[HADOOP-12687] SecureUtil#getByName should also try to resolve direct hostname, incase multiple loopback addresses are present in /etc/hosts

• Type: Bug
• Status: Reopened
• Priority: Major
• Resolution: Unresolved
• Labels: security
• Target Version/s: 3.5.0
• Assignee: Sunil G
• Reporter: Junping Du
• Created: 12/Nov/15 17:12
• Updated: 04/Jan/24 11:34

Description

From https://builds.apache.org/job/PreCommit-YARN-Build/9661/artifact/patchprocess/patch-unit-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-client-jdk1.7.0_79.txt, we can see the tests in TestYarnClient, TestAMRMClient and TestNMClient get timeout which can be reproduced locally.

When /etc/hosts has multiple loopback entries, InetAddress.getByName(null) will be returning the first entry present in etc/hosts. Hence its possible that machine hostname can be second in list and cause UnKnownHostException.

Suggesting a direct resolve for such hostname scenarios.

Issue Links

• blocks: HADOOP-12911 Upgrade Hadoop MiniKDC with Kerby
• duplicates: YARN-4306 Test failure: TestClientRMTokens
• duplicates: YARN-4318 Test failure: TestAMAuthorization
• relates to: YARN-4306 Test failure: TestClientRMTokens
• relates to: YARN-4318 Test failure: TestAMAuthorization
• relates to: YARN-4478 [Umbrella] : Track all the Test failures in YARN