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author | Josh Rosen <joshrosen@databricks.com> | 2015-03-25 17:40:00 -0700 |
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committer | Andrew Or <andrew@databricks.com> | 2015-03-25 17:40:00 -0700 |
commit | d44a3362ed8cf3068f8ff233e13851a39da42219 (patch) | |
tree | 632629fcc93cdc599f4fbc302e0420b08d06146a /core/src | |
parent | 4fc4d0369e8240defe0ee83252426402f1a28a36 (diff) | |
download | spark-d44a3362ed8cf3068f8ff233e13851a39da42219.tar.gz spark-d44a3362ed8cf3068f8ff233e13851a39da42219.tar.bz2 spark-d44a3362ed8cf3068f8ff233e13851a39da42219.zip |
[SPARK-6079] Use index to speed up StatusTracker.getJobIdsForGroup()
`StatusTracker.getJobIdsForGroup()` is implemented via a linear scan over a HashMap rather than using an index, which might be an expensive operation if there are many (e.g. thousands) of retained jobs.
This patch adds a new map to `JobProgressListener` in order to speed up these lookups.
Author: Josh Rosen <joshrosen@databricks.com>
Closes #4830 from JoshRosen/statustracker-job-group-indexing and squashes the following commits:
e39c5c7 [Josh Rosen] Address review feedback
6709fb2 [Josh Rosen] Merge remote-tracking branch 'origin/master' into statustracker-job-group-indexing
2c49614 [Josh Rosen] getOrElse
97275a7 [Josh Rosen] Add jobGroup to jobId index to JobProgressListener
Diffstat (limited to 'core/src')
3 files changed, 51 insertions, 6 deletions
diff --git a/core/src/main/scala/org/apache/spark/SparkStatusTracker.scala b/core/src/main/scala/org/apache/spark/SparkStatusTracker.scala index edbdda8a0b..34ee3a48f8 100644 --- a/core/src/main/scala/org/apache/spark/SparkStatusTracker.scala +++ b/core/src/main/scala/org/apache/spark/SparkStatusTracker.scala @@ -45,8 +45,7 @@ class SparkStatusTracker private[spark] (sc: SparkContext) { */ def getJobIdsForGroup(jobGroup: String): Array[Int] = { jobProgressListener.synchronized { - val jobData = jobProgressListener.jobIdToData.valuesIterator - jobData.filter(_.jobGroup.orNull == jobGroup).map(_.jobId).toArray + jobProgressListener.jobGroupToJobIds.getOrElse(jobGroup, Seq.empty).toArray } } diff --git a/core/src/main/scala/org/apache/spark/ui/jobs/JobProgressListener.scala b/core/src/main/scala/org/apache/spark/ui/jobs/JobProgressListener.scala index 949e80d30f..625596885f 100644 --- a/core/src/main/scala/org/apache/spark/ui/jobs/JobProgressListener.scala +++ b/core/src/main/scala/org/apache/spark/ui/jobs/JobProgressListener.scala @@ -44,6 +44,7 @@ class JobProgressListener(conf: SparkConf) extends SparkListener with Logging { // These type aliases are public because they're used in the types of public fields: type JobId = Int + type JobGroupId = String type StageId = Int type StageAttemptId = Int type PoolName = String @@ -54,6 +55,7 @@ class JobProgressListener(conf: SparkConf) extends SparkListener with Logging { val completedJobs = ListBuffer[JobUIData]() val failedJobs = ListBuffer[JobUIData]() val jobIdToData = new HashMap[JobId, JobUIData] + val jobGroupToJobIds = new HashMap[JobGroupId, HashSet[JobId]] // Stages: val pendingStages = new HashMap[StageId, StageInfo] @@ -119,7 +121,10 @@ class JobProgressListener(conf: SparkConf) extends SparkListener with Logging { Map( "jobIdToData" -> jobIdToData.size, "stageIdToData" -> stageIdToData.size, - "stageIdToStageInfo" -> stageIdToInfo.size + "stageIdToStageInfo" -> stageIdToInfo.size, + "jobGroupToJobIds" -> jobGroupToJobIds.values.map(_.size).sum, + // Since jobGroupToJobIds is map of sets, check that we don't leak keys with empty values: + "jobGroupToJobIds keySet" -> jobGroupToJobIds.keys.size ) } @@ -140,7 +145,19 @@ class