代码如下 public static void producer1() throws ExecutionException, InterruptedException { Properties props = new Properties(); props.put("bootstrap.servers", "xxx:9092,xxx:9092,xxx:9092"); props.put("zookeeper.connect", "xxx…

在使用flink run命令提交任务可能会遇到如下错误: The program finished with the following exception: org.apache.flink.client.program.ProgramInvocationException: The main method caused an error: java.util.concurrent.ExecutionException: org.apache.flink.runtime.client.JobS…

Exception in thread "main" java.util.regex.PatternSyntaxException: Unclosed character class near index 0 [ ^ 出现此错误应该是字符转义出现问题: System.out.println(str.replaceAll("[", "22")); 解决方案:在[之前加上\\ System.out.println(str.replaceAll(&qu…

使用str.split("[",15)时,出现Exception in thread "main" java.util.regex.PatternSyntaxException: Unclosed character class near index 0 [ ^的问题 解决办法为在[加上\\转义 str.split("\\[",15)   …

我想判断一个集合里面有没有"world"这个元素,如果有,我就添加一个"javaee"元素, 当时的做法是: public class ListIteratorDemo1 { public static void main(String[] args) { // 创建List集合对象 List list = new ArrayList(); // 添加元素 list.add("hello"); list.add("world"…

本文为博主原创,未经允许不得转载: 被坑了好长时间的bug,差点就要重新配置环境,重新下载,重新开始的境遇.在此记录一下: 首先展示一下报错的异常: -Apr- ::] org.apache.catalina.core.ContainerBase.startInternal A child container failed during start java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleExce…

二月 20, 2017 11:30:28 上午 org.apache.tomcat.util.digester.SetPropertiesRule begin警告: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:xiaozao_web' did not find a matching property.二月 20, 2…

遇到下面这个问题 程序包 javax.servlet 不存在 或者 java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Tomcat].StandardHost[localhost].StandardContext[]] at java.util.concurrent.FutureTask.report(…

自己写了个最简单的springMVC项目练练手,没有用maven,在WebContent中新建了lib文件夹,将jar包复制到这里面,然后add to build path到项目里. 启动Tomcat,报错,启动不起来.在网页中运行localhost:8080发现Tomcat页面是可以打开的. 报错内容如下: 严重: A child container failed during start java.util.concurrent.ExecutionException: org.apache.…

今天开发犯了一个特lowB的错,记录下来,引以为戒! 严重: A child container failed during start java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/UpLoadE…