Pentaho 4.4 Database connectivity issue
Based on your timestamps, the 2nd section of errors are probably caused by your connection reset error above.

As for the connection reset error, it is probably being caused by some limit configured in pentaho or your database server. Is there anything helpful in your database logs?

If its not something obvious on the db logs... I haven't had too much experience with pentaho, can you provide the job that is failing in a text format? And just checking, how many rows are in your table?