Spark saveastextfile file already exists It does not overwrite it. In data processing jobs, the output directory plays a crucial role as it stores the resulting data of computations. 最简单的解决方法是在保存数据之前，手动删除目标文件。 The correct answer to this question is that saveAsTextFile does not allow you to name the actual file. apache. saveAsTextFile(path, compressionCodecClass=None) Save this RDD as a text file, using string representations of elements. setAppName("saveAsTextFile") . saveAsTextFile does not provide an option to manually overwrite existing files. As airportsNameAndCityNames is an RDD, there's no opportunity you can overwrite mode. 0 failed 4 times, most Sep 4, 2021 · From documents, saveAsTextFile function is defined as: RDD. If the pyspark. Try Teams for free Explore Teams May 2, 2017 · This is how it should work. textFileStream("/root/file/test") file. copyMerge函数，实现了将标题行插入每个分区文件开头的功能，并提供了代码示例和提交作业的方法。 Mar 22, 2023 · SRC 主要就是2个实现类TextOutputFormat和SequenceOutputFormat spark的rdd的saveAsTextFile()方法底层默认调的其实也是TextOutputFormat，这有2个问题： 1是无法指定文件名（这个其实不是问题，因为逻辑上只需要指定目录名即可，分布式的情况下一个文件肯定要分成多个部分，给每个部分指定名称无意义） 2是无法满足 pyspark. saveAsTextFile似乎不起作用，但是重复会抛出FileAlreadyExistsException Mar 31, 2020 · 文章浏览阅读782次。这篇博客介绍了如何在使用Spark保存CSV文件时，在数据行前添加标题行。通过自定义Hadoop的FileUtil. Dec 11, 2021 · You have run your application twice, and the output directory out has already file named airports_in_usa. rdd. dir property to some other location Sep 27, 2020 · RDD. setAp Aug 24, 2015 · 问 rdd. saveAsTextFile (path: str, compressionCodecClass: Optional [str] = None) → None [source] ¶ Save this RDD as a text file, using string representations of elements. So I searched for a solution to this and I found that a possible way to make it work could be deleting the file through the HDFS API before trying to save the new one. path to text file. I added the Code: Apr 5, 2016 · You need to assign number of threads to spark while running master on local, most obvious choice is 2, 1 to recieve the data and 1 to process them. RDD. Of course, it is no longer suggested to use RDD directly any more in Spark. Mar 5, 2018 · I consistently get an IOException: File already exists: org. How to overwrite files added using SparkContext. Apr 5, 2016 · You have a handy method bundled with Spark "foreachRDD": val file = ssc. Nov 12, 2020 · 本文介绍Spark中多种保存操作，包括saveAsTextFile、saveAsSequenceFile等，覆盖文本、序列及对象文件保存方式，并详解如何利用不同API将数据存入HDFS及HBase。 import org. compressionCodecClass str, optional saveAsTextFile is really processed by Spark executors. You can change the path to the temp folder for each Spark application by spark. setMaster("local"). Try Teams for free Explore Teams 解决文件已存在异常的方法. If you look at the method definition for saveAsTextFile you can see that it expects a path: public void saveAsTextFile(String path) Within the path you specify it will create a part file for each partition in your data. 我是spark的新手，正在尝试了解每个转换是如何工作的。在本例中，我尝试使用Spark中的saveAsTextFile函数，但它似乎显示了 下面是我当前的代码： import findsparkfindspark. The directory does not exist before running this script. setMaster("local[*]"). Try Teams for free Explore Teams Mar 28, 2018 · How to name file when saveAsTextFile in spark? 1. Mar 17, 2017 · I could run 'Runner' without errors in local mode; so the code itself is probably is not an issue. addFile() when the target file exists and its contents do not match those of the source. Mar 27, 2024 · Spark Write DataFrame into Single CSV File (merge multiple part files) Spark Streaming – Different Output modes explained; Spark Word Count Explained with Example; Spark createOrReplaceTempView() Explained; Spark Save a File without a Directory; Spark – Rename and Delete a File or Directory From HDFS\ What is Apache Spark and Why It Is Jan 3, 2025 · While a counts. spark. foreachRDD(t=> {var test=t. Depending on your Spark setup, Spark executors may run as a different user than your Spark application driver. saveAsTextFiles("/root/file/file1")}) sc. Spark (PySpark) File Already Exists Exception. Sep 14, 2023 · Yes, in Apache Spark, when you use the saveAsTextFile action to save an RDD or DataFrame to a specified directory, Spark will create the output directory if it does not already exist. 