Mule 索引0处的输入意外结束dataweave异常

我使用下面的代码访问存储在流变量中的日期值，但它引发异常

Dataweave代码是：

%dw 1.0
%output application/java
---
flowVars.testEffDate

例外消息是：

    ERROR 2017-07-10 18:31:30,976 [[ 
    testItemSync].HTTP_Listener_Configuration.worker.01] org.mule.exception.CatchMessagingExceptionStrategy: 
    ********************************************************************************
    Message               : Exception while executing: 
    {
    ^
    Unexpected end-of-input at index 0 (line 1, position 1), expected JSON Value.
    Payload               :Id,Version,EffectiveDate
                        "",1,
                        20be1,2,2017-09-01

    Payload Type          : java.lang.String
    Element               : /PrFlow/processors/9/1/2/checkNProcessSubflow/subprocessors/1/0/3/0/7/0/3/0/1/subProcessSubflow/subprocessors/7/0/3/0/1 @ testItemSync:testPr.xml:436 (Transform Message)
    Element XML           : <dw:transform-message doc:name="Transform Message">
                        <dw:set-payload>%dw 1.0%output application/java---flowVars.testEffDate</dw:set-payload>
                        </dw:transform-message>
    --------------------------------------------------------------------------------
    Root Exception stack trace:
    com.mulesoft.weave.mule.exception.WeaveExecutionException: Exception while executing: 
    {
    ^
    Unexpected end-of-input at index 0 (line 1, position 1), expected JSON Value.
    at com.mulesoft.weave.mule.exception.WeaveExecutionException$.apply(WeaveExecutionException.scala:12)
    at com.mulesoft.weave.mule.WeaveMessageProcessor.execute(WeaveMessageProcessor.scala:121)
    at com.mulesoft.weave.mule.WeaveMessageProcessor.process(WeaveMessageProcessor.scala:67)
    at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:27)
    at org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute(MessageProcessorNotificationExecutionInterceptor.java:108)
    at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:44)
    at org.mule.processor.BlockingProcessorExecutor.executeNext(BlockingProcessorExecutor.java:88)
    at org.mule.processor.BlockingProcessorExecutor.execute(BlockingProcessorExecutor.java:59)
    at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:27)
    at org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute(MessageProcessorNotificationExecutionInterceptor.java:108)
    at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:44)
    at org.mule.routing.AbstractSelectiveRouter.processEventWithProcessor(AbstractSelectiveRouter.java:303)
    at org.mule.routing.AbstractSelectiveRouter.routeWithProcessors(AbstractSelectiveRouter.java:293)
    at org.mule.routing.AbstractSelectiveRouter.process(AbstractSelectiveRouter.java:193)
    at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:27)
    at org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute(MessageProcessorNotificationExecutionInterceptor.java:108)
    at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:44)
    at org.mule.processor.BlockingProcessorExecutor.executeNext(BlockingProcessorExecutor.java:88)
    at org.mule.processor.BlockingProcessorExecutor.execute(BlockingProcessorExecutor.java:59)
    at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:27)
    at org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute(MessageProcessorNotificationExecutionInterceptor.java:108)
    at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:44)
    at org.mule.routing.AbstractSelectiveRouter.processEventWithProcessor(AbstractSelectiveRouter.java:303)
    at org.mule.routing.AbstractSelectiveRouter.routeWithProcessors(AbstractSelectiveRouter.java:293)
    at org.mule.routing.AbstractSelectiveRouter.process(AbstractSelectiveRouter.java:193)
    at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:27)
    at org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute(MessageProcessorNotificationExecutionInterceptor.java:108)
    at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:44)
    at org.mule.processor.BlockingProcessorExecutor.executeNext(BlockingProcessorExecutor.java:88)
