我有OpsCenter 5.1.1和datastax enterprise 4.5.1 3节点集群。我正在为S3编写备份 - 正在编写备份，但我在agent.log中看到了一些错误，如下所示：
INFO [Thread-1194] 2015-04-23 16:05:23,672 Cleaning up destination 16ed3891f1504461acf54d12567b96a9 for backup 5b940fb2-d7de-40f1-98aa-a81c1620c341 expiration date: 2015-01-23T16:05:23.000Z
INFO [Thread-1194] 2015-04-23 16:05:23,757 Cleaning up destination 16ed3891f1504461acf54d12567b96a9, removing tags: ()
ERROR [Thread-1194] 2015-04-23 16:05:23,932 #<UncheckedExecutionException com.google.common.util.concurrent.UncheckedExecutionException: org.jclouds.rest.AuthorizationException: Access Denied>
ERROR [Thread-1194] 2015-04-23 16:05:23,945 com.google.common.util.concurrent.UncheckedExecutionException: org.jclouds.rest.AuthorizationException: Access Denied
我之前发过关于IAM policy for the backup-user的帖子，我想我需要添加某种类型的更多权限，或者可能在5.1.1中有所改变。有没有人有建议？