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An error occurred while synchronizing edits

BerhanuMekonen

I tested the offline data collection-Collector for ArcGIS using a future hosted on AGOL, it works well but, a big but, am challenged in synchronizing, it move up to 50% and then fail with error massage -
"An error occurred while synchronizing edits"
Would you please help?

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RussRoberts

Are you using iOS or Android version of the Collector?

Thanks
Russ

NicholasLaMar

Hi Russ,

I am having the same problem. I have a map with 10 points and photo attachments I've collected and I am trying to sync it back to AGOL. Everytime I try and sync I get the following generic message "Sync Error - An error occurred while synchronizing edits". Any ideas???

Ryan

RebeccaHorsburgh

I too am having this issue. With simple point features and photo attachments. I have 2 separate devices both having the exact same issue. The feature service is hosted on AGOL, I have ensured editor tracking is turned off. We're using Collector for Android on a Sony tablet. One device has 7 features stuck on it and the other has 27. We really need to get them off.

RussRoberts

The upcoming update to the Android app has enhancements to support larger syncs and will help reduce the chances you are seeing these errors. Did you have multiple attachments associated with features with the data collected?

Russ

RebeccaHorsburgh

Thanks for your advice Russ. Some features had multiple attachments but not many. As mentioned in another feed i have instructed our users to try and sync back after every 5 features collected if they have phone service. I'm pretty sure this is the issue in regards to the device being an Android and a number of features being collected all with photo attachments.

We eagerly await the Android update.

RachelWilliams

I am having this error currently as well. I have 21 points with no attachments and am using Android. It will get up to 50% and then stop. Sometimes it will show as synced, but the features don't show up online and if I close and re-open Collector it shows I still need to sync the 21 points.

RussRoberts

Hey Rachel,

Can you try this: First make a backup of the map having the issue. You can copy this data to another folder or locally to your computer. Then delete the client_delta geodatabase and the syncgdb_request folder. After you have deleted these items restart the app and try to sync again.

Russ

RachelWilliams

So, to clarify, you want me to back up on the map on AGOL? Where do I find

the client_delta GDB and syncgdb_request folders?

Rachel Williams

GIS Analyst

Utah Division of Oil, Gas and Mining

JanicePeal

I have found the answer to my sync issue and thanks everyone for your input. Turns out, the inability to sync was due to an issue with our IIS 7 web server and arcgis web adaptor settings. In IIS, if you go to your web adaptor name, then the WebAdaptor folder, check out the UploadReadAheadSize setting. The default value was 41942, and ESRI told me to up it to 20 million. This solved the issue!

RobertRayner1

Funny, I went through a similar situation of chasing bugs and re-publishing different services last year which was finally resolved with the same solution Janice.

Hopefully people find these posts and save time, seems like it should be an earlier troubleshooting step in the ESRI ArcGIS Collector handbook!

Below is the step by step solution:

These are the instructions that ESRI provided on changing the uploadreadaheadsize:
Launch “Internet Information Services (IIS) Manager”
Select the site that you are hosting your web application under it.
In the Features section, double click “Configuration Editor”
Under “Section” select: system.webServer ,then select serverRuntime
5. Modify the “uploadReadAheadSize” section to be like 20MB (the value there is in Bytes)
6. Click Apply this is happening as during renegotiation step;
Hopefully this helps others!

And this is the similar thread: Offline works in ios but not android

MarcelRamirez1

Hi Russ please I nedd your help in Collector : I've collected and I am trying to sync it back to AGOL. Everytime I try and sync I get the following generic message "Sync Error - An error occurred while synchronizing edits".

I'm using IOS

Thanks

RussRoberts

Do you have a large amount of data that you are trying to sync back to the service?

Are you using Hosted Feature Services from ArcGIS Online or are you using ArcGIS Server Feature Services?

Can you capture the traffic using fiddler to see any error messages come back from the service?

Here is a link to a post on how to configure this:

https://community.esri.com/external-link.jspa?url=http%3A%2F%2Fblogs.esri.com%2Fesri%2Fsupportcenter%2F2011%2F12%2F06%2Fcon…

Russ

KevinJohnsonZA

Thanks

This post really helped!!

HeatherStanton

I just wanted to add that changing the uploadReadAheadSize worked for us, too.

GideonDalrymple

I've increased mine to 500mb and still came back with the same error. I have like 66 new edits with about 40 attachments. Could the number of attachments be the issue? All are photos.

GideonDalrymple

Also is there a way to also copy the attachments along with the database so that they also can be appended?

Kylie

Gideon Dalrymple‌ Could you please start a new question so that we can best help you? This thread is rather old.

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