FileSystem.createBulkDelete introduced in Hadoop 3.4.1

[dlmarion]

Could look at bumping Hadoop version from 3.4.0 to 3.4.1 in Accumulo 3.1 branch and changing the GarbageCollector to use this new API.

[ctubbsii]

Currently, we build with 3.4.0 (now that 3.4.1 is out, we'll be bumping to that, since we try to build with the latest). But, we do have a GitHub Actions check to ensure we still are compatible with the oldest one we support. That's currently checking 3.0.3. We can bump the minimum required Hadoop version to 3.4.1 to do this, but it should be well-documented, and once the change is merged forward into the main branch, any cluster testing of the elasticity work would only be able to be done on a 3.4.1 HDFS cluster (which is fine... just something to keep in mind).

[ctubbsii]

The one big downside to bumping to 3.4.1 as the minimum supported version is that it is currently also the latest version. So, that restricts users to only a single possible HDFS version to run for now. That can be a big problem for users if there's any serious bugs in 3.4.1 that users want to avoid. Right now, they can use any version between 3.0.3 and 3.4.1, so it's easy to avoid versions that have bugs that users want to avoid. That wouldn't be the case after this change.