    at org.mule.processor.BlockingProcessorExecutor.execute(BlockingProcessorExecutor.java:59)
    at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:27)
    at org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute(MessageProcessorNotificationExecutionInterceptor.java:108)
    at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:44)
    at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:27)
    at org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute(MessageProcessorNotificationExecutionInterceptor.java:108)
    at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:44)
    at org.mule.processor.BlockingProcessorExecutor.executeNext(BlockingProcessorExecutor.java:88)
    at org.mule.processor.BlockingProcessorExecutor.execute(BlockingProcessorExecutor.java:59)
    at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:27)
    at org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute(MessageProcessorNotificationExecutionInterceptor.java:108)
    at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:44)
    at org.mule.routing.AbstractSelectiveRouter.processEventWithProcessor(AbstractSelectiveRouter.java:303)
    at org.mule.routing.AbstractSelectiveRouter.routeWithProcessors(AbstractSelectiveRouter.java:293)
    at org.mule.routing.AbstractSelectiveRouter.process(AbstractSelectiveRouter.java:193)
    at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:27)
    at org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute(MessageProcessorNotificationExecutionInterceptor.java:108)
    at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:44)
    at org.mule.processor.BlockingProcessorExecutor.executeNext(BlockingProcessorExecutor.java:88)
    at org.mule.processor.BlockingProcessorExecutor.execute(BlockingProcessorExecutor.java:59)
    at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:27)
    at org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute(MessageProcessorNotificationExecutionInterceptor.java:108)
    at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:44)
    at org.mule.routing.AbstractSelectiveRouter.processEventWithProcessor(AbstractSelectiveRouter.java:303)
    at org.mule.routing.AbstractSelectiveRouter.routeWithProcessors(AbstractSelectiveRouter.java:293)
    at org.mule.routing.AbstractSelectiveRouter.process(AbstractSelectiveRouter.java:193)
    at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:27)
    at org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute(MessageProcessorNotificationExecutionInterceptor.java:108)
    at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:44)
    at org.mule.processor.BlockingProcessorExecutor.executeNext(BlockingProcessorExecutor.java:88)
    at org.mule.processor.BlockingProcessorExecutor.execute(BlockingProcessorExecutor.java:59)
    at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:27)
    at org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute(MessageProcessorNotificationExecutionInterceptor.java:108)
    at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:44)
    at org.mule.routing.AbstractSelectiveRouter.processEventWithProcessor(AbstractSelectiveRouter.java:303)
    at org.mule.routing.AbstractSelectiveRouter.routeWithProcessors(AbstractSelectiveRouter.java:293)
    at org.mule.routing.AbstractSelectiveRouter.process(AbstractSelectiveRouter.java:193)
    at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:27)
    at org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute(MessageProcessorNotificationExecutionInterceptor.java:108)
    at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:44)
    at org.mule.processor.BlockingProcessorExecutor.executeNext(BlockingProcessorExecutor.java:88)
    at org.mule.processor.BlockingProcessorExecutor.execute(BlockingProcessorExecutor.java:59)
    at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:27)
    at org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute(MessageProcessorNotificationExecutionInterceptor.java:108)
    at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:44)
    at org.mule.routing.AbstractSelectiveRouter.processEventWithProcessor(AbstractSelectiveRouter.java:303)
