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https://issues.apache.org/jira/browse/HDFS-16985?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xiaoqiao He updated HDFS-16985:
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Summary: Fix data missing issue when delete local block file. (was: delete
local block file when FileNotFoundException occurred may lead to missing block.)
> Fix data missing issue when delete local block file.
> ----------------------------------------------------
>
> Key: HDFS-16985
> URL: https://issues.apache.org/jira/browse/HDFS-16985
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode
> Reporter: Chengwei Wang
> Assignee: Chengwei Wang
> Priority: Major
> Labels: pull-request-available
>
> We encounterd several missing-block problem in our production cluster which
> hdfs running on AWS EC2 + EBS.
> The root cause：
> # the block remains only 1 replication left and hasn't been reconstruction
> # DN checks block file existing when BlockSender construction
> # the EBS checking failed and throw FileNotFoundException (EBS may be in
> fault condition)
> # DN invalidateBlock and schedule block async deletion
> # EBS already back to normal when DN do delete block
> # the block file be delete permanently and can't be recovered
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