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The Year problem also known as Y[1] Y2K38the Epochalypse[2] [3] or the Friday 13th Bug [4] is a time formatting bug in computer systems with representing times after UTC on 19 January The problem exists in systems which measure Unix time — windows 10 java 64 bit sorunu free number of seconds elapsed since the Unix epoch UTC on 1 January — and store it in a signed bit integer. The problem is similar in nature to the Year problem.
Computer systems that use time for critical computations may encounter fatal errors if the Y problem is not addressed. Some applications that use future dates have already encountered the bug. The most vulnerable systems are those which are infrequently or never updated, such as legacy and embedded systems.
There is no universal solution to the problem, though many modern systems have been upgraded to measure Unix time with signed bit integers which will not windiws for billion years. Many computer systems measure time нажмите сюда date as Unix timean international standard for digital timekeeping.
Unix time is defined as the number of seconds elapsed since UTC on 1 January /27475.txt arbitrarily chosen timewhich has been dubbed the Unix epoch. From here, systems will continue to count up, towards zero, and then up through the positive integers again. As sprunu computer systems use time computations to run critical functions, the bug may introduce fatal wibdows.
By coincidence, the date to which vulnerable systems will reset is a Friday the 13th[4] considered an unlucky day in Western culture. Any system using data structures with bit time representations has an inherent risk to fail.
A full list of these data structures is virtually impossible to derive, but there are well-known подробнее на этой странице structures that have the Unix time problem:. Embedded systems that use dates for either computation or diagnostic logging are most likely to be affected by the Y problem. It is conceivable that some of these systems may still be in use in It may be impractical or, in some cases, impossible to upgrade the software running jjava systems, windows 10 java 64 bit sorunu free requiring replacement if the bit limitations are to be corrected.
Many transportation systems from flight to automobiles use embedded systems extensively. For example, the Y problem makes some devices running bit Android crash and not restart when the time is changed to that date. However, this does not imply that all embedded systems will suffer from the Y problem, since many such systems do not require access to на этой странице. In Mayfrwe surfaced of an early manifestation of the Y problem in the AOLserver software.
The software was designed with a kludge to handle a database request that should "never" time out. Rather than specifically handling this special case, the initial design simply specified an arbitrary time-out date in the future. The default configuration for the server specified that the request should time out after one billion seconds. One billion seconds approximately 32 years after UTC on 13 May windows 10 java 64 bit sorunu free beyond the cutoff date.
Thus, after this time, the time-out calculation overflowed and returned a date windows 10 java 64 bit sorunu free was actually in the past, causing перейти на страницу software to crash. When the problem was discovered, AOLServer operators had to edit the configuration file and set the time-out to a lower value.
Players of games or apps which are programmed to impose waiting periods [10] are running into this problem when the players try to bypass the waiting period by setting the date on their devices to a date past 19 Januarybut are unable to winxows so, since a bit Unix time format is being used.
There is no universal solution for the Year problem. Using a signed widows value introduces a new wraparound date that is over twenty times greater than the estimated age of the universe : approximately billion years from now.
Alternative proposals have been made some of which are already in usesuch as storing either milliseconds or microseconds since an epoch typically either 1 January or 1 January in a signed bit integer, providing a minimum range ofyears at microsecond resolution.
Other proposals for new time representations provide different precisions, ranges, and sizes almost always wider than 32 bitsas well as solving other related problems, such as the handling of leap seconds. In particular, TAI64 [14] is an implementation of the Смотрите подробнее Atomic Time TAI standard, the current international real-time standard for defining a second and frame of reference.
From Wikipedia, the free encyclopedia. Computer software bug occurring in The Guardian. Retrieved 11 October Tom's Guide. Dorunu Year Bug Site. Archived from the original on 9 January Code quality: the open source perspective. Effective software development series in Safari But Online illustrated ed. Adobe Press. ISBN Retrieved 20 November California Air Resources Board. Retrieved 19 Windows 10 java 64 bit sorunu free Retrieved 19 March Archived from the original on 8 April Retrieved 29 September Retrieved 1 April Retrieved 18 January Archived from the original on 4 Bjt Retrieved 9 March Retrieved 30 January March RFC читать полностью Stanford University.
Archived from the original on 24 July Retrieved 8 January November windkws Retrieved 17 April Year problem Year problem Year problem Year problem Year problem Year 10, problem Leap year problem. Year problem. Time formatting and storage bugs Time code ambiguity Epoch.
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