[Geoserver-devel] Some funny discovery about time parsing: no more than 100 times!

GeoServer GeoServer Developer
1

Hi,
today I’ve made a funny discovery about some code that was written by a certain Andrea some 7 years ago [1]…
basically, if you pass a start/end/period indication to the time parameters, and that identifies more than 100
times, the code will silently return only the first 100 in the series, logging a warning.

That thing is configurable by a system variable, but it’s hard to find, and honestly, I did not remember this at all.
I’d propose to:

  • Make it UI configurable among the service limits (having a limit is certainly good, but this hidden it’s not so useful)
  • Throw an exception when the limit is exceeded, like other service limits. And I’d consider this a bug fix, the current behavior is non discoverable.
    Objections? Suggestions?

Cheers
Andrea

···

[1]: back when we first donated time/elevation support in GeoServer

==
GeoServer Professional Services from the experts! Visit http://goo.gl/it488V for more information.

Ing. Andrea Aime
@geowolf
Technical Lead

GeoSolutions S.A.S.
Via di Montramito 3/A
55054 Massarosa (LU)
phone: +39 0584 962313
fax: +39 0584 1660272
mob: +39 339 8844549

http://www.geo-solutions.it
http://twitter.com/geosolutions_it

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2

Hi,

:smiley: :smiley: :smiley: I agree looks like a bug to me.

···

On 04/24/2018 05:12 PM, Andrea Aime wrote:

Hi,
today I’ve made a funny discovery about some code that was written by a certain Andrea some 7 years ago [1]…

basically, if you pass a start/end/period indication to the time parameters, and that identifies more than 100
times, the code will silently return only the first 100 in the series, logging a warning.

That thing is configurable by a system variable, but it’s hard to find, and honestly, I did not remember this at all.
I’d propose to:

  • Make it UI configurable among the service limits (having a limit is certainly good, but this hidden it’s not so useful)
  • Throw an exception when the limit is exceeded, like other service limits. And I’d consider this a bug fix, the current behavior is non discoverable.

Objections? Suggestions?

Cheers
Andrea

[1]: back when we first donated time/elevation support in GeoServer

== GeoServer Professional Services from the experts! Visit http://goo.gl/it488V for more information. == Ing. Andrea Aime @geowolf Technical Lead GeoSolutions S.A.S. Via di Montramito 3/A 55054 Massarosa (LU) phone: +39 0584 962313 fax: +39 0584 1660272 mob: +39 339 8844549 http://www.geo-solutions.it http://twitter.com/geosolutions_it

AVVERTENZE AI SENSI DEL D.Lgs. 196/2003

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The information in this message and/or attachments, is intended solely for the attention and use of the named addressee(s) and may be confidential or proprietary in nature or covered by the provisions of privacy act (Legislative Decree June, 30 2003, no.196 - Italy’s New Data Protection Code).Any use not in accord with its purpose, any disclosure, reproduction, copying, distribution, or either dissemination, either whole or partial, is strictly forbidden except previous formal approval of the named addressee(s). If you are not the intended recipient, please contact immediately the sender by telephone, fax or e-mail and delete the information in this message that has been received in error. The sender does not give any warranty or accept liability as the content, accuracy or completeness of sent messages and accepts no responsibility for changes made after they were sent or for other risks which arise as a result of e-mail transmission, viruses, etc.

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Regards,
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==
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55054  Massarosa (LU)
Italy
phone: +39 0584 962313
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AVVERTENZE AI SENSI DEL D.Lgs. 196/2003
Le informazioni contenute in questo messaggio di posta elettronica e/o nel/i file/s allegato/i sono da considerarsi strettamente riservate. Il loro utilizzo è consentito esclusivamente al destinatario del messaggio, per le finalità indicate nel messaggio stesso. Qualora riceviate questo messaggio senza esserne il destinatario, Vi preghiamo cortesemente di darcene notizia via e-mail e di procedere alla distruzione del messaggio stesso, cancellandolo dal Vostro sistema. Conservare il messaggio stesso, divulgarlo anche in parte, distribuirlo ad altri soggetti, copiarlo, od utilizzarlo per finalità diverse, costituisce comportamento contrario ai principi dettati dal D.Lgs. 196/2003.
 
