有关于Exception in thread “main” java.util.ConcurrentModificationException当使用迭代器去遍历集合时出现Exception in thread “main” java.util.ConcurrentModificationException错误代码

有关于Exception in thread “main” java.util.ConcurrentModificationException当使用迭代器去遍历集合时出现Exception in thread “main” java.util.ConcurrentModificationException错误代码

springboot连接redis报错org.springframework.data.redis.RedisConnectionFailureException: Unable to connect to Redis; nested exception is io.lettuce.core.RedisConnectionException: Unable to connect to 192.16

1.错误描述org.springframework.data.redis.RedisSystemException: Error in execution; nested exception is io.lettuce.core.RedisCommandExecutionException: READONLY You can’t write against a read only slave.2.

Ubuntu启动zookeeperError: JAVA_HOME is not set and java could not be found in PATH.ZooKeeper启动时报错场景报错信息报错信息很明显说是我jdk路径没有设置，但是通过查询我Ubuntu虚拟机的jdk环境是正常的，信息如下安装的jdk版本信息Java环境的配置信息通过查看之后，验证之后java环境是正常的，因为启动Z