Paul Rogers created IMPALA-8157:
-----------------------------------
Summary: Log exceptions from the FrontEnd
Key: IMPALA-8157
URL: https://issues.apache.org/jira/browse/IMPALA-8157
Project: IMPALA
Issue Type: Improvement
Components: Frontend
Affects Versions: Impala 3.1.0
Reporter: Paul Rogers
Assignee: Fang-Yu Rao
The BE calls into the FE for a variety of operations. Each of these may fail in
expected ways (invalid query, say) or unexpected ways (a code change introduces
a null pointer exception.)
At present, the BE logs only the exception, and only at the INFO level. This
ticket asks to log all unexpected exceptions at the ERROR level. The basic idea
is to extend all FE entry points to do:
{code:java}
try {
// Do the operation
} catch (ExpectedException e) {
// Don't log expected exceptions
throw e;
} catch (Throwable e) {
LOG.error("Something went wrong", e);
throw e;
}
{code}
The above code logs all exceptions except for those that are considered
expected. The job of this ticket is to:
* Find all the entry points
* Identify which, if any, exceptions are expected
* Add logging code with an error message that identifies the operation
This pattern was tested ad-hoc to find a bug during development and seems to
work fine. As. a result, the change is mostly a matter of the above three steps.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
---------------------------------------------------------------------
To unsubscribe, e-mail: issues-all-unsubscr...@impala.apache.org
For additional commands, e-mail: issues-all-h...@impala.apache.org
