Error occurs in getting logon session

[yamakawa]

When I run three logon session acquisition processes in parallel, I sometimes get an InternalServerError.

I have checked the log when the error occurs, and the following error message is output.

Collection was modified; enumeration operation may not execute.

Based on the message, I suspect that the cause of the error is that the logon session is deleted by another process when retrieving the logon session, and thus the logon session cannot be retrieved correctly.

What can I do to avoid this error?

[oleg.feoktistov]

Hi,

It looks like sometimes you stumble on session expiration while doing GET requests. Thus, collection of object representations is formed but enumeration cannot be executed because some of the sessions expired and hence deleted from the collection. That's just my suspicion, but I'd advise to submit a support case and share rest api logs with support engineers.

Thanks,
Oleg

[yamakawa]

Dear Oleg

Thanks for the reply.

The event hasn't recurred since then, so I'm going to keep an eye on it for now.
I'll contact support again when it happens again.