Minor Description
For spark streaming, when checkpoint is happening, it is getting below error message from spark driver log:
15/07/29 11:04:50 INFO CheckpointWriter: Saving checkpoint for time 1438135490000 ms to file 'maprfs:/user/mapr/spark-checkpoint2/checkpoint-1438135490000' 15/07/29 11:04:50 ERROR MapRFileSystem: Failed to delete path maprfs:/user/mapr/spark-checkpoint2/temp, error: No such file or directory (2) 15/07/29 11:04:50 ERROR MapRFileSystem: Failed to delete path maprfs:/user/mapr/spark-checkpoint2/checkpoint-1438135490000.bk, error: No such file or directory (2) 15/07/29 11:04:50 INFO CheckpointWriter: Deleting maprfs:///user/mapr/spark-checkpoint2/checkpoint-1438135480000 15/07/29 11:04:50 INFO CheckpointWriter: Checkpoint for time 1438135490000 ms saved to file 'maprfs:/user/mapr/spark-checkpoint2/checkpoint-1438135490000', took 8729 bytes and 14 ms 15/07/29 11:04:50 INFO DStreamGraph: Clearing checkpoint data for time 1438135490000 ms 15/07/29 11:04:50 INFO DStreamGraph: Cleared checkpoint data for time 1438135490000 ms
From the source code :
https://github.com/apache/spark/blob/master/streaming/src/main/scala/org/apache/spark/streaming/Checkpoint.scala
When Spark tries to delete the 2 files, it did not check if the 2 files exist or not.
fs.delete(tempFile, true) // just in case it exists
fs.delete(backupFile, true) // just in case it exists
We should add the logic to check if the files exist or not before deleting.
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