CommunicationException s are thrown with the message 'Error while reading line from the server' from time to time. The Predis part of an example stack trace: We couldn't find anything in common in the affected scripts. Some errors are from a local Redis server, some from a remote one. An example that sometimes generates this error: The script is run by Apache, browsers call it directly by URL, so there can be a lot of instances running at once.
Static-A static character is someone who does not change over time; his or her personality does not transform or evolve. Round-A rounded character is anyone who has a complex personality; he or she is often portrayed as a conflicted and contradictory person. Flat-A flat character is the opposite of a round character.
The static keyword denotes that a member variable, or method, can be accessed without requiring an instantiation of the class to which it belongs. In simple terms, it means that you can call a method, even if you've never created the object to which it belongs! Every time you run a stand-alone application (which requires a static main method), the virtual machine can call the main method without creating a new application object. Of course, unless the application's methods are all static, you will need to create an instance of it at some point. With regard to member variables, it means that they can be read from, and written to, without creating an object.