The information in this message and/or attachments, is intended solely for the attention and use of the named addressee(s) and may be confidential or proprietary in nature or covered by the provisions of privacy act (Legislative Decree June, 30 2003, no.196 - Italy's New Data Protection Code).Any use not in accord with its purpose, any disclosure, reproduction, copying, distribution, or either dissemination, either whole or partial, is strictly forbidden except previous formal approval of the named addressee(s). If you are not the intended recipient, please contact immediately the sender by telephone, fax or e-mail and delete the information in this message that has been received in error. The sender does not give any warranty or accept liability as the content, accuracy or completeness of sent messages and accepts no responsibility  for changes made after they were sent or for other risks which arise as a result of e-mail transmission, viruses, etc.
3

Andrea,

that definitely qualifies as a bug fix. An exception is much preferred over silent truncation.

- Can the limit be made discoverable?

- Is there some kind of pagination facility that would permit the client to request chunks of no more than 100 results? Or do they have to guess time ranges based on time intervals from a sample?

Perhaps the documentation could include some guidance to clients.

Kind regards,
Ben.

On 25/04/18 04:12, Andrea Aime wrote:

Hi,
today I've made a funny discovery about some code that was written by a
certain Andrea some 7 years ago [1]....
basically, if you pass a start/end/period indication to the time
parameters, and that identifies more than 100
times, the code will silently return only the first 100 in the series,
logging a warning.

That thing is configurable by a system variable, but it's hard to find, and
honestly, I did not remember this at all.
I'd propose to:

    - Make it UI configurable among the service limits (having a limit is
    certainly good, but this hidden it's not so useful)
    - Throw an exception when the limit is exceeded, like other service
    limits. And I'd consider this a bug fix, the current behavior is non
    discoverable.

Objections? Suggestions?

Cheers
Andrea

[1]: back when we first donated time/elevation support in GeoServer

==
GeoServer Professional Services from the experts! Visit http://goo.gl/it488V
for more information.

Ing. Andrea Aime
@geowolf
Technical Lead

GeoSolutions S.A.S.
Via di Montramito 3/A
55054 Massarosa (LU)
phone: +39 0584 962313
fax: +39 0584 1660272
mob: +39 339 8844549

http://www.geo-solutions.it
http://twitter.com/geosolutions_it

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divulgarlo anche in parte, distribuirlo ad altri soggetti, copiarlo, od
utilizzarlo per finalità diverse, costituisce comportamento contrario ai
principi dettati dal D.Lgs. 196/2003.

The information in this message and/or attachments, is intended solely for
the attention and use of the named addressee(s) and may be confidential or
proprietary in nature or covered by the provisions of privacy act
(Legislative Decree June, 30 2003, no.196 - Italy's New Data Protection
Code).Any use not in accord with its purpose, any disclosure, reproduction,
copying, distribution, or either dissemination, either whole or partial, is
strictly forbidden except previous formal approval of the named
addressee(s). If you are not the intended recipient, please contact
immediately the sender by telephone, fax or e-mail and delete the
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made after they were sent or for other risks which arise as a result of
e-mail transmission, viruses, etc.

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New Zealand

4

On Wed, Apr 25, 2018 at 3:29 AM, Ben Caradoc-Davies <ben@anonymised.com>
wrote:

Andrea,

that definitely qualifies as a bug fix. An exception is much preferred
over silent truncation.

- Can the limit be made discoverable?

You mean in the capabilities? As far as I know there is no way to do so,
the syntax for time specification is too complex

- Is there some kind of pagination facility that would permit the client
to request chunks of no more than 100 results? Or do they have to guess
time ranges based on time intervals from a sample?

The WMS specification has no facility to paginate over dimensions, although
it would certainly be nice.
The WMTS dimension extension (in unsupported) goes somewhat in that
direction allowing a client to discover the structure of the time dimension,
and then take decisions on pagination if needed. The module per se has
little that's WMTS specific and we'd like to extend it to WMS as well, time
and funding permitting

Cheers
Andrea

==
GeoServer Professional Services from the experts! Visit http://goo.gl/it488V
for more information.

