no servers hosting shard: shard2

[Yogesh Chaudhari]

Hi All,

Currently we are using Solr 5.2.1 on production server and want upgrade to Solr 
7.7.2.  We are using solr 5.2.1 from last 5 years, we do have millions of 
documents on production server. We have Solr cloud with 2 shards and 3 replicas 
on production server.

I have upgraded Solr 5.2.1 to Solr 6.6.6 , it is upgraded successfully on my 
local machine.

Now I am trying to upgrading Solr 6.6.6 to Solr 7.7.2. I have upgraded all 6 
solr instances one at a time to Solr 7.7.2. I am getting below error. One shard 
(with 3 replicas) is upgraded successfully bu =t the another shard is giving an 
error (please refer below image).  Though one shard is upgraded, I can not do 
anything with that. I think issue is due to old indexes or documents.


[cid:image001.png@01D5E1E2.3BA81F70]

org.apache.solr.common.SolrException: no servers hosting shard: shard2
            at 
org.apache.solr.handler.component.HttpShardHandler.prepDistributed(HttpShardHandler.java:463)
            at 
org.apache.solr.handler.component.SearchHandler.getAndPrepShardHandler(SearchHandler.java:226)
            at 
org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:267)
            at 
org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:199)
            at org.apache.solr.core.SolrCore.execute(SolrCore.java:2551)
            at 
org.apache.solr.servlet.HttpSolrCall.execute(HttpSolrCall.java:711)
            at org.apache.solr.servlet.HttpSolrCall.call(HttpSolrCall.java:516)


Thanks,

Yogesh Chaudhari