The trick to troubleshooting Swift is to remember that it has a proxy tier and a storage backend tier. The proxy is essentially the API layer to Swift, and it is the place to start looking for errors in Swift. As mentioned earlier, Swift-proxy does not have its own log file. Its logs will show up in /var/log/messages. If things look good in the proxy's logs, then take a look at the storage backend, and see whether there are any errors in the Swift storage logs.