Socket Error 2

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A new data transmission technology of penetrating firewall

Use this technical background: in the target host to the back door, you need to transfer data, at the same time the information is important, the action can not be too large. Other cases of "serious" do not recommend using this technique (I'll talk about why later). For some of the current firewall situation, if your process open a port (or even a new socket) must be blocked. On the contrary, it is clear to us that a process validated by a firewall will never be stopped when it transmits data. So my idea is simple: take the socket handle that allows data transfer in other processes to be used. The process is as follows: 1. Find the target ...

Process analysis of client clients for Hadoop RPC communication

Hadoop RPC communication is different from other systems RPC communication, the author for the use of Hadoop features, specifically designed a set of RPC framework, the framework of personal feeling is still a little complicated. So I'm going to split into client-side and Server service-side 2 modules for analysis. If you have a good understanding of RPC's entire process, you must be able to understand it very quickly for Hadoop RPC. OK, let's cut to the chase. The related code for the RPC of Hadoop is ORG.APAC ...

What if the computer doesn't restart?

Analysis of automatic restart failure to solve the problem of automatic restart failure solution One, software, 1, virus > "shock wave" virus outbreak will also prompt the system will automatically start in 60 seconds. Trojan programs remotely control all your computer's activities, including getting your computer restarted. Remove virus, Trojan, or reload System 2, System files damaged system files are destroyed, such as Win2K under the Kernel32.dll,win98 fonts directory, such as the font of the system when the basic files are destroyed, the system will be started without ...

How to securely configure and apply MySQL databases?

MySQL has become one of the most widely used databases in the current network, especially in Web applications, which occupy the absolute advantage of small and medium applications. It all stems from its compact, safe, efficient, open licensing and multi-platform, and, more important, the perfect combination of--php with one of the three web languages. Unfortunately, a default installation of MySQL, because the root password is empty and the program vulnerabilities caused by the overflow, so that the installation of MySQL server is a frequent target. What is more serious is that the database is often destroyed after the attack, causing disaster easily ...

mysql Can''t connect to MySQL server processing methods

can not connect to [local] mysql tutorial server b.5.2.2.1. Connect to mysql tutorial server in windows otherwise unix mysql client can connect to two different ways to start mysqld server: by using unix socket file, by connecting to the file system (default is / tmp / mysql.sock file connection ), Or by using the tcp / ip protocol, connect through a port number. A unix

FTP upload encountered Socket error how to do

Intermediary transaction http://www.aliyun.com/zixun/aggregation/6858.html ">seo diagnose Taobao guest cloud host technology Hall about FTP sockets cannot connect: Users are unable to upload files using FTP The situation of the list may be due to the choice of the PASV way to upload. Therefore, the user will change the upload mode to port. The same software, different versions, the setting method is slightly different ...

MapReduce data stream optimization based on Hadoop system

1 Hadoop pipeline improvement in the implementation of the Hadoop system, the output data of the map end is written to the local disk first, and the Jobtracker is notified when the native task is completed, and then the reduce end sends an HTTP request after receiving the Jobtracker notification. Pull back the output from the corresponding map end using the Copy method.   This can only wait for the map task to complete before the reduce task begins, and the execution of the map task and the reduce task is detached. Our improvement ...

Reverse Ajax:websockets a powerful solution

This article also discusses some of the constraints of using reverse Ajax technology on the server side. Users now expect to be able to access fast, dynamic applications from the Web. This series of articles shows how to use reverse Ajax http://www.aliyun.com/zixun/aggregation/7332.html "> Technology to develop event-driven Web applications." Reverse Ajax, Part 1th: Comet Introduction to reverse Ajax, polling ...

Regionserver Exception Timeout detection

Phenomenon will host network cable unplugged, regionserver over a period of time will be shutdown out, regionserver abnormal timeout detection mechanism is controlled by which parameter? Regionsever exception shutdown log: 2017-08-03 21:17:42,762 WARN [Main-sendthread (ocscloud07:9501)]zookeeper. Clientcnxn:session 0x25ce ...

Network optimization Nginx and node.js have several ways?

Translator: Alfredcheung on the topic of building high throughput Web applications, Nginx and Node.js are natural couples. They are all based on the event-driven model and are designed to easily break through the c10k bottlenecks of traditional Web servers such as Apache. Preset configurations can be highly concurrent, but there is still work to do if you want to do more than thousands of requests per second on inexpensive hardware. This article assumes that readers use Nginx's httpproxymodule for upstream node ....

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