JobProgressListener(conf: SparkConf) extends SparkListener with Logging { if (jobs.size > retainedJobs) { val toRemove = math.max(retainedJobs / 10, 1) jobs.take(toRemove).foreach { job => - jobIdToData.remove(job.jobId) + // Remove the job's UI data, if it exists + jobIdToData.remove(job.jobId).foreach { removedJob => + // A null jobGroupId is used for jobs that are run without a job group + val jobGroupId = removedJob.jobGroup.orNull + // Remove the job group -> job mapping entry, if it exists + jobGroupToJobIds.get(jobGroupId).foreach { jobsInGroup => + jobsInGroup.remove(job.jobId) + // If this was the last job in this job group, remove the map entry for the job group + if (jobsInGroup.isEmpty) { + jobGroupToJobIds.remove(jobGroupId) + } + } + } } jobs.trimStart(toRemove) } @@ -158,6 +175,8 @@ class JobProgressListener(conf: SparkConf) extends SparkListener with Logging { stageIds = jobStart.stageIds, jobGroup = jobGroup, status = JobExecutionStatus.RUNNING) + // A null jobGroupId is used for jobs that are run without a job group + jobGroupToJobIds.getOrElseUpdate(jobGroup.orNull, new HashSet[JobId]).add(jobStart.jobId) jobStart.stageInfos.foreach(x => pendingStages(x.stageId) = x) // Compute (a potential underestimate of) the number of tasks that will be run by this job. // This may be an underestimate because the job start event references all of the result diff --git a/core/src/test/scala/org/apache/spark/ui/jobs/JobProgressListenerSuite.scala b/core/src/test/scala/org/apache/spark/ui/jobs/JobProgressListenerSuite.scala index 730a4b54f5..c0c28cb60e 100644 --- a/core/src/test/scala/org/apache/spark/ui/jobs/JobProgressListenerSuite.scala +++ b/core/src/test/scala/org/apache/spark/ui/jobs/JobProgressListenerSuite.scala @@ -17,6 +17,8 @@ package org.apache.spark.ui.jobs +import java.util.Properties + import org.scalatest.FunSuite import org.scalatest.Matchers @@ -44,11 +46,19 @@ class JobProgressListenerSuite extends FunSuite with LocalSparkContext with Matc SparkListenerStageCompleted(stageInfo) } - private def createJobStartEvent(jobId: Int, stageIds: Seq[Int]) = { + private def createJobStartEvent( + jobId: Int, + stageIds: Seq[Int], + jobGroup: Option[String] = None): SparkListenerJobStart = { val stageInfos = stageIds.map { stageId => new StageInfo(stageId, 0, stageId.toString, 0, null, "") } - SparkListenerJobStart(jobId, jobSubmissionTime, stageInfos) + val properties: Option[Properties] = jobGroup.map { groupId => + val props = new Properties() + props.setProperty(SparkContext.SPARK_JOB_GROUP_ID, groupId) + props + } + SparkListenerJobStart(jobId, jobSubmissionTime, stageInfos, properties.orNull) } private def createJobEndEvent(jobId: Int, failed: Boolean = false) = { @@ -110,6 +120,23 @@ class JobProgressListenerSuite extends FunSuite with LocalSparkContext with Matc listener.stageIdToActiveJobIds.size should be (0) } + test("test clearing of jobGroupToJobIds") { + val conf = new SparkConf() + conf.set("spark.ui.retainedJobs", 5.toString) + val listener = new JobProgressListener(conf) + + // Run 50 jobs, each with one stage + for (jobId <- 0 to 50) { + listener.onJobStart(createJobStartEvent(jobId, Seq(0), jobGroup = Some(jobId.toString))) + listener.onStageSubmitted(createStageStartEvent(0)) + listener.onStageCompleted(createStageEndEvent(0, failed = false)) + listener.onJobEnd(createJobEndEvent(jobId, false)) + } + assertActiveJobsStateIsEmpty(listener) + // This collection won't become empty, but it should be bounded by spark.ui.retainedJobs + listener.jobGroupToJobIds.size should be (5) + } + test("test LRU eviction of jobs") { val conf = new SparkConf() conf.set("spark.ui.retainedStages", 5.toString) |