启动elasticsearch 失败问题描述：双击elasticsearch.bat闪退。使用命令行运行报如下错误：C:\javatool\elasticsearch-6.4.3\bin>elasticsearch.batUnrecognized VM option 'UseConcMarkSweepGC'Error: Could not create the Java Virtual Ma

对二叉树进行层序遍历二叉树定义lass TreeNode{int val;TreeNode left;TreeNode right;TreeNode(int x) {val = x;}}使用队列进行层序遍历public static void traverse_level(TreeNode root){Queue<TreeNode> queue = new LinkedList<

问题描述zookeeper可以正常启动，但是启动kafka时报下面的错误[2021-04-18 15:26:30,870] INFO [ZooKeeperClient Kafka server] Waiting until connected. (kafka.zookeeper.ZooKeeperClient)[2021-04-18 15:26:30,875] WARN Session 0x0 f

springBoot和elasticsearch版本兼容问题版本兼容查询https://docs.spring.io/spring-data/elasticsearch/docs/4.0.2.RELEASE/reference/html/#preface.versions