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From "LiXin Ge (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-13086) Add a field about exception type to BlockOpResponseProto
Date Tue, 06 Feb 2018 02:49:00 GMT

     [ https://issues.apache.org/jira/browse/HDFS-13086?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

LiXin Ge updated HDFS-13086:
    Attachment: HDFS-13086.002.patch

> Add a field about exception type to BlockOpResponseProto
> --------------------------------------------------------
>                 Key: HDFS-13086
>                 URL: https://issues.apache.org/jira/browse/HDFS-13086
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>    Affects Versions: 3.1.0
>            Reporter: LiXin Ge
>            Assignee: LiXin Ge
>            Priority: Minor
>         Attachments: HDFS-13086.001.patch, HDFS-13086.002.patch
> When user re-read a file in the way of short-circuit reads, it may come across unknown
errors due to the reasons that the file has been appended after the first read which changes
it's meta file, or the file has been moved away by the balancer.
> Such unknown errors will unnecessary disable short-circuit reads for 10 minutes. HDFS-12528 Make
the {{expireAfterWrite}} of {{DomainSocketFactory$pathMap}} configurable to give user
a choice of never disable the domain socket. 
> We can go a step further that add a field about exception type to BlockOpResponseProto,
so that we can Ignore the acceptable FNFE and set a appropriate disable time to handle the
unacceptable exceptions when different type of exception happens in the same cluster.

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