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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 ha...
Django: ImproperlyConfigured: The SECRET_KEY setting must not be empty
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Hint: in order to identify what's causing the issue, e.g. add a random print statement in the settings file and move it around to see where it breaks.
– Felix Böhme
Sep 30 '15 at 15:52
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What is the point of function pointers?
...nters is the C library qsort() function, which implements a Quick Sort. In order to be universal for any and all data structures the user may come up with, it takes a couple of void pointers to sortable data and a pointer to a function that knows how to compare two elements of these data structures....
How to detect if JavaScript is disabled?
...kie flag, etc..
</script>
<noscript>
<a href="next_page.php?nojs=1">Next Page</a>
</noscript>
Users without js will get the next_page link - you can add parameters here so that you know on the next page whether they've come via a JS/non-JS link, or attempt to set ...
Access-Control-Allow-Origin wildcard subdomains, ports and protocols
...Leaving it up to each individual user to build their own shim using custom PHP code, rewrite rules, or what-have-you is a recipe for fragmentation, bugs, and disaster. Server devs should know better than that; and if they don't, the CORS spec should force them to.
– aroth
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How to get all possible combinations of a list’s elements?
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the input iterable.
Combinations are emitted in lexicographic sort order. So, if the
input iterable is sorted, the
combination tuples will be produced in
sorted order.
Since 2.6, batteries are included!
share...
Using Auto Layout in UITableView for dynamic cell layouts & variable row heights
...ll to grow in height. (Of course, you need to get the constraints right in order for this to work correctly!)
Getting your constraints right is definitely the hardest and most important part of getting dynamic cell heights working with Auto Layout. If you make a mistake here, it could prevent every...
How can I link to a specific glibc version?
...
it gives a nice overview of the build steps:
Available build steps, in order:
- companion_tools_for_build
- companion_libs_for_build
- binutils_for_build
- companion_tools_for_host
- companion_libs_for_host
- binutils_for_host
- cc_core_pass_1
- kernel_headers
- libc_start_file...
How do I use valgrind to find memory leaks?
...free this pointer?
json_decref(root); //What about this one? Does the order matter?
return 0;
}
This is a simple program: it reads a JSON string and parses it. In the making,
we use library calls to do the parsing for us. Jansson makes the necessary
allocations dynamically since JSON ca...
OAuth with Verification in .NET
... (url-encoded and joined by ampersands), and in a lexicographically-sorted order, generate a signature on that result, then pack up those same parameters along with the signature, stored in the new oauth_signature parameter, in a different way (joined by commas). The OAuth manager class does this f...