Hello,
I have a solrcloud setup with multiple Collections based on the same
configset.
One of the features I have is that the user can define their own synonyms
in order to improve their search experience which has worked fine until
recently.
Lately the platform has grown and the user has several dozen Collections,
must of them with 200k or more documents of non-trivial size.
The problem is that when the user changes the synonyms, it automatically
triggers a sequential reload of all the Collections. This is now always
causing problems, to a point where the platform becomes unstable and may
need a restart of Solr, which means we have to access the platform and
manually stabilize it.
The synonyms are only used at query time, so there is no need to reindex
anything and it seems like overkill to reload the Collections to change the
synonyms.
I have tried creating my own CustomSynonymGraphFilter and have it call
the loadSynonyms()
method as needed but this causes some weird behavior where queries
sometimes have the newly added synonyms working fine but sometimes not. I
get the impression that there may be like N "threads" handling the queries
but I only change the SynonymMap for one of them, so when the query hits
the right "thread" it works, but in most cases it does not.
My custom fieldType looks like this:
<fieldType name="text_general" class="solr.TextField"
positionIncrementGap="100">
<analyzer type="index">
<tokenizer class="solr.StandardTokenizerFactory"/>
<filter class="solr.StopFilterFactory" ignoreCase="true"
words="stopwords.txt" />
<filter class="solr.ASCIIFoldingFilterFactory"/>
<filter class="solr.LowerCaseFilterFactory"/>
</analyzer>
<analyzer type="query">
<tokenizer class="solr.StandardTokenizerFactory"/>
<filter class="solr.StopFilterFactory" ignoreCase="true"
words="stopwords.txt" />
<filter class="solr.ASCIIFoldingFilterFactory"/>
<filter class="
*com.example.solr.synonyms.QueryTimeSynonymFilterFactory*" />
<filter class="solr.LowerCaseFilterFactory"/>
</analyzer>
</fieldType>
I would like to know if there is some other class I can redefine to make
sure the new SynonymMap is used in all cases.
Thanks,
Simón
PS: I have upgraded to Solr 7.6.
