错误:试图打开未关闭的连接.在我自己写model文件的时候,重复打开了连接数据库的操作,所以报这种错误. 错误实例: 两个model文件: userModel.js var mongoose = require('mongoose'); var config = require('./../config/config'); mongoose.connect(config.mongodb); var PostSchema = new mongoose.Schema({ title:String,/…

给别人做的网站莫名其妙连接不上数据库.百度了好多,总算知道自己的错在哪了. 报 "A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server…

SSH error ( Read from socket failed: Connection reset by peer ) and it's solution ssh cann't connected ,event in localhost[root@localhost ssh]# ssh 127.0.0.1Read from socket failed: Connection reset by peertry the following refer to internet ,but fai…

1.错误信息 Error waiting for a debug connection: ProcessException: adb did not report forwarded port 2.解决方法 升级adb,其实是更新SDK Platform-Tools就可以了. 步骤:打开 Android SDK  >>> SDK Tools  勾选 Android SDK Flatform-Tools,运行 Applay 或者点击 ok . 3.原文详细内容 地址:https://www…

本文涉及的相关问题,如果你的问题或需求有与下面所述相似之处,请阅读本文 A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is c…

====环境== openstack :kilo CentOS : 7 ====问题=== 在没有关vm的情况下,重启了controller. 问题一: 在使用nova service-list 或者openstack-status的时候或者其他认证需求的时候出现以下错误 ERROR: openstack Unable to establish connection to http://controller:35357/v3/auth/tokens ConnectionRefused: Unab…

ssh-copy-id bigboss1 /usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed /usr/bin/ssh-copy-id: ERROR: Read from socket failed: Connection reset by peer 解决办法: rm -rf /root/.ssh/* 后重新配置ssh…

今天同事给我发了个图片过来,  服务器环境 sql 2000 + IIS7 看到这张图片,我先自己试了下,确实是有这个问题的,而且不是偶然性的,那么再看报错意思,在跟sql建立连接的时候发生了一个错误. 我首先检查了配置文件有没有被改过,发现没有:我就在本地调试,发现本地不存在这个问题,于是我又看了下相关的代码文件有没有被改过,还是没有:那么是哪里出了问题呢?我只好上远程看看有没有什么限制远程访问 之类的东西,也没有:既然提到了远程连接,那我就把配置文件的sql连接地址改成 local 试下,一…

不多说,直接上干货! http://www.aboutyun.com/forum.php?mod=viewthread&tid=20455&extra=&page=2 欢迎大家,加入我的微信公众号:大数据躺过的坑        人工智能躺过的坑       同时,大家可以关注我的个人博客:    http://www.cnblogs.com/zlslch/   和     http://www.cnblogs.com/lchzls/      http://www.cnblogs.…

错误现象:…

简介 mongodb是一款面向文档的数据库,不是关系型数据库,新手熟悉mysql.sqlserver等数据库的人可能入手稍微困难些,需要转换一下思想,可以不需要有固定的存储模式,以文档模型为存储内容相对有更好的扩展性,给我的感觉它更像是一个方便的javascript扩展单元,因为现在我所知的一些功能都可以靠js脚本实现并在数据库中执行.更多查看mongodb官网 命令 mongodb在终端中通过输入命令可查看数据库信息及操作相关数据.1.show dbs :数据库列表2.db :当前数据库3.d…

使用PuTTY连接AWS的时候,一直出现network error connection refused.百度了这个问题,大家都说是SSH要设置成22.但是我已经设置过了,为什么还是遇到这个问题呢? 原来官方早已给了答案.大家看下边. 排查实例的连接问题 下面是在您尝试连接到实例时可能遇到的问题与错误消息. 内容 连接到您的实例时出错:连接超时 错误:服务器无法识别用户密钥 错误:未找到主机密钥,权限被拒绝 (publickey),或者 身份验证失败,权限被拒绝 错误:未保护的私钥文件 错误:服…

报错背景: CDH集群中,将kafka和Flume整合,将kafka的数据发送给Flume消费. 启动kafka的时候正常,但是启动Flume的时候出现了报错现象. 报错现象: DH--.cdh5./lib/hadoop/lib/native:/opt/cloudera/parcels/CDH--.cdh5./lib/hbase/bin/../lib/native/Linux-amd64- // :: INFO zookeeper.ZooKeeper: Client environment:ja…

