我在批处理作业代码中添加了带有过滤器的Zookeeper元数据存储，以在集群环境中同步数据并在多个JVM上水平扩展。但我的所有消息都在丢弃通道中，并且在作业（Jpa适配器）运行时一次在日志中出现错误。
Hibernate:
select
componenti0_.id as id1_4_,
componenti0_.component_info_file_id as componen2_4_,
componenti0_.component_serial_no as componen3_4_,
componenti0_.date_received as date_rec4_4_,
componenti0_.date_recorded as date_rec5_4_,
componenti0_.engine_hours as engine_h6_4_,
componenti0_.is_processed as is_proce7_4_,
componenti0_.product_serial_no as product_8_4_
from
cs_component_info componenti0_
2017-03-15 21:28:55.290 INFO [componentdatafiles,,,] 39712 --- [54.26.101:2181)] org.apache.zookeeper.ClientCnxn : Session establishment complete on server **************, sessionid = 0x35a82a934c40127, negotiated timeout = 40000
2017-03-15 21:28:55.294 INFO [componentdatafiles,,,] 39712 --- [54.26.100:2181)] org.apache.zookeeper.ClientCnxn : Session establishment complete on server *************, sessionid = 0x25a82aab90a0122, negotiated timeout = 40000
2017-03-15 21:28:55.313 INFO [componentdatafiles,,,] 39712 --- [p-1-EventThread] o.a.c.f.state.ConnectionStateManager : State change: CONNECTED
2017-03-15 21:28:55.313 INFO [componentdatafiles,,,] 39712 --- [p-1-EventThread] o.a.c.f.state.ConnectionStateManager : State change: CONNECTED
2017-03-15 21:28:55.332 INFO [componentdatafiles,,,] 39712 --- [54.26.101:2181)] org.apache.zookeeper.ClientCnxn : Session establishment complete on server ****************, sessionid = 0x35a82a934c40128, negotiated timeout = 40000
2017-03-15 21:28:55.333 INFO [componentdatafiles,,,] 39712 --- [p-1-EventThread] o.a.c.f.state.ConnectionStateManager : State change: CONNECTED
2017-03-15 21:28:55.507 INFO [componentdatafiles,053728794a9688b3,374707c3669809db,false] 39712 --- [ask-scheduler-1] o.s.integration.handler.LoggingHandler : [com.deere.componentdatafiles.domain.ComponentInfo@4f31c4d6, com.deere.componentdatafiles.domain.ComponentInfo@54405aa7, com.deere.componentdatafiles.domain.ComponentInfo@584f0396, com.deere.componentdatafiles.domain.ComponentInfo@25710ebd, com.deere.componentdatafiles.domain.ComponentInfo@3b490019, com.deere.componentdatafiles.domain.ComponentInfo@6d0ae0b5, com.deere.componentdatafiles.domain.ComponentInfo@4df90d31, com.deere.componentdatafiles.domain.ComponentInfo@6050f6d5, com.deere.componentdatafiles.domain.ComponentInfo@13ea7b0e, com.deere.componentdatafiles.domain.ComponentInfo@29df2e8e, com.deere.componentdatafiles.domain.ComponentInfo@2c4a2e01, com.deere.componentdatafiles.domain.ComponentInfo@4b4b8303, com.deere.componentdatafiles.domain.ComponentInfo@bb9b36f, com.deere.componentdatafiles.domain.ComponentInfo@5b4257c8, com.deere.componentdatafiles.domain.ComponentInfo@77a57353, com.deere.componentdatafiles.domain.ComponentInfo@3e909678, com.deere.componentdatafiles.domain.ComponentInfo@53e4f875]
2017-03-15 21:28:55.511 INFO [componentdatafiles,053728794a9688b3,83a7350bbbdb4b79,false] 39712 --- [ask-scheduler-1] o.s.integration.handler.LoggingHandler : com.deere.componentdatafiles.domain.ComponentInfo@4f31c4d6
2017-03-15 21:28:55.519 INFO [componentdatafiles,9f9c46137110bacc,a02fd11fe137a83c,false] 39712 --- [ask-scheduler-1] o.s.integration.handler.LoggingHandler : org.springframework.messaging.MessageHandlingException: Expression evaluation failed: @componentInfoMetadataStore.get(payload.id) == null; nested exception is java.lang.NullPointerException, failedMessage=GenericMessage [payload=com.deere.componentdatafiles.domain.ComponentInfo@4f31c4d6, headers={sequenceNumber=1, sequenceSize=17, X-Message-Sent=true, messageSent=true, spanTraceId=053728794a9688b3, spanId=91816fafd9b447d0, X-B3-SpanId=91816fafd9b447d0, currentSpan=[Trace: 053728794a9688b3, Span: 91816fafd9b447d0, Parent: 053728794a9688b3, exportable:false], X-B3-Sampled=0, X-B3-TraceId=053728794a9688b3, correlationId=3bac32df-115c-4ff1-8270-2bfca59a4e83, id=4ad7414c-7b63-cfa8-fb03-ce2e20bf16b8, X-Current-Span=[Trace: 053728794a9688b3, Span: 91816fafd9b447d0, Parent: 053728794a9688b3, exportable:false], spanSampled=0}]
