HADOOP-14239. S3A Retry Multiple S3 Key Deletion #208
                
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Hi @steveloughran @liuml07
Sorry for sending may requests.
I explained the problem here https://issues.apache.org/jira/browse/HADOOP-14239
This pull requests recursively retries to delete only S3 keys that are previously failed to delete during the multiple object deletion because aws-java-sdk retry does not help. If it still fails, it will fall back to the single deletion.