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Name node is in safe mode. Not able to leave
...
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...
Django rest framework nested self-referential objects
...gories')
def get_related_field(self, model_field):
# Handles initializing the `subcategories` field
return CategorySerializer()
Actually, as you've noted the above isn't quite right.
This is a bit of a hack, but you might try adding the field in after the seriali...
Python Linked List
...st is defined simply by '(1 2 3 4 5) . Python's lists, [1, 2, 3, 4, 5] , and tuples, (1, 2, 3, 4, 5) , are not, in fact, linked lists, and linked lists have some nice properties such as constant-time concatenation, and being able to reference separate parts of them. Make them immutable and they a...
Convert Python dict into a dataframe
... answered Sep 16 '13 at 21:12
Andy HaydenAndy Hayden
262k7373 gold badges527527 silver badges485485 bronze badges
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HTML.ActionLink vs Url.Action in ASP.NET Razor
...tes:
<a href="/somecontroller/someaction/123">link text</a>
and Url.Action("someaction", "somecontroller", new { id = "123" }) generates:
/somecontroller/someaction/123
There is also Html.Action which executes a child controller action.
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Showing a different background colour in Vim past 80 characters
...n Vim window open with the leftmost 80 columns using the normal background and anything past that using a slightly different background. The Vim window background should be a different color, not just text that goes over the 80 character point. This would indicate how close I am getting to the 80-ch...
iOS - How to set a UISwitch programmatically
... answered Oct 17 '11 at 21:34
Andrew_LAndrew_L
2,94222 gold badges1616 silver badges1818 bronze badges
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Changing element style attribute dynamically using JavaScript
... work just fine.
However, the thing you need to remember for padding-top, and for any hyphenated attribute name, is that in javascript, you remove the hyphen, and make the next letter uppercase, so in your case that'd be paddingTop.
There are some other exceptions. JavaScript has some reserved wor...
Why does “git difftool” not open the tool directly?
...rompt
Prompt before each invocation of the diff tool.
The following command turns off the prompt globally (for all repos):
git config --global difftool.prompt false
Which is like writing in ~/.gitconfig:
(or in %HOMEDRIVE%%HOMEPATH%\.gitconfig)
[difftool]
prompt = false
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How can I get a file's size in C++? [duplicate]
...?
Before answering, make sure it is portable (may be executed on Unix, Mac and Windows),
reliable, easy to understand and without library dependencies (no boost or qt, but for instance glib is ok since it is portable library).
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