Ing. Andrea Aime
@geowolf
Technical Lead

GeoSolutions S.A.S.
Via di Montramito 3/A
55054 Massarosa (LU)
phone: +39 0584 962313
fax: +39 0584 1660272
mob: +39 339 8844549

http://www.geo-solutions.it
http://twitter.com/geosolutions_it

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principi dettati dal D.Lgs. 196/2003.

The information in this message and/or attachments, is intended solely for
the attention and use of the named addressee(s) and may be confidential or
proprietary in nature or covered by the provisions of privacy act
(Legislative Decree June, 30 2003, no.196 - Italy's New Data Protection
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5

On Wed, Apr 25, 2018 at 3:29 AM, Ben Caradoc-Davies <ben@anonymised.com>
wrote:

Andrea,

that definitely qualifies as a bug fix. An exception is much preferred
over silent truncation.

Merged on master, but was not small and required many changes, also in the
UI:
https://github.com/geoserver/geoserver/pull/2859/commits/51b17298fdcc3c2f63c89d421dfee01ff124764d

Now what, in terms of backport... is this a bug fix or a new feature? It's
kind of both :slight_smile:

Cheers
Andrea

==

GeoServer Professional Services from the experts! Visit http://goo.gl/it488V
for more information.

Ing. Andrea Aime
@geowolf
Technical Lead

GeoSolutions S.A.S.
Via di Montramito 3/A
55054 Massarosa (LU)
phone: +39 0584 962313
fax: +39 0584 1660272
mob: +39 339 8844549

http://www.geo-solutions.it
http://twitter.com/geosolutions_it

AVVERTENZE AI SENSI DEL D.Lgs. 196/2003

Le informazioni contenute in questo messaggio di posta elettronica e/o
nel/i file/s allegato/i sono da considerarsi strettamente riservate. Il
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utilizzarlo per finalità diverse, costituisce comportamento contrario ai
principi dettati dal D.Lgs. 196/2003.

The information in this message and/or attachments, is intended solely for
the attention and use of the named addressee(s) and may be confidential or
proprietary in nature or covered by the provisions of privacy act
(Legislative Decree June, 30 2003, no.196 - Italy's New Data Protection
Code).Any use not in accord with its purpose, any disclosure, reproduction,
copying, distribution, or either dissemination, either whole or partial, is
strictly forbidden except previous formal approval of the named
addressee(s). If you are not the intended recipient, please contact
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does not give any warranty or accept liability as the content, accuracy or
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6

Bugfix for me :slight_smile:

···

On Wed, Apr 25, 2018 at 3:29 AM, Ben Caradoc-Davies <ben@anonymised.com> wrote:

Andrea,

that definitely qualifies as a bug fix. An exception is much preferred over silent truncation.

Merged on master, but was not small and required many changes, also in the UI:
https://github.com/geoserver/geoserver/pull/2859/commits/51b17298fdcc3c2f63c89d421dfee01ff124764d

Now what, in terms of backport… is this a bug fix or a new feature? It’s kind of both :slight_smile:

Cheers
Andrea

==

GeoServer Professional Services from the experts! Visit http://goo.gl/it488V for more information.

Ing. Andrea Aime
@geowolf
Technical Lead

GeoSolutions S.A.S.
Via di Montramito 3/A
55054 Massarosa (LU)
phone: +39 0584 962313
fax: +39 0584 1660272
mob: +39 339 8844549

http://www.geo-solutions.it
http://twitter.com/geosolutions_it

AVVERTENZE AI SENSI DEL D.Lgs. 196/2003

Le informazioni contenute in questo messaggio di posta elettronica e/o nel/i file/s allegato/i sono da considerarsi strettamente riservate. Il loro utilizzo è consentito esclusivamente al destinatario del messaggio, per le finalità indicate nel messaggio stesso. Qualora riceviate questo messaggio senza esserne il destinatario, Vi preghiamo cortesemente di darcene notizia via e-mail e di procedere alla distruzione del messaggio stesso, cancellandolo dal Vostro sistema. Conservare il messaggio stesso, divulgarlo anche in parte, distribuirlo ad altri soggetti, copiarlo, od utilizzarlo per finalità diverse, costituisce comportamento contrario ai principi dettati dal D.Lgs. 196/2003.