1k次。当使用Spark的saveAsTextFile方法保存数据到已存在的目录时，会遇到异常。解决办法是使用RDDMultipleTextOutputFormat类，注释掉检查输出目录的部分，并重写文件命名规则以避免覆盖已有文件。 Aug 24, 2015 · Ask questions, find answers and collaborate at work with Stack Overflow for Teams. val conf: SparkConf = new SparkConf(). Spark will create files within that directory. Mar 19, 2020 · If the path already exists, spark will raise exception even before generating _temporary files, that can be handled by save. stop() Mar 17, 2017 · Below the piece of code where the `saveAsTextFile` is executed. It indicates the format of the partition data files stored within that directory. addFile? 2. overwrite says this: "Whether to overwrite files added through SparkContext. saveAsTextFile (path: str, compressionCodecClass: Optional [str] = None) → None¶ Save this RDD as a text file, using string representations of elements. Sep 17, 2019 · 文章浏览阅读2. In this article, we shall discuss in detail Jun 26, 2024 · Ask questions, find answers and collaborate at work with Stack Overflow for Teams. SparkException: Job aborted due to stage failure: Task 15 in stage 55. You use should DataFrame as much as possible. Can you paste the exception stack (and possibly options) which causes this to surface ? Maybe your problem is somewhere else in the code that fails and that's why the temporary files, and you have some retry mechanism that tries to run the code again and then fails because the directory already exists with the previous try and the left overs? Aug 11, 2024 · Apache Spark is a powerful open-source distributed computing system that provides an easy-to-use platform for large-scale data processing. def main(args: Array[String]): Unit = { . RDD import org. init()from pyspark import SparkConf, SparkContextconf = SparkConf(). What I tried. Why is this FileAlreadyExistsException being raised? Jun 18, 2021 · 第二天一早，放弃昨天的无脑尝试，改改思路：之前的报错信息都是通过livy执行返回的，虽然明确指明了是FileAlreadyExistsException错误，可是根据昨天将近一天的尝试，可以判断应该不是报错信息字面义：文件已存在导致无法写入的问题。 Nov 20, 2014 · The documentation for the parameter spark. However Spark's saveAsTextFile() does not work if the file already exists. mode('overwrite'). The reason for this is that the data is partitioned and within the path given as a parameter to the call to saveAsTextFile(), it will treat that as a directory and then write one file per partition. 我们可以采取以下几种方法来解决文件已存在的异常： 1. 2. I guess the spark application driver prepares the directory for the job fine, but then the executors running as a different user have no rights to write in that directory. Dec 29, 2022 · 文章浏览阅读458次。如果在 Spark 中使用 saveAsTextFile() 方法将 RDD 保存到本地文件系统或 Hadoop 分布式文件系统 (HDFS) 时，如果文件已经存在，则会抛出 FileAlreadyExistsException 异常。为了解决这个问题，您可以使用 overwrite 参数来强制 Spark 覆盖现有文件。 Feb 7, 2017 · Ask questions, find answers and collaborate at work with Stack Overflow for Teams. 删除目标文件. map() //DO the map stuff here test. {SparkConf, SparkContext} . Parameters path str. Parameters path str: **path to text file** compressionCodecClass str, optional Apr 25, 2024 · Spark saveAsTextFile() is one of the methods that write the content into one or more text files (part files). . You don't specify a file name, just a path. saveAsTextFile¶ RDD. txt directory name may look odd at first glance, it is good practice for two reasons:. To avoid the issue, you have to manually remove the existing file before writing to them. " So it has no effect on saveAsTextFiles method. text. local. files. llhqtbp xjtm ginqfo rgjz pvalhg womdrs nhpf cbrryk mzwqfcc okn kwovd ygishy zso mmaswhiu qmcz