[jira] [Created] (HADOOP-13951) Precommit builds do not adequately protect against test malformed fs permissions.

["Sean Busbey (JIRA)" <ji...@apache.org>]

Sean Busbey created HADOOP-13951:
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             Summary: Precommit builds do not adequately protect against test malformed fs permissions.
                 Key: HADOOP-13951
                 URL: https://issues.apache.org/jira/browse/HADOOP-13951
             Project: Hadoop Common
          Issue Type: Bug
          Components: test
            Reporter: Sean Busbey
            Priority: Critical


Right now this is expressed as failed Precommit-YARN-build jobs when they run on H5 / H6 (see INFRA-13148), but the problem exists for all of the hadoop related precommit jobs.

The issue is that we have some tests in Common (and maybe HDFS) that purposefully set permissions within the {{target/}} directory to simulate a failure to interact with underlying fs data. The test sets some subdirectories to have permissions such that we can no longer delete their contents.

Right now our precommit job include a step post-yetus-test-patch that traverses the target directories and ensure that all subdirectories are modifiable:

{code}
find ${WORKSPACE} -name target | xargs chmod -R u+w
{code}

Unfortunately, if we don't get to that line (say due to an aborted build, or if the call to yetus test-patch exceeds the job timeout), then we are left in a state where there are still subdirectories that can't be modified (including deleted).

Our builds also currently attempt to run a {{git clean}} at the very start of the build after the repo is updated. If we have one of the aforementioned timeouts that leaves a can't-be-deleted test directory, then all future builds on that machine will fail attempting to run the {{git clean}} command.



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