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Posted to hdfs-issues@hadoop.apache.org by "Plamen Jeliazkov (JIRA)" <ji...@apache.org> on 2018/03/05 23:34:00 UTC

[jira] [Updated] (HDFS-12977) Add stateId to RPC headers.

     [ https://issues.apache.org/jira/browse/HDFS-12977?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Plamen Jeliazkov updated HDFS-12977:
------------------------------------
    Attachment: HDFS_12977.trunk.003.patch

> Add stateId to RPC headers.
> ---------------------------
>
>                 Key: HDFS-12977
>                 URL: https://issues.apache.org/jira/browse/HDFS-12977
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: ipc, namenode
>            Reporter: Konstantin Shvachko
>            Assignee: Plamen Jeliazkov
>            Priority: Major
>         Attachments: HDFS_12977.trunk.001.patch, HDFS_12977.trunk.002.patch, HDFS_12977.trunk.003.patch
>
>
> stateId is a new field in the RPC headers of NameNode proto calls.
> stateId is the journal transaction Id, which represents LastSeenId for the clients and LastWrittenId for NameNodes. See more in [reads from Standby design doc|https://issues.apache.org/jira/secure/attachment/12902925/ConsistentReadsFromStandbyNode.pdf].



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