Jing Zhao created HDFS-7943:
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Summary: Append cannot handle the last block with length greater
than the preferred block size
Key: HDFS-7943
URL: https://issues.apache.org/jira/browse/HDFS-7943
Project: Hadoop HDFS
Issue Type: Bug
Affects Versions: 2.7.0
Reporter: Jing Zhao
Assignee: Jing Zhao
Priority: Blocker
In HDFS-3689, we remove the restriction from concat that all the source files
should have the same preferred block size with the target file. This can cause
a file to contain blocks with size larger than its preferred block size.
If such block happens to be the last block of a file, and later we append data
to the file without the {{CreateFlag.NEW_BLOCK}} flag (i.e., appending data to
the last block), looks like the current client code will keep writing to the
last block and never allocate a new block.
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