[SOLR-16997] OTEL configurator NPE when SOLR_HOST not set - ASF JIRA

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Details

Type: Bug
Status: Closed
Priority: Major
Resolution: Fixed
Affects Version/s: None
Fix Version/s: 9.4
Component/s: tracing
Labels:
None

Description

If you start Solr 9.3 with OTEL tracing enabled, but do not set SOLR_HOST, solr will not come up due to it trying to read sysprop "host" which is null and Map.of() requires non-null key and value.

Simple workaround is to set SOLR_HOST but for dev environment it would be nice to fix the bug by checking before setting the "host.name" trace-property.

at java.base/java.util.Objects.requireNonNull(Unknown Source)
java.lang.NullPointerException: null
at java.util.Objects.requireNonNull(Unknown Source) ~[?:?]
at java.util.ImmutableCollections$Map1.<init>(Unknown Source) ~[?:?]
at java.util.Map.of(Unknown Source) ~[?:?]
at org.apache.solr.opentelemetry.OtelTracerConfigurator.getTracer(OtelTracerConfigurator.java:50) ~[?:?]