[HBASE-20280] Fix possibility of deadlocking in refreshFileConnections when prefetch is enabled

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.0-beta-2, 1.4.2
• Fix Version/s: 1.4.4, 2.0.0
• Component/s: BucketCache
• Hadoop Flags: Reviewed
• Assignee: Zach York
• Reporter: Zach York
• Created: 24/Mar/18 06:31
• Updated: 01/Feb/19 20:04
• Resolved: 11/Apr/18 20:33

Description

When prefetch on open is specified, there is a deadlocking case
where if the prefetch is cancelled, the PrefetchExecutor interrupts
the threads if necessary, when that happens in FileIOEngine, it
causes an ClosedByInterruptException which is a subclass of
ClosedChannelException. If we retry all ClosedChannelExceptions,
this will lock as this access is expected to be interrupted.
This change removes calling refreshFileConnections for
ClosedByInterruptExceptions.

Issue Links

• links to: Review Board (master)