Github user jiangxb1987 commented on a diff in the pull request:
https://github.com/apache/spark/pull/15769#discussion_r87125459
--- Diff:
core/src/main/scala/org/apache/spark/internal/io/SparkHadoopMapReduceWriter.scala
---
@@ -0,0 +1,243 @@
+/*
+ * 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.internal.io
+
+import java.text.SimpleDateFormat
+import java.util.{Date, Locale}
+
+import scala.reflect.ClassTag
+import scala.util.DynamicVariable
+
+import org.apache.hadoop.conf.Configuration
+import org.apache.hadoop.fs.Path
+import org.apache.hadoop.mapred.{JobConf, JobID}
+import org.apache.hadoop.mapreduce._
+import org.apache.hadoop.mapreduce.task.TaskAttemptContextImpl
+
+import org.apache.spark.{SparkConf, SparkException, TaskContext}
+import org.apache.spark.deploy.SparkHadoopUtil
+import org.apache.spark.executor.OutputMetrics
+import org.apache.spark.internal.Logging
+import org.apache.spark.internal.io.FileCommitProtocol.TaskCommitMessage
+import org.apache.spark.rdd.RDD
+import org.apache.spark.util.{SerializableConfiguration, Utils}
+
+/**
+ * A helper object that saves an RDD using a Hadoop OutputFormat
+ * (from the newer mapreduce API, not the old mapred API).
+ */
+private[spark]
+object SparkHadoopMapReduceWriter extends Logging {
+
+ /**
+ * Basic work flow of this command is:
+ * 1. Driver side setup, prepare the data source and hadoop
configuration for the write job to
+ * be issued.
+ * 2. Issues a write job consists of one or more executor side tasks,
each of which writes all
+ * rows within an RDD partition.
+ * 3. If no exception is thrown in a task, commits that task, otherwise
aborts that task; If any
+ * exception is thrown during task commitment, also aborts that task.
+ * 4. If all tasks are committed, commit the job, otherwise aborts the
job; If any exception is
+ * thrown during job commitment, also aborts the job.
+ */
+ def write[K, V: ClassTag](
+ rdd: RDD[(K, V)],
+ hadoopConf: Configuration): Unit = {
+ // Extract context and configuration from RDD.
+ val sparkContext = rdd.context
+ val stageId = rdd.id
+ val sparkConf = rdd.conf
+ val conf = new SerializableConfiguration(hadoopConf)
+
+ // Set up a job.
+ val jobTrackerId = SparkHadoopWriterUtils.createJobTrackerID(new
Date())
+ val jobAttemptId = new TaskAttemptID(jobTrackerId, stageId,
TaskType.MAP, 0, 0)
+ val jobContext = new TaskAttemptContextImpl(conf.value, jobAttemptId)
+ val format = jobContext.getOutputFormatClass
+
+ if (SparkHadoopWriterUtils.isOutputSpecValidationEnabled(sparkConf)) {
+ // FileOutputFormat ignores the filesystem parameter
+ val jobFormat = format.newInstance
--- End diff --
Oh...I see the problem now. Will add that in a follow up, thank you for
clarifying.
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at infrastruct...@apache.org or file a JIRA ticket
with INFRA.
---
---------------------------------------------------------------------
To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org
For additional commands, e-mail: reviews-h...@spark.apache.org
