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-   -   Oyster outage (https://www.londonbanter.co.uk/london-transport/14710-oyster-outage.html)

Roland Perry January 2nd 16 08:30 AM

Oyster outage
 
"Thousands of rail, bus and Tube passengers enjoyed free
transport on Saturday after London’s Oyster card network
collapsed.

Barriers are rail and tube stations were opened by staff after
Oyster card 'reader' machines used to register the start and end
of each journey failed to work throughout the network."

http://www.telegraph.co.uk/news/uknews/road-and-rail-
transport/12077955/Londons-Oyster-card-system-crashes-giving-thousands-
free-travel.html

I wonder if this is a random fault, or a "Y2K" type of problem.

I remember when the Nottingham City Transport smartcard had one of the
latter at New Year in around 2006.
--
Roland Perry

Recliner[_3_] January 2nd 16 08:38 AM

Oyster outage
 
Roland Perry wrote:
"Thousands of rail, bus and Tube passengers enjoyed free
transport on Saturday after London’s Oyster card network
collapsed.

Barriers are rail and tube stations were opened by staff after
Oyster card 'reader' machines used to register the start and end
of each journey failed to work throughout the network."

http://www.telegraph.co.uk/news/uknews/road-and-rail-
transport/12077955/Londons-Oyster-card-system-crashes-giving-thousands-
free-travel.html

I wonder if this is a random fault, or a "Y2K" type of problem.

I remember when the Nottingham City Transport smartcard had one of the
latter at New Year in around 2006.


I notice that the handwritten sign says that contactless cards should be
used as normal, so the fault was specifically with the Oyster system. Apart
from the change of year, there was also the normal New Year's free travel
-- I wonder if the attempt to re-set to normal chargeable travel failed?


Roland Perry January 2nd 16 08:50 AM

Oyster outage
 
In message
-sept
ember.org, at 09:38:40 on Sat, 2 Jan 2016, Recliner
remarked:

I wonder if this is a random fault, or a "Y2K" type of problem.

I remember when the Nottingham City Transport smartcard had one of the
latter at New Year in around 2006.


I notice that the handwritten sign says that contactless cards should be
used as normal, so the fault was specifically with the Oyster system. Apart
from the change of year, there was also the normal New Year's free travel
-- I wonder if the attempt to re-set to normal chargeable travel failed?


The free travel thing points even more to a Y2K style problem, if the
charging system wasn't active yesterday. In the Nottingham case it
wasn't spotted until the 2nd because no buses ran on the 1st.

ps I note some NatWest debit cards had outages on the 1st: another Y2K
problem perhaps.
--
Roland Perry

Peter Smyth[_3_] January 2nd 16 10:00 AM

Oyster outage
 
Recliner wrote:

Roland Perry wrote:
"Thousands of rail, bus and Tube passengers enjoyed free
transport on Saturday after London’s Oyster card network
collapsed.

Barriers are rail and tube stations were opened by staff
after Oyster card 'reader' machines used to register the
start and end of each journey failed to work throughout the
network."

http://www.telegraph.co.uk/news/uknews/road-and-rail-
transport/12077955/Londons-Oyster-card-system-crashes-giving-thousan
ds- free-travel.html

I wonder if this is a random fault, or a "Y2K" type of problem.

I remember when the Nottingham City Transport smartcard had one of
the latter at New Year in around 2006.


I notice that the handwritten sign says that contactless cards should
be used as normal, so the fault was specifically with the Oyster
system. Apart from the change of year, there was also the normal New
Year's free travel -- I wonder if the attempt to re-set to normal
chargeable travel failed?


The free travel ended at 0430 1st Jan and there weren't any reports of
problems yesterday. I'm guessing it is relating to the annual fares
increase which takes effect today, there was probably some sort of
update being pushed out to the gates overnight which has failed.

Peter Smyth

Richard J.[_3_] January 2nd 16 10:12 AM

Oyster outage
 
Roland Perry wrote on 02 Jan 2016 at 09:50 ...
In message
-sept
ember.org, at 09:38:40 on Sat, 2 Jan 2016, Recliner
remarked:

I wonder if this is a random fault, or a "Y2K" type of problem.

