We have about 20 processes running on the Orchestrator for several months now, but we are experiencing a disturbing issue for a couple of weeks now.
What we know and have checked so far:
The processes involving the Get IMAP Mail Message or Move IMAP Mail Message activities sometimes encounter an issue, the others (without these particular activities) don’t.
When such an issue is encountered, the involved processed keeps seemingly running, but doesn’t do anything at all. It seems it is stucked inside the mail activity, since the log message supposed to be displayed just after the activity never shows up. There’s no error message in most cases, and I have to manually kill the process, otherwise it could last for days.
A process can run normally for several minutes (5, 15, 30…) and suddenly will encounter the bug. From here, it will be stuck forever. The amount of minutes before encountering the bug seems random.
For instance, a process can successfully get mail messages from mailbox A, then will do nothing for ages for mailbox B. If then I kill and relaunch the same process, it can successfully get mail messages from both mailboxes, without any changes from me.
In a few cases, the process will catch an exception stating “Unable to read data from the transport connecton: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.”
The IMAP activities use the 993 port and the right server, there’s no change about it compared to the previous weeks when everything was working fine. I wanted to test the process with Exchange activities instead of IMAP, but couldn’t achieve it unfortunately…
Plus, we’ve checked the firewall, the server connection and server load, and nothing suspicious here…
Has anyone here experienced the same issue or would have a clue about what to do or what to check?
We don’t know if it could be an Orchestrator/UiPath issue, or an intern server problem. The weird thing is that a process can start working just fine, and then suddenly and randomly may start doing nothing without any log or error thrown.
Thanks for the help!