bq. For example, if one compiles 10 morphlines from the same config file and then run each of those in a separate thread, can that cause any thread safety issues?
There?s no thread safety issue when doing that. (And there?s minimal contention as well, which improves throughput). In fact, that?s exactly what the hbase-indexer does in order to take advantage of multiple CPU cores, and that?s also what users of the Flume Morphline Solr Sink sometimes do.