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https://issues.apache.org/jira/browse/HDFS-609?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12872727#action_12872727
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Tom White commented on HDFS-609:
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So are we saying that append doesn't work when calling create() with the append
flag, but it works when calling append()? For the 0.21 release we could either
fix this (any volunteers?) or throw an unsupported exception for create with
the append flag.
> 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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