Question

我在尝试使用neo4j bolt驱动程序运行简单的cypher时遇到错误。知道出了什么问题吗？

    public void boltDriver() {
    Config noSSL = Config.build()
            .withEncryptionLevel(Config.EncryptionLevel.NONE).toConfig();
    Driver driver = GraphDatabase.driver("bolt://localhost:7474",
            AuthTokens.basic("neo4j", "neo4j1"), noSSL); // <password>

    try (Session session = driver.session()) {

        StatementResult result;

        String foafQuery = " MATCH (n) WHERE EXISTS(n.country) RETURN DISTINCT \"node\" as element, n.country AS country ";
        result = session.run(foafQuery, parameters("name", "Joe"));
        while (result.hasNext()) {
            Record next = result.next();
            System.out.println(next.get("element"));
            System.out.println(next.get("country"));
        }

    }

}

例外：线程“main”中的异常org.neo4j.driver.v1.exceptions.ClientException：协议错误，服务器建议的意外协议版本：1213486160 在org.neo4j.driver.internal.connector.socket.SocketClient.negotiateProtocol（SocketClient.java:198）在org.neo4j.driver.internal.connector.socket.SocketClient.start（SocketClient.java:73）在org.neo4j.driver.internal.connector.socket.SocketConnection。（SocketConnection.java:63）在org.neo4j.driver.internal.connector.socket.SocketConnector.connect（SocketConnector.java:52）在org.neo4j.driver.internal.pool.InternalConnectionPool $ 1.allocate（InternalConnectionPool.java:191）在org.neo4j.driver.internal.pool.InternalConnectionPool $ 1.allocate（InternalConnectionPool.java:180）在org.neo4j.driver.internal.pool.ThreadCachingPool.allocate（ThreadCachingPool.java:212）在org.neo4j.driver.internal.pool.ThreadCachingPool.acquireFromGlobal（ThreadCachingPool.java:164）在org.neo4j.driver.internal.pool.ThreadCachingPool.acquire（ThreadCachingPool.java:118）在org.neo4j.driver.internal.pool.InternalConnectionPool.acquire（InternalConnectionPool.java:109）在org.neo4j.driver.internal.InternalDriver.session（InternalDriver.java:53）在Neo4jMain.boldDriver（Neo4jMain.java:55）在Neo4jMain.main（Neo4jMain.java:30）

Answer 1

您使用了错误的端口号。 7474默认用于http，而7687是二进制螺栓协议的默认值。

Answer 2

一个重要的提示是1213486160是“HTTP”作为32位大端数字。

Neo4j螺栓驱动程序协议错误

2 个答案: