1860180 - SUP 2.1.3 RBS client timing out at 4 minutes during sync

• SUP 2.1.3, using Replication Base Sync (RBS) on iOS(IPad) clients, seeing client connections  timing out.
• If the total sync time was less than 4 minutes the sync completed successfully. If the total sync time was greater than 4 minutes the sync failed, with a timeout error occurring in the application.

The IPad device log showed the following error:

Feb 25 12:16:54 BSC-Mac1s-iPa NM PE Portal_Device[3489] < Warning> : -[GeneralSupConnection onGetSyncStatusChange:] [Line 387] SYNC_STATE_ERROR
Feb 25 12:16:54 BSC-Mac1s-iPa NM PE Portal_Device[3489] < Warning> : =================================================
Feb 25 12:16:54 BSC-Mac1s-iPa NM PE Portal_Device[3489] < Warning> : onHttpCommunicationError: errorCode = 201
Feb 25 12:16:54 BSC-Mac1s-iPa NM PE Portal_Device[3489] < Warning> : =================================================
Feb 25 12:16:54 BSC-Mac1s-iPa NM PE Portal_Device[3489] < Warning> : -[GeneralSupConnection onConnectSuccess] [Line 334] FAILED: SUp Operation SUPPersistenceException: SUPPersistenceException from synchronize: -- SUPSynchronizeException: Sync failed: -1305 (MOBILINK_COMMUNICATIONS_ERROR) %1:201 %2:128 %3:0Details:
StreamErrorCode = 201
StreamErrorMessage = 128

A network sniffer trace showed:
1751     2013-03-01 22:35:42.241438000 10.252.9.193 132.189.224.107 TCP 248 52375 > powerexchange [PSH, ACK] Seq=4474 Ack=768 Win=131328 Len=182 TSval=181983925 TSecr=98746873
1769     2013-03-01 22:35:42.440497000 132.189.224.107 10.252.9.193 TCP 66 powerexchange > 52375 [ACK] Seq=768 Ack=4656 Win=65536 Len=0 TSval=98746905 TSecr=181983925

2 minute Delay from Mobilink to return the data to client
153977 2013-03-01 22:37:43.009378000 132.189.224.107 10.252.9.193 TCP 354 powerexchange > 52375 [PSH, ACK] Seq=768 Ack=4656 Win=65536 Len=288 TSval=98758962 TSecr=181983925

Mobilink tries  5 times to send the data then closes the TCP connection (TCP RST) 
154173 2013-03-01 22:37:43.326442000 132.189.224.107 10.252.9.193 TCP 354 [TCP Retransmission] powerexchange > 52375 [PSH, ACK] Seq=768 Ack=4656 Win=65536 Len=288 TSval=98758994 TSecr=181983925
154334 2013-03-01 22:37:43.966480000 132.189.224.107 10.252.9.193 TCP 354 [TCP Retransmission] powerexchange > 52375 [PSH, ACK] Seq=768 Ack=4656 Win=65536 Len=288 TSval=98759058 TSecr=181983925
157445 2013-03-01 22:37:45.246611000 132.189.224.107 10.252.9.193 TCP 354 [TCP Retransmission] powerexchange > 52375 [PSH, ACK] Seq=768 Ack=4656 Win=65536 Len=288 TSval=98759186 TSecr=181983925
162144 2013-03-01 22:37:47.805771000 132.189.224.107 10.252.9.193 TCP 354 [TCP Retransmission] powerexchange > 52375 [PSH, ACK] Seq=768 Ack=4656 Win=65536 Len=288 TSval=98759442 TSecr=181983925
162463 2013-03-01 22:37:52.926022000 132.189.224.107 10.252.9.193 TCP 354 [TCP Retransmission] powerexchange > 52375 [PSH, ACK] Seq=768 Ack=4656 Win=65536 Len=288 TSval=98759954 TSecr=181983925
163429 2013-03-01 22:38:03.171549000 132.189.224.107 10.252.9.193 TCP 54 powerexchange > 52375 [RST, ACK] Seq=1056 Ack=4656 Win=0 Len=0

• The above network trace shows that the server(Mobilink) took about 2 minutes to respond to client request, but by that time the client connection was terminated. Mobilink server retries and then gives up

Sybase Unwired Platform 2.1.3

iOS client device

KBA , MOB-SUP , Sybase Unwired Platform , MOB-SUP-RT-ML , SUP Runtime Mobilink , Problem