[HDDS-989] Check Hdds Volumes for errors

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.4.0
• Component/s: Ozone Datanode
• Assignee: Arpit Agarwal
• Reporter: Arpit Agarwal
• Created: 21/Jan/19 22:56
• Updated: 27/Jan/19 19:49
• Resolved: 27/Jan/19 19:19

Description

HDDS volumes should be checked for errors periodically.

This Jira introduces volume checks on Ozone DN startup and periodically (once every 15 minutes by default). The volume checker logic is borrowed from HDFS, although some code duplication is necessary because the HDFS classes are package-private.

This patch just detects the volume failure. Failure handling will be added in HDDS-1008.

Issue Links

• is required by: HDDS-1008 Invalidate closed container replicas on a failed volume
• requires: HDFS-14221 Replace Guava Optional with Java Optional
• requires: HDFS-14222 Make ThrottledAsyncChecker constructor public