最近在练习微服务架构中, 使用IDEA配置完Hystrix, 添加熔断方法后, 在浏览器中访问未启动的( 含有熔断方法注解 )的路径时, 报出了 : 500: No instances available for user-service 的错误页面. 异常信息如下: java.lang.IllegalStateException: No instances available for user-service at org.springframework.cloud.netflix.ribbo…
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…
1. 用java实现文件下载,提示java.lang.IllegalStateException: getOutputStream() has already been called for this response 2.代码如下 3.控制台提示信息图 4.解决方案是:在给处理下载文件转发的jsp页面,添加 <% out.clear(); out = pageContext.pushBody(); %>…