[SOLR-14835] Solr 8.6.x log starts with "XmlConfiguration Ignored arg" warning from Jetty

• Type: Bug
• Status: Closed
• Priority: Trivial
• Resolution: Not A Problem
• Affects Version/s: 8.6.2
• Fix Version/s: 8.6.3
• Assignee: Andrzej Bialecki
• Reporter: Colvin Cowie
• Created: 06/Sep/20 18:25
• Updated: 08/Aug/23 11:52
• Resolved: 01/Oct/20 08:48

Description

After moving to 8.6.2 the first lines of the solr.log are

2020-09-06 18:19:09.164 INFO  (main) [   ] o.e.j.u.log Logging initialized @1197ms to org.eclipse.jetty.util.log.Slf4jLog
2020-09-06 18:19:09.226 WARN  (main) [   ] o.e.j.u.l.o.e.j.x.XmlConfiguration Ignored arg: <Arg name="threadpool">
    <New id="threadpool" class="com.codahale.metrics.jetty9.InstrumentedQueuedThreadPool"><Arg name="registry">
        <Call id="solrJettyMetricRegistry" name="getOrCreate" class="com.codahale.metrics.SharedMetricRegistries"><Arg>solr.jetty</Arg></Call>
      </Arg></New>
  </Arg>

This config is declared here: https://github.com/apache/lucene-solr/blob/5154b6008f54c9d096f5efe9ae347492c23dd780/solr/server/etc/jetty.xml#L33 and has been there for a long time, so I assume it's the bump in Jetty version that's causing it now.

I'm seeing this in 8.6.2, but I've not gone back to check other versions

Issue Links

• is duplicated by: SOLR-14891 Upgrade Jetty to 9.4.28+ to fix Startup Warning
• is fixed by: SOLR-14844 Upgrade Jetty to 9.4.32.v20200930