manuzhang commented on a change in pull request #26339:
[SPARK-27194][SPARK-29302][SQL] Fix the issue that for dynamic partition
overwrite a task would conflict with its speculative task
URL: https://github.com/apache/spark/pull/26339#discussion_r407850970
##########
File path:
core/src/main/scala/org/apache/spark/internal/io/HadoopMapReduceCommitProtocol.scala
##########
@@ -236,13 +267,25 @@ class HadoopMapReduceCommitProtocol(
committer.setupTask(taskContext)
addedAbsPathFiles = mutable.Map[String, String]()
partitionPaths = mutable.Set[String]()
+ dynamicStagingTaskFiles = mutable.Set[Path]()
}
override def commitTask(taskContext: TaskAttemptContext): TaskCommitMessage
= {
val attemptId = taskContext.getTaskAttemptID
logTrace(s"Commit task ${attemptId}")
SparkHadoopMapRedUtil.commitTask(
committer, taskContext, attemptId.getJobID.getId,
attemptId.getTaskID.getId)
+ if (dynamicPartitionOverwrite) {
+ val fs = stagingDir.getFileSystem(taskContext.getConfiguration)
+ dynamicStagingTaskFiles.foreach { stagingTaskFile =>
+ val fileName = stagingTaskFile.getName
+ val partitionPath = getDynamicPartitionPath(stagingTaskFile,
taskContext)
+ val finalFile = new Path(partitionPath, fileName)
+ if (!fs.exists(finalFile) && !fs.rename(stagingTaskFile, finalFile)) {
Review comment:
I think `outputCommitCoordination` still avoids two attempts committing at
the same time through driver.
> It is possible, because there may be several dynamicStagingTaskFiles，if
the task aborted when commitTask, partial outputs are moved to the partition
paths.
I mean what will happen if `rename` fails.
----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
For queries about this service, please contact Infrastructure at:
[email protected]
With regards,
Apache Git Services
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