I remember when the Nottingham City Transport smartcard had one of the
latter at New Year in around 2006.


I notice that the handwritten sign says that contactless cards should be
used as normal, so the fault was specifically with the Oyster system. Apart
from the change of year, there was also the normal New Year's free travel
-- I wonder if the attempt to re-set to normal chargeable travel failed?


The free travel thing points even more to a Y2K style problem, if the
charging system wasn't active yesterday. In the Nottingham case it
wasn't spotted until the 2nd because no buses ran on the 1st.

ps I note some NatWest debit cards had outages on the 1st: another Y2K
problem perhaps.


For decades, computer systems have exhibited faults after a holiday
period, caused often by problems in restarting hardware or software
after a holiday outage or reverting to normal operation after
non-standard holiday operation, or caused by changes to the system that
were applied during the holiday. Why are you assuming that this
particular instance was in any way similar to Y2K?

--
Richard J.
(to email me, swap 'uk' and 'yon' in address)

Roland Perry January 2nd 16 10:32 AM

Oyster outage
 
In message , at 11:12:16 on Sat, 2 Jan
2016, Richard J. remarked:
The free travel thing points even more to a Y2K style problem, if the
charging system wasn't active yesterday. In the Nottingham case it
wasn't spotted until the 2nd because no buses ran on the 1st.

ps I note some NatWest debit cards had outages on the 1st: another Y2K
problem perhaps.


For decades, computer systems have exhibited faults after a holiday
period, caused often by problems in restarting hardware or software
after a holiday outage or reverting to normal operation after
non-standard holiday operation, or caused by changes to the system that
were applied during the holiday. Why are you assuming that this
particular instance was in any way similar to Y2K?


Firstly, because a very similar incident *was* tracked down to that
cause, and secondly the other routine issues you mention ought to be
well understood and planned for during a holiday period.

Plus the fact they are having to talk to their suppliers to work out a
fix, rather than applying a clue-bat to the sysadmin-du-jour.
--
Roland Perry

Recliner[_3_] January 2nd 16 10:36 AM

Oyster outage
 
On Sat, 2 Jan 2016 11:00:45 -0000 (UTC), "Peter Smyth"
wrote:

Recliner wrote:

Roland Perry wrote:
"Thousands of rail, bus and Tube passengers enjoyed free
transport on Saturday after London’s Oyster card network
collapsed.

Barriers are rail and tube stations were opened by staff
after Oyster card 'reader' machines used to register the
start and end of each journey failed to work throughout the
network."

http://www.telegraph.co.uk/news/uknews/road-and-rail-
transport/12077955/Londons-Oyster-card-system-crashes-giving-thousan
ds- free-travel.html

I wonder if this is a random fault, or a "Y2K" type of problem.

I remember when the Nottingham City Transport smartcard had one of
the latter at New Year in around 2006.


I notice that the handwritten sign says that contactless cards should
be used as normal, so the fault was specifically with the Oyster
system. Apart from the change of year, there was also the normal New
Year's free travel -- I wonder if the attempt to re-set to normal
chargeable travel failed?


The free travel ended at 0430 1st Jan and there weren't any reports of
problems yesterday. I'm guessing it is relating to the annual fares
increase which takes effect today, there was probably some sort of
update being pushed out to the gates overnight which has failed.


Yes, that appears to have been the problem.

Roland Perry January 2nd 16 10:44 AM

Oyster outage
 
In message , at 11:00:45 on Sat, 2 Jan 2016,
Peter Smyth remarked:

The free travel ended at 0430 1st Jan and there weren't any reports of
problems yesterday.


That's a good point. I was expecting the free travel to have been all
day on the 1st.
--
Roland Perry

tim..... January 2nd 16 11:33 AM

Oyster outage
 

"Roland Perry" wrote in message
...
In message , at 11:12:16 on Sat, 2 Jan
2016, Richard J. remarked:
The free travel thing points even more to a Y2K style problem, if the
charging system wasn't active yesterday. In the Nottingham case it
wasn't spotted until the 2nd because no buses ran on the 1st.

ps I note some NatWest debit cards had outages on the 1st: another Y2K
problem perhaps.


