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Name node is in safe mode. Not able to leave
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In order to forcefully let the namenode leave safemode, following command should be executed:
bin/hadoop dfsadmin -safemode leave
You are getting Unknown command error for your command as -safemode isn't a sub-command for hadoop fs, but it is of hadoop dfsadmin.
Also after the above comman...
Print JSON parsed object?
...splay the object in the console as a collapsed tree. You can open the tree and inspect the object.
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What is the size of an enum in C?
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Taken from the current C Standard (C99): http://www.open-std.org/JTC1/SC22/WG14/www/docs/n1256.pdf
6.7.2.2 Enumeration specifiers
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Constraints
The expression that defines the value of an enumeration constant shall be an integer
constan...
What is Linux’s native GUI API?
Both Windows (Win32 API) and OS X (Cocoa) have their own APIs to handle windows, events and other OS stuff. I have never really got a clear answer as to what Linux’s equivalent is?
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How to access the local Django webserver from outside world
...ollowed the instructions here to run Django using the built-in webserver and was able to successfully run it using python manage.py runserver . If I access 127.0.0.1:port locally from the webserver, I get the Django page indicating it worked.
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How to display long messages in logcat
...1000 then you can split the string you want to log with String.subString() and log it in pieces. For example:
int maxLogSize = 1000;
for(int i = 0; i <= veryLongString.length() / maxLogSize; i++) {
int start = i * maxLogSize;
int end = (i+1) * maxLogSize;
end = end > veryLongStri...
How do I mock the HttpContext in ASP.NET MVC using Moq?
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Create a request, response and put them both to HttpContext:
HttpRequest httpRequest = new HttpRequest("", "http://mySomething/", "");
StringWriter stringWriter = new StringWriter();
HttpResponse httpResponse = new HttpResponse(stringWriter);
HttpCont...
Constructor in an Interface?
...which implement the message interface, I can only define the
send method and not the constructor"
...these requirements are exactly what abstract classes are for.
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Facebook access token server-side validation for iPhone app
...developing iPhone application, that is based on communication with server, and I want to use Facebook authentication mechanisms.
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How to use java.net.URLConnection to fire and handle HTTP requests?
Use of java.net.URLConnection is asked about pretty often here, and the Oracle tutorial is too concise about it.
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