我正在使用 cygnus 将数据存储在 MySQL 数据库和 Cosmos 中。将数据存储在 cosmos 中可以正常工作,但是当存储在 MySQL 中时,特别是使用属性“cygnusagent.sinks.mysql-sink.attr_persistence = column”而不是“cygnusagent.sinks.mysql-sink.attr_persistence = row”时,数据不是存储,我在水槽日志中遇到一些错误。
由于使用列属性时需要预先创建表(更多信息:https ://github.com/telefonicaid/fiware-cygnus/blob/master/doc/design/OrionMySQLSink.md#important-notes-regarding-the -persistence-mode),我创建表:
CREATE TABLE def_servpath_sensorreading4_sensorreading(systemid int,value float, sensorid int, nodeid int);
DESCRIBE def_servpath_sensorreading4_sensorreading(systemid int,value float, sensorid int, nodeid int);
mysql> DESCRIBE def_servpath_sensorreading4_sensorreading;
+----------+---------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+----------+---------+------+-----+---------+-------+
| systemid | int(11) | YES | | NULL | |
| value | float | YES | | NULL | |
| sensorid | int(11) | YES | | NULL | |
| nodeid | int(11) | YES | | NULL | |
+----------+---------+------+-----+---------+-------+
4 rows in set (0.00 sec)
这是水槽日志:
11 Aug 2015 11:40:31,977 INFO [SinkRunner-PollingRunner-DefaultSinkProcessor] (com.telefonica.iot.cygnus.sinks.OrionMySQLSink.persist:240) - [mysql-sink] Persisting data at OrionMySQLSink. Database: def_serv, Table: def_servpath_sensorreading3_sensorreading, Timestamp: 2015-08-11T08:40:31.969, Data (attrs): {systemid=1, value=29.2, sensorid=2, nodeid=1}, (metadata): {sensorid_md=[], systemid_md=[], value_md=[], nodeid_md=[]}
11 Aug 2015 11:40:31,978 WARN [SinkRunner-PollingRunner-DefaultSinkProcessor] (com.telefonica.iot.cygnus.sinks.OrionSink.process:182) - Bad context data (Unknown column 'systemid' in 'field list')
11 Aug 2015 11:40:31,978 INFO [SinkRunner-PollingRunner-DefaultSinkProcessor] (com.telefonica.iot.cygnus.sinks.OrionSink.process:193) - Finishing transaction (1439278647-655-0000000005)
11 Aug 2015 11:40:32,369 INFO [SinkRunner-PollingRunner-DefaultSinkProcessor] (com.telefonica.iot.cygnus.sinks.OrionHDFSSink.persist:356) - [hdfs-sink] Persisting data at OrionHDFSSink. HDFS file (def_serv/def_servpath/sensorreading3_sensorreading/sensorreading3_sensorreading.txt), Data ({"recvTime":"2015-08-11T08:40:31.969Z","nodeid":"1", "nodeid_md":[],"sensorid":"2", "sensorid_md":[],"systemid":"1", "systemid_md":[],"value":"29.2", "value_md":[]})
11 Aug 2015 11:40:32,858 INFO [SinkRunner-PollingRunner-DefaultSinkProcessor] (com.telefonica.iot.cygnus.sinks.OrionSink.process:193) - Finishing transaction (1439278647-655-0000000005)
我在哪里收到以下错误:
错误的上下文数据(“字段列表”中的未知列“systemid”)
我是否需要在与元数据相关的表中创建更多列?我是否正确创建了表格?
提前致谢。