Behavioral changes denote a marked change in behavior from the previously released
version to this version of Apache Impala.
- Summary:
- Impala now unregisters timed-out queries promptly to free memory,
retaining error messages for clients that return later.
- Previous behavior:
- Timed-out queries remained registered until the session closed,
keeping memory occupied and sometimes leaving failed queries in an active state if not
explicitly closed.
- New behavior:
- Timed-out queries are unregistered immediately to free memory, while
error messages are kept in a new structure so clients can still receive an error message if
they return later.
Apache Jira:
IMPALA-12602
