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From Jan Høydahl (JIRA) <j...@apache.org>
Subject [jira] [Commented] (SOLR-13502) Investigate using something other than ZooKeeper's "4 letter words" for the admin UI status
Date Thu, 30 May 2019 19:00:00 GMT

    [ https://issues.apache.org/jira/browse/SOLR-13502?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16852246#comment-16852246
] 

Jan Høydahl commented on SOLR-13502:
------------------------------------

For 8.x it is fine with 4lw whitelist. Later we can explore the new AdminServer http://zookeeper.apache.org/doc/r3.5.5/zookeeperAdmin.html#sc_adminserver

> Investigate using something other than ZooKeeper's "4 letter words" for the admin UI
status
> -------------------------------------------------------------------------------------------
>
>                 Key: SOLR-13502
>                 URL: https://issues.apache.org/jira/browse/SOLR-13502
>             Project: Solr
>          Issue Type: Improvement
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Erick Erickson
>            Assignee: Erick Erickson
>            Priority: Major
>
> ZooKeeper 3.5.5 requires a whitelist of allowed "4 letter words". The only place I see
on a quick look at the Solr code where 4lws are used is in the admin UI "ZK Status" link.
> In order to use the admin UI "ZK Status" link, users will have to modify their zoo.cfg
file with
> {code}
> 4lw.commands.whitelist=mntr,conf,ruok
> {code}
> This JIRA is to see if there are alternatives to using 4lw for the admin UI.
> This depends on SOLR-8346. If we find an alternative, we need to remove the additions
to the ref guide that mention changing zoo.cfg (just scan for 4lw in all the .adoc files)
and remove SolrZkServer.ZK_WHITELIST_PROPERTY and all references to it (SolrZkServer and SolrTestCaseJ4).



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