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https://issues.apache.org/jira/browse/HDFS-12329?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16144976#comment-16144976
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Weiwei Yang commented on HDFS-12329:
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Hi [~msingh]
The patch makes sense to me, I have 2 questions and if I can get them clear I
will +1 on this patch,
1. In MiniOzoneCluster the patch added a method {{waitDatanodeOzoneReady}} to
check if a datanode is in RUNNING state. I am wondering why this cannot be done
via {{waitOzoneReady}}. Because SCMNodeManager should manage the states of all
DNs, if they are rebooted, SCM should be aware and keep number of healthy nodes
updated.
2. As you mentioned in HDFS-12354 this patch fixed the UT failure in TestKeys,
I am wondering what was the problem and how that is fixed in this patch.
Thanks
> Ozone: Ratis: Readonly calls in XceiverClientRatis should use sendReadOnly
> --------------------------------------------------------------------------
>
> Key: HDFS-12329
> URL: https://issues.apache.org/jira/browse/HDFS-12329
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: ozone
> Affects Versions: HDFS-7240
> Reporter: Mukul Kumar Singh
> Assignee: Mukul Kumar Singh
> Fix For: HDFS-7240
>
> Attachments: HDFS-12329-HDFS-7240.001.patch,
> HDFS-12329-HDFS-7240.002.patch
>
>
> Currently both write and readonly calls in Ratis use RaftClient.send which
> enqueues the the request to the raft log and is processed later when the log
> entry is consumed.
> Readonly call can be optimized by using RaftClient.sendReadOnly which will
> directly query the RaftServer for a particular request.
> This jira will be used to discuss this issue.
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