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https://issues.apache.org/jira/browse/HDFS-13326?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16408857#comment-16408857
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Wei Yan commented on HDFS-13326:
--------------------------------
{quote}-add option updates also.
{quote}
yes, I didn't scroll down to the see detailed implementation...
But one interesting thing here, we cannot "switching a mount entry from
readonly to non-readonly", or "removing a target path from a mount entry".
For readonly, currently it only supports updating from falst to true.
{code:java}
if (readonly) {
existingEntry.setReadOnly(true);
}{code}
For target path, it will always tries to add new target locations.
{code:java}
for (String nsId : nss) {
if (!existingEntry.addDestination(nsId, dest)) {
System.err.println("Cannot add destination at " + nsId + " " + dest);
}
}{code}
> RBF: router webUI's MountTable tab doesn't show "readonly" info
> ---------------------------------------------------------------
>
> Key: HDFS-13326
> URL: https://issues.apache.org/jira/browse/HDFS-13326
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Wei Yan
> Assignee: Wei Yan
> Priority: Minor
>
> So currently in the MountTable tab, the "readonly" field always show empty,
> no matter whether the mount entry is readonly or not. From the code
> perspective, it tries to show:
> {code:java}
> <td class="dfshealth-node-icon dfshealth-mount-read-only-{readonly}"/>{code}
> The federationhealth.html will load hadoop.css, however the hadoop.css
> doesn't have classes with a prefix "dfshealth-mount-read-only".
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