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From "Hairong Kuang (JIRA)" <j...@apache.org>
Subject [jira] Created: (HDFS-609) Create a file with the append flag does not work in HDFS
Date Thu, 10 Sep 2009 00:47:58 GMT
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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