Philipp Trulson created SOLR-17638:
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Summary: Some CLI errors not logged when starting prometheus
exporter
Key: SOLR-17638
URL: https://issues.apache.org/jira/browse/SOLR-17638
Project: Solr
Issue Type: Bug
Components: contrib - prometheus-exporter
Affects Versions: 9.8
Reporter: Philipp Trulson
Hey everyone, we are currently upgrading our 8.11 setup to 9.8 and right now
I'm working on the prometheus-exporter.
To my surprise, the program was exiting directly without any output at all,
which was very frustrating. Only after manually putting a log4j2 config in the
classpath the culprit was finally visible:
{noformat}
org.apache.commons.cli.UnrecognizedOptionException: Unrecognized option:
--zkhost{noformat}
So the program was exiting because the cli option was renamed from zkhost to
zk-host, would have been an easy fix normally, _if_ the program would have told
me. What's funny though is that other messages are being logged to the console
and I can't find the difference atm. My guess is that something got messed up
after switching the cli lib in SOLR-16996.
Reproduction:
{code:java}
$ podman run --rm -it --entrypoint bash solr:9.8.0
/opt/solr/prometheus-exporter/bin/solr-exporter --port=9854
ERROR - 2025-01-30 08:52:53.052;
org.apache.solr.prometheus.exporter.SolrExporter; Must provide either
--base-url or --zk-host
Exception in thread "main" java.lang.NullPointerException: Cannot invoke
"org.apache.solr.prometheus.exporter.SolrScrapeConfiguration.getType()" because
"configuration" is null
at
org.apache.solr.prometheus.exporter.SolrExporter.createScraper(SolrExporter.java:127)
at
org.apache.solr.prometheus.exporter.SolrExporter.<init>(SolrExporter.java:90)
at
org.apache.solr.prometheus.exporter.SolrExporter.main(SolrExporter.java:426)
$ podman run --rm -it --entrypoint bash solr:9.8.0
/opt/solr/prometheus-exporter/bin/solr-exporter --zkhost=lalala
-> no output{code}
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