    at org.mule.routing.AbstractSelectiveRouter.routeWithProcessors(AbstractSelectiveRouter.java:293)
    at org.mule.routing.AbstractSelectiveRouter.process(AbstractSelectiveRouter.java:193)
    at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:27)
    at org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute(MessageProcessorNotificationExecutionInterceptor.java:108)
    at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:44)
    at org.mule.processor.BlockingProcessorExecutor.executeNext(BlockingProcessorExecutor.java:88)
    at org.mule.processor.BlockingProcessorExecutor.execute(BlockingProcessorExecutor.java:59)
    at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:27)
    at org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute(MessageProcessorNotificationExecutionInterceptor.java:108)
    at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:44)
    at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:27)
    at org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute(MessageProcessorNotificationExecutionInterceptor.java:108)
    at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:44)
    at org.mule.processor.BlockingProcessorExecutor.executeNext(BlockingProcessorExecutor.java:88)
    at org.mule.processor.BlockingProcessorExecutor.execute(BlockingProcessorExecutor.java:59)
    at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:27)
    at org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute(MessageProcessorNotificationExecutionInterceptor.java:108)
    at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:44)
    at org.mule.routing.AbstractSelectiveRouter.processEventWithProcessor(AbstractSelectiveRouter.java:303)
    at org.mule.routing.AbstractSelectiveRouter.routeWithProcessors(AbstractSelectiveRouter.java:293)
    at org.mule.routing.AbstractSelectiveRouter.routeWithProcessor(AbstractSelectiveRouter.java:283)
    at org.mule.routing.AbstractSelectiveRouter.process(AbstractSelectiveRouter.java:198)
    at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:27)
    at org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute(MessageProcessorNotificationExecutionInterceptor.java:108)
    at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:44)
    at org.mule.processor.BlockingProcessorExecutor.executeNext(BlockingProcessorExecutor.java:88)
    at org.mule.processor.BlockingProcessorExecutor.execute(BlockingProcessorExecutor.java:59)
    at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:27)
    at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:44)
    at org.mule.processor.BlockingProcessorExecutor.executeNext(BlockingProcessorExecutor.java:98)
    at org.mule.processor.BlockingProcessorExecutor.execute(BlockingProcessorExecutor.java:59)
    at org.mule.processor.AsyncInterceptingMessageProcessor.process(AsyncInterceptingMessageProcessor.java:102)
    at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:27)
    at org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute(MessageProcessorNotificationExecutionInterceptor.java:108)
    at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:44)
    at org.mule.processor.BlockingProcessorExecutor.executeNext(BlockingProcessorExecutor.java:98)
    at org.mule.processor.BlockingProcessorExecutor.execute(BlockingProcessorExecutor.java:59)
    at org.mule.construct.DynamicPipelineMessageProcessor.process(DynamicPipelineMessageProcessor.java:55)
    at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:27)
    at org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute(MessageProcessorNotificationExecutionInterceptor.java:108)
    at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:44)
    at org.mule.processor.BlockingProcessorExecutor.executeNext(BlockingProcessorExecutor.java:88)
    at org.mule.processor.BlockingProcessorExecutor.execute(BlockingProcessorExecutor.java:59)
    at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:27)
    at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:44)
    at org.mule.processor.BlockingProcessorExecutor.executeNext(BlockingProcessorExecutor.java:98)
