swarm problem - not kicking off

can anybody help me understang log message from Swarm it is not starting for lightbuild
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23:54:58: [PingRemoteHost] Failed to ping RENDER-01 with RENDER-01
23:54:58: [PingRemoteHost] Exception details: An exception occurred during a Ping request.
23:54:58: [PingCoordinator] Determined that we couldn’t ping the coordinator
23:54:58: [PingCoordinator] Coordinator ping failed
23:55:00: [GetUniqueHandle] Communication with the coordinator failed, job distribution will be disabled until the connection is established
23:55:00: [GetUniqueHandle] Exception: System.Net.Sockets.SocketException (0x80004005): No such host is known
Server stack trace:
at System.Net.Dns.GetAddrInfo(String name)
at System.Net.Dns.InternalGetHostByName(String hostName, Boolean includeIPv6)
at System.Net.Dns.GetHostAddresses(String hostNameOrAddress)
at System.Runtime.Remoting.Channels.RemoteConnection.CreateNewSocket()
at System.Runtime.Remoting.Channels.RemoteConnection.GetSocket()
at System.Runtime.Remoting.Channels.SocketCache.GetSocket(String machinePortAndSid, Boolean openNew)
at System.Runtime.Remoting.Channels.Tcp.TcpClientTransportSink.SendRequestWithRetry(IMessage msg, ITransportHeaders requestHeaders, Stream requestStream)
at System.Runtime.Remoting.Channels.Tcp.TcpClientTransportSink.ProcessMessage(IMessage msg, ITransportHeaders requestHeaders, Stream requestStream, ITransportHeaders& responseHeaders, Stream& responseStream)
at System.Runtime.Remoting.Channels.BinaryClientFormatterSink.SyncProcessMessage(IMessage msg)
Exception rethrown at [0]:
at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
at SwarmCoordinatorInterface.ISwarmCoordinator.GetUniqueHandle()
at Agent.Agent.GetUniqueHandle()
23:55:00: [PingCoordinator] Determined that we couldn’t ping the coordinator
23:55:00: [PingCoordinator] CoordinatorResponding is false
23:55:00: [Interface:TryOpenConnection] Local connection established
23:55:00: [Job] Accepted Job 1DE04742-4E5BE32B-FA3E5CAF-6FC30D36
23:55:01: [PingRemoteHost] Failed to ping RENDER-01 with RENDER-01
23:55:01: [PingRemoteHost] Exception details: An exception occurred during a Ping request.
23:55:01: [PingCoordinator] Determined that we couldn’t ping the coordinator
23:55:01: [PingCoordinator] CoordinatorResponding is false
23:55:01: [MaintainConnections] Maintaining Connection (6F7099C4)
23:55:01: [MaintainConnections] Local connection alive (6F7099C4)
23:55:01: [Maintain Jobs] Job is AGENT_JOB_UNSPECIFIED
23:55:01: [PingCoordinator] Determined that we couldn’t ping the coordinator
23:55:01: [PingCoordinator] CoordinatorResponding is false
23:55:01: [MaintainConnections] Maintaining Connection (6F7099C4)
23:55:01: [MaintainConnections] Local connection alive (6F7099C4)
23:55:01: [Maintain Jobs] Job is AGENT_JOB_UNSPECIFIED
23:55:02: [PingCoordinator] Determined that we couldn’t ping the coordinator
23:55:02: [PingCoordinator] CoordinatorResponding is false
23:55:02: [MaintainConnections] Maintaining Connection (6F7099C4)
23:55:02: [MaintainConnections] Local connection alive (6F7099C4)
23:55:02: [Maintain Jobs] Job is AGENT_JOB_UNSPECIFIED
23:55:02: [PingCoordinator] Determined that we couldn’t ping the coordinator
23:55:02: [PingCoordinator] CoordinatorResponding is false
23:55:02: [MaintainConnections] Maintaining Connection (6F7099C4)
23:55:02: [MaintainConnections] Local connection alive (6F7099C4)
23:55:02: [Maintain Jobs] Job is AGENT_JOB_UNSPECIFIED
23:55:03: [PingCoordinator] Determined that we couldn’t ping the coordinator
23:55:03: [PingCoordinator] CoordinatorResponding is false
23:55:03: [MaintainConnections] Maintaining Connection (6F7099C4)
23:55:03: [MaintainConnections] Local connection alive (6F7099C4)
23:55:03: [Maintain Jobs] Job is AGENT_JOB_UNSPECIFIED
23:55:03: [PingCoordinator] Determined that we couldn’t ping the coordinator
23:55:03: [PingCoordinator] CoordinatorResponding is false
23:55:03: [MaintainConnections] Maintaining Connection (6F7099C4)
23:55:03: [MaintainConnections] Local connection alive (6F7099C4)
23:55:03: [Maintain Jobs] Job is AGENT_JOB_UNSPECIFIED
23:55:04: [PingCoordinator] Determined that we couldn’t ping the coordinator
23:55:04: [PingCoordinator] CoordinatorResponding is false
23:55:04: [MaintainConnections] Maintaining Connection (6F7099C4)
23:55:04: [MaintainConnections] Local connection alive (6F7099C4)
23:55:04: [Maintain Jobs] Job is AGENT_JOB_UNSPECIFIED
23:55:04: [PingCoordinator] Determined that we couldn’t ping the coordinator
23:55:04: [PingCoordinator] CoordinatorResponding is false
23:55:04: [MaintainConnections] Maintaining Connection (6F7099C4)
23:55:04: [MaintainConnections] Local connection alive (6F7099C4)
23:55:04: [Maintain Jobs] Job is AGENT_JOB_UNSPECIFIED
23:55:04: [Interface:OpenChannel] Error: System.IO.IOException: The process cannot access the file ‘C:\Users\HyperWorks\AppData\Local\UnrealEngine\4.13\Saved\Swarm\SwarmCache\AgentStagingArea\8487AD2E5DBA413C81373D29B2915895.94D78E974FD5777204CE109C212DC3CD.mtrlgz’ because it is being used by another process.
at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy, Boolean useLongPath, Boolean checkHost)
at System.IO.FileStream…ctor(String path, FileMode mode, FileAccess access, FileShare share)
at NSwarm.FSwarmInterface.OpenChannel(String ChannelName, EChannelFlags ChannelFlags)
23:55:05: [PingCoordinator] Determined that we couldn’t ping the coordinator
23:55:05: [PingCoordinator] CoordinatorResponding is false
23:55:05: [MaintainConnections] Maintaining Connection (6F7099C4)
23:55:05: [MaintainConnections] Local connection alive (6F7099C4)
23:55:05: [Maintain Jobs] Job is AGENT_JOB_UNSPECIFIED
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