FYI, We're getting ready for a patch to merge the current S3Guard branch, HADOOP-13345, via a patch https://issues.apache.org/jira/browse/HADOOP-13998
After that's done, we do plan to have a second iteration, work on a 0-rename committer (HADOOP-13786) with all the other tuning and improvements; We'd add a new uber-JIRA & move stuff over, maybe branch, and/or do things patch-by-patch . Anyway, now is a great time for people to download and play https://github.com/apache/hadoop/blob/HADOOP-13345/hadoop-tools/hadoop-aws/src/site/markdown/tools/hadoop-aws/s3guard.md testing this https://github.com/apache/hadoop/blob/HADOOP-13345/hadoop-tools/hadoop-aws/src/site/markdown/tools/hadoop-aws/testing.md The Inconsistent AWS Client is also something everyone is free to use for injecting inconsistencies (and soon faults) into their own apps by way of 2-3 config options. Want to know how your code handles S3A being observably inconsistent? We'll let you do that. -Steve