[ 
https://issues.apache.org/jira/browse/SOLR-17638?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Philipp Trulson updated SOLR-17638:
-----------------------------------
    Description: 
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}
 

(Small sidenote: The program errors when not providing --base-url or --zk-host, 
even though the help text says {_}If omitted both the -b parameter and the -z 
parameter, connect to http://localhost:8983/solr{_}. Not sure if it's worth 
opening a separate issue for that, looks like the CLI args are being worked on 
already in 9.9)

  was:
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}


> 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
>            Priority: Major
>
> 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}
>  
> (Small sidenote: The program errors when not providing --base-url or 
> --zk-host, even though the help text says {_}If omitted both the -b parameter 
> and the -z parameter, connect to http://localhost:8983/solr{_}. Not sure if 
> it's worth opening a separate issue for that, looks like the CLI args are 
> being worked on already in 9.9)



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