The information in this message and/or attachments, is intended solely for the attention and use of the named addressee(s) and may be confidential or proprietary in nature or covered by the provisions of privacy act (Legislative Decree June, 30 2003, no.196 - Italy’s New Data Protection Code).Any use not in accord with its purpose, any disclosure, reproduction, copying, distribution, or either dissemination, either whole or partial, is strictly forbidden except previous formal approval of the named addressee(s). If you are not the intended recipient, please contact immediately the sender by telephone, fax or e-mail and delete the information in this message that has been received in error. The sender does not give any warranty or accept liability as the content, accuracy or completeness of sent messages and accepts no responsibility for changes made after they were sent or for other risks which arise as a result of e-mail transmission, viruses, etc.

Regards,
Simone Giannecchini.
GeoSolutions Director

  • sent from my mobile, apologies for brevity and typos-
7

Me too,

Ian

···

On Wed, Apr 25, 2018 at 3:29 AM, Ben Caradoc-Davies <ben@anonymised.com191…> wrote:

Andrea,

that definitely qualifies as a bug fix. An exception is much preferred over silent truncation.

Merged on master, but was not small and required many changes, also in the UI:
https://github.com/geoserver/geoserver/pull/2859/commits/51b17298fdcc3c2f63c89d421dfee01ff124764d

Now what, in terms of backport… is this a bug fix or a new feature? It’s kind of both :slight_smile:

Cheers
Andrea

==

GeoServer Professional Services from the experts! Visit http://goo.gl/it488V for more information.

Ing. Andrea Aime
@geowolf
Technical Lead

GeoSolutions S.A.S.
Via di Montramito 3/A
55054 Massarosa (LU)
phone: +39 0584 962313
fax: +39 0584 1660272
mob: +39 339 8844549

http://www.geo-solutions.it
http://twitter.com/geosolutions_it

AVVERTENZE AI SENSI DEL D.Lgs. 196/2003

Le informazioni contenute in questo messaggio di posta elettronica e/o nel/i file/s allegato/i sono da considerarsi strettamente riservate. Il loro utilizzo è consentito esclusivamente al destinatario del messaggio, per le finalità indicate nel messaggio stesso. Qualora riceviate questo messaggio senza esserne il destinatario, Vi preghiamo cortesemente di darcene notizia via e-mail e di procedere alla distruzione del messaggio stesso, cancellandolo dal Vostro sistema. Conservare il messaggio stesso, divulgarlo anche in parte, distribuirlo ad altri soggetti, copiarlo, od utilizzarlo per finalità diverse, costituisce comportamento contrario ai principi dettati dal D.Lgs. 196/2003.

The information in this message and/or attachments, is intended solely for the attention and use of the named addressee(s) and may be confidential or proprietary in nature or covered by the provisions of privacy act (Legislative Decree June, 30 2003, no.196 - Italy’s New Data Protection Code).Any use not in accord with its purpose, any disclosure, reproduction, copying, distribution, or either dissemination, either whole or partial, is strictly forbidden except previous formal approval of the named addressee(s). If you are not the intended recipient, please contact immediately the sender by telephone, fax or e-mail and delete the information in this message that has been received in error. The sender does not give any warranty or accept liability as the content, accuracy or completeness of sent messages and accepts no responsibility for changes made after they were sent or for other risks which arise as a result of e-mail transmission, viruses, etc.

8

Andrea,

I agree it’s a bug fix, but the reason we differentiate is mostly about stability. Maybe leave it a bit longer than a bug-fix backport and not as long as a feature release? Where it is on the scale is subjective, and I’m sure you can make that judgement better than any of us.