For decades, computer systems have exhibited faults after a holiday
period, caused often by problems in restarting hardware or software after
a holiday outage or reverting to normal operation after non-standard
holiday operation, or caused by changes to the system that were applied
during the holiday. Why are you assuming that this particular instance
was in any way similar to Y2K?


Firstly, because a very similar incident *was* tracked down to that cause,
and secondly the other routine issues you mention ought to be well
understood and planned for during a holiday period.

Plus the fact they are having to talk to their suppliers to work out a
fix, rather than applying a clue-bat to the sysadmin-du-jour.


ISTR that the "contracted out" admin and the suppliers are the same people

tim




Roland Perry January 2nd 16 11:50 AM

Oyster outage
 
In message , at 12:33:58 on Sat, 2 Jan 2016,
tim..... remarked:

Plus the fact they are having to talk to their suppliers to work out
a fix, rather than applying a clue-bat to the sysadmin-du-jour.


ISTR that the "contracted out" admin and the suppliers are the same people


The admin are son-of-EDS and the suppliers Cubic, I thought.
--
Roland Perry

[email protected] January 2nd 16 12:20 PM

Oyster outage
 
On Sat, 2 Jan 2016 12:50:45 +0000
Roland Perry wrote:
In message , at 12:33:58 on Sat, 2 Jan 2016,
tim..... remarked:

Plus the fact they are having to talk to their suppliers to work out
a fix, rather than applying a clue-bat to the sysadmin-du-jour.


ISTR that the "contracted out" admin and the suppliers are the same people


The admin are son-of-EDS and the suppliers Cubic, I thought.


Probably with half the development and support staff based in Bombangaloristan
to save a few quid. You pays your money....

--
Spud


tim..... January 2nd 16 01:06 PM

Oyster outage
 

"Roland Perry" wrote in message
...
In message , at 12:33:58 on Sat, 2 Jan 2016,
tim..... remarked:

Plus the fact they are having to talk to their suppliers to work out a
fix, rather than applying a clue-bat to the sysadmin-du-jour.


ISTR that the "contracted out" admin and the suppliers are the same people


The admin are son-of-EDS


Oh, who are "son of EDS" (I need to keep track of them as they own me a
pension from 4 mergers ago)

tim



Roland Perry January 2nd 16 01:48 PM

Oyster outage
 
In message , at 14:06:54 on Sat, 2 Jan 2016,
tim..... remarked:

The admin are son-of-EDS


Oh, who are "son of EDS" (I need to keep track of them as they own me a
pension from 4 mergers ago)


HP Enterprise Services. In Plano, Texas [1], which gives another clue to
its parentage.

[1] Also home of the Ewings. I've been to the ranch, that's the real one
not the film-set in California.
--
Roland Perry

[email protected] January 2nd 16 01:59 PM

Oyster outage
 
On 02.01.16 9:30, Roland Perry wrote:
"Thousands of rail, bus and Tube passengers enjoyed free
transport on Saturday after London’s Oyster card network
collapsed.

Barriers are rail and tube stations were opened by staff after
Oyster card 'reader' machines used to register the start and end
of each journey failed to work throughout the network."

http://www.telegraph.co.uk/news/uknews/road-and-rail-
transport/12077955/Londons-Oyster-card-system-crashes-giving-thousands-
free-travel.html

I wonder if this is a random fault, or a "Y2K" type of problem.

I remember when the Nottingham City Transport smartcard had one of the
latter at New Year in around 2006.


What time did this occur? I used the tube yesterday without any
difficulties, though I was using contactless.

What are the stats, BTW, on contactless replacing Oyster?

Roland Perry January 2nd 16 02:32 PM

Oyster outage
 
In message , at 14:59:06 on Sat, 2 Jan 2016,
" remarked:

What time did this occur? I used the tube yesterday without any
difficulties, though I was using contactless.