    at org.mule.processor.BlockingProcessorExecutor.execute(BlockingProcessorExecutor.java:59)
    at org.mule.interceptor.AbstractEnvelopeInterceptor.processBlocking(AbstractEnvelopeInterceptor.java:58)
    at org.mule.processor.AbstractRequestResponseMessageProcessor.process(AbstractRequestResponseMessageProcessor.java:47)
    at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:27)
    at org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute(MessageProcessorNotificationExecutionInterceptor.java:108)
    at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:44)
    at org.mule.processor.BlockingProcessorExecutor.executeNext(BlockingProcessorExecutor.java:98)
    at org.mule.processor.BlockingProcessorExecutor.execute(BlockingProcessorExecutor.java:59)
    at org.mule.processor.AbstractFilteringMessageProcessor.process(AbstractFilteringMessageProcessor.java:52)
    at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:27)
    at org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute(MessageProcessorNotificationExecutionInterceptor.java:108)
    at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:44)
    at org.mule.processor.BlockingProcessorExecutor.executeNext(BlockingProcessorExecutor.java:98)
    at org.mule.processor.BlockingProcessorExecutor.execute(BlockingProcessorExecutor.java:59)
    at org.mule.processor.AbstractRequestResponseMessageProcessor.processBlocking(AbstractRequestResponseMessageProcessor.java:56)
    at org.mule.processor.AbstractRequestResponseMessageProcessor.process(AbstractRequestResponseMessageProcessor.java:47)
    at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:27)
    at org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute(MessageProcessorNotificationExecutionInterceptor.java:108)
    at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:44)
    at org.mule.processor.BlockingProcessorExecutor.executeNext(BlockingProcessorExecutor.java:88)
    at org.mule.processor.BlockingProcessorExecutor.execute(BlockingProcessorExecutor.java:59)
    at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:27)
    at org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute(MessageProcessorNotificationExecutionInterceptor.java:108)
    at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:44)
    at org.mule.construct.AbstractPipeline$3.process(AbstractPipeline.java:233)
    at org.mule.module.http.internal.listener.HttpMessageProcessorTemplate.routeEvent(HttpMessageProcessorTemplate.java:73)
    at org.mule.execution.AsyncResponseFlowProcessingPhase$1.process(AsyncResponseFlowProcessingPhase.java:72)
    at org.mule.execution.AsyncResponseFlowProcessingPhase$1.process(AsyncResponseFlowProcessingPhase.java:59)
    at org.mule.execution.ExecuteCallbackInterceptor.execute(ExecuteCallbackInterceptor.java:16)
    at org.mule.execution.CommitTransactionInterceptor.execute(CommitTransactionInterceptor.java:35)
    at org.mule.execution.CommitTransactionInterceptor.execute(CommitTransactionInterceptor.java:22)
    at org.mule.execution.HandleExceptionInterceptor.execute(HandleExceptionInterceptor.java:30)
    at org.mule.execution.HandleExceptionInterceptor.execute(HandleExceptionInterceptor.java:14)
    at org.mule.execution.BeginAndResolveTransactionInterceptor.execute(BeginAndResolveTransactionInterceptor.java:67)
    at org.mule.execution.ResolvePreviousTransactionInterceptor.execute(ResolvePreviousTransactionInterceptor.java:44)
    at org.mule.execution.SuspendXaTransactionInterceptor.execute(SuspendXaTransactionInterceptor.java:50)
    at org.mule.execution.ValidateTransactionalStateInterceptor.execute(ValidateTransactionalStateInterceptor.java:40)
    at org.mule.execution.IsolateCurrentTransactionInterceptor.execute(IsolateCurrentTransactionInterceptor.java:41)
    at org.mule.execution.ExternalTransactionInterceptor.execute(ExternalTransactionInterceptor.java:48)
    at org.mule.execution.RethrowExceptionInterceptor.execute(RethrowExceptionInterceptor.java:28)
    at org.mule.execution.RethrowExceptionInterceptor.execute(RethrowExceptionInterceptor.java:13)
    at org.mule.execution.TransactionalErrorHandlingExecutionTemplate.execute(TransactionalErrorHandlingExecutionTemplate.java:110)
