Andrew Sherman ea13e74497 IMPALA-10309: Use sleep time from a Retry-After header in Impala Shell ...

When Impala Shell receives an http error message (that is a message with
http code greater than or equal to 300), it may sleep for a time before
retrying. If the message contains a 'Retry-After' header that has an
integer value, then this will be used as the time for which to sleep.

The implementation is to use a new HttpError exception (similar to that
used in Impyla) which includes more information from the error message
(including the headers) so that catchers of the exception can use the
'Retry-After' header if appropriate.

TESTING:
    Hand testing with a proxy that uses the 'Retry-After' header.
    Added new tests that use the fault injection framework in
    test_hs2_fault_injection.py

Change-Id: I2b4226e7723d585d61deb4d1d6777aac901bfd93
Reviewed-on: http://gerrit.cloudera.org:8080/16702
Reviewed-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com>
Tested-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com>

2020-11-11 07:08:12 +00:00

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