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Date: Mon, 22 Oct 2007 22:59:50 -0700 (PDT)
From: "Andrey Pavlenko (JIRA)" <jira@apache.org>
To: commits@harmony.apache.org
Subject: [jira] Commented: (HARMONY-4989) [classlib][nio]
 FileChannel.tryLock() does not work on Linux
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    [ https://issues.apache.org/jira/browse/HARMONY-4989?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12536912 ] 

Andrey Pavlenko commented on HARMONY-4989:
------------------------------------------

Mark, actually I've extracted the above test case from the functional test functional.org.apache.harmony.test.func.api.java.nio.channels.fileChannel.FileChannelTest which passes on Windows and fails on Linux. As far as I understand the spec for FileChannel.tryLock() the test case is correct. I asked Google and found that Sun also experienced similar issue (http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=5083626) but it looks like they have fixed it in 1.6.0.
 

> [classlib][nio] FileChannel.tryLock() does not work on Linux
> ------------------------------------------------------------
>
>                 Key: HARMONY-4989
>                 URL: https://issues.apache.org/jira/browse/HARMONY-4989
>             Project: Harmony
>          Issue Type: Bug
>          Components: Classlib
>            Reporter: Andrey Pavlenko
>            Assignee: Tim Ellison
>
> The following test fails on SLES10
> import java.io.File;
> import java.io.FileOutputStream;
> import java.io.RandomAccessFile;
> import java.nio.channels.FileChannel;
> import java.nio.channels.OverlappingFileLockException;
> import junit.framework.TestCase;
> public class Test extends TestCase {
>     public void testTryLock() throws Exception {
>         final File f = File.createTempFile("try", "lock");
>         final FileChannel fc1 = new RandomAccessFile(f, "rw").getChannel();
>         final FileChannel fc2 = new RandomAccessFile(f, "rw").getChannel();
>         final FileOutputStream fos = new FileOutputStream(f);
>         
>         f.deleteOnExit();
>         fos.write("Hello".getBytes());
>         fos.flush();
>         fos.close();
>         fc1.lock();
>         try {
>             assertNull(fc2.tryLock());
>         } catch (OverlappingFileLockException ex) {
>             // expected
>         }
>     }
> }

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