In this class spark-atlas-connector/spark-atlas-connector/src/main/scala/com/hortonworks/spark/atlas/AtlasClientConf.scala default password and username is - val CLIENT_USERNAME = ConfigEntry("atlas.client.username", "admin") val CLIENT_PASSWORD = ConfigEntry("atlas.client.password", "admin123") due to this I was facing the same issue as the user configurations on my system do not match these credentials. You can fix it by making changes in the code(change underline password). In regard to this one can pass a atlas-application.properties(property file) as mentioned in ReadMe, but even after passing the above mentioned file I was facing the same issue. ... View more