[IMPALA-9907] NullPointerException in ParallelFileMetadataLoader's load() method

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: Impala 4.0.0
• Epic Color: ghx-label-12
• Assignee: Zoltán Borók-Nagy
• Reporter: Zoltán Borók-Nagy
• Created: 29/Jun/20 15:21
• Updated: 01/Jul/20 09:04
• Resolved: 01/Jul/20 09:04

Description

ParallelFileMetadataLoader.loaders_ became a Map, but at one place we still treat it as a List:

LOG.error(logPrefix_ + " encountered an error loading data for path " + loaders_.get(i).getPartDir(), e);

'i' is an integer, while the loaders_'s key type is Path.

Unfortunately the code compiles which means we get a NullPointerException for this statement.