时间跳变导致cosbench异常退出

测试ceph对象存储时，Cosbench报错退出：Terminated

Cosbench日志报错如下：

2018-03-16 12:54:40,169 [ERROR] [AbstractAgent] - unexpected exception
java.lang.ArrayIndexOutOfBoundsException
2018-03-16 12:54:40,169 [ERROR] [AbstractAgent] - unexpected exception
java.lang.ArrayIndexOutOfBoundsException
2018-03-16 12:54:40,174 [ERROR] [AbstractAgent] - unexpected exception
java.lang.ArrayIndexOutOfBoundsException
2018-03-16 12:54:40,175 [ERROR] [MissionHandler] - detected workers [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194, 195, 196, 197, 198, 199, 200] have encountered errors
2018-03-16 12:54:40,179 [INFO] [MissionHandler] - mission M02D0200D2A has been terminated
2018-03-16 12:54:40,221 [INFO] [PingDriverRunner] - wake up from sleep.
2018-03-16 12:54:40,221 [INFO] [PingDriverRunner] - Trying to ping driver driver1 at http://127.0.0.1:18088/driver with ip=127.0.0.1, port=18088...
2018-03-16 12:54:40,221 [INFO] [PingDriverRunner] - The driver driver1 at http://127.0.0.1:18088/driver is reachable
2018-03-16 12:54:40,221 [INFO] [PingDriverRunner] - begin to sleep for 20 seconds.
2018-03-16 12:54:43,428 [INFO] [StageRunner] - successfully queried all tasks in stage s1-put 8KB data with 200 workers
2018-03-16 12:54:43,433 [ERROR] [AbstractCommandTasklet] - driver report error: HTTP 409 - no mission handler
2018-03-16 12:54:43,433 [ERROR] [StageRunner] - detected tasks [t1] have encountered errors
2018-03-16 12:54:43,433 [INFO] [StageRunner] - begin to terminate stage s1-put 8KB data with 200 workers
2018-03-16 12:54:43,593 [INFO] [StageRunner] - stage s1-put 8KB data with 200 workers has been terminated
2018-03-16 12:54:44,360 [INFO] [PingDriverRunner] - wake up from sleep.
2018-03-16 12:54:44,360 [INFO] [PingDriverRunner] - Trying to ping driver driver1 at http://127.0.0.1:18088/driver with ip=127.0.0.1, port=18088...
2018-03-16 12:54:44,360 [INFO] [PingDriverRunner] - The driver driver1 at http://127.0.0.1:18088/driver is reachable
2018-03-16 12:54:44,361 [INFO] [PingDriverRunner] - begin to sleep for 20 seconds.
2018-03-16 12:54:44,640 [ERROR] [WorkloadProcessor] - detected stage s1-put 8KB data with 200 workers encountered error
2018-03-16 12:54:44,641 [INFO] [WorkloadProcessor] - begin to terminate workload w101
2018-03-16 12:54:44,695 [INFO] [SimpleWorkloadArchiver] - workload w101 has been successfully archived
2018-03-16 12:54:44,696 [INFO] [WorkloadProcessor] - successfully terminated workload w101
2018-03-16 12:55:00,222 [INFO] [PingDriverRunner] - wake up from sleep.
2018-03-16 12:55:00,222 [INFO] [PingDriverRunner] - Trying to ping driver driver1 at http://127.0.0.1:18088/driver with ip=127.0.0.1, port=18088...
2018-03-16 12:55:00,223 [INFO] [PingDriverRunner] - The driver driver1 at http://127.0.0.1:18088/driver is reachable

开始怀疑是ceph的rgw出问题导致的，排查日志发现没问题。

刚好另一个同事说这个环境时间一致跳变，就怀疑是时间跳变导致Cosbench自己异常，禁用系统时间同步工具后，测试很长时间都没问题，然后手动将时间往历史方向调整

了60s，Cosbench的测试随机报了上述异常退出！

至此，问题确认，不是ceph而是Cosbench的锅！！！