Neo4j bolt 驱动程序协议(protocol)错误

Question

我在尝试 neo4j bolt 驱动程序运行简单密码时遇到错误。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"));
        }

    }

}

异常(exception):
线程“主”org.neo4j.driver.v1.exceptions.ClientException 中的异常:协议(protocol)错误，服务器建议意外协议(protocol)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。默认情况下，7474 用于 http，而 7687 是二进制 bolt 协议(protocol)的默认值。