Contactless was unaffected.

What are the stats, BTW, on contactless replacing Oyster?


Dunno; it would be good to get some numbers.

I assume this applies mainly to PAYG - I don't think you can load a
Travelcard Season onto a contactless CC.
--
Roland Perry

Recliner[_3_] January 2nd 16 02:32 PM

Oyster outage
 
wrote:
On 02.01.16 9:30, Roland Perry wrote:
"Thousands of rail, bus and Tube passengers enjoyed free
transport on Saturday after London’s Oyster card network
collapsed.

Barriers are rail and tube stations were opened by staff after
Oyster card 'reader' machines used to register the start and end
of each journey failed to work throughout the network."

http://www.telegraph.co.uk/news/uknews/road-and-rail-
transport/12077955/Londons-Oyster-card-system-crashes-giving-thousands-
free-travel.html

I wonder if this is a random fault, or a "Y2K" type of problem.

I remember when the Nottingham City Transport smartcard had one of the
latter at New Year in around 2006.


What time did this occur? I used the tube yesterday without any
difficulties, though I was using contactless.


It happened this morning when they tried and failed to download the new
fares tables to the gates. It only affected Oyster, not contactless (as the
fares calculations are done in the back office with contactless).


What are the stats, BTW, on contactless replacing Oyster?


Dunno, but they'd be interesting.


[email protected] January 2nd 16 03:19 PM

Oyster outage
 
On 02.01.16 15:32, Roland Perry wrote:
In message , at 14:59:06 on Sat, 2 Jan 2016,
" remarked:

What time did this occur? I used the tube yesterday without any
difficulties, though I was using contactless.


Contactless was unaffected.

What are the stats, BTW, on contactless replacing Oyster?


Dunno; it would be good to get some numbers.

I assume this applies mainly to PAYG - I don't think you can load a
Travelcard Season onto a contactless CC.


You cannot load a Travelcard Season on contactless, though TfL does at
least apply daily and weekly caps on them AIUI.

Takes away the point of going to the machines.

It wouldn't surprise me if they are looking at introducing this in
Netherlands as the whole country is zoned.



martin January 2nd 16 03:42 PM

Oyster outage
 
It's just occurred to me that the free fares on New Year's Eve aren't solely a case of TfL (or their sponsors') benevolence, but more to do with the difficulty of correctly charging for journeys which span the 'start of ticketing day' at 0430.

https://nighttube.london/customer-information/ says that the ticketing system wasn't previously capable of this, but Cubic have recently updated the backend so that it can cope when (if?) night tube eventually starts.

I wonder if it's coincidence that free travel on New Year's Eve began on 31/12/03 - the first year that Oyster cards were available?

Richard J.[_3_] January 2nd 16 03:58 PM

Oyster outage
 
Roland Perry wrote on 02 Jan 2016 at 11:32 ...
In message , at 11:12:16 on Sat, 2 Jan
2016, Richard J. remarked:
The free travel thing points even more to a Y2K style problem, if the
charging system wasn't active yesterday. In the Nottingham case it
wasn't spotted until the 2nd because no buses ran on the 1st.

ps I note some NatWest debit cards had outages on the 1st: another Y2K
problem perhaps.


For decades, computer systems have exhibited faults after a holiday
period, caused often by problems in restarting hardware or software
after a holiday outage or reverting to normal operation after
non-standard holiday operation, or caused by changes to the system that
were applied during the holiday. Why are you assuming that this
particular instance was in any way similar to Y2K?


Firstly, because a very similar incident *was* tracked down to that
cause,


You mean there was a very similar incident 16 years ago? But what is
special about 1/1/2016 compared to 1/1/2015, 1/1/2014, etc?

and secondly the other routine issues you mention ought to be
well understood and planned for during a holiday period.


In theory, yes, but in practice there is always a greater risk of a
problem following a period of non-standard operations. This is
especially so if you're doing a major update of fare tables across the
network, which might be "routine" in the sense that you do it every
year, but is still a more obvious likely cause than some previously
unknown fundamental problem connected with 1/1/2016.

