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From "Nico Kruber (JIRA)" <j...@apache.org>
Subject [jira] [Created] (FLINK-8148) Test instability in YarnFileStageTest
Date Fri, 24 Nov 2017 13:54:00 GMT
Nico Kruber created FLINK-8148:
----------------------------------

             Summary: Test instability in YarnFileStageTest
                 Key: FLINK-8148
                 URL: https://issues.apache.org/jira/browse/FLINK-8148
             Project: Flink
          Issue Type: Bug
          Components: Tests, YARN
    Affects Versions: 1.4.0
            Reporter: Nico Kruber
            Assignee: Nico Kruber
            Priority: Critical


{code}
Running org.apache.flink.yarn.YarnFileStageTestS3ITCase
Tests run: 3, Failures: 1, Errors: 0, Skipped: 1, Time elapsed: 13.152 sec <<< FAILURE!
- in org.apache.flink.yarn.YarnFileStageTestS3ITCase
testRecursiveUploadForYarnS3(org.apache.flink.yarn.YarnFileStageTestS3ITCase)  Time elapsed:
8.515 sec  <<< FAILURE!
java.lang.AssertionError: null
	at org.junit.Assert.fail(Assert.java:86)
	at org.junit.Assert.assertTrue(Assert.java:41)
	at org.junit.Assert.assertFalse(Assert.java:64)
	at org.junit.Assert.assertFalse(Assert.java:74)
	at org.apache.flink.yarn.YarnFileStageTestS3ITCase.testRecursiveUploadForYarn(YarnFileStageTestS3ITCase.java:171)
	at org.apache.flink.yarn.YarnFileStageTestS3ITCase.testRecursiveUploadForYarnS3(YarnFileStageTestS3ITCase.java:192)
{code}

from https://travis-ci.org/apache/flink/jobs/305861539

{{YarnFileStageTestS3ITCase.testRecursiveUploadForYarn}} verifies that the test directory
used is cleaned up by {{YarnFileStageTest.testCopyFromLocalRecursive}} which should clean
up the directory (in a {{finally}} block). However, for S3, we may not always see our own
deletes.

Quoting from https://aws.amazon.com/s3/faqs/ here:
{quote}Q: What data consistency model does Amazon S3 employ?
Amazon S3 buckets in all Regions provide read-after-write consistency for PUTS of new objects
and eventual consistency for overwrite PUTS and DELETES.{quote}



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