connection | 易学教程

RabbitMQ new connection refused due to SocketException

阅读更多关于 RabbitMQ new connection refused due to SocketException

问题 while trying to create a new connection to rabbitmq running on a different server, I got the following error: java.io.IOException at com.rabbitmq.client.impl.AMQChannel.wrap(AMQChannel.java:106) at com.rabbitmq.client.impl.AMQChannel.wrap(AMQChannel.java:102) at com.rabbitmq.client.impl.AMQChannel.exnWrappingRpc(AMQChannel.java:124) at com.rabbitmq.client.impl.AMQConnection.start(AMQConnection.java:406) at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:516) at com

Check if socket is connected or not [duplicate]

阅读更多关于 Check if socket is connected or not [duplicate]

问题 This question already has answers here : How to find the socket connection state in C? (10 answers) Closed 3 years ago . I have an application which needs to send some data to a server at some time. The easy way would be to close the connection and then open it again when I want to send something. But I want to keep the connection open so when I want to send data, I first check the connection using this function: bool is_connected(int sock) { unsigned char buf; int err = recv(sock,&buf,1,MSG

How can I check my svn connection?

阅读更多关于 How can I check my svn connection?

问题 How can I check my svn connection? I just want to try to connect to server and check the status of my connection.. After that I will do something like check out and etc. well may be another way to get it? 回答1: If you do not have any checked-out working copy, you can use svn ls svn://server/repo which lists contents of the repository if connection is successfull. Other parameters like --username ABC --password XYZ and --non-interactive can be useful too if you are e.g. testing your credentials

how to escape special characters in mysql jdbc connection string

阅读更多关于 how to escape special characters in mysql jdbc connection string

im trying to connect to a remote database. im sure that the remote database provide me all the privileges. but im getting this error when trying to connect to the remote mysql database through jdbc connection . my password contains, * and & symbol , i think that is the problem cause to this error . but i dont know how to escape those characters . please help java.sql.SQLException: Access denied for user 'myusername'@'myhost' (using password: YES) "jdbc:mysql://myhost/mydb?user=myusername&password=my&password*" please help Regards Salman Bashir The JDBC connection string is in url format so you

Getting “I won't open a connection to” when connecting to FTP server from Google Compute Engine

阅读更多关于 Getting “I won't open a connection to” when connecting to FTP server from Google Compute Engine

问题 I ssh'ed to my compute engine's VM and want to ftp to another server from there. It asked my username and password, I could login without problem. but when I do ls or get , I receive this error: 500 I won't open a connection to 10.240.XX.XX (only to XX.XX.XX.XX) ftp: bind: Address already in use That 10.240.XX.XX is my internal IP address I saw in ifconfig result. How can I transfer files from another server using FTP? System: Debian7 回答1: You are using the active mode of FTP to connect to a

Web Application Nat Traversal

阅读更多关于 Web Application Nat Traversal

We are deploying web applications in java using tomcat on client machines across the country. Once they are installed, we want to allow a remote access to these web applications through a central server, but we do not want our clients to have to open ports on their routers. Is there a way to tunnel the http traffic in a way that the central server can access the web application that is behind the firewall ? The central server has a static ip address and we have full control over it. We don't need to access the filesystem, we only want to access the web application itself through a browser. For

How to test linkedserver's connectivity in TSQL

阅读更多关于 How to test linkedserver's connectivity in TSQL

问题 I need to write a procedure to collect data from several remote servers, I use linkedservers and OPENQUERY to gather data from servers, but sometimes I lose connection to some servers or I simply can't connect them (e.g. remote server is offline)- and OPENQUERY results in time-outs in these cases. So I wanted to check linkedservers connectivity first and then if it's successful run the query, if not just move on to next the remote server. I tried to put OPENQUERY in TRY - CATCH but it still

Wordpress FTP connection setting for localhost to upload and install WooCommerce

阅读更多关于 Wordpress FTP connection setting for localhost to upload and install WooCommerce

问题 I can't upload WooCommerce .zip file and install the plugin on the local host. Every time I click install button Wordpress asking for connection information for the FTP credentials like this pic: Even tough I entered localhost for the hostname and admin as username, it doesn't work! 回答1: Try: chmod 777 /Applications/XAMPP/xamppfiles/htdocs/wordpress/wp-content/plugins/ chmod 777 /Applications/XAMPP/xamppfiles/htdocs/wordpress/wp-content/themes/ Then add these to wp-config.php : /** Add here*/

查看Postgresql的连接状况

阅读更多关于查看Postgresql的连接状况

今天遇到一个问题，就是pg一直报错，说有太多的客户端连接到数据库上面。但现在不知道是什么程序连接。pg默认的max_connection是100，我并没有修改过，以为平时公司内部用，应该够了，但现在貌似这100个连接都被消耗掉。在网上google了一下，发现用下面的SQL，居然可以查看所有连接的状况： select * from pg_stat_activity; 结果集会显示出当前连接的数据库名，用户，IP地址，连接开始时间，查询的语句等。这里的pg_stat_activity其实是一个视图，它的定义可以在postgres这个数据库里面的视图部分找到，以下是它的定义： CREATE OR REPLACE VIEW pg_stat_activity AS SELECT s.datid, d.datname, s.procpid, s.usesysid, u.rolname AS usename, s.application_name, s.client_addr, s.client_hostname, s.client_port, s.backend_start, s.xact_start, s.query_start, s.waiting, s.current_query FROM pg_database d, pg_stat_get_activity(NULL:

Connection pooling with Java and MySQL in Tomcat web application

阅读更多关于 Connection pooling with Java and MySQL in Tomcat web application

I recently wrote and deployed a Java web application to a server and I'm finding an unusual problem which didn't appear during development or testing. When a user logs in after so long and goes to display data from the database, the page indicates that there are no records to see. But upon page refresh, the first x records are shown according to the pagination rules. Checking the logs, I find: ERROR|19 09 2009|09 28 54|http-8080-4|myDataSharer.database_access.Database_Metadata_DBA| - Error getting types of columns of tabular Dataset 12 com.mysql.jdbc.CommunicationsException: Communications