Sync Error: Request already pending

[balu14u]

Hi,

I get the below error during sync:

Failure communicating with remote server. Please try again later.
Debug message: Request already pending

Exception:

com.zimbra.common.service.ServiceException: system failure: Synchronization of folder '/Backup' failed
ExceptionId:mid=3:1262917279718:5ced1195af51ebb4
Code:service.FAILURE
at com.zimbra.common.service.ServiceException.FAILURE (ServiceException.java:253)
at com.zimbra.cs.datasource.ImapSync.syncFailed(ImapS ync.java:298)
at com.zimbra.cs.datasource.ImapSync.syncMessages(Ima pSync.java:260)
at com.zimbra.cs.datasource.ImapSync.syncFolders(Imap Sync.java:195)
at com.zimbra.cs.datasource.ImapSync.importData(ImapS ync.java:152)
at com.zimbra.cs.offline.OfflineImport.importData(Off lineImport.java:88)
at com.zimbra.cs.datasource.DataSourceManager.importD ata(DataSourceManager.java:157)
at com.zimbra.cs.mailbox.LocalMailbox.importData(Loca lMailbox.java:417)
at com.zimbra.cs.mailbox.LocalMailbox.syncAllLocalDat aSources(LocalMailbox.java:389)
at com.zimbra.cs.mailbox.LocalMailbox.sync(LocalMailb ox.java:431)
at com.zimbra.cs.mailbox.LocalMailbox.syncOnTimer(Loc alMailbox.java:361)
at com.zimbra.cs.mailbox.DesktopMailbox$1.run(Desktop Mailbox.java:437)
at java.util.TimerThread.mainLoop(Unknown Source)
at java.util.TimerThread.run(Unknown Source)
Caused by: java.lang.IllegalStateException: Request already pending
at com.zimbra.cs.mailclient.imap.ImapConnection.sendR equest(ImapConnection.java:462)
at com.zimbra.cs.mailclient.imap.ImapRequest.send(Ima pRequest.java:77)
at com.zimbra.cs.mailclient.imap.ImapRequest.sendChec kStatus(ImapRequest.java:81)
at com.zimbra.cs.mailclient.imap.ImapConnection.doSel ectOrExamine(ImapConnection.java:187)
at com.zimbra.cs.mailclient.imap.ImapConnection.selec t(ImapConnection.java:174)
at com.zimbra.cs.datasource.RemoteFolder.select(Remot eFolder.java:236)
at com.zimbra.cs.datasource.ImapFolderSync.checkUidVa lidity(ImapFolderSync.java:724)
at com.zimbra.cs.datasource.ImapFolderSync.syncMessag es(ImapFolderSync.java:205)
at com.zimbra.cs.datasource.ImapSync.syncMessages(Ima pSync.java:257)
... 11 more

Please let me know if there is any resolution for this ?

Balu