[HDFS-15795] EC: Wrong checksum when reconstruction was failed by exception

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.3.1, 3.4.0, 3.1.5, 3.2.3
• Component/s: datanode, ec, erasure-coding
• Labels: pull-request-available
• Assignee: Yushi Hayasaka
• Reporter: Yushi Hayasaka
• Created: 28/Jan/21 03:56
• Updated: 03/Feb/21 01:35
• Resolved: 02/Feb/21 10:58

Description

If the reconstruction task is failed on StripedBlockChecksumReconstructor by exception, the checksum becomes wrong one because it is calculated with blocks except a failure one.
It is caused by catching exception with not appropriate way. As a result, the failed block is not fetched again.

Issue Links

• links to: GitHub Pull Request #2657