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                                            bruce

任务正常启动后，数据写入一直不变，也不报错

我也遇到了类似的问题：mysql-to-hdfs，数据量比较大，跑一段时间后发现 Speed 0B/s。通过 jstack 发现存在 reader 线程卡在了 close connection。 ``` "0-0-2-reader" #25 prio=5 os_prio=0 tid=0x00007f73ac012000 nid=0x59 runnable [0x00007f73be59b000] java.lang.Thread.State: RUNNABLE at java.net.SocketInputStream.socketRead0(Native Method) at java.net.SocketInputStream.socketRead(SocketInputStream.java:116) at java.net.SocketInputStream.read(SocketInputStream.java:171) at java.net.SocketInputStream.read(SocketInputStream.java:141)...