Plus the fact they are having to talk to their suppliers to work out a
fix, rather than applying a clue-bat to the sysadmin-du-jour.


Quite normal if there's a major system outage. It doesn't tell you
anything about the cause.
--
Richard J.
(to email me, swap 'uk' and 'yon' in address)

Clive Page[_3_] January 2nd 16 04:00 PM

Oyster outage
 
On 02/01/2016 11:36, Recliner wrote:
On Sat, 2 Jan 2016 11:00:45 -0000 (UTC), "Peter Smyth"


The free travel ended at 0430 1st Jan and there weren't any reports of
problems yesterday. I'm guessing it is relating to the annual fares
increase which takes effect today, there was probably some sort of
update being pushed out to the gates overnight which has failed.


Yes, that appears to have been the problem.


If so, why would they be able to accept contact-less cards while Oyster
was u/s? Don't the same fares get charged either way?

Any why, if all you had to do to get a free trip was to claim to have an
Oyster card, would anyone during the outage try to use a contact-less card?


--
Clive Page

martin January 2nd 16 04:28 PM

Oyster outage
 
On Saturday, 2 January 2016 17:00:55 UTC, Clive Page wrote:

Any why, if all you had to do to get a free trip was to claim to have an
Oyster card, would anyone during the outage try to use a contact-less card?


Lack of knowledge? My friend left for work at 0615 this morning, and said the gates were closed at Wood Green, so she touched in as normal (but a '1' flashed up on the display rather than her balance).

Roland Perry January 2nd 16 06:31 PM

Oyster outage
 
In message , at 16:58:52 on Sat, 2 Jan
2016, Richard J. remarked:
Why are you assuming that this
particular instance was in any way similar to Y2K?


Firstly, because a very similar incident *was* tracked down to that
cause,


You mean there was a very similar incident 16 years ago?


The Nottingham City Transport smartcard issue in around 2006.

But what is special about 1/1/2016 compared to 1/1/2015, 1/1/2014, etc?


Or 1/1/2006 compared to 1/1/2000. There's something about the range of
years for which 1/1/xxxx is recognised, which transcends xxxx=2000.
--
Roland Perry

Roland Perry January 2nd 16 06:33 PM

Oyster outage
 
In message , at 17:00:46 on Sat, 2 Jan
2016, Clive Page remarked:

Any why, if all you had to do to get a free trip was to claim to have
an Oyster card, would anyone during the outage try to use a
contact-less card?


I think that's called "not understanding the exact nature of the outage
and not wanting to be caught deliberately evading fares, even if for a
short time TfL will decide not to worry about it".
--
Roland Perry

Roland Perry January 2nd 16 06:36 PM

Oyster outage
 
In message , at 16:19:53 on Sat, 2 Jan 2016,
" remarked:

It wouldn't surprise me if they are looking at introducing this in
Netherlands as the whole country is zoned.


The Dutch railway system over the whole country is about the same size
in terms of number of stations and permutations of routes as TfL is in
just London. Try Zoning the non-TfL bits of the UK and there will be so
many winners and losers you'd never hear the end of it.
--
Roland Perry

Clank January 2nd 16 06:57 PM

Oyster outage
 
Roland Perry wrote:
In message , at 17:00:46 on Sat, 2 Jan
2016, Clive Page remarked:

Any why, if all you had to do to get a free trip was to claim to have
an Oyster card, would anyone during the outage try to use a
contact-less card?


I think that's called "not understanding the exact nature of the outage
and not wanting to be caught deliberately evading fares, even if for a
short time TfL will decide not to worry about it".


There is also the crazy notion of "honesty" and "believing in paying for a
service because it's the right thing to do", which is not in fact entirely
lost to the world...

(Back in the day when I travelled regularly between unstaffed stations with
PERTIS machines, I actually used to pay my fare in full, or seek out the
guard if I didn't have enough change. Strange but true.)


