[HADOOP-7290] Unit test failure in TestUserGroupInformation.testGetServerSideGroups

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.23.0
• Component/s: security
• Labels: test

Environment

Linux 2.6.38-8-generic #42-Ubuntu SMP Mon Apr 11 03:31:24 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux
Java(TM) SE Runtime Environment (build 1.6.0_24-b07)
Java HotSpot(TM) 64-Bit Server VM (build 19.1-b02, mixed mode)

• Hadoop Flags: Reviewed
• Assignee: Trevor Robinson
• Reporter: Trevor Robinson
• Created: 13/May/11 19:39
• Updated: 17/Oct/15 16:40
• Resolved: 13/May/11 20:44

Description

Testsuite: org.apache.hadoop.security.TestUserGroupInformation
Tests run: 14, Failures: 1, Errors: 0, Time elapsed: 0.278 sec
------------- Standard Output ---------------
trobinson:users guest git
------------- ---------------- ---------------

Testcase: testGetServerSideGroups took 0.051 sec
FAILED
expected:<g[ues]t> but was:<g[i]t>
junit.framework.AssertionFailedError: expected:<g[ues]t> but was:<g[i]t>
at org.apache.hadoop.security.TestUserGroupInformation.testGetServerSideGroups(TestUserGroupInformation.java:94)

It seems like the test is assuming that the groups returned by UserGroupInformation.getGroupNames() are in the same order as those returned by executing `id -Gn`. getGroupNames() only documents that the primary group is first, and `man id` doesn't document any ordering, so it seems like the test needs to be reworked to remove that assumption.

Issue Links

• is duplicated by: HADOOP-8802 TestUserGroupInformation testcase fails using IBM JDK 6.0 SR11
• relates to: HADOOP-9375 Port HADOOP-7290 to branch-1 to fix TestUserGroupInformation failure