最近使用HttpClient 4.5 使用 CloseableHttpClient 发起连接后,使用CloseableHttpResponse 接受返回结果,结果就报错了,上网查了下,有位stackoverflow的大兄弟说,只要将: CloseableHttpClient httpClient = HttpClients.createDefault(); 改为: CloseableHttpClient httpClient = HttpClients.custom().setConnectio…

最近在开发一个 App 的时候用到了数据库,可是在使用数据库的时候就出现了一些问题,在我查询表中的一些信息时出现了一下问题: Caused by: java.lang.IllegalStateException: Cannot perform this operation because the connection pool has been closed. at android.database.sqlite.SQLiteConnectionPool.throwIfClosedLocked(…

java.lang.IllegalStateException: Invalid use of BasicClientConnManager: connection still allocated.Make sure to release the connection before allocating another one. java.lang.IllegalStateException: Invalid use of BasicClientConnManager: connection s…

前言 最近在开发api-gateway的时候遇到了一个问题,网上能够找到的解决方案也很少,之后由公司的大佬解决了这个问题.写下这篇文章记录一下解决方案.希望可以帮助到更多的人. 环境 java版本:8 框架:spring-cloud 2.0.0.RC1 介绍 api-gateway主要接收前端请求,然后对请求的数据进行验证,验证之后请求反向代理到服务器.当请求 method 为 GET 时,可以顺利通过api-gateway.当请求 method 为 POST 时,api-gateway则会报如…

java.lang.IllegalStateExceptionorg.apache.catalina.connector.ResponseFacade.sendRedirect(ResponseFacade.java:423)经过分析.查看jdk文档终于找到解决的办法,在response.sendRedirect()方法后加return语句即可,如下:response.sendRedirect(login.jsp);return null;原因是:在程序中两次调用了response.sendRe…

九月 11, 2019 2:56:36 下午 org.apache.catalina.loader.WebappClassLoaderBase checkStateForResourceLoading 信息: Illegal access: this web application instance has been stopped already. Could not load [META-INF/services/com.alibaba.druid.filter.Filter]. The f…

把myeclipse10 按照目录完整拷贝到了另外一台电脑, 另外的目录 原安装目录 D\:\soft\i\myeclipse10 新安装目录 E\:\soft\myeclipse10 双击启动失败, 查看日志 could not find .. javax.transaction_1.1.1.v201105210645.jar ... java.lang.IllegalStateException: Unable to acquire application service. Ensure t…

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.xxx...}: java.lang.IllegalStateException: Couldn't read row 0, col -1 from CursorWindow.  Make sure the Cursor is initialized correctly before accessing data from it. 要检查列名拼写!列名拼写…

java.lang.IllegalStateException: Not allowed to create transaction on sharedEntityManager - use Spring transactions or EJB CMT instead 原因以我的理解是,SPRING的配置中没有开启事务.解决方法,在@Transactionalpublic class CategoryDAO {...}的实现类上,加上事务的注解.问题解决可以写入数据库,但是有一点还是不清楚,如果…

ERROR [Engine] StandardWrapperValve[jsp]: Servlet.service() for servlet jsp threw exceptionjava.lang.IllegalStateException: getOutputStream() has already been called for this response从网上找了下资料,综合一下原因分析:这是web容器生成的servlet代码中有out.write(””),这个和JSP中调用的resp…