Github user pwendell commented on a diff in the pull request: https://github.com/apache/spark/pull/807#discussion_r13825922 --- Diff: external/flume/src/main/scala/org/apache/spark/streaming/flume/EventTransformer.scala --- @@ -0,0 +1,72 @@ +/* + * 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.streaming.flume + +import java.io.{ObjectOutput, ObjectInput} + +import scala.collection.JavaConversions._ + +import org.apache.spark.util.Utils +import org.apache.spark.Logging + +/** + * A simple object that provides the implementation of readExternal and writeExternal for both + * the wrapper classes for Flume-style Events. + */ +object EventTransformer extends Logging { + def readExternal(in: ObjectInput): (java.util.HashMap[CharSequence, CharSequence], + Array[Byte]) = { + val bodyLength = in.readInt() + val bodyBuff = new Array[Byte](bodyLength) + in.read(bodyBuff) + + val numHeaders = in.readInt() + val headers = new java.util.HashMap[CharSequence, CharSequence] + + for (i <- 0 until numHeaders) { + val keyLength = in.readInt() + val keyBuff = new Array[Byte](keyLength) + in.read(keyBuff) --- End diff -- The existing code does a `readFully` so your code actually introduces a bug here: https://github.com/apache/spark/blob/master/external/flume/src/main/scala/org/apache/spark/streaming/flume/FlumeInputDStream.scala#L74
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