A scheduled Update Signature scheduled task may remain in the Queued state. The following information can be seen in the Update Manage logs:

"C:\Documents and Settings\All Users\Application Data\VMware\VMware Update Manager\Logs\YYYY_MM_DD.jetty.log.HHMMSSSSS"

YYYY-MM-DD 14:53:39.171::INFO:  Shutdown hook executing
YYYY-MM-DD 14:53:39.171::INFO:  Graceful shutdown SelectChannelConnector@0.0.0.0:9084
YYYY-MM-DD 14:53:39.171::INFO:  Graceful shutdown org.mortbay.jetty.handler.ContextHandler@a084f8{/vci/hostupdates,file:/D:/VMware/VMware%20Update%20Manager/Data/}
YYYY-MM-DD 14:53:39.171::INFO:  Graceful shutdown org.mortbay.jetty.handler.ContextHandler@79ed7f{/vci/downloads,file:/C:/Program%20Files/VMware/Infrastructure/Update%20Manager/docroot/vci/downloads/}
YYYY-MM-DD 14:53:39.187::WARN:  EXCEPTION 
java.nio.channels.ClosedChannelException
	at sun.nio.ch.ServerSocketChannelImpl.accept(Unknown Source)
	at org.mortbay.jetty.nio.SelectChannelConnector$1.acceptChannel(SelectChannelConnector.java:75)
	at org.mortbay.io.nio.SelectorManager$SelectSet.doSelect(SelectorManager.java:475)
	at org.mortbay.io.nio.SelectorManager.doSelect(SelectorManager.java:166)
	at org.mortbay.jetty.nio.SelectChannelConnector.accept(SelectChannelConnector.java:124)
	at org.mortbay.jetty.AbstractConnector$Acceptor.run(AbstractConnector.java:515)
	at org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:450)

"C:\Documents and Settings\All Users\Application Data\VMware\VMware Update Manager\Logs\vmware-vci-log4cpp.log"

[YYYY-MM-DD 14:56:17:000 'VcIntegrityImpl' 2780 INFO]  [vcIntegrity, 853] Starting VMware Update Manager Release 1
[YYYY-MM-DD 14:56:17:578 'patchStore' 2780 WARN]  [patchStore, 235] Error retrieving Windows Metadata state from the db, defaulting to clean. No record - VCIDB ERROR: Row with key 2 not found in table VCI_TEXTFILES
[YYYY-MM-DD 14:56:17:578 'patchStore' 2780 WARN]  [patchStore, 252] Error retrieving Auxillary Windows Metadata state from the db, defaulting to clean. No record - VCIDB ERROR: Row with key 5 not found in table VCI_TEXTFILES
[YYYY-MM-DD 14:56:17:578 'patchStore' 2780 WARN]  [patchStore, 271] Error retrieving Windows Binaries ISO state from the db, defaulting to cleanNo record - VCIDB ERROR: Row with key 4 not found in table VCI_TEXTFILES
[YYYY-MM-DD 14:56:19:171 'VcIntegrityImpl' 2780 ERROR]  [vcIntegrity, 920] vmodl.fault.HostNotReachable
[YYYY-MM-DD 14:56:19:171 'VcIntegrityPlugin' 2780 INFO]  [plugin, 198] VcIntegrityPlugin Start

"C:\Documents and Settings\All Users\Application Data\VMware\VMware Update Manager\Logs\vmware-vci-5.log"

[YYYY-MM-DD 14:56:16.156 'Ufa' 2780 info] Http Service started: TCPServerSocket(listen=127.0.0.1:8084)
[YYYY-MM-DD 14:56:16.171 'Ufa' 2780 info] Soap started
[YYYY-MM-DD 14:56:16.171 'Ufa' 2780 info] Plugin started
[YYYY-MM-DD 14:56:16.171 'App' 2780 info] [plugin,119] UfaClientPlugin Start
[YYYY-MM-DD 14:56:16.171 'App' 2780 info] [plugin,123] UfaSlavePlugin Start
[YYYY-MM-DD 14:56:16.171 'App' 2780 info] [shutdownMgr,25] Ufa shutdown manager registered.
[YYYY-MM-DD 14:56:17.593 'VcIntegrity' 2780 info] Connecting to host 192.168.1.10 on port 443 using protocol https
[YYYY-MM-DD 14:56:19.171 'App' 2780 error] [rpcConnectionWrapper,200] Failed to establish Vim connection to https://192.168.1.10:443/. Vmacore::Exception: No connection could be made because the target machine actively refused it. 
[YYYY-MM-DD 14:56:19.171 'App' 2780 info] [serviceWin32,448] vmware-ufad-vci service started

The database connection has dropped out, and cannot be re-established.

Restart the VMware Update Manager Service (vmware-ufad-vci) service.