at org.springframework.integration.util.AbstractExpressionEvaluator.evaluateExpression(AbstractExpressionEvaluator.java:143)
at org.springframework.integration.handler.ExpressionEvaluatingMessageProcessor.processMessage(ExpressionEvaluatingMessageProcessor.java:72)
at org.springframework.integration.filter.AbstractMessageProcessingSelector.accept(AbstractMessageProcessingSelector.java:62)
at org.springframework.integration.filter.MessageFilter.doHandleRequestMessage(MessageFilter.java:161)
at org.springframework.integration.handler.AbstractReplyProducingPostProcessingMessageHandler.handleRequestMessage(AbstractReplyProducingPostProcessingMessageHandler.java:46)
at org.springframework.integration.handler.AbstractReplyProducingMessageHandler.handleMessageInternal(AbstractReplyProducingMessageHandler.java:109)
at org.springframework.integration.handler.AbstractMessageHandler.handleMessage(AbstractMessageHandler.java:127)
at org.springframework.integration.dispatcher.AbstractDispatcher.tryOptimizedDispatch(AbstractDispatcher.java:116)
at org.springframework.integration.dispatcher.UnicastingDispatcher.doDispatch(UnicastingDispatcher.java:148)
at org.springframework.integration.dispatcher.UnicastingDispatcher.dispatch(UnicastingDispatcher.java:121)
at org.springframework.integration.channel.AbstractSubscribableChannel.doSend(AbstractSubscribableChannel.java:89)
at org.springframework.integration.channel.AbstractMessageChannel.send(AbstractMessageChannel.java:423)
at org.springframework.integration.channel.AbstractMessageChannel.send(AbstractMessageChannel.java:373)
at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:115)
at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:45)
at org.springframework.messaging.core.AbstractMessageSendingTemplate.send(AbstractMessageSendingTemplate.java:105)
at org.springframework.integration.handler.AbstractMessageProducingHandler.sendOutput(AbstractMessageProducingHandler.java:292)
at org.springframework.integration.handler.AbstractMessageProducingHandler.produceOutput(AbstractMessageProducingHandler.java:212)
at org.springframework.integration.splitter.AbstractMessageSplitter.produceOutput(AbstractMessageSplitter.java:159)
at org.springframework.integration.handler.AbstractMessageProducingHandler.sendOutputs(AbstractMessageProducingHandler.java:129)
at org.springframework.integration.handler.AbstractReplyProducingMessageHandler.handleMessageInternal(AbstractReplyProducingMessageHandler.java:115)
at org.springframework.integration.handler.AbstractMessageHandler.handleMessage(AbstractMessageHandler.java:127)
at org.springframework.integration.dispatcher.AbstractDispatcher.tryOptimizedDispatch(AbstractDispatcher.java:116)
at org.springframework.integration.dispatcher.UnicastingDispatcher.doDispatch(UnicastingDispatcher.java:148)
at org.springframework.integration.dispatcher.UnicastingDispatcher.dispatch(UnicastingDispatcher.java:121)
at org.springframework.integration.channel.AbstractSubscribableChannel.doSend(AbstractSubscribableChannel.java:89)
at org.springframework.integration.channel.AbstractMessageChannel.send(AbstractMessageChannel.java:423)
at org.springframework.integration.channel.AbstractMessageChannel.send(AbstractMessageChannel.java:373)
at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:115)
at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:45)
at org.springframework.messaging.core.AbstractMessageSendingTemplate.send(AbstractMessageSendingTemplate.java:105)
at org.springframework.integration.endpoint.SourcePollingChannelAdapter.handleMessage(SourcePollingChannelAdapter.java:210)
at org.springframework.integration.endpoint.AbstractPollingEndpoint.doPoll(AbstractPollingEndpoint.java:272)
at org.springframework.integration.endpoint.AbstractPollingEndpoint.access$000(AbstractPollingEndpoint.java:58)
at org.springframework.integration.endpoint.AbstractPollingEndpoint$1.call(AbstractPollingEndpoint.java:190)
at org.springframework.integration.endpoint.AbstractPollingEndpoint$1.call(AbstractPollingEndpoint.java:186)
