I hope I can explain this well.
This is a problem that we've had for some time, but I was really working to ensure it wasn't an issue on my end before I submitted this to TDP. I do believe it may be on the TDP product end. Essentially we use TDP 4.0, but I've seen the problem as well on earlier versions. We have our queries that connect using an I-Series ODBC connection to an AS400 using DB2 SQL. All of our queries use this. With that being said, I've noticed quite frequently that long running queries (those that take possibly an hour or more to run) have issues specifically when running in automation that are essentially giving up the connection to the query and continuing to run on the machine. Therefore, when I come in in the morning I notice that the little toad icon is still up and the automation task is still running and I have to forcibly end the task and then attempt to rerun. (It will work usually when rerunning and this issue isn't present every time the query runs, just on and off, most notably when CPU is higher and query times are running even longer than normal) I have the ability to check the query running on the AS400 and when I do this on these queries in automation that give up and essentially keep running, I notice that the query is no longer running on the AS400. Therefore, I'm suspecting that somehow the query either times out or is killed some how on the TDP automation end, but throws no errors back. The reason I believe this, is I also have the ability to terminate connections to queries on our AS400 which means that I can stop a query on the AS400 side. If this was the case, or connections get lost, I always throw back an error on the automation that the connection has been lost, which is great and tells me that it will error for connections lost on the AS400 end. This is why I assume its something with the TDP product. I'd like to see if the wonderful TDP support folks have seen this issue before and if not, what information I may be able to provide to help this issue to be researched. Also, I'd love to hear if anyone else has experienced anything similar.
Hope to hear from you soon.
Chad