Reproduce steps:

  • create an external table with a location where impala doesn’t have permission to write.
  • run a “insert overwrite table ….” which takes a minute to finish.
  • you will see Impala reports an error like “Error(255): Unknown error 255” after a minute.

Impala should fail fast if it cannot write into the destination location.

https://issues.cloudera.org/browse/IMPALA-815

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