[HADOOP-18807] Close child file systems in ViewFileSystem when cache is disabled.

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.3.6
• Fix Version/s: 3.4.0, 3.3.9
• Component/s: fs
• Labels: pull-request-available
• Target Version/s: 3.4.0
• Hadoop Flags: Reviewed
• Assignee: Shuyan Zhang
• Reporter: Shuyan Zhang
• Created: 16/Jul/23 15:04
• Updated: 21/Jan/24 02:35
• Resolved: 21/Jul/23 11:30

Description

When the cache is configured to disabled (namely, `fs.viewfs.enable.inner.cache=false` and `fs.*.impl.disable.cache=true`), even if `FileSystem.close()` is called, the client cannot truly close the child file systems in a ViewFileSystem. This caused our long-running clients to constantly produce resource leaks.

Issue Links

• links to: GitHub Pull Request #5847
• links to: GitHub Pull Request #5865