Adding a new replica won’t do you much good. Since there’s no leader, it won’t (well, shouldn’t) sync the index.
Did you try the collections API FORCELEADER? It was put in as a last resort for this kind of situation. Best, Erick > On Feb 13, 2020, at 3:22 PM, tedsolr <tsm...@sciquest.com> wrote: > > Solr 5.5.4. I have a collection with a single shard and two replicas. Both > are reporting down. No shard leader exists. Each replica is on a different > node. Should it be safe to attempt an ADDREPLICA command? Since there's no > leader I don't know if that will work. This is the cluster state for the > collection: > > "SCHN":{ > "shards":{"shard1":{ > "range":"80000000-7fffffff", > "state":"active", > "replicas":{ > "core_node6":{ > "core":"SCHN_shard1_replica5", > "base_url":"http://----:8983/solr", > "node_name":"----:8983_solr", > "state":"down"}, > "core_node5":{ > "core":"SCHN_shard1_replica2", > "base_url":"http://----8983/solr", > "node_name":"----:8983_solr", > "state":"down"}}}}, > "replicationFactor":"2", > "router":{"name":"compositeId"}, > "maxShardsPerNode":"1", > "autoAddReplicas":"false", > "znodeVersion":1127, > "configName":"default"}, > > The logs show repeated errors for: ERROR > org.apache.solr.common.SolrException Error while trying to recover. > core=SCHN_shard1_replica5:org.apache.solr.common.SolrException: No > registered leader was found after waiting for 4000ms , collection: SCHN > slice: shard1 > > I've already tried bringing the nodes down and then back up. > > > > -- > Sent from: https://lucene.472066.n3.nabble.com/Solr-User-f472068.html