Hi All,

WSUS Sync is getting failed on our Upstream server for the first time it tries to sync daily on schedule, again it succeeds without any intervention. please find the below details

Wsyncmgr.log

sync: SMS synchronizing categories, processed 0 out of 273 items (0%) 
sync: SMS synchronizing categories, processed 273 out of 273 items (100%) 
sync: SMS synchronizing categories, processed 273 out of 273 items (100%) 
sync: SMS synchronizing updates 
sync: SMS synchronizing updates, processed 0 out of 1 items (0%) 
Synchronizing update 0fe4758a-4463-4797-b786-88082b360a39 - Definition Update for Microsoft Endpoint Protection - KB2461484 (Definition 1.203.310.0) 
sync: SMS synchronizing updates, processed 1 out of 1 items (100%) 
sync: SMS performing cleanup 
Sync failed: The operation has timed out. Source: Microsoft.UpdateServices.Internal.DatabaseAccess.ApiRemotingCompressionProxy.GetWebResponse 
STATMSG: ID=6703 SEV=E LEV=M SOURCE="SMS Server" COMP="SMS_WSUS_SYNC_MANAGER" SYS=CONTOSO.net SITE=CAS PID=8352 TID=6928 GMTDATE=Fri Jul 24 05:06:09.441 2015 ISTR0="Microsoft.UpdateServices.Internal.DatabaseAccess.ApiRemotingCompressionProxy.GetWebResponse" ISTR1="The operation has timed out" ISTR2="" ISTR3="" ISTR4="" ISTR5="" ISTR6="" ISTR7="" ISTR8="" ISTR9="" NUMATTRS=0 
Sync failed. Will retry in 60 minutes 
Setting sync alert to active state on site CAS 
Updated 13 items in SMS database, new update source content version is 2742 
Sync time: 0d00h06m09s 
Sending sync notification to child site(s): 1PR 
SQL Replication type has not been set for D:\Program Files\Microsoft Configuration Manager\inboxes\wsyncmgr.box\outbox\CAS.SYN, replicating to (1PR), inbox: D:\Program Files\Microsoft Configuration Manager\inboxes\replmgr.box 
Wakeup for a polling cycle 
Starting Sync 
Performing sync on retry schedule 
Read SUPs from SCF for CONTOSO.net 
Found 1 SUPs 
Found active SUP CONTOSO.NET from SCF File. 
STATMSG: ID=6701 SEV=I LEV=M SOURCE="SMS Server" COMP="SMS_WSUS_SYNC_MANAGER" SYS=CONTOSO.net SITE=CAS PID=8352 TID=6928 GMTDATE=Fri Jul 24 06:06:09.203 2015 ISTR0="" ISTR1="" ISTR2="" ISTR3="" ISTR4="" ISTR5="" ISTR6="" ISTR7="" ISTR8="" ISTR9="" NUMATTRS=0 
Synchronizing WSUS server CONTOSO.net 
STATMSG: ID=6704 SEV=I LEV=M SOURCE="SMS Server" COMP="SMS_WSUS_SYNC_MANAGER" SYS=CONTOSO.net SITE=CAS PID=8352 TID=6928 GMTDATE=Fri Jul 24 06:06:10.225 2015 ISTR0="" ISTR1="" ISTR2="" ISTR3="" ISTR4="" ISTR5="" ISTR6="" ISTR7="" ISTR8="" ISTR9="" NUMATTRS=0 
Synchronizing WSUS server CONTOSO.net ... 
sync: Starting WSUS synchronization 
Done synchronizing WSUS Server CONTOSO.net 
Sleeping 2 more minutes for WSUS server sync results to become available 
Set content version of update source {3C8C5A5C-3EEC-44FD-9654-421F428E7347} for site CAS to 2742 
Synchronizing SMS database with WSUS server CONTOSO.net 
STATMSG: ID=6705 SEV=I LEV=M SOURCE="SMS Server" COMP="SMS_WSUS_SYNC_MANAGER" SYS=CONTOSO.net SITE=CAS PID=8352 TID=6928 GMTDATE=Fri Jul 24 06:08:16.288 2015 ISTR0="" ISTR1="" ISTR2="" ISTR3="" ISTR4="" ISTR5="" ISTR6="" ISTR7="" ISTR8="" ISTR9="" NUMATTRS=0 
Synchronizing SMS database with WSUS server CONTOSO.net ... 
sync: Starting SMS database synchronization 

could not find any error in WCM,WSUSCtrl.logs.

please find the event log.

Log Name:      Application
Source:        SMS Server
Date:          7/24/2015 12:06:09 AM
Event ID:      6703
Task Category: SMS_WSUS_SYNC_MANAGER
Level:         Error
Keywords:      Classic
User:          N/A
Computer:      contoso.net
Description:
On 7/24/2015 12:06:09 AM, component SMS_WSUS_SYNC_MANAGER on computer contoso.net reported:   WSUS Synchronization failed.
 Message: The operation has timed out.
 Source: Microsoft.UpdateServices.Internal.DatabaseAccess.ApiRemotingCompressionProxy.GetWebResponse.
  The operating system reported error 2148734217:
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <System>
    <Provider Name="SMS Server" />
    <EventID Qualifiers="49152">6703</EventID>
    <Level>2</Level>
    <Task>73</Task>
    <Keywords>0x80000000000000</Keywords>
    <TimeCreated SystemTime="2015-07-24T05:06:09.000000000Z" />
    <EventRecordID>170971</EventRecordID>
    <Channel>Application</Channel>
    <Computer>contoso.net</Computer>
    <Security />
  </System>
  <EventData>
    <Data>Microsoft.UpdateServices.Internal.DatabaseAccess.ApiRemotingCompressionProxy.GetWebResponse</Data>
    <Data>The operation has timed out</Data>
    <Data>
    </Data>
    <Data>
    </Data>
     <Data>On 7/24/2015 12:06:09 AM, component SMS_WSUS_SYNC_MANAGER on computer contoso.net reported:  </Data>
    <Data> The operating system reported error 2148734217: </Data>
  </EventData>
</Event>

"Sync failed: The operation has timed out. Source: Microsoft.UpdateServices.Internal.DatabaseAccess.ApiRemotingCompressionProxy.GetWebResponse"

I'd say you've got some kind of network issue or security software/appliance in place that only intermittently kicks in. Maybe you've got a proxy configured or a network security device that requires authentication?

HI Prajwal,

this is happening every day and every schedule for the first time it fails, for second try it is successful automatically.

no proxy enabled.

Yes, I know this is an old post, but Im trying to clean them up. Did you solve this problem, if so what was the solution?

same here Jones, we did not find any solution.

same here Jones, we did not find any solution.

IMO this will be related to your SQL timeout issue in your other post. IMO if you fix SQL then both problems will be resolved.