org.neo4j.driver.v1.exceptions.ClientException: Unable to read MSG_RUN message. Error was: Wrong type received. Expected STRING, received: NULL (0xff).
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Try adding some code so it checks if node was already created or change the CREATE for a MERGE in neo4j code
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org.neo4j.driver.v1.exceptions.ClientException: Unable to read MSG_RUN message. Error was: Wrong type received. Expected STRING, received: NULL (0xff).
at org.neo4j.driver.internal.connector.socket.SocketResponseHandler.handleFailureMessage(SocketResponseHandler.java:68)
at org.neo4j.driver.internal.messaging.PackStreamMessageFormatV1$Reader.unpackFailureMessage(PackStreamMessageFormatV1.java:456)
at org.neo4j.driver.internal.messaging.PackStreamMessageFormatV1$Reader.read(PackStreamMessageFormatV1.java:417)
at org.neo4j.driver.internal.connector.socket.SocketClient.receiveOne(SocketClient.java:130)
at org.neo4j.driver.internal.connector.socket.SocketConnection.receiveOne(SocketConnection.java:135)
at org.neo4j.driver.internal.connector.ConcurrencyGuardingConnection.receiveOne(ConcurrencyGuardingConnection.java:150)
at org.neo4j.driver.internal.pool.PooledConnection.receiveOne(PooledConnection.java:170)
at org.neo4j.driver.internal.InternalStatementResult.tryFetchNext(InternalStatementResult.java:303)
at org.neo4j.driver.internal.InternalStatementResult.hasNext(InternalStatementResult.java:181)
at org.neo4j.spark.Executor$.execute(Neo4j.scala:363)
at org.neo4j.spark.Neo4jRDD.compute(Neo4j.scala:408)
at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:319)
at org.apache.spark.rdd.RDD.iterator(RDD.scala:283)
at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:70)
at org.apache.spark.scheduler.Task.run(Task.scala:85)
at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:274)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)