[jira] [Closed] (SPARK-18910) Can't use UDF that jar file in hdfs

["Dongjoon Hyun (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-18910?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Dongjoon Hyun closed SPARK-18910.
---------------------------------

> Can't use UDF that jar file in hdfs
> -----------------------------------
>
>                 Key: SPARK-18910
>                 URL: https://issues.apache.org/jira/browse/SPARK-18910
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 2.0.2
>            Reporter: Hong Shen
>            Priority: Major
>
> When I create a UDF that jar file in hdfs, I can't use the UDF. 
> {code}
> spark-sql> create function trans_array as 'com.test.udf.TransArray'  using jar 'hdfs://host1:9000/spark/dev/share/libs/spark-proxy-server-biz-service-impl-1.0.0.jar';
> spark-sql> describe function trans_array;
> Function: test_db.trans_array
> Class: com.alipay.spark.proxy.server.biz.service.impl.udf.TransArray
> Usage: N/A.
> Time taken: 0.127 seconds, Fetched 3 row(s)
> spark-sql> select trans_array(1, '\\|', id, position) as (id0, position0) from test_spark limit 10;
> Error in query: Undefined function: 'trans_array'. This function is neither a registered temporary function nor a permanent function registered in the database 'test_db'.; line 1 pos 7
> {code}
> The reason is when org.apache.spark.sql.internal.SessionState.FunctionResourceLoader.loadResource, the uri.toURL throw exception with " failed unknown protocol: hdfs"
> {code}
>   def addJar(path: String): Unit = {
>     sparkSession.sparkContext.addJar(path)
>     val uri = new Path(path).toUri
>     val jarURL = if (uri.getScheme == null) {
>       // `path` is a local file path without a URL scheme
>       new File(path).toURI.toURL
>     } else {
>       // `path` is a URL with a scheme
>       {color:red}uri.toURL{color}
>     }
>     jarClassLoader.addURL(jarURL)
>     Thread.currentThread().setContextClassLoader(jarClassLoader)
>   }
> {code}
> I think we should setURLStreamHandlerFactory method on URL with an instance of FsUrlStreamHandlerFactory, just like:
> {code}
> static {
> 	URL.setURLStreamHandlerFactory(new FsUrlStreamHandlerFactory());
> }
> {code}



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