hadoop-common-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Jeff Hammerbacher (JIRA)" <j...@apache.org>
Subject [jira] Reopened: (HADOOP-6339) SequenceFile writer does not properly flush stream with external DataOutputStream
Date Thu, 29 Oct 2009 00:48:59 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-6339?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jeff Hammerbacher reopened HADOOP-6339:
---------------------------------------


> SequenceFile writer does not properly flush stream with external DataOutputStream
> ---------------------------------------------------------------------------------
>
>                 Key: HADOOP-6339
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6339
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: io
>    Affects Versions: 0.20.1
>            Reporter: Jonathan Hsieh
>
> When using the SequenceFile.createWriter(..,FSDataOutputStream, ...) method to create
a Writer, data is not flushed when the encapsulating SequenceFile is closed.
> Example test case skeleton:
> {code}
> public void testWhyFail() throws IOException {
>     // There a was a failure case using :
>     Configuration conf = ... ;
>     Path path = new Path("file:///tmp/testfile");
>     FileSystem hdfs = path.getFileSystem(conf);
>     // writing
>     FSDataOutputStream dos = hdfs.create(path);
>     hdfs.deleteOnExit(path);
>     // it is specifically with this writer.
>     Writer writer = SequenceFile.createWriter(conf, dos,
>         WriteableEventKey.class, WriteableEvent.class,
>         SequenceFile.CompressionType.NONE, new DefaultCodec());
>     Writable value = ...;
>     Writable key = ...;
>     writer.append(key, value);
>     writer.sync();
>     writer.close();
>     // Test fails unless I close the underlying FSDataOutputStream handle with the line
below.
>     //    dos.close(); 
>     
>     // WTF: nothing written by this writer!
>     FileStatus stats = hdfs.getFileStatus(path);
>     assertTrue(stats.getLen() > 0);
>     // it should have written something but it failed.
>   }
> {code}

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.


Mime
View raw message