We are receiving an UnsupportedOperationException after making certain requests. The requests themselves do not seem to be causing the issue as when we run the job that makes these requests locally against the same SolrCloud cluster where the errors are being thrown, there are no errors. These errors only occur when we run this job from our remote job server.
In the log snippet are the last few requests made before the error is thrown. This error started happening after we did an upgrade from solr 6.3.0 to Solr 7.2.1. We believe the line causing the issue in Solr's HttpSolrCall.java is /collectionsList.add(collectionName);/ in the getRemotCoreUrl method as collectionsList is immutable (perhaps because it is set to Collections.emptyList() in the resolveCollectionListOrAlias method). We are not completely confident this is a bug in Solr, but are unsure what could be causing this issue on our end. Does anyone have any insights as to what could cause this error? -- Sent from: http://lucene.472066.n3.nabble.com/Solr-User-f472068.html
