALONE, roundTripTime=0.6 ms, state=CONNECTED}

]

Expected result would be not logging these messages unless explicitly configured to do so.