# OPC-UA - Reconnect to remote server fails **URL:** \ **Category:** Ignition\ **Created:** [October 17, 2016, 11:45am UTC](https://forum.inductiveautomation.com/t/opc-ua-reconnect-to-remote-server-fails/12243 "2016-10-17T11:45:41Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![chi](https://avatars.discourse-cdn.com/v4/letter/c/0ea827/32.png) [@chi](https://forum.inductiveautomation.com/u/chi)\ **Post date:** [October 17, 2016, 11:45am UTC](https://forum.inductiveautomation.com/t/opc-ua-reconnect-to-remote-server-fails/12243/1 "2016-10-17T11:45:41Z")
There is already a similar topic [in this post](https://inductiveautomation.com/forum/viewtopic.php?f=94&t=15190), but my problem still happens in 7.8.4, so i started a new topic. When my remote OPC-UA server restarts, Ignition fails to reconnect automatically. When i edit the connection settings in the gateway configuration, the connection is working again. The reconnect itself seems to work, but something called TransferSubscriptionRequest seems to fail. Other clients reconnect in this situation without problems. The full log is attached to this post. [quote]INFO | jvm 6 | 2016/10/17 13:30:02 | DEBUG [ClientChannelManager] [13:30:02,053]: Reconnect succeeded, channelId=1142659188 INFO | jvm 6 | 2016/10/17 13:30:02 | DEBUG [ClientSessionManager] [13:30:02,055]: (re)ActivateSession failed: UaServiceFaultException: status=Bad\_SessionIdInvalid, message=The session id is not valid. INFO | jvm 6 | 2016/10/17 13:30:02 | java.util.concurrent.CompletionException: UaServiceFaultException: status=Bad\_SessionIdInvalid, message=The session id is not valid. INFO | jvm 6 | 2016/10/17 13:30:02 | at java.util.concurrent.CompletableFuture.encodeRelay(Unknown Source) INFO | jvm 6 | 2016/10/17 13:30:02 | at java.util.concurrent.CompletableFuture.completeRelay(Unknown Source) INFO | jvm 6 | 2016/10/17 13:30:02 | at java.util.concurrent.CompletableFuture.uniRelay(Unknown Source) INFO | jvm 6 | 2016/10/17 13:30:02 | at java.util.concurrent.CompletableFuture$UniRelay.tryFire(Unknown Source) INFO | jvm 6 | 2016/10/17 13:30:02 | at java.util.concurrent.CompletableFuture.postComplete(Unknown Source) INFO | jvm 6 | 2016/10/17 13:30:02 | at java.util.concurrent.CompletableFuture.completeExceptionally(Unknown Source) INFO | jvm 6 | 2016/10/17 13:30:02 | at org.eclipse.milo.opcua.stack.client.UaTcpStackClient.receiveResponse(UaTcpStackClient.java:283) INFO | jvm 6 | 2016/10/17 13:30:02 | at org.eclipse.milo.opcua.stack.client.UaTcpStackClient.lambda$sendRequest$3(UaTcpStackClient.java:145) INFO | jvm 6 | 2016/10/17 13:30:02 | at java.util.concurrent.CompletableFuture.uniWhenComplete(Unknown Source) INFO | jvm 6 | 2016/10/17 13:30:02 | at java.util.concurrent.CompletableFuture$UniWhenComplete.tryFire(Unknown Source) INFO | jvm 6 | 2016/10/17 13:30:02 | at java.util.concurrent.CompletableFuture.postComplete(Unknown Source) INFO | jvm 6 | 2016/10/17 13:30:02 | at java.util.concurrent.CompletableFuture.complete(Unknown Source) INFO | jvm 6 | 2016/10/17 13:30:02 | at org.eclipse.milo.opcua.stack.client.handlers.UaTcpClientMessageHandler.lambda$null$19(UaTcpClientMessageHandler.java:528) INFO | jvm 6 | 2016/10/17 13:30:02 | at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) INFO | jvm 6 | 2016/10/17 13:30:02 | at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) INFO | jvm 6 | 2016/10/17 13:30:02 | at java.lang.Thread.run(Unknown Source) INFO | jvm 6 | 2016/10/17 13:30:02 | Caused by: UaServiceFaultException: status=Bad\_SessionIdInvalid, message=The session id is not valid. INFO | jvm 6 | 2016/10/17 13:30:02 | … 10 more INFO | jvm 6 | 2016/10/17 13:30:02 | DEBUG [ClientSessionManager] [13:30:02,064]: Sending CreateSessionRequest… INFO | jvm 6 | 2016/10/17 13:30:02 | DEBUG [UaTcpClientMessageHandler] [13:30:02,110]: OpenSecureChannel timeout scheduled for +5s INFO | jvm 6 | 2016/10/17 13:30:02 | DEBUG [UaTcpClientMessageHandler] [13:30:02,113]: OpenSecureChannel timeout scheduled for +5s INFO | jvm 6 | 2016/10/17 13:30:02 | DEBUG [UaTcpClientMessageHandler] [13:30:02,114]: Sent OpenSecureChannelRequest (Issue, id=0, currentToken=-1, previousToken=-1). INFO | jvm 6 | 2016/10/17 13:30:02 | DEBUG [UaTcpClientMessageHandler] [13:30:02,126]: OpenSecureChannel timeout canceled INFO | jvm 6 | 2016/10/17 13:30:02 | DEBUG [UaTcpClientMessageHandler] [13:30:02,132]: Sent OpenSecureChannelRequest (Issue, id=0, currentToken=-1, previousToken=-1). INFO | jvm 6 | 2016/10/17 13:30:02 | DEBUG [ClientSessionManager] [13:30:02,135]: Session created: NodeId{ns=1, id=1} INFO | jvm 6 | 2016/10/17 13:30:02 | DEBUG [UaTcpClientMessageHandler] [13:30:02,138]: OpenSecureChannel timeout canceled INFO | jvm 6 | 2016/10/17 13:30:02 | DEBUG [UaTcpClientMessageHandler] [13:30:02,142]: Received OpenSecureChannelResponse. INFO | jvm 6 | 2016/10/17 13:30:02 | DEBUG [UaTcpClientMessageHandler] [13:30:02,142]: SecureChannel id=1142659191, currentTokenId=1, previousTokenId=-1, lifetime=3600000ms, createdAt=DateTime{utcTime=131211774021381154, javaDate=Mon Oct 17 13:30:02 CEST 2016} INFO | jvm 6 | 2016/10/17 13:30:02 | DEBUG [UaTcpClientMessageHandler] [13:30:02,145]: 0 message(s) queued before handshake completed; sending now. INFO | jvm 6 | 2016/10/17 13:30:02 | DEBUG [UaTcpClientMessageHandler] [13:30:02,147]: Received OpenSecureChannelResponse. INFO | jvm 6 | 2016/10/17 13:30:02 | DEBUG [UaTcpClientMessageHandler] [13:30:02,148]: SecureChannel id=1142659190, currentTokenId=1, previousTokenId=-1, lifetime=3600000ms, createdAt=DateTime{utcTime=131211774021224898, javaDate=Mon Oct 17 13:30:02 CEST 2016} INFO | jvm 6 | 2016/10/17 13:30:02 | DEBUG [UaTcpClientMessageHandler] [13:30:02,149]: 0 message(s) queued before handshake completed; sending now. INFO | jvm 6 | 2016/10/17 13:30:02 | DEBUG [ClientSessionManager] [13:30:02,157]: Sending ActivateSessionRequest, secureChannelId=1142659188, channel=[id: 0x5e775f5a, L:/10.224.27.128:58161 - R:/10.224.27.128:4840]… INFO | jvm 6 | 2016/10/17 13:30:02 | DEBUG [ClientChannelManager] [13:30:02,164]: Channel bootstrap succeeded: localAddress=/10.224.27.128:58163, remoteAddress=/10.224.27.128:4840 INFO | jvm 6 | 2016/10/17 13:30:02 | DEBUG [ClientSessionManager] [13:30:02,167]: Session activated: NodeId{ns=1, id=1} INFO | jvm 6 | 2016/10/17 13:30:02 | DEBUG [ClientSessionManager] [13:30:02,167]: subscriptionCount=1, transferNeeded=true INFO | jvm 6 | 2016/10/17 13:30:02 | DEBUG [ClientSessionManager] [13:30:02,167]: Sending TransferSubscriptionsRequest… INFO | jvm 6 | 2016/10/17 13:30:02 | ERROR [UaTcpClientMessageHandler] [13:30:02,170]: Received error message: ErrorMessage{error=StatusCode{name=Bad\_NotFound, value=0x803E0000, quality=bad}, reason=null} [/quote] ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [October 17, 2016, 2:15pm UTC](https://forum.inductiveautomation.com/t/opc-ua-reconnect-to-remote-server-fails/12243/2 "2016-10-17T14:15:09Z")
What server are you connected to? The TransferSubscription service is allowed to fail as part of the reconnect process… but only in certain ways. ---
**Author:** ![chi](https://avatars.discourse-cdn.com/v4/letter/c/0ea827/32.png) [@chi](https://forum.inductiveautomation.com/u/chi)\ **Post date:** [October 17, 2016, 3:02pm UTC](https://forum.inductiveautomation.com/t/opc-ua-reconnect-to-remote-server-fails/12243/3 "2016-10-17T15:02:28Z")
This is the OPC server from [Tani](http://www.tanindustrie.de/en/Opc.php) ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [October 17, 2016, 3:12pm UTC](https://forum.inductiveautomation.com/t/opc-ua-reconnect-to-remote-server-fails/12243/4 "2016-10-17T15:12:27Z")
Well what’s happening is that the server is ignoring the TransferSubscriptionRequest all together (or erroring internally, or something) which is why the request ends up timing out. This is non-conformant behavior. It’s not required that the server support this request, but it is required that it responds (with, say… Bad\_ServiceUnsupported). So what’s happening here is that the client connection state machine, always making an effort to not lose any data, is assuming something went wrong with the connection so it reconnects, still preserving hope that the subscription transfer will succeed, because the server has not indicated that the service is not supported or the subscriptions no longer exists to be transferred. ---
