otter同步出错

otter一直都是正常工作的，突然一天，报了以下的错误，导致延时一天，我停用以后又 启用，正常同步了。但是很想知道是什么原因导致的。

pid:2 nid:2 exception:setl:com.alibaba.otter.node.etl.common.pipe.exception.PipeException: deserial_error Caused by: java.io.FileNotFoundException: /app/otter/node/bin/../download/DbBatch-2015-05-28-12-20-12-2-2-715816.gzip (No such file or directory) at java.io.FileInputStream.open(Native Method) at java.io.FileInputStream.(FileInputStream.java:146) at com.alibaba.otter.node.etl.common.pipe.impl.http.RowDataHttpPipe.getDbBatch(RowDataHttpPipe.java:216) at com.alibaba.otter.node.etl.common.pipe.impl.http.RowDataHttpPipe.get(RowDataHttpPipe.java:71) at com.alibaba.otter.node.etl.common.pipe.impl.RowDataPipeDelegate.get(RowDataPipeDelegate.java:128) at com.alibaba.otter.node.etl.transform.TransformTask$1.run(TransformTask.java:76) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) at java.util.concurrent.FutureTask.run(FutureTask.java:262) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:745)

原提问者GitHub用户 laopangzhang