    at org.mule.execution.AsyncResponseFlowProcessingPhase.runPhase(AsyncResponseFlowProcessingPhase.java:58)
    at org.mule.execution.AsyncResponseFlowProcessingPhase.runPhase(AsyncResponseFlowProcessingPhase.java:35)
    at org.mule.execution.PhaseExecutionEngine$InternalPhaseExecutionEngine.phaseSuccessfully(PhaseExecutionEngine.java:65)
    at org.mule.execution.PhaseExecutionEngine$InternalPhaseExecutionEngine.phaseSuccessfully(PhaseExecutionEngine.java:69)
    at com.mulesoft.mule.throttling.ThrottlingPhase.runPhase(ThrottlingPhase.java:187)
    at com.mulesoft.mule.throttling.ThrottlingPhase.runPhase(ThrottlingPhase.java:58)
    at org.mule.execution.PhaseExecutionEngine$InternalPhaseExecutionEngine.phaseSuccessfully(PhaseExecutionEngine.java:65)
    at com.mulesoft.gateway.http.phases.GatewayValidationPhase.runPhase(GatewayValidationPhase.java:93)
    at com.mulesoft.gateway.http.phases.GatewayValidationPhase.runPhase(GatewayValidationPhase.java:49)
    at org.mule.execution.PhaseExecutionEngine$InternalPhaseExecutionEngine.phaseSuccessfully(PhaseExecutionEngine.java:65)
    at org.mule.modules.cors.CorsPhase.runPhase(CorsPhase.java:113)
    at org.mule.modules.cors.CorsPhase.runPhase(CorsPhase.java:40)
    at org.mule.execution.PhaseExecutionEngine$InternalPhaseExecutionEngine.process(PhaseExecutionEngine.java:114)
    at org.mule.execution.PhaseExecutionEngine.process(PhaseExecutionEngine.java:41)
    at org.mule.execution.MuleMessageProcessingManager.processMessage(MuleMessageProcessingManager.java:32)
    at org.mule.module.http.internal.listener.DefaultHttpListener$1.handleRequest(DefaultHttpListener.java:133)
    at org.mule.module.http.internal.listener.grizzly.GrizzlyRequestDispatcherFilter.handleRead(GrizzlyRequestDispatcherFilter.java:83)
    at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119)
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:284)
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:201)
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:133)
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:112)
    at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77)
    at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:526)
    at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:112)
    at org.mule.module.http.internal.listener.grizzly.ExecutorPerServerAddressIOStrategy.run0(ExecutorPerServerAddressIOStrategy.java:102)
    at org.mule.module.http.internal.listener.grizzly.ExecutorPerServerAddressIOStrategy.access$100(ExecutorPerServerAddressIOStrategy.java:30)
    at org.mule.module.http.internal.listener.grizzly.ExecutorPerServerAddressIOStrategy$WorkerThreadRunnable.run(ExecutorPerServerAddressIOStrategy.java:125)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

    ********************************************************************************

错误2017-07-1018:31:30976[[
testItemSync].HTTP\u Listener\u Configuration.worker.01]org.mule.exception.CatchMessaginExceptionStrategy:
********************************************************************************
消息：执行时发生异常：
{
^
索引0处的输入意外结束（第1行，位置1），应为JSON值。
有效负载：Id、版本、生效日期
"",1,
20be1,22017-09-01
有效负载类型：java.lang.String
元素：/PrFlow/processors/9/1/2/checkNProcessSubflow/subprocessors/1/0/3/0/7/0/3/0/1/subProcessSubflow/subprocessors/7/0/3/0/1@testItemSync:testPr.xml:436（转换消息）
元素XML:
%dw 1.0%输出应用程序/java--flowVars.TesteOffdate
--------------------------------------------------------------------------------
根异常堆栈跟踪：
com.mulesoft.weave.mule.exception.WeaveExecutionException:执行时发生异常：
{
^
索引0处的输入意外结束（第1行，位置1），应为JSON值。
在com.mulesoft.weave.mule.exception.WeaveExecutionException$.apply（WeaveExecutionException.scala:12）
位于com.mulesoft.weave.mule.WeaveMessageProcessor.execute（WeaveMessageProcessor.scala:121）
位于com.mulesoft.weave.mule.WeaveMessageProcessor.process（WeaveMessageProcessor.scala:67）
位于org.mule.execution.exceptionMessaginExceptionExecutionInterceptor.execute（exceptionMessaginExceptionExecutionInterceptor.java:27）
位于org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute（MessageProcessorNotificationExecutionInterceptor.java:108）
