NullPointerException at org.neo4j.driver.internal.InternalSession$2.run when an invalid Cypher query is executed

[luanne]

With 1.0.0-M05, this exception is thrown

Exception in thread "main" java.lang.NullPointerException
    at org.neo4j.driver.internal.InternalSession$2.run(InternalSession.java:140)
    at org.neo4j.driver.internal.pool.PooledConnection.onDelegateException(PooledConnection.java:197)
    at org.neo4j.driver.internal.pool.PooledConnection.receiveOne(PooledConnection.java:146)
    at org.neo4j.driver.internal.InternalStatementResult.tryFetching(InternalStatementResult.java:344)
    at org.neo4j.driver.internal.InternalStatementResult.hasNext(InternalStatementResult.java:190)

when you attempt to execute an invalid Cypher query using session.run. This only happens when a previous transaction has been carried out in the same session.

Session session = driver.session();

//Must have a transaction first
Transaction tx = session.beginTransaction();
StatementResult result = tx.run("CREATE (n) RETURN n");
if (result.hasNext()) {
    result.next();
}
result.consume();
tx.success();
tx.close();

//Now the bad query
StatementResult badResult = session.run("CREAT (n) RETURN n");
if (badResult.hasNext()) {
    badResult.next();
}

Without the previous tx, badResult is executed and produces
Exception in thread "main" org.neo4j.driver.v1.exceptions.ClientException: Invalid input ' ': expected 'e/E' (line 1, column 6 (offset: 5)) as expected.

If badResult was a valid query badResult = session.run("CREATE (n) RETURN n"); then both execute fine.

[zhenlineo]

Thanks for this feedback. I will have a look at it and come back to you. It seems a bug to me now.

[luanne]

Thank you!