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From "Erick Erickson (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SOLR-13502) Investigate using something other than ZooKeeper's "4 letter words" for the admin UI status
Date Thu, 30 May 2019 16:13:00 GMT
Erick Erickson created SOLR-13502:
-------------------------------------

             Summary: 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


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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