Проблема Spring Batch: возникли проблемы при синхронизации удаленного каталога с локальным

Мы РАЗМЕЩАЕМ файл на каком-то SFTP-сервере, а затем запускаем весенний пакет. Когда были выполнены шаги весеннего пакетного запуска ниже.

1. выбрать файл из местоположения FTP

2. обработать файл.

3. удалить файл.

мы сталкиваемся с исключением ниже, когда весенняя партия выполняет вышеуказанные шаги.

ERROR org.springframework.integration.handler.LoggingHandler: 140 - org.springframework.integration.MessagingException: Problem occurred while synchronizing remote to local directory
            at org.springframework.integration.file.remote.synchronizer.AbstractInboundFileSynchronizer.synchronizeToLocalDirectory(AbstractInboundFileSynchronizer.java:189)
            at org.springframework.integration.file.remote.synchronizer.AbstractInboundFileSynchronizingMessageSource.receive(AbstractInboundFileSynchronizingMessageSource.java:162)
            at org.springframework.integration.endpoint.SourcePollingChannelAdapter.receiveMessage(SourcePollingChannelAdapter.java:111)
            at org.springframework.integration.endpoint.AbstractPollingEndpoint.doPoll(AbstractPollingEndpoint.java:184)
            at org.springframework.integration.endpoint.AbstractPollingEndpoint.access$000(AbstractPollingEndpoint.java:51)
            at org.springframework.integration.endpoint.AbstractPollingEndpoint$1.call(AbstractPollingEndpoint.java:143)
            at org.springframework.integration.endpoint.AbstractPollingEndpoint$1.call(AbstractPollingEndpoint.java:141)
            at org.springframework.integration.endpoint.AbstractPollingEndpoint$Poller$1.run(AbstractPollingEndpoint.java:273)
            at org.springframework.integration.util.ErrorHandlingTaskExecutor$1.run(ErrorHandlingTaskExecutor.java:52)
            at org.springframework.core.task.SyncTaskExecutor.execute(SyncTaskExecutor.java:48)
            at org.springframework.integration.util.ErrorHandlingTaskExecutor.execute(ErrorHandlingTaskExecutor.java:49)
            at org.springframework.integration.endpoint.AbstractPollingEndpoint$Poller.run(AbstractPollingEndpoint.java:268)
            at org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:53)
            at org.springframework.scheduling.concurrent.ReschedulingRunnable.run(ReschedulingRunnable.java:81)
            at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
            at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
            at java.util.concurrent.FutureTask.run(FutureTask.java:138)
            at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:98)
            at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:206)
            at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
            at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
            at java.lang.Thread.run(Thread.java:662)
        Caused by: org.springframework.integration.MessagingException: Failed to execute on session
            at org.springframework.integration.file.remote.RemoteFileTemplate.execute(RemoteFileTemplate.java:306)
            at org.springframework.integration.file.remote.synchronizer.AbstractInboundFileSynchronizer.synchronizeToLocalDirectory(AbstractInboundFileSynchronizer.java:163)
            ... 21 more
        Caused by: org.springframework.core.NestedIOException: Failed to remove file: 2: Specified file path is invalid.
            at org.springframework.integration.sftp.session.SftpSession.remove(SftpSession.java:83)
            at org.springframework.integration.file.remote.synchronizer.AbstractInboundFileSynchronizer.copyFileToLocalDirectory(AbstractInboundFileSynchronizer.java:230)
            at org.springframework.integration.file.remote.synchronizer.AbstractInboundFileSynchronizer.access$100(AbstractInboundFileSynchronizer.java:59)
            at org.springframework.integration.file.remote.synchronizer.AbstractInboundFileSynchronizer$1.doInSession(AbstractInboundFileSynchronizer.java:172)
            at org.springframework.integration.file.remote.synchronizer.AbstractInboundFileSynchronizer$1.doInSession(AbstractInboundFileSynchronizer.java:163)
            at org.springframework.integration.file.remote.RemoteFileTemplate.execute(RemoteFileTemplate.java:297)
            ... 22 more