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https://issues.apache.org/jira/browse/SOLR-17386?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17869575#comment-17869575
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ella eln commented on SOLR-17386:
---------------------------------
Reloading each coordinator core individually is not possible as well. When
running a reload directly the request fails:
http://localhost:8983/solr/admin/cores?core=.sys.COORDINATOR-COLL-_default_core&action=reload
and it failed returning:
{
"responseHeader":{
"status":500,
"QTime":792
},
"error":{
"metadata":["error-class","org.apache.solr.common.SolrException","root-error-class","org.apache.solr.common.SolrException"],
"msg":"Unable to reload core [.sys.COORDINATOR-COLL-_default_core]",
"trace":"org.apache.solr.common.SolrException: Unable to reload core
[.sys.COORDINATOR-COLL-_default_core]\r\n\tat
org.apache.solr.core.CoreContainer.reload(CoreContainer.java:2101)\r\n\tat
...
org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1149)\r\n\tat
java.base/java.lang.Thread.run(Thread.java:840)\r\nCaused by:
org.apache.solr.common.SolrException: Failed to load config name for
collection:.sys.COORDINATOR-COLL-_default_core due to: \r\n\tat
org.apache.solr.core.SolrCore.<init>(SolrCore.java:1225)\r\n\tat
org.apache.solr.core.SolrCore.reload(SolrCore.java:787)\r\n\tat
org.apache.solr.core.CoreContainer.reload(CoreContainer.java:2053)\r\n\t... 59
more\r\nCaused by: org.apache.solr.common.SolrException: Failed to load config
name for collection:.sys.COORDINATOR-COLL-_default_core due to: \r\n\tat
org.apache.solr.rest.ManagedResourceStorage.newStorageIO(ManagedResourceStorage.java:104)\r\n\tat
org.apache.solr.core.SolrCore.initRestManager(SolrCore.java:3230)\r\n\tat
org.apache.solr.core.SolrCore.<init>(SolrCore.java:1176)\r\n\t... 61
more\r\nCaused by: org.apache.solr.common.SolrException: Could not find
collection : .sys.COORDINATOR-COLL-_default_core\r\n\tat
org.apache.solr.common.cloud.ClusterState.getCollection(ClusterState.java:125)\r\n\tat
org.apache.solr.rest.ManagedResourceStorage.newStorageIO(ManagedResourceStorage.java:101)\r\n\t...
63 more\r\n",
"code":500
}
}
> 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
> Priority: Major
>
> 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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