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[SPARK-24552][core] Use unique id instead of attempt number for writes [branch-2.2]. #21616

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[SPARK-24552][core] Use unique id instead of attempt number for writes [branch-2.2]. #21616

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[SPARK-24552][core] Use unique id instead of attempt number for write…
Jun 22, 2018
ab2f701
Typo.
Jun 22, 2018
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6 changes: 5 additions & 1 deletion core/src/main/scala/org/apache/spark/internal/io/SparkHadoopMapReduceWriter.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -86,12 +86,16 @@ object SparkHadoopMapReduceWriter extends Logging {
// Try to write all RDD partitions as a Hadoop OutputFormat.
try {
val ret = sparkContext.runJob(rdd, (context: TaskContext, iter: Iterator[(K, V)]) => {
// SPARK-24552: Generate a unique "attempt ID" based on the stage and task attempt numbers.
// Assumes that there won't be more than Short.MaxValue attempts, at least not concurrently.
val attemptId = (context.stageAttemptNumber << 16) | context.attemptNumber

executeTask(
context = context,
jobTrackerId = jobTrackerId,
commitJobId = commitJobId,
sparkPartitionId = context.partitionId,
sparkAttemptNumber = context.attemptNumber,
sparkAttemptNumber = attemptId,
committer = committer,
hadoopConf = conf.value,
outputFormat = format.asInstanceOf[Class[OutputFormat[K, V]]],
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