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https://issues.apache.org/jira/browse/HDFS-11915?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kihwal Lee updated HDFS-11915:
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Description:
As discussed in HDFS-5042, there is a chance to lose blocks on power failure if
rbw file creation entry is not yet sync to device. Then the block created is
nowhere exists on disk. Neither in rbw nor in finalized.
As suggested by [~kihwal], will discuss and track it in this JIRA.
As suggested by [~vinayrpet], May be first hsync() request on block file can
call fsync on its parent directory (rbw) directory.
was:
As discussed in HDFS-5042, there is a chance to loose blocks on power failure
if rbw file creation entry is not yet sync to device. Then the block created is
nowhere exists on disk. Neither in rbw nor in finalized.
As suggested by [~kihwal], will discuss and track it in this JIRA.
As suggested by [~vinayrpet], May be first hsync() request on block file can
call fsync on its parent directory (rbw) directory.
> Sync rbw dir on the first hsync() to avoid file lost on power failure
> ---------------------------------------------------------------------
>
> Key: HDFS-11915
> URL: https://issues.apache.org/jira/browse/HDFS-11915
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Kanaka Kumar Avvaru
> Assignee: Vinayakumar B
> Priority: Critical
> Attachments: HDFS-11915-01.patch
>
>
> As discussed in HDFS-5042, there is a chance to lose blocks on power failure
> if rbw file creation entry is not yet sync to device. Then the block created
> is nowhere exists on disk. Neither in rbw nor in finalized.
> As suggested by [~kihwal], will discuss and track it in this JIRA.
> As suggested by [~vinayrpet], May be first hsync() request on block file can
> call fsync on its parent directory (rbw) directory.
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