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failed to write Message payload to HDFS; nested exception is org.springframework.data.hadoop.store.StoreException: We've reached maxOpenAttempts=10 to find suitable output path. Last path tried was path=[/sysr/xd/m2-9.txt.tmp]
org.springframework.messaging.MessageHandlingException: message not a String	at org.springframework.xd.integration.hadoop.outbound.HdfsDataStoreMessageHandler.doWrite(HdfsDataStoreMessageHandler.java:75)	at org.springframework.xd.integration.hadoop.outbound.HdfsStoreMessageHandler.handleMessageInternal(HdfsStoreMessageHandler.java:126)	at org.springframework.integration.handler.AbstractMessageHandler.handleMessage(AbstractMessageHandler.java:78)	at sun.reflect.GeneratedMethodAccessor89.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:606)	at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)	at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)	at org.springframework.integration.monitor.SimpleMessageHandlerMetrics.handleMessage(SimpleMessageHandlerMetrics.java:106)	at org.springframework.integration.monitor.SimpleMessageHandlerMetrics.invoke(SimpleMessageHandlerMetrics.java:86)	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)	at com.sun.proxy.$Proxy100.handleMessage(Unknown Source)	at org.springframework.integration.dispatcher.AbstractDispatcher.tryOptimizedDispatch(AbstractDispatcher.java:116)	at org.springframework.integration.dispatcher.UnicastingDispatcher.doDispatch(UnicastingDispatcher.java:101)	at org.springframework.integration.dispatcher.UnicastingDispatcher.dispatch(UnicastingDispatcher.java:97)	at org.springframework.integration.channel.AbstractSubscribableChannel.doSend(AbstractSubscribableChannel.java:77)	at org.springframework.integration.channel.AbstractMessageChannel.send(AbstractMessageChannel.java:255)	at org.springframework.integration.channel.AbstractMessageChannel.send(AbstractMessageChannel.java:223)	at sun.reflect.GeneratedMethodAccessor88.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:606)	at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)	at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)	at org.springframework.integration.monitor.DirectChannelMetrics.monitorSend(DirectChannelMetrics.java:113)	at org.springframework.integration.monitor.DirectChannelMetrics.doInvoke(DirectChannelMetrics.java:97)	at org.springframework.integration.monitor.DirectChannelMetrics.invoke(DirectChannelMetrics.java:91)	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)	at com.sun.proxy.$Proxy63.send(Unknown Source)	at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:109)	at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:44)	at org.springframework.messaging.core.AbstractMessageSendingTemplate.send(AbstractMessageSendingTemplate.java:94)	at org.springframework.integration.handler.AbstractReplyProducingMessageHandler.sendMessage(AbstractReplyProducingMessageHandler.java:260)	at org.springframework.integration.handler.AbstractReplyProducingMessageHandler.sendReplyMessage(AbstractReplyProducingMessageHandler.java:241)	at org.springframework.integration.handler.AbstractReplyProducingMessageHandler.produceReply(AbstractReplyProducingMessageHandler.java:205)	at org.springframework.integration.handler.AbstractReplyProducingMessageHandler.handleResult(AbstractReplyProducingMessageHandler.java:199)	at org.springframework.integration.handler.AbstractReplyProducingMessageHandler.handleMessageInternal(AbstractReplyProducingMessageHandler.java:177)	at org.springframework.integration.handler.AbstractMessageHandler.handleMessage(AbstractMessageHandler.java:78)	at org.springframework.integration.dispatcher.AbstractDispatcher.tryOptimizedDispatch(AbstractDispatcher.java:116)	at org.springframework.integration.dispatcher.UnicastingDispatcher.doDispatch(UnicastingDispatcher.java:101)	at org.springframework.integration.dispatcher.UnicastingDispatcher.dispatch(UnicastingDispatcher.java:97)	at org.springframework.integration.channel.AbstractSubscribableChannel.doSend(AbstractSubscribableChannel.java:77)	at org.springframework.integration.channel.AbstractMessageChannel.send(AbstractMessageChannel.java:255)	at org.springframework.xd.dirt.integration.redis.RedisMessageBus$1$1.doWithRetry(RedisMessageBus.java:284)	at org.springframework.xd.dirt.integration.redis.RedisMessageBus$1$1.doWithRetry(RedisMessageBus.java:280)	at org.springframework.retry.support.RetryTemplate.doExecute(RetryTemplate.java:263)	at org.springframework.retry.support.RetryTemplate.execute(RetryTemplate.java:168)	at org.springframework.xd.dirt.integration.redis.RedisMessageBus$1.doSend(RedisMessageBus.java:280)	at org.springframework.integration.channel.AbstractMessageChannel.send(AbstractMessageChannel.java:255)	at org.springframework.integration.channel.AbstractMessageChannel.send(AbstractMessageChannel.java:223)	at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:109)	at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:44)	at org.springframework.messaging.core.AbstractMessageSendingTemplate.send(AbstractMessageSendingTemplate.java:94)	at org.springframework.integration.endpoint.MessageProducerSupport.sendMessage(MessageProducerSupport.java:98)	at org.springframework.integration.redis.inbound.RedisQueueMessageDrivenEndpoint.popMessageAndSend(RedisQueueMessageDrivenEndpoint.java:211)	at org.springframework.integration.redis.inbound.RedisQueueMessageDrivenEndpoint.access$300(RedisQueueMessageDrivenEndpoint.java:50)	at org.springframework.integration.redis.inbound.RedisQueueMessageDrivenEndpoint$ListenerTask.run(RedisQueueMessageDrivenEndpoint.java:290)	at org.springframework.integration.util.ErrorHandlingTaskExecutor$1.run(ErrorHandlingTaskExecutor.java:52)	at java.lang.Thread.run(Thread.java:744)