Unscheduled/unnecessary file poll when taskExecutor is not default taskScheduler

[jingyangpeng]

After one poll and process(hadler.handleFile sleep 5s then do real process), there are bunch of unscheduled polls although i set 1s delay . Is it an issue? log is attached.

Context:

	<integration:channel id="filesIn-1"/>
	  <integration:inbound-channel-adapter id="inbound-channel-adapter-1" ref="pollableFileSource-1" channel="filesIn-1" >
    	<integration:poller ref="filePoller-1" />
	</integration:inbound-channel-adapter>
	
	<file:outbound-channel-adapter id="filesOut-1"
		delete-source-files="true" filename-generator="fileNameGenerator"
		directory="${dealer_dir}">
	</file:outbound-channel-adapter>

	<integration:service-activator 
		input-channel="filesIn-1" output-channel="filesOut-1" ref="handler" method="handleFile">
	</integration:service-activator>

	<integration:poller id="filePoller-1"
		max-messages-per-poll="2" default="false"
		trigger="fixedDelayTrigger-1" task-executor="taskExecutor-1">
		<integration:transactional transaction-manager="transactionManager"/>
	</integration:poller>
	
	<bean id="fixedDelayTrigger-1" class="org.springframework.scheduling.support.PeriodicTrigger"
		p:fixedRate="false">
		<constructor-arg value="1000"/>
	</bean>
	<bean id="taskExecutor-1"
		class="org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor"
		p:threadNamePrefix="orderTask-1_"
		p:waitForTasksToCompleteOnShutdown="true"
		p:maxPoolSize="1"			
		>
	</bean>
 
     <bean id="pollableFileSource-1"
      class="org.springframework.integration.file.FileReadingMessageSource"
      	p:directory="${dealer_dir}"
        p:scanner-ref="directoryFilterScanner-1"
        >
        <constructor-arg ref="lastModifiedFileComparator"/>	
     </bean>

       <bean id="directoryFilterScanner-1" class="c.f.fileprocess.DirectoryFilterScanner"
		p:dirFilter="g#{fileProcessDefinition.groupCodeParttern('1')}${environment}[0-9]{2}/in/OS">
 	 	<property name="filter">
	 		<bean class="org.springframework.integration.file.filters.AcceptAllFileListFilter"/>
	 	</property>
	</bean>