We have a bunch of sequence files containing keys & values of custom Writable classes that we wrote, in a HDFS directory.
We manage to view them using Hadoop fs -text. For further ad-hoc analysis, we tried using Hive. Managed to load them as external tables in Hive, however running a simple select count() against the table fails with "WritableName can't load class" in the job output log. Executing add jar <path> does not solve it. Where do we need to place the jar containing the definition of the writable classes?