[SPARK-9801] Spark streaming deletes the temp file and backup files without checking if they exist or not

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.4.1
• Fix Version/s: 1.3.2, 1.4.2, 1.5.0
• Component/s: DStreams
• Assignee: Hao Zhu
• Reporter: Hao Zhu
• Created: 10/Aug/15 21:47
• Updated: 12/Aug/15 09:48
• Resolved: 11/Aug/15 00:18

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.

Issue Links

• links to: [Github] Pull Request #8082 (viadea)