Hi,

After testing that scenario it seems to me that it does not revert the
entity but rather concatenate the previous value to the new one:

After changing the value to:
http://indiatoday.intoday.in/site/story/upa-paralysed-decision-making-process-collapse-in-credibility-and-stall-in-governance

A few minute later it becames:
http://indiatoday.intoday.in/site/Story/143334/Cover
Story/http://indiatoday.intoday.in/site/story/upa-paralysed-decision-making-process-collapse-in-credibility-and-stall-in-governance

Let me know if you have experienced a similar behavior.

On Tue, Jul 5, 2011 at 7:08 PM, Tirrell Payton <tpay...@bt-software.net> wrote:
> Hello Johan,
>
> I just reproduced the issue from within the datastore admin tool (no
> queued tasks, nothing external operating on this record)
>
> 1.  Go to this record:
> https://appengine.google.com/datastore/edit?app_id=streamingservicesplatform&namespace=&version_id=338.351619451003591871&key=ahlzdHJlYW1pbmdzZXJ2aWNlc3BsYXRmb3JtcjALEgpTU1BBcnRpY2xlIiBjNGJmMDA5Mzk4Yjk0NTFjMTY2YzFiMmQwMWJkZjE5ZAw
> 2.  The Link is this:  http://indiatoday.intoday.in/site/Story/143334/Cover
> Story/http://indiatoday.intoday.in/site/story/upa-paralysed-decision-
> making-process-collapse-in-credibility-and-stall-in-governance
>  Change it to this:
> http://indiatoday.intoday.in/site/story/upa-paralysed-decision-making-process-collapse-in-credibility-and-stall-in-governance
> 3.  Click 'save entity'
> 4.  Wait 5 minutes.
> 5.  Entity reverts.
>
> Any insight or additional items you would like me to try would be
> appreciated.
>
>
> On Jul 5, 2:44 am, Johan Euphrosine <pro...@google.com> wrote:
>> Hi Tirrel,
>>
>> What happened when you tried to read the record just after writing, 1
>> minute later, 2 minute later, etc until 5 minutes ?
>>
>> Are you sure that your application code doesn't interact with the
>> datastore on the same record elsewhere, on a request, tasksqueue or a
>> cron job ?
>>
>> We are currently monitoring your application, please try to reproduce
>> this issue so we can a closer look at what is happening.
>>
>> Thanks in advance.
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> On Tue, Jul 5, 2011 at 10:10 AM, Tirrell Payton <tpay...@bt-software.net> 
>> wrote:
>> > Indeed but thats the best way to be sure:
>> > 1.  See behavior in code.  Troubleshoot code.  Same result.
>> > 2.  Test behavior with remote api.  Update record via remote api.
>> > Same result.
>> > 3.  Test behavior directly in datastore admin.  Same result.
>>
>> > Testing in the datastore admin quickly gets us through 'check your
>> > code' 'check the cache' 'can we see a code snippet', etc.
>> > Moreover, it ensures the good people at google are able to replicate
>> > the issue under the same circumstances as laid out at the beginning.
>>
>> > On Jul 4, 11:06 pm, "Brandon Wirtz" <drak...@digerat.com> wrote:
>> >> I view the DataStore Administrator as a "in case of emergency break glass
>> >> and slit your wrists" tool.
>>
>> >> -----Original Message-----
>> >> From: google-appengine@googlegroups.com
>>
>> >> [mailto:google-appengine@googlegroups.com] On Behalf Of Tirrell Payton
>> >> Sent: Monday, July 04, 2011 9:40 PM
>> >> To: Google App Engine
>> >> Subject: [google-appengine] Re: Database opaquely rolling back changes
>>
>> >> There is no code.  I am doing this in the datastore administrator.
>> >> Select a record, update the field, click 'save entity'
>>
>> >> On Jul 4, 9:09 pm, Robert Kluin <robert.kl...@gmail.com> wrote:
>> >> > I'm guessing you've got a cache issue too. Either the changes you
>> >> > think are getting committed aren't (and your returning / caching) non
>> >> > committed data, or your seeing old cached data served.
>>
>> >> > Could you show us the actual code you use to save and fetch the results?
>>
>> >> > Robert
>> >> > On Jul 4, 2011 1:04 PM, "Tirrell Payton" <tpay...@bt-software.net>
>> >> > wrote:> APPID: streamingservicesplatform.appspot.com
>>
>> >> > > Database opaquely rolls back changes.
>> >> > > To reproduce:
>>
>> >> > > Bring up record:
>>
>> >> > ahlzdHJlYW1pbmdzZXJ2aWNlc3BsYXRmb3JtcjALEgpTU1BBcnRpY2xlIiBjNGJmMDA5Mz
>> >> > k4Yjk 0NTFjMTY2YzFiMmQwMWJkZjE5ZAw
>>
>> >> > > Change the link from this:
>>
>> >> >http://indiatoday.intoday.in/site/Story/143334/Cover>
>> >> > Story/http://indiatoday.intoday.in/site/story/upa-paralysed-decision-
>> >> > > making-process-collapse-in-credibility-and-stall-in-governance
>>
>> >> > > to this:
>>
>> >> >http://indiatoday.intoday.in/site/story/upa-paralysed-decision-making...
>>
>> >> > > Wait 5 minutes.
>>
>> >> > > Bring up record:
>>
>> >> > ahlzdHJlYW1pbmdzZXJ2aWNlc3BsYXRmb3JtcjALEgpTU1BBcnRpY2xlIiBjNGJmMDA5Mz
>> >> > k4Yjk 0NTFjMTY2YzFiMmQwMWJkZjE5ZAw
>>
>> >> > > Expected result, changes to the link are still there.
>> >> > > Actual result, database has 'rolled back' to the previous version of
>> >> > > this record.
>>
>> >> > > --
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>>
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>> --
>> Johan Euphrosine (proppy)
>> Developer Programs Engineer
>> Google Developer Relations
>
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-- 
Johan Euphrosine (proppy)
Developer Programs Engineer
Google Developer Relations

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