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From "Eli Collins (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HDFS-609) Create a file with the append flag does not work in HDFS
Date Fri, 30 Apr 2010 17:52:55 GMT

    [ https://issues.apache.org/jira/browse/HDFS-609?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12862771#action_12862771

Eli Collins commented on HDFS-609:

Thanks for the clarification Todd. I was looking at the FileSystem#append APIs looks like
those didn't get removed when they were merged with create and apparently create with append
was checked in without a test?

> Create a file with the append flag does not work in HDFS
> --------------------------------------------------------
>                 Key: HDFS-609
>                 URL: https://issues.apache.org/jira/browse/HDFS-609
>             Project: Hadoop HDFS
>          Issue Type: Bug
>    Affects Versions: 0.21.0
>            Reporter: Hairong Kuang
>            Priority: Blocker
>             Fix For: 0.21.0
> HADOOP-5438 introduced a create API with flags. There are a couple of issues when the
flag is set to be APPEND.
> 1. The APPEND flag does not work in HDFS. Append is not as simple as changing a FileINode
to be a FileINodeUnderConstruction. It also need to reopen the last block for applend if last
block is not full and handle crc when the last crc chunk is not full.
> 2. The API is not well thought. It has parameters like replication factor and blockSize.
Those parameters do not make any sense if APPEND flag is set. But they give an application
user a wrong impression that append could change a file's block size and replication factor.

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