Deleting an already deleted empty path should not fail the job

In the final phase of generating dataset, the MR framework calls DatasetKeyOutputFormat.MergeOutputCommitter.commitJob() which would clean the temporary path. In some scenarios that multiple applications are running on different paths but with same namespace, such as:
hdfs://ns/path/dataset1
hdfs://ns/path/dataset2

The cleanlyDelete method [1] could throw a FileNotFoundException while deleting an already cleaned empty path, which fails the whole job:

17/03/19 08:21:21 INFO mapreduce.Job: Job job_1488289274600_188649 failed with state FAILED due to: Job commit failed: org.kitesdk.data.DatasetIOException: Could not cleanly delete path:hdfs://ns/path/.temp/job_1488289274600_188649
at org.kitesdk.data.spi.filesystem.FileSystemUtil.cleanlyDelete(FileSystemUtil.java:239)
at org.kitesdk.data.spi.filesystem.TemporaryFileSystemDatasetRepository.delete(TemporaryFileSystemDatasetRepository.java:61)
at org.kitesdk.data.mapreduce.DatasetKeyOutputFormat$MergeOutputCommitter.commitJob(DatasetKeyOutputFormat.java:395)
at org.apache.hadoop.mapreduce.v2.app.commit.CommitterEventHandler$EventProcessor.handleJobCommit(CommitterEventHandler.java:274)
at org.apache.hadoop.mapreduce.v2.app.commit.CommitterEventHandler$EventProcessor.run(CommitterEventHandler.java:237)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.io.FileNotFoundException: File hdfs://ns/path/.temp does not exist.
at org.apache.hadoop.hdfs.DistributedFileSystem.listStatusInternal(DistributedFileSystem.java:705)
at org.apache.hadoop.hdfs.DistributedFileSystem.access$600(DistributedFileSystem.java:106)
at org.apache.hadoop.hdfs.DistributedFileSystem$15.doCall(DistributedFileSystem.java:763)
at org.apache.hadoop.hdfs.DistributedFileSystem$15.doCall(DistributedFileSystem.java:759)
at org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81)
at org.apache.hadoop.hdfs.DistributedFileSystem.listStatus(DistributedFileSystem.java:759)
at org.kitesdk.data.spi.filesystem.FileSystemUtil.cleanlyDelete(FileSystemUtil.java:226)

Since this method is to remove the empty directories, it should not fail the job when the directories are already being deleted.

[1] https://github.com/kite-sdk/kite/blob/master/kite-data/kite-data-core/src/main/java/org/kitesdk/data/spi/filesystem/FileSystemUtil.java#L241-L242