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Posted to issues@spark.apache.org by "Hyukjin Kwon (JIRA)" <ji...@apache.org> on 2019/05/21 04:20:12 UTC
[jira] [Updated] (SPARK-17467) Spark SQL: Return incorrect result
for the data files on Swift
[ https://issues.apache.org/jira/browse/SPARK-17467?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Hyukjin Kwon updated SPARK-17467:
---------------------------------
Labels: bulk-closed (was: )
> Spark SQL: Return incorrect result for the data files on Swift
> --------------------------------------------------------------
>
> Key: SPARK-17467
> URL: https://issues.apache.org/jira/browse/SPARK-17467
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 1.6.2
> Reporter: Kevin Huang
> Priority: Major
> Labels: bulk-closed
> Attachments: awclassic.zip.001, awclassic.zip.002, awclassic.zip.003
>
>
> I have an AVRO file on Swift(awclassic.avro). I ran Spark SQL to count its records, but got incorrect result. The file has 60855 records, but I got 42451.
> The following is the sample code I used:
> {code:java}
> public class SparkTest {
>
> public static void main(String[] args) throws InterruptedException, IOException {
> SparkConf sparkConf = new SparkConf()
> .setAppName("Spark-Swift-App")
> .setMaster("local[8]");
> JavaSparkContext sparkContext = new JavaSparkContext(sparkConf);
> Configuration hadoopConf = sparkContext.hadoopConfiguration();
> Configuration extraHadoopConf = new Configuration(false);
> extraHadoopConf.addResource("swift-site.xml"); // swift-site.xml is a customized file which is to store Swift configurations.
> hadoopConf.addResource(extraHadoopConf);
> SQLContext sqlContext = new SQLContext(sparkContext);
> DataFrame df = sqlContext.read().format("com.databricks.spark.avro").load("swift://<container>.<provider>/awclassic/awclassic.avro");
> df.registerTempTable("awclassic");
> DataFrame result = sqlContext.sql("SELECT COUNT(*) FROM awclassic");
> result.show();
> }
> }
> {code}
> I also found an interesting thing: if I changed the value of fs.swift.blocksize, I got different results. For details, please see the following table.
> ||fs.swift.blocksize ||SELECT COUNT\(*\) FROM awclassic ||
> |16384(16M) | 51683|
> |32768(32M) - default | 42451|
> |65536(64M) | 30459|
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