at org.springframework.integration.endpoint.AbstractPollingEndpoint$Poller$1.run(AbstractPollingEndpoint.java:353)
at org.springframework.integration.util.ErrorHandlingTaskExecutor$1.run(ErrorHandlingTaskExecutor.java:55)
at org.springframework.core.task.SyncTaskExecutor.execute(SyncTaskExecutor.java:50)
at org.springframework.integration.util.ErrorHandlingTaskExecutor.execute(ErrorHandlingTaskExecutor.java:51)
at org.springframework.integration.endpoint.AbstractPollingEndpoint$Poller.run(AbstractPollingEndpoint.java:344)
at org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:54)
at org.springframework.scheduling.concurrent.ReschedulingRunnable.run(ReschedulingRunnable.java:81)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(Unknown Source)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NullPointerException
at org.springframework.integration.zookeeper.metadata.ZookeeperMetadataStore.get(ZookeeperMetadataStore.java:205)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.springframework.expression.spel.support.ReflectiveMethodExecutor.execute(ReflectiveMethodExecutor.java:113)
at org.springframework.expression.spel.ast.MethodReference.getValueInternal(MethodReference.java:129)
at org.springframework.expression.spel.ast.MethodReference.access$000(MethodReference.java:49)
at org.springframework.expression.spel.ast.MethodReference$MethodValueRef.getValue(MethodReference.java:347)
at org.springframework.expression.spel.ast.CompoundExpression.getValueInternal(CompoundExpression.java:88)
at org.springframework.expression.spel.ast.OpEQ.getValueInternal(OpEQ.java:42)
at org.springframework.expression.spel.ast.OpEQ.getValueInternal(OpEQ.java:32)
at org.springframework.expression.spel.ast.SpelNodeImpl.getTypedValue(SpelNodeImpl.java:131)
at org.springframework.expression.spel.standard.SpelExpression.getValue(SpelExpression.java:330)
at org.springframework.integration.util.AbstractExpressionEvaluator.evaluateExpression(AbstractExpressionEvaluator.java:169)
at org.springframework.integration.util.AbstractExpressionEvaluator.evaluateExpression(AbstractExpressionEvaluator.java:128)
... 49 more
我想知道在设置Metadatastore或使用表达式时是否缺少一些配置细节。 以下是我的配置细节。
<int-jpa:inbound-channel-adapter
channel="inboundChannelAdapterOne" entity-manager-factory="entityManagerFactory"
auto-startup="true" jpa-query="select cmpntinfo from ComponentInfo cmpntinfo"
expect-single-result="false" delete-after-poll="false">
<int:poller fixed-rate="${componentInfoPollarInterval}">
<!-- <int:transactional propagation="REQUIRES_NEW" transaction-manager="transactionManager"/> -->
</int:poller>
</int-jpa:inbound-channel-adapter>
<splitter id="splitter" input-channel="inboundChannelAdapterOne"
output-channel="splitteroutputChannel" />
<int:publish-subscribe-channel id="idempotentServiceChannel"/>
<integration:channel id="discardChannel" />
<int:filter input-channel="splitteroutputChannel"
output-channel="idempotentServiceChannel"
discard-channel="discardChannel"
expression="@componentInfoMetadataStore.get(payload.id) == null"/>
<int:outbound-channel-adapter channel="idempotentServiceChannel"
expression="@componentInfoMetadataStore.put(payload.id, 'payload.componentSerialNo')"/>
<int:service-activator id="componentInfoPollarActivator"
input-channel="idempotentServiceChannel" ref="componentInfoPollarConsumer"
method="componentInfoListen" />
<int:service-activator id="discardChannelActivator"
input-channel="discardChannel" ref="componentInfoPollarConsumer"
method="discard" />
<beans:bean id="componentInfoMetadataStore"
class="org.springframework.integration.zookeeper.metadata.ZookeeperMetadataStore">
<beans:constructor-arg ref="componentInfoZookeeperClient" />
<beans:property name="root" value="/componentInfoMetaDataStore" />
<beans:property name="phase" value="-2147483648" />
</beans:bean>
<beans:bean id="componentInfoZookeeperClient"
class="org.springframework.integration.zookeeper.config.CuratorFrameworkFactoryBean">
<beans:constructor-arg value="${zookeeper.server.uri}" />
</beans:bean>
答案 0 :(得分：0)
该错误意味着元数据存储尚未启动。
需要在适配器之前启动。
尝试将其phase属性设置为较大的负数 - 例如Integer.MIN_VALUE（因此它很早就开始了）。