Hi there
We first saw many of these symptoms with v16R6 using the new network layer. Before that the only previous 4D version we'd used for a long time was v13.6 which didn't have the new network layer. Anyway, using v16R6 with the new network layer, we did get mass disconnections occurring and also seeing the Admin window changing the Accept/Reject by itself. So after a mass disconnection, new connections couldn't be made. At least that's what we initially thought. It turned out that if you waited long enough (several minutes), connections would again be allowed. The network layer somehow "resetting" itself, maybe. Don't know. We also noticed that at the point of these mass disconnections there would usually be an entry in the Windows Application event log. The log entry had one single "japanese" looking character. In the end, 4D figured out a possible cause through some diagnostic logs they got from another customer. The reference for the issue was ACI0098997. It was fixed in v17 HF4 and obviously also fixed in v17.1. We had already begun our work to begin moving our client base from v16R6 onto v17, so we expedited this transition more quickly to take advantage of this and other fixes (and improvements) available in v17. Whilst the issue was fixed by 4D, the actual problem is caused by 4D Server receiving an incomplete set of packets from one or more 4D Remotes. This could be due to any number of potential network or client machine issues. In summary, the 4D main thread was being blocked waiting for these incomplete packets to arrive and would eventually time out and resume its process (meanwhile all connected clients had already disconnected). As I understand it, the change made by 4D was to build in a very short delay waiting on incomplete incoming packet sets. I don't know whether ACI0098997 got implemented in v16.x as we never used the v16.x strand. Since implementing v17.1, these new network layer disconnection issues have stopped, AFAIK. Best regards Keith White Synergist Express Ltd, UK. 4697775 ********************************************************************** 4D Internet Users Group (4D iNUG) Archive: http://lists.4d.com/archives.html Options: https://lists.4d.com/mailman/options/4d_tech Unsub: mailto:4d_tech-unsubscr...@lists.4d.com **********************************************************************
