For example, stage UploadTestArtifacts passed successfully, but failure entries were inserted for stage UploadTestArtifacts.

mysql> select * from buildStageTable where id='38559826';
+----------+----------+---------------------+-------+--------+---------------------+---------------------+---------------------+-------+
| id       | build_id | name                | board | status | last_updated        | start_time          | finish_time         | final |
+----------+----------+---------------------+-------+--------+---------------------+---------------------+---------------------+-------+
| 38559826 |  1337105 | UploadTestArtifacts | cyan  | pass   | 2017-02-21 18:08:21 | 2017-02-21 17:57:20 | 2017-02-21 18:08:21 |     1 |





mysql> select * from failureTable  where build_stage_id='38559826';
+---------+----------------+------------------+-------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+--------------------+------------+---------------------+
| id      | build_stage_id | outer_failure_id | exception_type    | exception_message                                                                                                                                                                                                                                | exception_category | extra_info | timestamp           |
+---------+----------------+------------------+-------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+--------------------+------------+---------------------+
| 1913128 |       38559826 |             NULL | BackgroundFailure | <class 'chromite.lib.failures_lib.StepFailure'>: 
Traceback (most recent call last):
  File "/b/cbuild.cyan/chromite/lib/parallel.py", line 440, in _Run
    self._task(*self._task_args, **self._task_kwargs)
  File "/b/cbuild.cyan/chromite/c | unknown            | NULL       | 2017-02-21 19:44:26 |
| 1913129 |       38559826 |          1913128 | StepFailure       |                                                                                                                                                                                                                                                  | unknown            | NULL       | 2017-02-21 19:44:26 |
+---------+----------------+------------------+-------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+--------------------+------------+---------------------+

The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/chromite/+/ce7e9bb309bf9c90d403d08cad4562adb0f7471d

commit ce7e9bb309bf9c90d403d08cad4562adb0f7471d
Author: Ningning Xia <nxia@chromium.org>
Date: Wed Mar 01 21:19:49 2017

generic_builders: report stage status and stage failures.

In builders._runParallelStages exception handler, for stage without
stage status or with stage status in non_failure_status, if no failures
message found in failureTable, report stage failures for this stage to
failureTable; for stage with stage status not None and not in
completed_status, mark stage status as final status 'fail' in
buildTable.

BUG= chromium:694732 
TEST=unit_tests

Change-Id: I3bb4715ed0aa4fdde7dc36f6cdb9ab033f8ec3b8
Reviewed-on: https://chromium-review.googlesource.com/446900
Commit-Ready: Ningning Xia <nxia@chromium.org>
Tested-by: Ningning Xia <nxia@chromium.org>
Reviewed-by: Aviv Keshet <akeshet@chromium.org>

[modify] https://crrev.com/ce7e9bb309bf9c90d403d08cad4562adb0f7471d/lib/cidb.py
[add] https://crrev.com/ce7e9bb309bf9c90d403d08cad4562adb0f7471d/cbuildbot/builders/generic_builders_unittest
[add] https://crrev.com/ce7e9bb309bf9c90d403d08cad4562adb0f7471d/cbuildbot/builders/generic_builders_unittest.py
[modify] https://crrev.com/ce7e9bb309bf9c90d403d08cad4562adb0f7471d/lib/fake_cidb.py
[modify] https://crrev.com/ce7e9bb309bf9c90d403d08cad4562adb0f7471d/cbuildbot/builders/generic_builders.py
[modify] https://crrev.com/ce7e9bb309bf9c90d403d08cad4562adb0f7471d/lib/cidb_integration_test.py