[jira] [Created] (SOLR-6837) Inconsistent replicas when update is succesful against leader partitioned from all replicas

["Shalin Shekhar Mangar (JIRA)" <ji...@apache.org>]

Shalin Shekhar Mangar created SOLR-6837:
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             Summary: Inconsistent replicas when update is succesful against leader partitioned from all replicas
                 Key: SOLR-6837
                 URL: https://issues.apache.org/jira/browse/SOLR-6837
             Project: Solr
          Issue Type: Bug
          Components: SolrCloud
    Affects Versions: 4.10.2
            Reporter: Shalin Shekhar Mangar


Refer to the following question on solr-user:
https://www.marshut.net/kttiuz/inconsistent-doc-value-across-two-nodes-very-simple-test-what-s-the-expected-behavior.html

{quote}
Config
Solr 4.7.2 / Jetty. 
SoldCloud on two nodes, and  3 ZK, all running in localhost. 
single collection: single shard with two replicas.

Reproducing:
start node1 9.148.58.114:8983
start node2 9.148.58.114:8984
Cluster state: node1 leader. node2 active.

index value 'A' (id="change me").
query and expect 'A' -> success

Stop node2
Cluster state: node1 leader. node2 gone.
query and expect 'A' -> success

Update document value from 'A'->'B'
query and expect 'B' -> success

Stop node1
then
Start node2.
Cluster state: node1 gone. node2 down.

    104510 [coreZkRegister-1-thread-1] INFO  org.apache.solr.cloud.ShardLeaderElectionContext Waiting until we see more replicas up for shard shard1: total=2 found=1 timeoutin=5.27665925E14ms

wait 3m.

    184679 [coreZkRegister-1-thread-1] INFO  org.apache.solr.cloud.ShardLeaderElectionContext  I am the new leader: http://9.148.58.114:8984/solr/quick-results-collection_shard1_replica2/ shard1    
Cluster state: node1 gone. node2 leader.

query and expect 'A' (old value) -> success

start node1
Cluster state: node1 actove. node2 leader.

Inconsistency: 
    Querying node1 always returns 'B'. http://localhost:8983/solr/quick-results-collection_shard1_replica1/select?q=*%3A*&wt=json&indent=true
    Querying node1 always returns 'A'. http://localhost:8984/solr/quick-results-collection_shard1_replica2/select?q=*%3A*&wt=json&indent=true
{quote}

In such a case, the final steady state of the system has inconsistent replicas.



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