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From "Dmitriy V. Ryaboy (JIRA)" <j...@apache.org>
Subject [jira] Commented: (PIG-1354) UDFs for dynamic invocation of simple Java methods
Date Tue, 06 Apr 2010 23:34:33 GMT

    [ https://issues.apache.org/jira/browse/PIG-1354?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12854260#action_12854260
] 

Dmitriy V. Ryaboy commented on PIG-1354:
----------------------------------------

Alan, I don't know that there are many methods that operate directly on byte arrays, but it
would be easy to add if someone asks for it.

I will commit this (the test failure seems unrelated, see report below).

{code}
Error Message

Exception in constructor: testAggNoCombine (java.lang.ExceptionInInitializerError  at org.apache.pig.test.TestBuiltin.<init>(TestBuiltin.java:65)
 at 
sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)  at 
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
 at 
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
 at 
java.lang.reflect.Constructor.newInstance(Constructor.java:513)  at junit.framework.TestSuite.createTest(TestSuite.java:61)
 at 
junit.framework.TestSuite.addTestMethod(TestSuite.java:283)  at junit.framework.TestSuite.<init>(TestSuite.java:146)
 at 
org.junit.internal.runners.JUnit38ClassRunner.<init>(JUnit38ClassRunner.java:67)  at
org.junit.internal.builders.JUnit3Builder.runnerForClass(JUnit3Builder.java:14)  at 
org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:57)  at 
org.junit.internal.builders.AllDefaultPossibilitiesBuilder.runnerForClass(AllDefaultPossibilitiesBuilder.java:29)
 at 
org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:57)  at 
org.junit.internal.requests.ClassRequest.getRunner(ClassRequest.java:24)  at junit.framework.JUnit4TestAdapter.<init>(JUnit4TestAdapter.java:31)
 at
junit.framework.JUnit4TestAdapter.<init>(JUnit4TestAdapter.java:24)  at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
Method)  at 
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
 at 
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
 at 
java.lang.reflect.Constructor.newInstance(Constructor.java:513)  at 
org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.run(JUnitTestRunner.java:386)
 at 
org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.launch(JUnitTestRunner.java:911)
 at 
org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.main(JUnitTestRunner.java:768)


Caused by: java.lang.IllegalArgumentException: port out of range:-1  at java.net.InetSocketAddress.<init>(InetSocketAddress.java:118)
 at 
org.apache.hadoop.hdfs.server.namenode.NameNode.startHttpServer(NameNode.java:250)  at 
org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:202)  at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>
(NameNode.java:279)  at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:956)
 at 
org.apache.hadoop.hdfs.MiniDFSCluster.<init>(MiniDFSCluster.java:275)  at org.apache.hadoop.hdfs.MiniDFSCluster.<init>(MiniDFSCluster.java:119)
 
at org.apache.pig.test.MiniCluster.setupMiniDfsAndMrClusters(MiniCluster.java:57)  at org.apache.pig.test.MiniCluster.<init>(MiniCluster.java:47)
 at 
org.apache.pig.test.MiniCluster.<clinit>(MiniCluster.java:44)  ... 23 more )


Stacktrace

junit.framework.AssertionFailedError: Exception in constructor: testAggNoCombine (java.lang.ExceptionInInitializerError
	at org.apache.pig.test.TestBuiltin.<init>(TestBuiltin.java:65)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
Caused by: java.lang.IllegalArgumentException: port out of range:-1
	at java.net.InetSocketAddress.<init>(InetSocketAddress.java:118)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.startHttpServer(NameNode.java:250)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:202)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:279)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:956)
	at org.apache.hadoop.hdfs.MiniDFSCluster.<init>(MiniDFSCluster.java:275)
	at org.apache.hadoop.hdfs.MiniDFSCluster.<init>(MiniDFSCluster.java:119)
	at org.apache.pig.test.MiniCluster.setupMiniDfsAndMrClusters(MiniCluster.java:57)
	at org.apache.pig.test.MiniCluster.<init>(MiniCluster.java:47)
	at org.apache.pig.test.MiniCluster.<clinit>(MiniCluster.java:44)
)
{code}

> UDFs for dynamic invocation of simple Java methods
> --------------------------------------------------
>
>                 Key: PIG-1354
>                 URL: https://issues.apache.org/jira/browse/PIG-1354
>             Project: Pig
>          Issue Type: New Feature
>    Affects Versions: 0.8.0
>            Reporter: Dmitriy V. Ryaboy
>            Assignee: Dmitriy V. Ryaboy
>             Fix For: 0.8.0
>
>         Attachments: PIG-1354.patch, PIG-1354.patch, PIG-1354.patch
>
>
> The need to create wrapper UDFs for simple Java functions creates unnecessary work for
Pig users, slows down the development process, and produces a lot of trivial classes. We can
use Java's reflection to allow invoking a number of methods on the fly, dynamically, by creating
a generic UDF to accomplish this.

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