[email protected] January 2nd 16 11:47 PM

Oyster outage
 
In article , (Roland Perry)
wrote:

In message , at 16:58:52 on Sat, 2
Jan 2016, Richard J. remarked:
Why are you assuming that this
particular instance was in any way similar to Y2K?

Firstly, because a very similar incident *was* tracked down to that
cause,


You mean there was a very similar incident 16 years ago?


The Nottingham City Transport smartcard issue in around 2006.

But what is special about 1/1/2016 compared to 1/1/2015, 1/1/2014, etc?


Or 1/1/2006 compared to 1/1/2000. There's something about the range
of years for which 1/1/xxxx is recognised, which transcends xxxx=2000.


That's not the millennium bug then. It was about years being held in 2
digits so not able to handle properly to rollover of the century.

--
Colin Rosenstiel

Roland Perry January 3rd 16 07:42 AM

Oyster outage
 
In message , at 18:47:45
on Sat, 2 Jan 2016, remarked:
Why are you assuming that this
particular instance was in any way similar to Y2K?

Firstly, because a very similar incident *was* tracked down to that
cause,

You mean there was a very similar incident 16 years ago?


The Nottingham City Transport smartcard issue in around 2006.

But what is special about 1/1/2016 compared to 1/1/2015, 1/1/2014, etc?


Or 1/1/2006 compared to 1/1/2000. There's something about the range
of years for which 1/1/xxxx is recognised, which transcends xxxx=2000.


That's not the millennium bug then. It was about years being held in 2
digits so not able to handle properly to rollover of the century.


It's the same class of problem, which is why I put the "Y2K" in quotes.
--
Roland Perry

[email protected] January 4th 16 08:48 AM

Oyster outage
 
On Sun, 03 Jan 2016 17:32:16 +0000
Paul Corfield wrote:
I haven't seen the precise detail of why downloads seemingly failed
but I am not as deeply sceptical as some on here about the table
testing process. All the "oh they can't have tested it properly"
comments are unlikely to be true. There were / are very well


Well they quite evidently didn't test for some condition otherwise the failure
wouldn't have occured.

This is simple. Oyster cards hold value on the card and are read,
processed and then written back to with an updated balance and journey
history. In order to work out a PAYG fare or extension fare then you


I'd love to know how many hacked Oysters or DIY cards are out there that
can be loaded with a random value and/or don't decrement the value.

--
Spud


Someone Somewhere January 4th 16 09:15 AM

Oyster outage
 
On 04/01/2016 09:48, d wrote:
On Sun, 03 Jan 2016 17:32:16 +0000
Paul Corfield wrote:

This is simple. Oyster cards hold value on the card and are read,
processed and then written back to with an updated balance and journey
history. In order to work out a PAYG fare or extension fare then you


I'd love to know how many hacked Oysters or DIY cards are out there that
can be loaded with a random value and/or don't decrement the value.

--
Spud

Presumably the "read" part of the above has some form of linked
reconciliation which quickly identifies and blocks those cards?

[email protected] January 4th 16 10:27 AM

Oyster outage
 
On Mon, 4 Jan 2016 10:15:37 +0000
Someone Somewhere wrote:
On 04/01/2016 09:48, d wrote:
On Sun, 03 Jan 2016 17:32:16 +0000
Paul Corfield wrote:

This is simple. Oyster cards hold value on the card and are read,
processed and then written back to with an updated balance and journey
history. In order to work out a PAYG fare or extension fare then you


I'd love to know how many hacked Oysters or DIY cards are out there that
can be loaded with a random value and/or don't decrement the value.

--
Spud

Presumably the "read" part of the above has some form of linked
reconciliation which quickly identifies and blocks those cards?


Not when the original MiFare was hacked they didn't. Anyway, if its DIY
card they could easily program in a rolling Id number. I doubt if the gates
keep a list of every single valid card thats been issued, probably just
blocked ones if anything. Presumably the version 1 cards are still valid so
that hack could still be used. Which probably means it is.