A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connection…

安装openstack后遇到的第一个问题. 执行命令nova list得到如下结果: [root@localhost ~(keystone_admin)]# nova list No handlers could be found for logger "keystoneauth.identity.generic.base" ERROR (ConnectFailure): Unable to establish connection to http://10.20.0.14:5000/…

[故障|监听]TNS-12518.TNS-00517和 Linux Error:32:Broken pipe 1.1  BLOG文档结构图 1.2  前言部分 1.2.1  导读和注意事项 各位技术爱好者,看完本文后,你可以掌握如下的技能,也可以学到一些其它你所不知道的知识,~O(∩_∩)O~: ① Linux Error: 32: Broken pipe的可能原因(重点) ② TNS-12518: TNS:listener could not hand off client connectio…

Issue: When you execute systemctl command in docker container, you may receive following error. Error: Failed to get D-Bus connection: No connection to service Solution: docker run --privileged  -ti centos:centos7  /usr/sbin/init…

最近在做Java后台的项目,用到了druid数据库连接池,阿里出品,肯定是精品的意思咯,这也是我们老大搭建的框架,我就站在前人的肩膀上飞翔了.先前在一个事物里,使用了多条数据库操作,都是正常的,但是前天出了问题,一直报java.sql.SQLException: connection holder is null 异常,很是苦恼. 因为有***,首先用的是Google,但是这个是阿里出品,国人用的比较多,找到的基本都是咱们程序员弄的答案,大致的解决方案如下: 1:设置removeAbandone…

openresty 错误日志报错内容: // :: [error] #: * upstream timed : A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond) while conn…

查看此问题的时候请先查看 这个问题包含在(十)中,此篇只是从(十)中分离出来 openstack-kilo--issue(十)ERROR: openstack Unable to establish connection to http://controller:35357/v3/auth/tokens ==========================      如果遇到下面这样的问题   请参考上面的网址的问题二的解决方案    ==============================…

啦啦啦 这种情况 root@localhost:/# mongo MongoDB shell version: connecting to: test --31T07:: W NETWORK [thread1] Failed to connect to , Connection refused --31T07:: E QUERY [thread1] Error: couldn't connect to server 127.0.0.1:27017, connection attempt fail…

http://jwcooney.com/2012/08/13/asp-net-error-adding-the-specified-count-to-the-semaphore-would-cause-it-to-exceed-its-maximum-count/ Justin Cooney / 2012/08/13 If you are working with ASP.NET in Visual Studio, then you may be mystified when you see a…

ERROR - No operations allowed after connection closed. 2011-12-07 11:36:09 - ERROR - query failed org.hibernate.exception.JDBCConnectionException: could not execute query at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:74)…

[ERROR] - com.alibaba.druid.support.logging.Log4j2Impl.error(Log4j2Impl.java:53) - create connection error, url: jdbc:mysql://10.1.200.45:3306/, errorCode 1040, state 08004com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Data sou…

SQL Server Connection Pooling (ADO.NET) Connecting to a database server typically consists of several time-consuming steps. A physical channel such as a socket or a named pipe must be established, the initial handshake with the server must occur, the…

Oracle 11gR2 RAC 数据库不能连接(ORA-12537: TNS:connection closed)的解决 [oracle@rac01 ~]$ sqlplus /nolog SQL*Plus: Release 11.2.0.1.0 Production on Wed Aug 29 21:06:10 2012 Copyright (c) 1982, 2009, Oracle.  All rights reserved. SQL> connect system/***@astt ER…

    Oracle 11gR2 RAC 数据库不能连接(ORA-12537: TNS:connection closed)的解决 [oracle@rac01 ~]$ sqlplus /nolog SQL*Plus: Release 11.2.0.1.0 Production on Wed Aug 29 21:06:10 2012 Copyright (c) 1982, 2009, Oracle.  All rights reserved. SQL> connect system/***@ast…

Appendix B. Error Codes and MessagesTable of Contents B.1. Server Error Codes and MessagesB.2. Client Error Codes and MessagesThis appendix lists the errors that may appear when you call MySQL from any host language. The first list displays server er…

本文转自:http://www.codeproject.com/Articles/534651/HowplustoplussolveplusSSISpluserrorpluscodeplus0xC Background SSIS is the one of the best ETL tool available in market and it can load large amount of data from any heterogeneous data source whether str…

Overview This document explains about definition of these values on OUI Chartron. Definition of Error Types Error to Origin (50x) Hits/Sec The hits per seconds of response 504. As RFC2616, "504" means "Gateway Timeout". But CS use this…