trying to mount swift as ufs and struck here. can you suggest what wrong?
> swift list k -p demo
>alluxio fs mount /demo swift://k/demo
ThriftIOException(message:Ufs path /demo does not exist)
> user.log
2016-03-09 10:40:44,031 ERROR logger.type (AlluxioShell.java:run) - Error runnin                                                                               g mount /demo swift://k/demo
java.io.IOException: ThriftIOException(message:Ufs path /demo does not exist)
    at alluxio.AbstractClient.retryRPC(AbstractClient.java:326)
    at alluxio.client.file.FileSystemMasterClient.mount(FileSystemMasterClie                                                                               nt.java:311)
    at alluxio.client.file.BaseFileSystem.mount(BaseFileSystem.java:224)
    at alluxio.client.file.BaseFileSystem.mount(BaseFileSystem.java:215)
    at alluxio.shell.command.MountCommand.run(MountCommand.java:55)
    at alluxio.shell.AlluxioShell.run(AlluxioShell.java:182)
    at alluxio.shell.AlluxioShell.main(AlluxioShell.java:66)
Caused by: ThriftIOException(message:Ufs path /demo does not exist)
    at alluxio.thrift.FileSystemMasterClientService$mount_result$mount_resul                                                                               tStandardScheme.read(FileSystemMasterClientService.java:13195)
    at alluxio.thrift.FileSystemMasterClientService$mount_result$mount_resul                                                                               tStandardScheme.read(FileSystemMasterClientService.java:13172)
    at alluxio.thrift.FileSystemMasterClientService$mount_result.read(FileSy                                                                               stemMasterClientService.java:13114)
    at org.apache.thrift.TServiceClient.receiveBase(TServiceClient.java:86)
    at alluxio.thrift.FileSystemMasterClientService$Client.recv_mount(FileSy                                                                               stemMasterClientService.java:547)
    at alluxio.thrift.FileSystemMasterClientService$Client.mount(FileSystemM                                                                               asterClientService.java:533)
    at alluxio.client.file.FileSystemMasterClient$13.call(FileSystemMasterCl                                                                               ient.java:314)
    at alluxio.client.file.FileSystemMasterClient$13.call(FileSystemMasterCl                                                                               ient.java:311)
    at alluxio.AbstractClient.retryRPC(AbstractClient.java:322
>swift object server throwing error with 404 & looking path "//demo" instead "/demo"
 "swift object server HEAD /sdd/337/AUTH_53d214c2812d4e47b4a354205cab917b/k//demo
Mar  9 10:41:36 r09r08u15 swift: allow user with role(s) swiftoperator as account admin (txn: tx2bd3e1e95cf146c385e39-0056e04430) (client_ip: 10.30.22.169)
Mar  9 10:41:36 r09r08u15 swift: 10.30.22.169 10.30.22.169 09/Mar/2016/15/41/36 HEAD /v1/AUTH_53d214c2812d4e47b4a354205cab917b/k//demo HTTP/1.0 404 - Apache-HttpClient/4.4%20%28Java%201.5%20minimum%3B%20Java/1.7.0_79%29 97546838078b4046... - - - tx2bd3e1e95cf146c385e39-0056e04430 - 0.0180 - - 1457538096.44