[HDFS-17265] RBF: Throwing an exception prevents the permit from being released when using FairnessPolicyController

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.4.0
• Fix Version/s: 3.4.0
• Component/s: rbf
• Labels: pull-request-available
• Target Version/s: 3.4.0
• Hadoop Flags: Reviewed
• Assignee: Jian Zhang
• Reporter: Jian Zhang
• Created: 25/Nov/23 09:10
• Updated: 28/Jan/24 01:11
• Resolved: 08/Dec/23 18:18

Description

Bug description

When the router uses FairnessPolicyController, each time a request is processed,

the permit of the ns corresponding to the request will be obtained first (method acquirePermit),

and then the  information of namenodes corresponding to the ns will be obtained(method getOrderedNamenodes).

getOrderedNamenodes comes after acquirePermit, so if acquirePermit succeeds but getOrderedNamenodes throws an exception, the permit cannot be released.

 

How to reproduce

Use the original code to run the new unit test testReleasedWhenExceptionOccurs in this PR

 

 

Issue Links

• links to: GitHub Pull Request #6298