[IMPALA-5124] Fix BufferPool handling of scratch read errors

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Impala 2.9.0
• Fix Version/s: Impala 2.9.0
• Component/s: Backend
• Target Version: Impala 2.9.0
• Epic Color: ghx-label-7
• Assignee: Tim Armstrong
• Reporter: Tim Armstrong
• Created: 28/Mar/17 16:15
• Updated: 18/Apr/17 15:55
• Resolved: 18/Apr/17 15:55

Description

We are missing test coverage of the BufferPool error path where the integrity check of on-disk data fails. We should add a backend test that injects read errors of the following kinds:

• Truncated files
• Corrupted files
• Inaccessible/removed files

I wrote a prototype of the tests and confirmed that there are some bugs in this area.