Brad

From: Andrea Aime andrea.aime@anonymised.com
Sent: Tuesday, 1 May 2018 3:01 AM
To: Ben Caradoc-Davies ben@anonymised.com
Cc: Geoserver-devel geoserver-devel@lists.sourceforge.net
Subject: Re: [Geoserver-devel] Some funny discovery about time parsing: no more than 100 times!

On Wed, Apr 25, 2018 at 3:29 AM, Ben Caradoc-Davies <ben@anonymised.com.> wrote:

Andrea,

that definitely qualifies as a bug fix. An exception is much preferred over silent truncation.

Merged on master, but was not small and required many changes, also in the UI:

https://github.com/geoserver/geoserver/pull/2859/commits/51b17298fdcc3c2f63c89d421dfee01ff124764d

Now what, in terms of backport… is this a bug fix or a new feature? It’s kind of both :slight_smile:

Cheers

Andrea

==

GeoServer Professional Services from the experts! Visit http://goo.gl/it488V for more information.

Ing. Andrea Aime
@geowolf
Technical Lead

GeoSolutions S.A.S.
Via di Montramito 3/A
55054 Massarosa (LU)
phone: +39 0584 962313
fax: +39 0584 1660272
mob: +39 339 8844549

http://www.geo-solutions.it
http://twitter.com/geosolutions_it

AVVERTENZE AI SENSI DEL D.Lgs. 196/2003

Le informazioni contenute in questo messaggio di posta elettronica e/o nel/i file/s allegato/i sono da considerarsi strettamente riservate. Il loro utilizzo è consentito esclusivamente al destinatario del messaggio, per le finalità indicate nel messaggio stesso. Qualora riceviate questo messaggio senza esserne il destinatario, Vi preghiamo cortesemente di darcene notizia via e-mail e di procedere alla distruzione del messaggio stesso, cancellandolo dal Vostro sistema. Conservare il messaggio stesso, divulgarlo anche in parte, distribuirlo ad altri soggetti, copiarlo, od utilizzarlo per finalità diverse, costituisce comportamento contrario ai principi dettati dal D.Lgs. 196/2003.

The information in this message and/or attachments, is intended solely for the attention and use of the named addressee(s) and may be confidential or proprietary in nature or covered by the provisions of privacy act (Legislative Decree June, 30 2003, no.196 - Italy’s New Data Protection Code).Any use not in accord with its purpose, any disclosure, reproduction, copying, distribution, or either dissemination, either whole or partial, is strictly forbidden except previous formal approval of the named addressee(s). If you are not the intended recipient, please contact immediately the sender by telephone, fax or e-mail and delete the information in this message that has been received in error. The sender does not give any warranty or accept liability as the content, accuracy or completeness of sent messages and accepts no responsibility for changes made after they were sent or for other risks which arise as a result of e-mail transmission, viruses, etc.

9

Well,
we are deploying it in a production environment using time on all services (WMS, WMTS, CSW, and wps-download) shortly,
that will be a good test I guess :slight_smile:

Cheers
Andrea

···

On Tue, May 1, 2018 at 8:33 AM, <bradh@anonymised.com.> wrote:

Andrea,

I agree it’s a bug fix, but the reason we differentiate is mostly about stability. Maybe leave it a bit longer than a bug-fix backport and not as long as a feature release? Where it is on the scale is subjective, and I’m sure you can make that judgement better than any of us.

Brad

From: Andrea Aime <andrea.aime@anonymised.com>
Sent: Tuesday, 1 May 2018 3:01 AM
To: Ben Caradoc-Davies <ben@anonymised.com>
Cc: Geoserver-devel <geoserver-devel@anonymised.comsourceforge.net>
Subject: Re: [Geoserver-devel] Some funny discovery about time parsing: no more than 100 times!

On Wed, Apr 25, 2018 at 3:29 AM, Ben Caradoc-Davies <ben@anonymised.com> wrote:

Andrea,

that definitely qualifies as a bug fix. An exception is much preferred over silent truncation.

