Github user pwendell commented on a diff in the pull request:
https://github.com/apache/spark/pull/42#discussion_r10597551
--- Diff:
core/src/main/scala/org/apache/spark/scheduler/SparkReplayerBus.scala ---
@@ -0,0 +1,98 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.scheduler
+
+import java.io.InputStream
+import java.net.URI
+
+import scala.io.Source
+
+import it.unimi.dsi.fastutil.io.FastBufferedInputStream
+import org.apache.hadoop.fs.{Path, FileSystem}
+import org.json4s.jackson.JsonMethods._
+
+import org.apache.spark.{Logging, SparkConf}
+import org.apache.spark.io.CompressionCodec
+import org.apache.spark.util.{JsonProtocol, Utils}
+
+/**
+ * An EventBus that replays logged events from persisted storage
--- End diff --
Does this get unit tested anywhere? It would be good to have tests that log
events to a file and read them back and make sure everything gets serialized
correctly (actually both logging to a file and just a simpler one that
serializes/deserializes). If you wrote test code to generate randomized events
that could be useful to contribute here.
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