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

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