We are trying out Neo4j Community Edition 2.3.1. 
We have one thread which periodically loads/updates data into Neo4j using 
LOAD CSV method, and several read requests to the db.
As far as I understand, we use schema indexes 
However, we have been receiving two type of error messages quite frequently 
which point to Lucene indexes:


1) WARNING: The index is in a failed state: 'File not found: 
/home/neo4jsupp/neo4j-community-2.3.1/data/INM_06252016/schema/index/lucene/7/_27.cfs
 
(No such file or directory)'.
 
2)
MATCH (n:VSID) WHERE n.code="ABC" RETURN n;

Node with id 5338
Neo.ClientError.Statement.EntityNotFound

There are no error messages in console.log or messages.log.
We have no choice but to shutdown the db, and perform the ritual of 
removing contents under the lucene folder, and restart the db. 

Q1) Can someone shed light on this behavior of Neo4j? Why and when would 
the lucene index get corrupted?
Q2) Why is there reference to lucene index when we are using schema indexes?
Q3) How can restrict Neo4j from creating lucene indexes?

Thanks in advance.

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