Hi,
while upgrading to solr 10 I observed those warning messages in the
container log:
2026-03-24 08:59:54.879 WARN (qtp69329761-33-null-71) [ x:mycore
t:null-71] i.o.s.m.SdkObservableInstrument
CallbackRegistration{instrumentDescriptors=[InstrumentDescriptor{name=s
olr_core_indexsearcher_cache_ops, description=Number of cumulative
cache operations (inserts and evictions), unit=,
type=OBSERVABLE_COUNTER, valueType=LONG,
advice=Advice{explicitBucketBoundaries=null, attributes=null}},
InstrumentDescriptor{name=solr_core_indexsearcher_cache_ram_used,
description=RAM bytes used by cache, unit=By, type=OBSERVABLE_GAUGE,
valueType=LONG, advice=Advice{explicitBucketBoundaries=null,
attributes=null}},
InstrumentDescriptor{name=solr_core_indexsearcher_cache_lookups,
description=Number of cumulative cache lookup results (hits and
misses), unit=, type=OBSERVABLE_COUNTER, valueType=LONG,
advice=Advice{explicitBucketBoundaries=null, attributes=null}},
InstrumentDescriptor{name=solr_core_indexsearcher_cache_size,
description=Current number cache entries, unit=, type=OBSERVABLE_GAUGE,
valueType=LONG, advice=Advice{explicitBucketBoundaries=null,
attributes=null}},
InstrumentDescriptor{name=solr_core_indexsearcher_cache_warmup_time,
description=Cache warmup time (most recent), unit=ms,
type=OBSERVABLE_GAUGE, valueType=LONG,
advice=Advice{explicitBucketBoundaries=null, attributes=null}}]} has
called close() multiple times.
and multiple more of those.
Anything particular I am doing wrong here? I am just deleting and
adding documents to the index like done in 9.x, nothing special.
Anyone an idea?
kind regards
Torsten