**Author:** ![chi](https://avatars.discourse-cdn.com/v4/letter/c/0ea827/32.png) [@chi](https://forum.inductiveautomation.com/u/chi)\ **Post date:** [October 17, 2016, 3:32pm UTC](https://forum.inductiveautomation.com/t/opc-ua-reconnect-to-remote-server-fails/12243/5 "2016-10-17T15:32:34Z")
Thank you. I will contact Tani support tomorrow. I hope they are as fast as you in answering ![:thumb_left:](https://us1.discourse-cdn.com/inductiveautomation/original/1X/e26afb081ddde6df016df6ee49159cf56aaca688.gif ":thumb\_left:") ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [October 17, 2016, 3:41pm UTC](https://forum.inductiveautomation.com/t/opc-ua-reconnect-to-remote-server-fails/12243/6 "2016-10-17T15:41:41Z")
FWIW we’ve seen this with another customer. It was with something built on National Instruments OPC-UA SDK, which itself may be built on top of one of the toolkits from the well known vendors… not sure. If you can find out, I’m curious what toolkit this Tani server is built on. ---
**Author:** ![chi](https://avatars.discourse-cdn.com/v4/letter/c/0ea827/32.png) [@chi](https://forum.inductiveautomation.com/u/chi)\ **Post date:** [December 13, 2016, 1:39pm UTC](https://forum.inductiveautomation.com/t/opc-ua-reconnect-to-remote-server-fails/12243/7 "2016-12-13T13:39:36Z")
FYI: The problem ist fixed in the current TANI version 1.12. There is now the Exception `INFO [OpcUaConnection[TaniOPC] ] [14:35:29,938]: Subscription transfer failed, id=196609, status=StatusCode{name=Bad_NotImplemented, value=0x80400000, quality=bad} ` After that, the reconnect is successfull. ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [December 13, 2016, 2:59pm UTC](https://forum.inductiveautomation.com/t/opc-ua-reconnect-to-remote-server-fails/12243/8 "2016-12-13T14:59:57Z")
[quote=“chi”]FYI: The problem ist fixed in the current TANI version 1.12. There is now the Exception `INFO [OpcUaConnection[TaniOPC] ] [14:35:29,938]: Subscription transfer failed, id=196609, status=StatusCode{name=Bad_NotImplemented, value=0x80400000, quality=bad} ` After that, the reconnect is successfull.[/quote] Technically they should return Bad\_ServiceUnsupported, but the client accepts Bad\_NotImplemented, Bad\_NotSupported, and Bad\_OutOfService as well ![:thumb_left:](https://us1.discourse-cdn.com/inductiveautomation/original/1X/e26afb081ddde6df016df6ee49159cf56aaca688.gif ":thumb\_left:") ---
**Author:** ![guganathan.r](https://avatars.discourse-cdn.com/v4/letter/g/8dc957/32.png) [@guganathan.r](https://forum.inductiveautomation.com/u/guganathan.r)\ **Post date:** [December 5, 2020, 5:40am UTC](https://forum.inductiveautomation.com/t/opc-ua-reconnect-to-remote-server-fails/12243/9 "2020-12-05T05:40:37Z")
@Kevin.Herron I’m running on 8.0.15 version. I have the same issue, reconnect to remote server fails. If i edit the connection, the connection is re-established. Error message: [remote=NOC-OWPP-SCADA/10.2.1.136:4862] errorMessage=ErrorMessage{error=StatusCode{name=Bad\_ServiceUnsupported, value=0x800B0000, quality=bad}, reason=null} ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [December 5, 2020, 1:54pm UTC](https://forum.inductiveautomation.com/t/opc-ua-reconnect-to-remote-server-fails/12243/10 "2020-12-05T13:54:31Z")
Ignition 8.1.1 contains a workaround for these incorrectly implemented servers that should get the reconnect to happen. ---
**Author:** ![guganathan.r](https://avatars.discourse-cdn.com/v4/letter/g/8dc957/32.png) [@guganathan.r](https://forum.inductiveautomation.com/u/guganathan.r)\ **Post date:** [December 16, 2020, 1:30pm UTC](https://forum.inductiveautomation.com/t/opc-ua-reconnect-to-remote-server-fails/12243/11 "2020-12-16T13:30:41Z")
Thanks @Kevin.Herron We upgraded to 8.1.1 and it works.