--
Spud


Dr J R Stockton[_42_] January 4th 16 10:32 PM

Oyster outage
 
In uk.transport.london message , Sat, 2
Jan 2016 16:58:52, Richard J. posted:


You mean there was a very similar incident 16 years ago? But what is
special about 1/1/2016 compared to 1/1/2015, 1/1/2014, etc?


It is the first year 20xx for which xx cannot be stored in four bits.

If memory space was limited in a system designed a decade ago, someone
might have chosen to use just four bits for the variable part of the
year, thinking "Well, I'll not be in this job in 2016, ha ha!".


--
(c) John Stockton, Surrey, UK. Turnpike v6.05 MIME.
Merlyn Web Site - FAQish topics, acronyms, & links.



Recliner[_3_] January 4th 16 10:52 PM

Oyster outage
 
Dr J R Stockton wrote:
In uk.transport.london message , Sat, 2
Jan 2016 16:58:52, Richard J. posted:


You mean there was a very similar incident 16 years ago? But what is
special about 1/1/2016 compared to 1/1/2015, 1/1/2014, etc?


It is the first year 20xx for which xx cannot be stored in four bits.

If memory space was limited in a system designed a decade ago, someone
might have chosen to use just four bits for the variable part of the
year, thinking "Well, I'll not be in this job in 2016, ha ha!".


Well, as we soon learned, the problem wasn't any sort of Y2K issue. But in
any case, Y2K type bugs date from software designed 40 or more years ago,
when every byte mattered; Oyster is far too recent for the designers to
have been trying to save microscopic amounts of memory.


[email protected] January 5th 16 12:16 AM

Oyster outage
 
In article id,
lid (Dr J R Stockton) wrote:

In uk.transport.london message , Sat, 2
Jan 2016 16:58:52, Richard J. posted:

You mean there was a very similar incident 16 years ago? But what is
special about 1/1/2016 compared to 1/1/2015, 1/1/2014, etc?


It is the first year 20xx for which xx cannot be stored in four bits.

If memory space was limited in a system designed a decade ago, someone
might have chosen to use just four bits for the variable part of the
year, thinking "Well, I'll not be in this job in 2016, ha ha!".


I think they'd learned that lesson before the millennium.

--
Colin Rosenstiel

Roland Perry January 5th 16 06:40 AM

Oyster outage
 
In message
-sept
ember.org, at 23:52:54 on Mon, 4 Jan 2016, Recliner
remarked:
You mean there was a very similar incident 16 years ago? But what is
special about 1/1/2016 compared to 1/1/2015, 1/1/2014, etc?


It is the first year 20xx for which xx cannot be stored in four bits.

If memory space was limited in a system designed a decade ago, someone
might have chosen to use just four bits for the variable part of the
year, thinking "Well, I'll not be in this job in 2016, ha ha!".


Well, as we soon learned, the problem wasn't any sort of Y2K issue. But in
any case, Y2K type bugs date from software designed 40 or more years ago,


Nope, plenty of things which actually failed were much more recent than
that.

when every byte mattered; Oyster is far too recent for the designers to
have been trying to save microscopic amounts of memory.


That doesn't explain why the NCT Smartcards broke on 1/1/2006.
--
Roland Perry

Clive Page[_3_] January 5th 16 08:54 AM

Oyster outage
 
On 03/01/2016 17:32, Paul Corfield wrote:

Paul, thanks for your explanation.

Well far too many people were getting ridiculously excited about "free
travel" - it was all over Twitter. By the time the excitement reached
fever pitch the fault had been fixed.


I wonder how they brought the system back up - I assumed that there
would have been quite a number travelling using Oyster who didn't have
their card read on entry who would have been expected to touch out after
the system came back up, thereby getting an unresolved journey and a
hefty penalty. I haven't heard any howls of protest about that
occurring so maybe it didn't. Or maybe lots of people get unresolved
journeys so often and are rich enough that they simply don't care?


--
Clive Page

[email protected] January 5th 16 08:57 AM

Oyster outage
 
On Tue, 5 Jan 2016 09:54:33 +0000
Clive Page wrote:
On 03/01/2016 17:32, Paul Corfield wrote:

Paul, thanks for your explanation.

