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https://issues.apache.org/jira/browse/SOLR-14630?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17174072#comment-17174072
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Jason Baik commented on SOLR-14630:
-----------------------------------
Attached is a test case demonstrating the problem:
[^0001-SOLR-14630-Test-case-demonstrating-_route_-is-broken.patch].
We're finding the same problem as [~idjurasevic] as we're upgrading from Solr 6
to 7. The _route_ param no longer works as expected. The regression seems to
have happened around L1061 in
[https://github.com/apache/lucene-solr/commit/e001f352895c83652c3cf31e3c724d29a46bb721#diff-c8d54eacd46180b332c86c7ae448abaeR1065].
It made requests no longer be routed to a specific replica, but only to the
node level.
This:
{code:java}
ZkCoreNodeProps.getCoreUrl(nodeProps.getStr(ZkStateReader.BASE_URL_PROP),
joinedInputCollections) {code}
Shouldn't have replaced:
{code:java}
url = coreNodeProps.getCoreUrl() {code}
Although they sound like they do the same thing, they actually don't. Only the
latter produces a replica specific url. I guess the name of the method
getCoreUrl() is little tricky.
> CloudSolrClient doesn't pick correct core when server contains more shards
> --------------------------------------------------------------------------
>
> Key: SOLR-14630
> URL: https://issues.apache.org/jira/browse/SOLR-14630
> Project: Solr
> Issue Type: Bug
> Components: SolrCloud, SolrJ
> Affects Versions: 8.5.1, 8.5.2
> Reporter: Ivan Djurasevic
> Priority: Major
> Attachments:
> 0001-SOLR-14630-Test-case-demonstrating-_route_-is-broken.patch
>
>
> Precondition: create collection with 4 shards on one server.
> During search and update, solr cloud client picks wrong core even _route_
> exists in query param. In BaseSolrClient class, method sendRequest,
>
> {code:java}
> sortedReplicas.forEach( replica -> {
> if (seenNodes.add(replica.getNodeName())) {
> theUrlList.add(ZkCoreNodeProps.getCoreUrl(replica.getBaseUrl(),
> joinedInputCollections));
> }
> });
> {code}
>
> Previous part of code adds base url(localhost:8983/solr/collection_name) to
> theUrlList, it doesn't create core address(localhost:8983/solr/core_name). If
> we change previous code to:
> {quote}
> {code:java}
> sortedReplicas.forEach(replica -> {
> if (seenNodes.add(replica.getNodeName())) {
> theUrlList.add(replica.getCoreUrl());
> }
> });{code}
> {quote}
> Solr cloud client picks core which is defined with _route_ parameter.
>
>
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