commit fb735df134652b4131f77e1807684af0cc424647
author Matthew Mulder <mmulder@cloudera.com> Fri Jun 30 16:18:12 2017 -0700
committer Michael Brown <mikeb@cloudera.com> Thu Aug 24 19:41:33 2017 +0000
tree afb8c7e027c07c564fa03ffa27d85a77ad7c6318
parent d03e7d6ce59343924b9659089dc709225630e0fc

IMPALA-5625: stress test: write profile when queries fail

This change writes query profiles as text files for all of the major
query failure reasons in the concurrent_select stress test.

1) Change the --result-hash-log-dir command-line option to --results-dir
   and update the help text.
2) Introduce two new directories under the directory given by the
   --results-dir command-line argument:
     profiles
     result_hashes
3) Move results into the result_hashes directory.
4) Write the query profile to the profiles directory when a query times
   out or gets an error or incorrect results.
5) Remove the query profile from the log output for unexpected mem
   limit exceeded exceptions. Instead, write those to the profiles
   directory as well.

Testing:
Ran the stress test with a driver that changes the hashes of some of the
query results in the runtime info json file to inject incorrect result
failures. Set tight bounds on the mem limit and timeout to ensure there
would be timeouts and exceeded memory limit failures. Restarted the
NameNode mid test run to induce a query failure. That covers the 4 cases
for which an exception is thrown and profile is written for query
failures. Verified that the profiles were written for each kind of
query failure.

Change-Id: I1dbdf5fcf97d6c5681c9fc8fb9eb448bc459b3b0
Reviewed-on: http://gerrit.cloudera.org:8080/7376
Reviewed-by: Michael Brown <mikeb@cloudera.com>
Tested-by: Michael Brown <mikeb@cloudera.com>