ella eln created SOLR-17386:
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Summary: it's now impossible to update solrconfig for coordinators
after core creation
Key: SOLR-17386
URL: https://issues.apache.org/jira/browse/SOLR-17386
Project: Solr
Issue Type: Bug
Security Level: Public (Default Security Level. Issues are Public)
Components: SolrCloud
Affects Versions: 9.7
Reporter: ella eln
since solr-17269 the coordinators are not managed by a collection and it's
impossible to update their configuration after core creation. (before the
change, it was possible to reload the synthetic collection, but not anymore...)
I've been working on solr-17385 trying to add a feature to solr's coordinators,
and i'm pretty sure if found a bug
It's relatively easy to recreate: * run 2 solr nodes, one coordinator and one
data.
* create a collection on one the data node and add a coordinator to it by
running a /select request. you can index a document to make it easyer to see
the issue.
* then make a change to your configuration and reload the collection (for
example add a costume fl for testing to /select. I added <str
name="fl">id,test_s:[value v="test2"]</str>)
* then make a few /select requests from the coordinator and see that the
configuration changes are not applied. If you do the same request from the data
node it will work as expected
I'm pretty sure it was added in SOLR-17269, there was an improvement made to
the coordinator query answering flow that inadvertently lead to a state in
which the configuration on the coordinators could never be updated/changed
through reload/requests. This happened because it's not verifying it's
configuration against the zookeeper anymore after the core has been created, it
used to be managed by a synthetic collection but that was removed. But i might
be wrong about that.
It's about to be added to solr 9.7, so I hope to save some time and energy for
everyone involved by reporting this as early as possible
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