[
https://issues.apache.org/jira/browse/HDFS-4942?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Suresh Srinivas updated HDFS-4942:
----------------------------------
Description:
In current HA mechanism with FailoverProxyProvider and non HA setups with
RetryProxy retry a request from the RPC layer. If the retried request has
already been processed at the namenode, the subsequent attempts fail for
non-idempotent operations such as create, append, delete, rename etc. This
will cause application failures during HA failover, network issues etc.
This jira proposes adding retry cache at the namenode to handle these failures.
More details in the comments.
was:
In current HA mechanism with FailoverProxyProvider and non HA setups with
RetryProxy retry a request from the RPC layer. If the retried request has
already been processed at the namenode, the subsequent attempts fail for
idempotent operations such as create, append, delete, rename etc. This will
cause application failures during HA failover, network issues etc.
This jira proposes adding retry cache at the namenode to handle these failures.
More details in the comments.
> Add retry cache support in Namenode
> -----------------------------------
>
> Key: HDFS-4942
> URL: https://issues.apache.org/jira/browse/HDFS-4942
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: ha, namenode
> Reporter: Suresh Srinivas
> Assignee: Suresh Srinivas
>
> In current HA mechanism with FailoverProxyProvider and non HA setups with
> RetryProxy retry a request from the RPC layer. If the retried request has
> already been processed at the namenode, the subsequent attempts fail for
> non-idempotent operations such as create, append, delete, rename etc. This
> will cause application failures during HA failover, network issues etc.
> This jira proposes adding retry cache at the namenode to handle these
> failures. More details in the comments.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira
