[HADOOP-11617] Several tests are not stable (on OpenJDK / x86_64 / RHEL 7.1)

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved

Environment

RHEL 7.1 / x86_64

• Assignee: Unassigned
• Reporter: Tony Reix
• Created: 20/Feb/15 16:20
• Updated: 03/Mar/15 14:08

Description

I'm now porting Hadoop 2.4.1 on PPC64 HW.
In order to have an idea about the stability of the tests, I've run several times all Hadoop tests in a RHEL 7.1 / x86_64 / OpenJDK environment.
I've run it 12 times, for now, on the EXACT same environment.
Using some tool, I have extracted the list of tests that do not always produce the same results, listed below, showing some test unstability.

I 'm now doing the same for version 2.6.0 on OpenJDK/Ubuntu/x86_64.

Report gives:
test-name N: T F E S |
where:

• N is the number of the test log file
• and:
  T: Tests run
  F: Failure
  E: Error
  S: Skipped

As an example (see below for full data):
hdfs.server.datanode.TestDeleteBlockPool 0: 2 0 0 0 |
........
hdfs.server.datanode.TestDeleteBlockPool 4: 2 0 1 0 |
........
hdfs.server.datanode.TestDeleteBlockPool 11: 2 0 0 0 |
means that this test, out of 12 runs, had an error once, with 0 Failure and 0 Skipped test.