datastax/spark-cassandra-connector — pull request #369 by pkolaczk (2014-10-28 10:16:10+00:00)
Title: Calculate implicit TypeTags for leaf types in TypeConverter companion ob...

...ject constructor, rather than in targetTypeTag method. Therefore they are initialized all exactly once and there is no risk of race conditions. Synchronize remaining targetTypeTag methods which construct more complex type tags on demand. Fixes #364.