Impala Transparent Query Retries

Transparent query retries will automatically retry any queries that fail due to cluster membership changes. A cluster membership change typically entails a node leaving the cluster before it crashed or for some other reason stopped responding to statestore heartbeats.

Traditionally, if a query runs on a node in the Impala cluster, and that node crashes, then the query will fail and it is up to the user to retry the query. With transparent query retries, the query will be automatically retried.

Transparent query retries are turned off by default, but can be enabled via the RETRY_FAILED_QUERIES query option.

Related information: RETRY_FAILED_QUERIES Query Option