Object Oriented Software Engineering   View all facts   Glossary   Help

subject > problem > defect > hung system

hung system
subject			fact

hung system	has definition A system that appears to the user to not be doing anything, caused by such things as a crash, a deadlock, a livelock or an infinite loop
	is a subtopic of 10.5 - Defects in Timing and Co-Ordination: Deadlock, Livelocks and Critical Races
	is a kind of defect
	is a kind of software system
	may be caused by deadlock livelock a single thread waiting for an unavailable resource an infinite loop a crash
defect	has example the absence of code to handle an exception
software system	becomes complex because it is easy to add new features and because software engineers typically add features without fully understanding a system, which may not have been originally designed to accommodate the features
	can automate business process
	can be divided in many ways: A distributed system is divided up into clients and servers A system is divided up into subsystems A class is divided up into methods
	is better at error handling if it effectively prevents the user from making errors, detects errors, and helps the user to correct errors
	is typically initially developed as a prototype
	must have well-described requirements if other systems or subsystems are going to use its services or communicate with it
	should be designed for flexibility right from the start
	undergoes evolution over its life-span
problem	has solution which will normally entail developing software, although you may decide that it is better to purchase software or to develop a non-software solution
	should be written as a simple problem statement in one or two sentences
system	can have specification which is then implemented by a collection of components
	exists even if its components change over the course of time, or are replaced by equivalent components
	has scope
	has part component
	has part hardware
	has part module
	has part software
	has part subsystem
	is divided up into subsystems

Next defect: timing and co-ordination defect    Up: defect, software system    Previous defect: documentation defect