# Exceptions

## Classes
class | Passenger::SystemException
| Represents an error returned by a system call or a standard library call. More...
class | Passenger::FileSystemException
| A filesystem error, as returned by the operating system. More...
class | Passenger::TimeRetrievalException
| Unable to retrieve the system time using `time()`. More...
class | Passenger::IOException
| Represents an error that occured during an I/O operation. More...
class | Passenger::EOFException
| An unexpected end-of-file I/O error. More...
class | Passenger::ArgumentException
| Indicates that a specified argument is incorrect or violates a requirement. More...
class | Passenger::RuntimeException
| A generic runtime exception. More...
class | Passenger::TimeoutException
| An exception indicating that some timeout expired. More...
class | Passenger::SecurityException
| Represents some kind of security error. More...
class | Passenger::BusyException
| The application pool is too busy and cannot fulfill a get() request. More...