[jira] [Created] (TAJO-372) When an exception except for network issues occurs, the operation should not be repeated.

["Hyunsik Choi (JIRA)" <ji...@apache.org>]

Hyunsik Choi created TAJO-372:
---------------------------------

             Summary: When an exception except for network issues occurs, the operation should not be repeated.
                 Key: TAJO-372
                 URL: https://issues.apache.org/jira/browse/TAJO-372
             Project: Tajo
          Issue Type: Bug
          Components: client
            Reporter: Hyunsik Choi
             Fix For: 0.8-incubating


Currently, TajoClient retries failed operations regardless of network issues. It causes unnecessary retries as follows:

{code}
tajo> select l_shipmode, sum(case when o_orderpriority ='1-URGENT' or o_orderpriority ='2-HIGH' then 1 else 0 end) as high_line_count, sum(case when o_orderpriority <> '1-URGENT' and o_orderpriority <> '2-HIGH' then 1 else 0 end) as low_line_count from orders, lineitem where o_orderkey = l_orderkey and (l_shipmode = 'MAIL' or l_shipmode = 'SHIP') and l_commitdate < l_receiptdate and l_shipdate < l_commitdate and l_receiptdate >= '1994-01-01' and l_receiptdate < '1995-01-01' group by l_shipmode order by l_shipmode;
Failed after attempts=3, exceptions:
org.apache.tajo.catalog.exception.NoSuchTableException: ERROR: relation "orders" does not exist
org.apache.tajo.catalog.exception.NoSuchTableException: ERROR: relation "orders" does not exist
org.apache.tajo.catalog.exception.NoSuchTableException: ERROR: relation "orders" does not exist
{code}

When the problem is caused by other problems except for network issues, the operations should be not retried.



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