从 6.0.3 升级到 6.0.5 后无法备份，出现以下错误。根据代理选项卡，代理是健康的。回滚到 6.0.3 后再次工作。任何帮助深表感谢。
2016-11-20 16:50:15,952 [opscenterd] WARN: Marking request 'Backup' (adc0b98e-0533-497d-8e3b-5316834ed9b1) a\
s failed: Backup of keyspaces [sponte] failed for the following destinations: snapshot (MainThread)
2016-11-20 16:50:15,952 [sponte] ERROR: Backup of keyspaces [sponte] failed: Backup of keyspaces [sponte] fai\
led for the following destinations: snapshot (MainThread)
2016-11-20 16:50:15,953 [opscenterd] ERROR: Unhandled error in Deferred: Backup of keyspaces [sponte] failed:\
Backup of keyspaces [sponte] failed for the following destinations: snapshot (MainThread)
2016-11-20 16:50:16,159 [sponte] INFO: agent_config items: {'cassandra_user': 'cassandra', 'jmx_pass': '****\
*', 'metrics_ignored_keyspaces': 'system, system_traces, system_auth, system_distributed, dse_auth, OpsCenter\
', 'cassandra_log_location': '/var/log/cassandra', 'rollups60_ttl': 604800, 'cassandra_install_location': '',\
'cassandra_pass': '*****', 'monitored_cassandra_port': 9042, 'monitored_thrift_port': 9160, 'rollups86400_tt\
l': 0, 'jmx_user': '', 'jmx_port': 7199, 'storage_keyspace': 'OpsCenter', 'jmx_operations_pool_size': 4, 'met\
rics_ignored_solr_cores': '', 'rollups300_ttl': 2419200, 'use_ssl': False, 'metrics_ignored_column_families':\
'', 'restore_req_update_period': 1, 'rollups7200_ttl': 31536000, 'api_port': '61621', 'thrift_port': 9160, '\
monitored_cassandra_user': 'cassandra', 'max_pending_repairs': 5, 'cassandra_port': 9042, 'monitored_cassandr\
a_pass': '*****', 'ec2_metadata_api_host': '169.254.169.254', 'backup_staging_dir': '', 'metrics_enabled': Tr\
ue} (MainThread)
2016-11-20 16:50:16,193 [opscenterd] ERROR: Unhandled error in Deferred: Resource not found.
File "/sponte/opscenter-6.0.5/lib/py/twisted/internet/defer.py", line 1124, in _inlineCallbacks
result = g.send(result)
File "build/jython/Lib/site-packages/opscenterd/WebServer.py", line 1446, in RequestStatusController
(MainThread)