Github user mxm commented on a diff in the pull request: https://github.com/apache/flink/pull/344#discussion_r24093420 --- Diff: flink-runtime/src/main/scala/org/apache/flink/runtime/jobmanager/MemoryArchivist.scala --- @@ -25,48 +25,82 @@ import org.apache.flink.runtime.jobgraph.JobID import org.apache.flink.runtime.messages.ArchiveMessages._ import org.apache.flink.runtime.messages.JobManagerMessages._ +import scala.collection.mutable.LinkedHashMap +import scala.ref.SoftReference + class MemoryArchivist(private val max_entries: Int) extends Actor with ActorLogMessages with ActorLogging { /** * Map of execution graphs belonging to recently started jobs with the time stamp of the last - * received job event. + * received job event. The insert order is preserved through a LinkedHashMap. */ - val graphs = collection.mutable.HashMap[JobID, ExecutionGraph]() - val lru = collection.mutable.Queue[JobID]() + val graphs = LinkedHashMap[JobID, SoftReference[ExecutionGraph]]() override def receiveWithLogMessages: Receive = { + /* Receive Execution Graph to archive */ case ArchiveExecutionGraph(jobID, graph) => { - graphs.update(jobID, graph) + // wrap graph inside a soft reference + graphs.update(jobID, new SoftReference(graph)) + + // clear all execution edges of the graph + val iter = graph.getAllExecutionVertices().iterator() + while (iter.hasNext) { + iter.next().clearExecutionEdges() + } + cleanup(jobID) } case RequestArchivedJobs => { - sender ! ArchivedJobs(graphs.values) + sender ! ArchivedJobs(getAllGraphs()) } case RequestJob(jobID) => { - graphs.get(jobID) match { - case Some(graph) => sender ! JobFound(jobID, graph) - case None => sender ! JobNotFound(jobID) + getGraph(jobID) match { --- End diff -- Nice read. I'll try to avoid null the next time.
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