位于org.mule.execution.MessageProcessorExecutionTemplate.execute（MessageProcessorExecutionTemplate.java:44）
位于org.mule.processor.BlockingProcessorExecutor.executeNext（BlockingProcessorExecutor.java:88）
在org.mule.processor.BlockingProcessorExecutor.execute上（BlockingProcessorExecutor.java:59）
位于org.mule.execution.exceptionMessaginExceptionExecutionInterceptor.execute（exceptionMessaginExceptionExecutionInterceptor.java:27）
位于org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute（MessageProcessorNotificationExecutionInterceptor.java:108）
位于org.mule.execution.MessageProcessorExecutionTemplate.execute（MessageProcessorExecutionTemplate.java:44）
位于org.mule.routing.AbstractSelectionRouter.processEventWithProcessor（AbstractSelectionRouter.java:303）
位于org.mule.routing.AbstractSelectionRouter.routeWithProcessors（AbstractSelectionRouter.java:293）
位于org.mule.routing.AbstractSelectionRouter.process（AbstractSelectionRouter.java:193）
位于org.mule.execution.exceptionMessaginExceptionExecutionInterceptor.execute（exceptionMessaginExceptionExecutionInterceptor.java:27）
位于org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute（MessageProcessorNotificationExecutionInterceptor.java:108）
位于org.mule.execution.MessageProcessorExecutionTemplate.execute（MessageProcessorExecutionTemplate.java:44）
位于org.mule.processor.BlockingProcessorExecutor.executeNext（BlockingProcessorExecutor.java:88）
在org.mule.processor.BlockingProcessorExecutor.execute上（BlockingProcessorExecutor.java:59）
位于org.mule.execution.exceptionMessaginExceptionExecutionInterceptor.execute（exceptionMessaginExceptionExecutionInterceptor.java:27）
位于org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute（MessageProcessorNotificationExecutionInterceptor.java:108）
位于org.mule.execution.MessageProcessorExecutionTemplate.execute（MessageProcessorExecutionTemplate.java:44）
位于org.mule.routing.AbstractSelectionRouter.processEventWithProcessor（AbstractSelectionRouter.java:303）
位于org.mule.routing.AbstractSelectionRouter.routeWithProcessors（AbstractSelectionRouter.java:293）
位于org.mule.routing.AbstractSelectionRouter.process（AbstractSelectionRouter.java:193）
位于org.mule.execution.exceptionMessaginExceptionExecutionInterceptor.execute（exceptionMessaginExceptionExecutionInterceptor.java:27）
位于org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute（MessageProcessorNotificationExecutionInterceptor.java:108）
位于org.mule.execution.MessageProcessorExecutionTemplate.execute（MessageProcessorExecutionTemplate.java:44）
位于org.mule.processor.BlockingProcessorExecutor.executeNext（BlockingProcessorExecutor.java:88）
在org.mule.processor.BlockingProcessorExecutor.execute上（BlockingProcessorExecutor.java:59）
位于org.mule.execution.exceptionMessaginExceptionExecutionInterceptor.execute（exceptionMessaginExceptionExecutionInterceptor.java:27）
位于org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute（MessageProcessorNotificationExecutionInterceptor.java:108）
位于org.mule.execution.MessageProcessorExecutionTemplate.execute（MessageProcessorExecutionTemplate.java:44）
位于org.mule.execution.exceptionMessaginExceptionExecutionInterceptor.execute（exceptionMessaginExceptionExecutionInterceptor.java:27）
位于org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute（MessageProcessorNotificationExecutionInterceptor.java:108）
位于org.mule.execution.MessageProcessorExecutionTemplate.execute（MessageProcessorExecutionTemplate.java:44）
位于org.mule.processor.BlockingProcessorExecutor.executeNext（BlockingProcessorExecutor.java:88）
在org.mule.processor.BlockingProcessorExecutor.execute上（BlockingProcessorExecutor.java:59）
位于org.mule.execution.exceptionMessaginExceptionExecutionInterceptor.execute（exceptionMessaginExceptionExecutionInterceptor.java:27）
%dw 1.0
%output application/java
---
date: flowVars.testEffDate as :string {format: "<< Introduce the format of your date there >>"}

<dw:transform-message doc:name="Transform Message">
            <dw:input-payload mimeType="application/csv"/> 
            <dw:set-payload><![CDATA[%dw 1.0
%output application/java
---
flowVars.testEffDate]]></dw:set-payload>
        </dw:transform-message>