A concurrency control error occurred within model

Hello,
I’m facing error "A concurrency control error occurred within model “aa0573b2-9d81-43de-9865-f567b135116a” when internet is disconnected and connected again.

Here consider tab 1 & tab 2 as participant 1 & participant 2
Here are the steps to regenerate the issue -

  1. Open ace editor same example on 2 browser tabs.

  2. Disconnect the internet

  3. After the internet lost type the below code at line no.2 in tab 1
    This is first tab
    This is the first tab contents

  4. Type the below code at line no.2 in tab 2
    This is second tab
    This is the second tab contents

After inserting above code connect the internet again.

Then you will see the tab 1 contents as -

Error message in tab 1 console -

The model with id ‘aa0573b2-9d81-43de-9865-f567b135116a’ was forcefully closed by the server: invalid reference event

Tab 2nd content as -

Error message in the tab 2 console -

ERROR 18:48:02.512 A concurrency control error occurred within model “aa0573b2-9d81-43de-9865-f567b135116a”.
Error: Acknowledgement did not meet expected context version of 360: 362

After that If I type something in tab 1 or tab 2, it doesn’t get reflected in other tabs.

1 Like

Anyone able to resolve this issue, I am getting this error
The model with id “xyz” was forcefully closed by the server: invalid reference event

Apologies for the long delay in response. We will be testing this in the next week or so. There have been several improvements in the reference system over the last few releases. If we confirm the bug, we will add a link to the git hub issue here.