Merged on master, but was not small and required many changes, also in the UI:

https://github.com/geoserver/geoserver/pull/2859/commits/51b17298fdcc3c2f63c89d421dfee01ff124764d

Now what, in terms of backport… is this a bug fix or a new feature? It’s kind of both :slight_smile:

Cheers

Andrea

==

GeoServer Professional Services from the experts! Visit http://goo.gl/it488V for more information.

Ing. Andrea Aime
@geowolf
Technical Lead

GeoSolutions S.A.S.
Via di Montramito 3/A
55054 Massarosa (LU)
phone: +39 0584 962313
fax: +39 0584 1660272
mob: +39 339 8844549

http://www.geo-solutions.it
http://twitter.com/geosolutions_it

AVVERTENZE AI SENSI DEL D.Lgs. 196/2003

Le informazioni contenute in questo messaggio di posta elettronica e/o nel/i file/s allegato/i sono da considerarsi strettamente riservate. Il loro utilizzo è consentito esclusivamente al destinatario del messaggio, per le finalità indicate nel messaggio stesso. Qualora riceviate questo messaggio senza esserne il destinatario, Vi preghiamo cortesemente di darcene notizia via e-mail e di procedere alla distruzione del messaggio stesso, cancellandolo dal Vostro sistema. Conservare il messaggio stesso, divulgarlo anche in parte, distribuirlo ad altri soggetti, copiarlo, od utilizzarlo per finalità diverse, costituisce comportamento contrario ai principi dettati dal D.Lgs. 196/2003.

The information in this message and/or attachments, is intended solely for the attention and use of the named addressee(s) and may be confidential or proprietary in nature or covered by the provisions of privacy act (Legislative Decree June, 30 2003, no.196 - Italy’s New Data Protection Code).Any use not in accord with its purpose, any disclosure, reproduction, copying, distribution, or either dissemination, either whole or partial, is strictly forbidden except previous formal approval of the named addressee(s). If you are not the intended recipient, please contact immediately the sender by telephone, fax or e-mail and delete the information in this message that has been received in error. The sender does not give any warranty or accept liability as the content, accuracy or completeness of sent messages and accepts no responsibility for changes made after they were sent or for other risks which arise as a result of e-mail transmission, viruses, etc.

–

Regards,

Andrea Aime

==
GeoServer Professional Services from the experts! Visit http://goo.gl/it488V for more information.

Ing. Andrea Aime
@geowolf
Technical Lead

GeoSolutions S.A.S.
Via di Montramito 3/A
55054 Massarosa (LU)
phone: +39 0584 962313
fax: +39 0584 1660272
mob: +39 339 8844549

http://www.geo-solutions.it
http://twitter.com/geosolutions_it

AVVERTENZE AI SENSI DEL D.Lgs. 196/2003

Le informazioni contenute in questo messaggio di posta elettronica e/o nel/i file/s allegato/i sono da considerarsi strettamente riservate. Il loro utilizzo è consentito esclusivamente al destinatario del messaggio, per le finalità indicate nel messaggio stesso. Qualora riceviate questo messaggio senza esserne il destinatario, Vi preghiamo cortesemente di darcene notizia via e-mail e di procedere alla distruzione del messaggio stesso, cancellandolo dal Vostro sistema. Conservare il messaggio stesso, divulgarlo anche in parte, distribuirlo ad altri soggetti, copiarlo, od utilizzarlo per finalità diverse, costituisce comportamento contrario ai principi dettati dal D.Lgs. 196/2003.

The information in this message and/or attachments, is intended solely for the attention and use of the named addressee(s) and may be confidential or proprietary in nature or covered by the provisions of privacy act (Legislative Decree June, 30 2003, no.196 - Italy’s New Data Protection Code).Any use not in accord with its purpose, any disclosure, reproduction, copying, distribution, or either dissemination, either whole or partial, is strictly forbidden except previous formal approval of the named addressee(s). If you are not the intended recipient, please contact immediately the sender by telephone, fax or e-mail and delete the information in this message that has been received in error. The sender does not give any warranty or accept liability as the content, accuracy or completeness of sent messages and accepts no responsibility for changes made after they were sent or for other risks which arise as a result of e-mail transmission, viruses, etc.