We have a number of collections in a Solrcloud. The cloud has 2 shards each with 2 replicas, 4 nodes. On one of the nodes I am seeing a lot of errors in the log like this: 2019-02-04 20:27:11.831 ERROR (qtp1595212853-88527) [c:sial-catalog-product s:shard1 r:core_node4 x:sial-catalog-product_shard1_replica2] o.a.s.s.HttpSolrCall null:org.apache.solr.common.SolrException: Error reading document with docId 417762 2019-02-04 20:29:49.779 ERROR (qtp1595212853-87296) [c:sial-catalog-product s:shard1 r:core_node4 x:sial-catalog-product_shard1_replica2] o.a.s.s.HttpSolrCall null:org.apache.solr.common.SolrException: Error reading document with docId 417676 2019-02-04 20:23:47.505 ERROR (qtp1595212853-87538) [c:sial-catalog-product s:shard1 r:core_node4 x:sial-catalog-product_shard1_replica2] o.a.s.s.HttpSolrCall null:org.apache.solr.common.SolrException: Error reading document with docId 414871
There are many more than these three. What does this mean? On the same node I also see problems with 2 other collections: ehs-catalog-qmdoc_shard1_replica2: org.apache.solr.common.SolrException:org.apache.solr.common.SolrException: Error opening new searcher sial-catalog-category-180721_shard2_replica_n4: org.apache.solr.common.SolrException:org.apache.solr.common.SolrException: Error opening new searcher Yet another replica on this node is down What could cause the error reading docId problems? Why is there a problem opening a new searcher on 2 unrelated collections which just happen to be on the same node? How do I go about diagnosing the problems? We've been seeing a lot of problems with solrcloud. We are on Solr 7.2
