组件信息

Sentinel

描述错误

通过Sentinel Dashboard向应用程序添加流控制规则后，应用程序正在将相应的json数据反序列化为[FlowRule] (https://github.com/alibaba/Sentinel/blob/master/sentinel-core/src/main/java/com/alibaba/csp/sentinel/slots/block/flow/FlowRule.java) 在使用对象时出错。

再现行为的步骤：

1.首先，客户端应用程序和Sentinel Dashboard使用相同的Zookeeper

2.使用Arthas工具诊断客户端应用程序。监控com.fasterxml.jackson.databind.ObjectMapper#readValue方法的执行。

watch com.fasterxml.jackson.databind.ObjectMapper readValue '{params, returnObj, throwExp}' -x 2

3.在Sentinel仪表板上添加流量控制规则。

4.观察Arthas的输出以查看错误消息

ts=2019-04-18 15:51:09; [cost=0.324774ms] result=@ArrayList[ @Object[][ @String[{"app":"xxx","gmtModified":1555572942154,"resource":"com.xx.yy.ZZZZService:function(com.xx.yy.Ttt)","ip":"172.18.0.9","controlBehavior":0,"count":10.0,"gmtCreate":1555572942154,"limitApp":"default","clusterMode":false,"port":8719,"grade":1,"id":13,"strategy":0}], @Class[class com.alibaba.csp.sentinel.slots.block.flow.FlowRule], ], null, com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException: Unrecognized field "app" (class com.alibaba.csp.sentinel.slots.block.flow.FlowRule), not marked as ignorable (12 known properties: "warmUpPeriodSec", "refResource", "rater", "strategy", "limitApp", "grade", "maxQueueingTimeMs", "clusterConfig", "clusterMode", "resource", "count", "controlBehavior"]) at [Source: {"app":"xxx","gmtModified":1555572942154,"resource":"com.xx.yy.ZZZZService:function(com.xx.yy.Ttt)","ip":"172.18.0.9","controlBehavior":0,"count":10.0,"gmtCreate":1555572942154,"limitApp":"default","clusterMode":false,"port":8719,"grade":1,"id":13,"strategy":0}; line: 1, column: 9] (through reference chain: com.alibaba.csp.sentinel.slots.block.flow.FlowRule["app"]) at com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException.from(UnrecognizedPropertyException.java:62) at com.fasterxml.jackson.databind.DeserializationContext.handleUnknownProperty(DeserializationContext.java:834) at com.fasterxml.jackson.databind.deser.std.StdDeserializer.handleUnknownProperty(StdDeserializer.java:1093) at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.handleUnknownProperty(BeanDeserializerBase.java:1489) at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.handleUnknownVanilla(BeanDeserializerBase.java:1467) at com.fasterxml.jackson.databind.deser.BeanDeserializer.vanillaDeserialize(BeanDeserializer.java:282) at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:140) at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:3814) at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:2858) at org.springframework.cloud.alibaba.sentinel.datasource.converter.JsonConverter.convertFlowRule(JsonConverter.java:115) at org.springframework.cloud.alibaba.sentinel.datasource.converter.JsonConverter.convert(JsonConverter.java:70) at org.springframework.cloud.alibaba.sentinel.datasource.converter.JsonConverter.convert(JsonConverter.java:38) at com.alibaba.csp.sentinel.datasource.AbstractDataSource.loadConfig(AbstractDataSource.java:48) at com.alibaba.csp.sentinel.datasource.AbstractDataSource.loadConfig(AbstractDataSource.java:44) at com.alibaba.csp.sentinel.datasource.zookeeper.ZookeeperDataSource$1.nodeChanged(ZookeeperDataSource.java:108) at org.apache.curator.framework.recipes.cache.NodeCache$4.apply(NodeCache.java:310) at org.apache.curator.framework.recipes.cache.NodeCache$4.apply(NodeCache.java:304) at org.apache.curator.framework.listen.ListenerContainer$1.run(ListenerContainer.java:93) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) , ]

5.最终，流量控制规则没有生效。

预期行为 Json可以成功解析为 [FlowRule] (https://github.com/alibaba/Sentinel/blob/master/sentinel-core/src/main/java/com/alibaba/csp/sentinel/slots/block/flow/FlowRule.java) 对象。

流量控制规则生效。

屏幕截图 【提问36】

附加上下文 springboot 1.5.3 java8 docker Sentinel Dashboard 1.4.0 sentinel-datasource-zookeeper 1.5.1 sentinel-transport-simple-http 1.5.1 spring-cloud-starter-alibaba-sentinel 0.1.1.RELEASE

以下是sentinel的配置，应用程序是基于docker编写的。

sentinel

spring.cloud.sentinel.transport.dashboard = sentinel-dashboard:8181

flow

spring.cloud.sentinel.datasource.flow.zk.server-addr = zookeeper:2181 spring.cloud.sentinel.datasource.flow.zk.path = /sentinel/rules/${spring.application.name}/flow

degrade

spring.cloud.sentinel.datasource.degrade.zk.server-addr = zookeeper:2181 spring.cloud.sentinel.datasource.degrade.zk.path = /sentinel/rules/${spring.application.name}/degrade

param

spring.cloud.sentinel.datasource.param-flow.zk.server-addr = zookeeper:2181 spring.cloud.sentinel.datasource.param-flow.zk.path = /sentinel/rules/${spring.application.name}/param

system

spring.cloud.sentinel.datasource.system.zk.server-addr = zookeeper:2181 spring.cloud.sentinel.datasource.system.zk.path = /sentinel/rules/${spring.application.name}/system

authority

spring.cloud.sentinel.datasource.authority.zk.server-addr = zookeeper:2181 spring.cloud.sentinel.datasource.authority.zk.path = /sentinel/rules/${spring.application.name}/authority

Json数据如下

[{"app":"app","clusterMode":false,"controlBehavior":0,"count":1.0,"gmtCreate":1555990566403,"gmtModified":1555990566403,"grade":1,"id":1,"ip":"172.18.0.7","limitApp":"default","port":8719,"resource":"/api/v1/asset/userAssetInfo","strategy":0}]

原提问者GitHub用户zhangtianhao