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https://issues.apache.org/jira/browse/HDFS-16669?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Simbarashe Dzinamarira updated HDFS-16669:
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Description:
The RPCHeader in the client protocol currently contains a single value to
indicate the last seen state ID for a namenode.
{noformat}
optional int64 stateId = 8; // The last seen Global State ID
{noformat}
When there are multiple namenodes, such as in router based federation, the
headers need to carry the state IDs for each of these nameservices that are
part of the federation.
This change is a prerequisite for HDFS-13522: RBF: Support observer node from
Router-Based Federation
was:
The RPCHeader in the client protocol currently contains a single value to
indicate the last seen state ID for a namenode.
{noformat}
optional int64 stateId = 8; // The last seen Global State ID
{noformat}
When there are multiple namenodes, such as in router based federation, the
headers need to carry the state IDs for each of these nameservices that are
part of the federation.
This change is a prerequisite for HDFS-15522: RBF: Support observer node from
Router-Based Federation
> Enhance client protocol to propagate last seen state IDs for multiple
> nameservices.
> -----------------------------------------------------------------------------------
>
> Key: HDFS-16669
> URL: https://issues.apache.org/jira/browse/HDFS-16669
> Project: Hadoop HDFS
> Issue Type: New Feature
> Reporter: Simbarashe Dzinamarira
> Assignee: Simbarashe Dzinamarira
> Priority: Major
> Labels: pull-request-available
> Time Spent: 10m
> Remaining Estimate: 0h
>
> The RPCHeader in the client protocol currently contains a single value to
> indicate the last seen state ID for a namenode.
> {noformat}
> optional int64 stateId = 8; // The last seen Global State ID
> {noformat}
> When there are multiple namenodes, such as in router based federation, the
> headers need to carry the state IDs for each of these nameservices that are
> part of the federation.
> This change is a prerequisite for HDFS-13522: RBF: Support observer node from
> Router-Based Federation
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