What's New in Apache Impala
This topic lists new features for Apache Impala in this release of Cloudera Runtime.
Query Transparent Retries for Some Transient Errors
SELECTquery fails due to a cluster membership change, the Coordinator will cancel and
unregister the running query and then launch a retry of the query. For e.g., if one of the
executor nodes fails during query execution, the query fails but is transparently
re-executed, either with the executor node immediately replaced, or with a temporarily
reduced number of executor nodes. This feature will support retrying the entire query and
NOT the individual query fragments. INSERT and DDL queries will NOT be retried.
For details, see Retry Failed Queries.