Bojan Smid created SOLR-12765:
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Summary: Possibly incorrect format in JMX cache stats
Key: SOLR-12765
URL: https://issues.apache.org/jira/browse/SOLR-12765
Project: Solr
Issue Type: Bug
Security Level: Public (Default Security Level. Issues are Public)
Affects Versions: 7.4
Reporter: Bojan Smid
I posted a question on ML
[https://mail-archives.apache.org/mod_mbox/lucene-solr-user/201809.mbox/%3CCAGniRXR4Ps%3D03X0uiByCn5ecUT2VY4TLV4iNcxCde3dxBnmC-w%40mail.gmail.com%3E|https://mail-archives.apache.org/mod_mbox/lucene-solr-user/201809.mbox/%3CCAGniRXR4Ps%3D03X0uiByCn5ecUT2VY4TLV4iNcxCde3dxBnmC-w%40mail.gmail.com%3E),]
, but didn't get feedback. Since it looks like a possible bug, I am opening a
ticket.
It seems the format of cache mbeans changed with 7.4.0. And from what I see
similar change wasn't made for other mbeans, which may mean it was accidental
and may be a bug.
In Solr 7.3.* format was (each attribute on its own, numeric type):
mbean:
solr:dom1=core,dom2=gettingstarted,dom3=shard1,dom4=replica_n1,category=CACHE,scope=searcher,name=filterCache
attributes:
lookups java.lang.Long = 0
hits java.lang.Long = 0
cumulative_evictions java.lang.Long = 0
size java.lang.Long = 0
hitratio java.lang.Float = 0.0
evictions java.lang.Long = 0
cumulative_lookups java.lang.Long = 0
cumulative_hitratio java.lang.Float = 0.0
warmupTime java.lang.Long = 0
inserts java.lang.Long = 0
cumulative_inserts java.lang.Long = 0
cumulative_hits java.lang.Long = 0
With 7.4.0 there is a single attribute "Value" (java.lang.Object):
mbean:
solr:dom1=core,dom2=gettingstarted,dom3=shard1,dom4=replica_n1,category=CACHE,scope=searcher,name=filterCache
attributes:
Value java.lang.Object = \{lookups=0, evictions=0, cumulative_inserts=0,
cumulative_hits=0, hits=0, cumulative_evictions=0, size=0, hitratio=0.0,
cumulative_lookups=0, cumulative_hitratio=0.0, warmupTime=0, inserts=0}
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