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我正在使用配置有STH. 当 Cygnus 接收到任何实体的两个或多个更改通知时，它无法将新值发送到STH. 它记录错误collection already exists并且不保存更改。在第一个通知中，一切顺利。

我已经执行了以下步骤：

  • 在 Orion 中向任何实体创建通知
  • 更改实体属性

第一次，Cygnus 工作正常，所以我再次更改属性，Cygnus 显示错误。

如何解决这个问题呢？

完整的信息是：

* 如文档中所述，我在容器 docker 中使用 cygnus。

* 我用mongodb-ip:27017真实的 ip 在这里发帖。

time=2017-03-08T11:51:05.164Z | lvl=ERROR |
corr=53d86140-03f5-11e7-a70e-080027f6529d |
trans=236416c2-776e-4cc0-91dc-29bca203ea2a | srv=red | subsrv=/red/red |
comp=cygnus-ngsi | op=processRollbackedBatches |msg=com.telefonica.iot.cygnus.sinks.NGSISink[394] :
Persistence error. Message: -, Command failed with error -1:
'collection already exists' on server <mongodb-ip>:27017. The full response is
{ "ok" : 0.0, "errmsg" : "collection already exists" }, Stack trace:
 [com.telefonica.iot.cygnus.sinks.NGSISTHSink.persistOne(NGSISTHSink.java:158),
com.telefonica.iot.cygnus.sinks.NGSISTHSink.persistBatch(NGSISTHSink.java:93), 
com.telefonica.iot.cygnus.sinks.NGSISink.processRollbackedBatches(NGSISink.java:387), 
com.telefonica.iot.cygnus.sinks.NGSISink.process(NGSISink.java:370),
org.apache.flume.sink.DefaultSinkProcessor.process(DefaultSinkProcessor.java:68), 
org.apache.flume.SinkRunner$PollingRunner.run(SinkRunner.java:147),
java.lang.Thread.run(Thread.java:745)]
time=2017-03-08T11:51:05.164Z | lvl=INFO | corr=53d86140-03f5-11e7-a70e-080027f6529d | trans=236416c2-776e-4cc0-91dc-29bca203ea2a | srv=red | subsrv=/red/red | comp=cygnus-ngsi | op=doRollbackAgain | msg=com.telefonica.iot.cygnus.sinks.NGSISink[464] : Finishing internal transaction (53d86140-03f5-11e7-a70e-080027f6529d), this was retry #10

我在我的 agent.conf (Cygnus) 中使用的配置是：

cygnus-ngsi.sources = http-source
cygnus-ngsi.sinks = sth-sink
cygnus-ngsi.channels = sth-channel

cygnus-ngsi.sources.http-source.type = org.apache.flume.source.http.HTTPSource
cygnus-ngsi.sources.http-source.channels = sth-channel
cygnus-ngsi.sources.http-source.port = 5050
cygnus-ngsi.sources.http-source.handler = com.telefonica.iot.cygnus.handlers.NGSIRestHandler
cygnus-ngsi.sources.http-source.handler.notification_target = /notify
cygnus-ngsi.sources.http-source.handler.default_service = default
cygnus-ngsi.sources.http-source.handler.default_service_path = /
cygnus-ngsi.sources.http-source.interceptors = ts gi
cygnus-ngsi.sources.http-source.interceptors.ts.type = timestamp
cygnus-ngsi.sources.http-source.interceptors.gi.type = com.telefonica.iot.cygnus.interceptors.NGSIGroupingInterceptor$Builder
cygnus-ngsi.sources.http-source.interceptors.gi.grouping_rules_conf_file = /opt/apache-flume/conf/grouping_rules.conf

cygnus-ngsi.sinks.sth-sink.type = com.telefonica.iot.cygnus.sinks.NGSISTHSink
cygnus-ngsi.sinks.sth-sink.channel = sth-channel
#cygnus-ngsi.sinks.sth-sink.enable_encoding = false
#cygnus-ngsi.sinks.sth-sink.enable_grouping = false
#cygnus-ngsi.sinks.sth-sink.enable_name_mappings = false
#cygnus-ngsi.sinks.sth-sink.enable_lowercase = false
cygnus-ngsi.sinks.sth-sink.data_model = dm-by-entity
cygnus-ngsi.sinks.sth-sink.mongo_hosts = <mongodb-ip>:27017
cygnus-ngsi.sinks.sth-sink.mongo_username =
cygnus-ngsi.sinks.sth-sink.mongo_password =
cygnus-ngsi.sinks.sth-sink.db_prefix = sth_
cygnus-ngsi.sinks.sth-sink.collection_prefix = sth_
cygnus-ngsi.sinks.sth-sink.resolutions = day,hour,minute
#cygnus-ngsi.sinks.sth-sink.batch_size = 1
#cygnus-ngsi.sinks.sth-sink.batch_timeout = 30
#cygnus-ngsi.sinks.sth-sink.batch_ttl = 10
#cygnus-ngsi.sinks.sth-sink.data_expiration = 0
#cygnus-ngsi.sinks.sth-sink.ignore_white_spaces = true


cygnus-ngsi.channels.sth-channel.type = com.telefonica.iot.cygnus.channels.CygnusMemoryChannel
cygnus-ngsi.channels.sth-channel.capacity = 1000
cygnus-ngsi.channels.sth-channel.transactionCapacity = 100

在STH一边，我有以下配置：

var config = {};

// STH server configuration
//--------------------------
config.server = {

  host: '10.0.2.15',

  port: '8666',


  defaultService: 'testservice',


  defaultServicePath: '/testservicepath',


  filterOutEmpty: 'true',

  aggregationBy: ['day', 'hour', 'minute'],

  temporalDir: 'temp'
};

// Database configuration
//------------------------
config.database = {

  dataModel: 'collection-per-entity',
 user: '',

  password: '',

  URI: 'localhost:27017',

  replicaSet: '',

  prefix: 'sth_',


  collectionPrefix: 'sth_',

  poolSize: '5',


  shouldStore: 'both',
  truncation: {


    expireAfterSeconds: '0',
    size: '0',

    max: '0'
  },

  ignoreBlankSpaces: 'true',
  nameMapping: {

    enabled: 'false',

    configFile: './name-mapping.json'
  },

  nameEncoding: 'false'
};

// Logging configuration
//------------------------
config.logging = {
  level: 'info',
  NODE_ENV variable is set to 'development'.

  format: 'pipe',


  proofOfLifeInterval: '60'
};

module.exports = config;
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1 回答 1

2

MongoDB 错误处理基于可能因版本而异的异常消息。

Cygnus 已被编码以检测"code" : 48这些异常消息中的字符串，这意味着集合已经存在并且没有做任何事情。“什么都没做”意味着没有创建集合（因为它已经存在）并且原始异常没有进展。

问题是当 MongoDB 版本返回不包含"code" : 48字符串的消息时。在这种情况下，假设异常不同于“集合已经存在”，因此它会进行。这就是你的情况。

于 2017-03-10T08:08:04.587 回答