Well far too many people were getting ridiculously excited about "free
travel" - it was all over Twitter. By the time the excitement reached
fever pitch the fault had been fixed.


I wonder how they brought the system back up - I assumed that there
would have been quite a number travelling using Oyster who didn't have
their card read on entry who would have been expected to touch out after
the system came back up, thereby getting an unresolved journey and a
hefty penalty. I haven't heard any howls of protest about that
occurring so maybe it didn't. Or maybe lots of people get unresolved
journeys so often and are rich enough that they simply don't care?


Apparently they'll get a refund. Whether it'll happen or not is anyones guess.
If it had been me I'd have just gone to the guy at the gate and explained the
situation and refuse to touch out.

--
Spud


Peter CS January 5th 16 10:21 AM

Oyster outage
 
Dr J R Stockton wrote in news:d6s+
lid:

In uk.transport.london message , Sat, 2
Jan 2016 16:58:52, Richard J. posted:


You mean there was a very similar incident 16 years ago? But what is
special about 1/1/2016 compared to 1/1/2015, 1/1/2014, etc?


It is the first year 20xx for which xx cannot be stored in four bits.

If memory space was limited in a system designed a decade ago, someone
might have chosen to use just four bits for the variable part of the
year, thinking "Well, I'll not be in this job in 2016, ha ha!".


The certainly was a time when saving 4 bits in a date would be worthwhile,
but by 1999 we'd got beyond that, I hope.

During a particularly wearisome Y2K fix job one of my team remarked that
we'd better allow for 5-digit years or we'd have to do the whole thing
again in 8000 years' time.

Peter


[email protected] January 5th 16 10:48 AM

Oyster outage
 
On Tue, 5 Jan 2016 11:21:09 +0000 (UTC)
Peter CS wrote:
Dr J R Stockton wrote in news:d6s+
:

In uk.transport.london message , Sat, 2
Jan 2016 16:58:52, Richard J. posted:


You mean there was a very similar incident 16 years ago? But what is
special about 1/1/2016 compared to 1/1/2015, 1/1/2014, etc?


It is the first year 20xx for which xx cannot be stored in four bits.

If memory space was limited in a system designed a decade ago, someone
might have chosen to use just four bits for the variable part of the
year, thinking "Well, I'll not be in this job in 2016, ha ha!".


The certainly was a time when saving 4 bits in a date would be worthwhile,
but by 1999 we'd got beyond that, I hope.


In a back end system certainly. In a smartcard with perhaps only a few KB of
RAM possibly not.

--
Spud


[email protected] January 5th 16 06:34 PM

Oyster outage
 
In article , d () wrote:

On Tue, 5 Jan 2016 11:21:09 +0000 (UTC)
Peter CS wrote:
Dr J R Stockton wrote in
. invalid:

In uk.transport.london message , Sat,
2 Jan 2016 16:58:52, Richard J. posted:


You mean there was a very similar incident 16 years ago? But what is
special about 1/1/2016 compared to 1/1/2015, 1/1/2014, etc?

It is the first year 20xx for which xx cannot be stored in four bits.

If memory space was limited in a system designed a decade ago, someone
might have chosen to use just four bits for the variable part of the
year, thinking "Well, I'll not be in this job in 2016, ha ha!".


The certainly was a time when saving 4 bits in a date would be
worthwhile, but by 1999 we'd got beyond that, I hope.


In a back end system certainly. In a smartcard with perhaps only a
few KB of RAM possibly not.


The time when dates had to be so compressed passed before the advent of
smartcards, believe me.

--
Colin Rosenstiel

Mizter T January 5th 16 10:29 PM

Oyster outage
 

On 02/01/2016 11:44, Roland Perry wrote:

In message , at 11:00:45 on Sat, 2 Jan 2016,
Peter Smyth remarked:

The free travel ended at 0430 1st Jan and there weren't any reports of
problems yesterday.


That's a good point. I was expecting the free travel to have been all
day on the 1st.


Why? It's been 2345 NYE to 0430 NYD for years and years and years.


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