我在輪詢器內部有sfdc(salesforce連接器),然後在從sfdc獲取數據並將數據加載到數據庫後爲其啓用了水印。使用輪詢中的輪詢水印時遇到錯誤
<flow name="loadData" processingStrategy="synchronous">
<poll doc:name="Poll">
<fixed-frequency-scheduler frequency="2" timeUnit="MINUTES"/>
<watermark variable="timestamp" default-expression="#[server.dateTime.format("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'")]" selector="MAX" selector-expression="#[payload.LastModifiedDate]" object-store-ref="sfdcStore"/>
<processor-chain doc:name="Processor Chain">
<logger message="poller started at #[server.dateTime]" level="INFO" doc:name="start"/>
<sfdc:query config-ref="svccloud_salesforce_configuration" query="SELECT Name, , Id, BillingStreet, BillingCity, BillingState, BillingCountry, BillingPostalCode, Phone, Pathway_Status__c FROM Account where LastModifiedDate < #[flowVars['timestamp']] and RecordTypeId IN (SELECT Id FROM RecordType where Name = 'Customer')" doc:name="Quering Customer Details"/>
</processor-chain>
</poll>
<logger message="process to DB" level="INFO"/>
</flow>
數據正在獲取並正確加載到數據庫,但最新日期沒有存儲在timestamp變量中。我收到以下信息消息。如果存儲時間戳值,我們將得到什麼消息。能否請您在此
INFO 2017-08-28 15:06:26,795 [pool-13-thread-1] org.mule.transport.polling.watermark.Watermark: Watermark value will not be updated since poll processor returned no results