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From "Paul Yang (JIRA)" <j...@apache.org>
Subject [jira] Created: (HIVE-2002) Expand exceptions caught for metastore operations
Date Wed, 23 Feb 2011 03:19:38 GMT
Expand exceptions caught for metastore operations
-------------------------------------------------

                 Key: HIVE-2002
                 URL: https://issues.apache.org/jira/browse/HIVE-2002
             Project: Hive
          Issue Type: Improvement
          Components: Metastore
    Affects Versions: 0.8.0
            Reporter: Paul Yang
            Priority: Minor


Currently, HiveMetaStore.executeWithRetry() catches two classes of exceptions and retries
the metastore call when such exceptions occur. However, it does not catch some exceptions
that could benefit from a retry:

{code}
Failed with exception javax.jdo.JDOException: Couldnt obtain a new sequence (unique id) :
The MySQL server is running with the --read-only option so it cannot execute this statement
NestedThrowables:
java.sql.SQLException: The MySQL server is running with the --read-only option so it cannot
execute this statement
FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.MoveTask
{code}

In this case, the MySQL server could be temporarily in a read-only mode, and a later DB call
may succeed. To handle these situations, this JIRA proposes to expand the class of exceptions
caught for retries.

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