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

Symptom

  • 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


Read more...

Environment

Sybase Unwired Platform 2.1.3

iOS client device

Product

Sybase Unwired Platform 2.1

Keywords

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

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