While I am not having any trouble building the morphline-solr-sink component, it is dependent on the abandoned kite-sdk, which makes its life very limited.
In addition, the kite-sdk has a dependency on parquet-avro which, according to https://issues.apache.org/jira/browse/FLUME-3403, has vulnerabilities in every available release. Due to these factors I am going to remove the morphline-solr-sink module from Flume for the 1.10.0 release. Ralph