Question

帮我解决这个问题我正在通过此代码创建Db

创建数据库

    graphDb = new GraphDatabaseFactory().newEmbeddedDatabase(DB_PATH);
    Transaction tx = graphDb.beginTx();
    try {

        /* creating app node and setting properties of the node */
        app = graphDb.createNode();
        appNodeId = app.getId();
        System.out.println("AppNodeId:::::::::::" + appNodeId);
        app.setProperty("appId", appPojo.getAppId());
        app.setProperty("appName", appPojo.getAppName());
        // app.setProperty("userList", appPojo.getUserList());
        System.out.println(">>>>app_data" + app.getId());

        /* creating user node and setting properties of the node */
        user = graphDb.createNode();
        user.setProperty("userId", userPojo.getUserId());
        user.setProperty("userName", userPojo.getUserName());
        user.setProperty("appId", appPojo.getAppId());
        System.out.println(">>>>user_data" + user.getId());

        /* creating HAS_A relationship between app node and user node */
        relationship = app.createRelationshipTo(user, RelTypes.HAS_A)

    }

    finally {
        System.out.println(">>>>>>>>>Finally");
    }

DB_PATH是我的本地目录

Answer 1

启动数据库时，会创建一个锁定文件。如果没有正确关闭它，则不会删除锁定文件。再次启动时，锁定文件已存在，无法创建，并引发异常。尝试从DB_PATH手动删除锁定文件，并确保下次正确关闭数据库;对于普通情况，您应该显式调用graphDb.shutdown()，对于例外情况，应该有一个关闭钩子。这就是Neo4j示例代码中的关闭钩子的样子

private static void registerShutdownHook( final GraphDatabaseService graphDb ) 
{
   Runtime.getRuntime().addShutdownHook( new Thread()
    {
        @Override
        public void run()
        {
            graphDb.shutdown();
        }
    } );
}

Neo4jServer锁定DB并获取异常org.neo4j.kernel.StoreLockException：无法创建锁定文件

1 个答案: