[HADOOP-12656] MiniKdc throws "address in use" BindException

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.8.0, 3.0.0-alpha1

Environment

Jenkins

• Hadoop Flags: Reviewed
• Assignee: Wei-Chiu Chuang
• Reporter: Wei-Chiu Chuang
• Created: 17/Dec/15 21:13
• Updated: 03/May/20 16:09
• Resolved: 19/Dec/15 00:09

Description

Another address in use error.

I saw the test TestKerberosAuthenticationHandler.testNameRules failed due to porting binding error.
https://builds.apache.org/job/Hadoop-common-trunk-Java8/827/testReport/org.apache.hadoop.security.authentication.server/TestKerberosAuthenticationHandler/testNameRules/

Looking at MiniKdc implementation, if port is 0, the constructor use ServerSocket to find an unused port, assign the port number to the member variable port and close the ServerSocket object; later, in initKDCServer(), instantiate a TcpTransport object and bind at that port.

It appears that the port may be used in between, and then throw the exception.

Issue Links

• relates to: SPARK-31631 Fix test flakiness caused by MiniKdc which throws "address in use" BindException