Error Forwarding
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(Discuss) Proposed since January 2015. In telecommunication, information theory, and coding theory, forward error correction (FEC) or channel coding[1]
Forward Error Correction Tutorial
is a technique used for controlling errors in data transmission forward error handling over unreliable or noisy communication channels. The central idea is the sender encodes the message in
Forward Error Correction Algorithm
a redundant way by using an error-correcting code (ECC). The American mathematician Richard Hamming pioneered this field in the 1940s and invented the first error-correcting code forward error correction rate in 1950: the Hamming (7,4) code.[2] The redundancy allows the receiver to detect a limited number of errors that may occur anywhere in the message, and often to correct these errors without retransmission. FEC gives the receiver the ability to correct errors without needing a reverse channel to request retransmission of data, forward error correction library but at the cost of a fixed, higher forward channel bandwidth. FEC is therefore applied in situations where retransmissions are costly or impossible, such as one-way communication links and when transmitting to multiple receivers in multicast. FEC information is usually added to mass storage devices to enable recovery of corrupted data, and is widely used in modems. FEC processing in a receiver may be applied to a digital bit stream or in the demodulation of a digitally modulated carrier. For the latter, FEC is an integral part of the initial analog-to-digital conversion in the receiver. The Viterbi decoder implements a soft-decision algorithm to demodulate digital data from an analog signal corrupted by noise. Many FEC coders can also generate a bit-error rate (BER) signal which can be used as feedback to fine-tune the analog receiving electronics. The noisy-channel coding theorem establishes bounds on the theoretical maximum information transfer rate of a channel with some
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Forward Error Control
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Forward Error Recovery
92 Projects 0 Wiki Pulse Graphs New issue Error forwarding the new session Error forwarding the request Read timed https://en.wikipedia.org/wiki/Forward_error_correction out #1261 Open etwxabh opened this Issue Nov 16, 2015 · 13 comments Projects None yet Labels C-grid Milestone No milestone Assignees No one assigned 10 participants etwxabh commented Nov 16, 2015 We are running https://github.com/seleniumhq/selenium/issues/1261 selenium tests against Chrome 46 on Selenium grid and we got the below error frequently: Exception in thread "main" org.openqa.selenium.WebDriverException: Error forwarding the new session Error forwarding the request Read timed out Command duration or timeout: 662.06 seconds Build info: version: '2.46.0', revision: '61506a4624b13675f24581e453592342b7485d71', time: '2015-06-04 10:22:50' System info: host: 'IE00079760', ip: '192.168.56.1', os.name: 'Windows 7', os.arch: 'amd64', os.version: '6.1', java.version: '1.7.0_17' Driver info: org.openqa.selenium.remote.RemoteWebDriver at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:525) at org.openqa.selenium.remote.ErrorHandler.createThrowable(ErrorHandler.java:204) at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:156) at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:605) at org.openqa.selenium.remote.RemoteWebDriver.startSession(RemoteWebDriver.java:242) at org.openqa.selenium.remote.RemoteWebDriver.(RemoteWebDriver.java:128) at org.openqa.selenium.remote.RemoteWebDriver.(RemoteWebDriver.java:155) at webdriver.WebdriverExample.main(WebdriverExample.java:69) Caused by: org.openqa.selenium.WebDriverException: Error forwarding the new session Error forwarding the request Read timed out Build info: version: '2.46.0', revision: '61506a4624b13675f24581e453592342b7485d71', time: '2015-06-04 1
can't reply or else http://stackoverflow.com/questions/36619010/selenium-remote-driver-error-forwarding-the-new-session-cannot-find they get an error. This is my mx record: http://prntscr.com/cnzt3y I am not sure what should be in the target box so I just put the only forward error thing I could think of which works was my domain. The error the people get is this: Delivery to the following recipient failed permanently: info@atkinson.cf Technical details of permanent failure:DNS Error: 22089441 DNS type forward error correction 'mx' lookup of atkinson.cf responded with code NOERROR22089441 DNS type 'mx' lookup of atkinson.cf had no relevant answers.22089441 DNS type 'aaaa' lookup of atkinson.cf responded with code NOERROR22089441 DNS type 'aaaa' lookup of atkinson.cf had no relevant answers.22089441 DNS type 'a' lookup of atkinson.cf responded with code NOERROR22089441 DNS type 'a' lookup of atkinson.cf had no relevant answers. In case you were wondering this is my forward list with a valid forwarder email http://prntscr.com/cnzukq If there is any other info I can provide tell me. Home Categories FAQ/Guidelines Terms of Service Privacy Policy Powered by Discourse, best viewed with JavaScript enabled
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Selenium Remote Driver Error forwarding the new session cannot find up vote 1 down vote favorite I am using Selenium Grid. I have updated the VM (node) to Windows 10 recently, and it doesn't work anymore. Here is the details I register this VM Win10 as node to the Grid by: java -Dwebdriver.ie.driver=C:\Selenium\IEDriverServer.exe -jar selenium-server-standalone-2.53.0.jar -role node -hub http://10.0.50.34:4444/grid/register/ -trustAllSSLCertificates (this worked fine with VM Win8 before) I can see on the grid that this VM Win10 is registered with 3 browser IE11, FF and Chrome In my code, I create web driver by this: capabilities = DesiredCapabilities.firefox(); capabilities.setCapability("applicationName", "qa-user"); webDriver = new RemoteWebDriver(new URL("http://10.0.50.34:4444/wd/hub"), capabilities); I always get this error when I execute the test Error forwarding the new session cannot find : Capabilities [{platform=ANY, browserName=firefox, applicationName=qa-user, version=}] It worked like this before with all browsers on the node. I don't know if I miss some settings on the node VM Win10. Any advices much appreciated. Thanks java selenium selenium-webdriver selenium-grid remotewebdriver share|improve this question asked Apr 14 at 9:31 Louis T 50321024 add a comment| 1 Answer 1 active oldest votes up vote 0 down vote Have you tried to run your test specifying the path to IEDriver directly in your class ? Personally for my VM Win10 i use this : java -jar selenium-server-standalone-2.53.0.jar -role hub -port 4444 -host x.x.x.x Java class : System.setProperty("webdriver.ie.driver", "C:\\Users\\IEUser\\Desktop\\selenium-grid\\IEDriverServer.exe"); Error forwarding the new session cannot find : Capabilities [{platform=ANY, browserName=firefox, applicationName=qa-user, version=}] This error show that your try to create a new browser session with a capability that the Grid doesn't know about