If you're using our ElasticSearch plugin with Rosette Base Linguistics (the "RBL SDK"), and are trying to use your own User-Defined Dictionary (UDD), you might be running into a Java security issue ("access denied").
Elasticsearch uses a Java security manager, which, by default, does not let you read arbitrary files from the file system. You have to give it permission. For example, if you put the following into the file $HOME/rbl.policy: