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com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
...tions.
DB server has run out of connections.
Something in between Java and DB is blocking connections, e.g. a firewall or proxy.
To solve the one or the other, follow the following advices:
Verify and test them with ping.
Refresh DNS or use IP address in JDBC URL instead.
...
Passing data to Master Page in ASP.NET MVC
...utions are probably more correct but this is a nice balance between design and practicality IMHO.
The master page takes a strongly typed view data class containing only information relevant to it:
public class MasterViewData
{
public ICollection<string> Navigation { get; set; }
}
Each ...
How can I check if a var is a string in JavaScript?
...Also, you may as well use == (equality comparison operator) since both operands are Strings (typeof always returns a String), JavaScript is defined to perform the same steps had I used === (strict comparison operator).
As Box9 mentions, this won't detect a instantiated String object.
You can dete...
How to fix Array indexOf() in JavaScript for Internet Explorer browsers
...ough rep to edit the question but feel free to remove the ECMAScript lingo and replace with the appropriate wording. Thanks Again
– Bobby Borszich
Nov 16 '09 at 19:47
12
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Xcode “The private key for is not installed on this mac - distributing”
...on Certificate by going to XCode Preferences->Accounts->View Details and then clicking the + underneath the list of signing identities.
Go back to the developer website and make sure all your provisioning profiles are configured with the new certificate. (They should all be listed as Active wh...
Spring Cache @Cacheable - not working while calling from another method of the same bean
...ber reading, there is a proxy class generated that intercepts all requests and responds with the cached value, but 'internal' calls within the same class will not get the cached value.
From https://code.google.com/p/ehcache-spring-annotations/wiki/UsingCacheable
Only external method calls comin...
Placing/Overlapping(z-index) a view above another view in android
I have a linear layout which consists of imageview and textview , one below another in a linear layout.
11 Answers
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Best practices when running Node.js with port 80 (Ubuntu / Linode) [closed]
I am setting up my first Node.js server on a cloud Linux node and I am fairly new to the details of Linux admin . (BTW I am not trying to use Apache at the same time.)
...
What's the simplest way to list conflicted files in Git?
... @Pacerier, it's just messier. If you had a million unconflicting merges and one conflicting merge, you'd want something succinct for output.
– xster
Jan 7 '16 at 20:50
8
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Is there a version control system for database structure changes?
...file, which has rules to increase the db version (such as adding a column) and rules to downgrade the version (such as removing a column). Each migration is numbered, and a table keeps track of your current db version.
To migrate up, you run a command called "db:migrate" which looks at your version...