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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