Mycat load data infile总是失败，不知道什么原因，求大神解答

Question

mycat采用load data infile方法数据迁移，过程中报错，日志如下：
2017-12-01 11:48:39.919 WARN $_NIOREACTOR-2-RW) - caught err:
java.lang.NullPointerException
at io.mycat.net.AbstractConnection.checkWriteBuffer(AbstractConnection.java:456) ~[Mycat-server-1.6-RELEASE.jar:?]
at io.mycat.net.mysql.BinaryPacket.write(BinaryPacket.java:68) ~[Mycat-server-1.6-RELEASE.jar:?]
at io.mycat.backend.mysql.LoadDataUtil.writeToBackConnection(LoadDataUtil.java:94) ~[Mycat-server-1.6-RELEASE.jar:?]
at io.mycat.backend.mysql.LoadDataUtil.requestFileDataResponse(LoadDataUtil.java:50) ~[Mycat-server-1.6-RELEASE.jar:?]
at io.mycat.backend.mysql.nio.handler.MultiNodeQueryHandler.requestDataResponse(MultiNodeQueryHandler.java:734) ~[Mycat-server-1.6-RELEASE.jar:?]
at io.mycat.backend.mysql.nio.MySQLConnectionHandler.handleRequestPacket(MySQLConnectionHandler.java:179) ~[Mycat-server-1.6-RELEASE.jar:?]
at io.mycat.backend.mysql.nio.MySQLConnectionHandler.handleData(MySQLConnectionHandler.java:101) ~[Mycat-server-1.6-RELEASE.jar:?]
at io.mycat.net.handler.BackendAsyncHandler.offerData(BackendAsyncHandler.java:36) ~[Mycat-server-1.6-RELEASE.jar:?]
at io.mycat.backend.mysql.nio.MySQLConnectionHandler.handle(MySQLConnectionHandler.java:80) ~[Mycat-server-1.6-RELEASE.jar:?]
at io.mycat.net.AbstractConnection.handle(AbstractConnection.java:263) ~[Mycat-server-1.6-RELEASE.jar:?]
at io.mycat.net.AbstractConnection.onReadData(AbstractConnection.java:321) ~[Mycat-server-1.6-RELEASE.jar:?]
at io.mycat.net.NIOSocketWR.asynRead(NIOSocketWR.java:190) ~[Mycat-server-1.6-RELEASE.jar:?]
at io.mycat.net.AbstractConnection.asynRead(AbstractConnection.java:273) ~[Mycat-server-1.6-RELEASE.jar:?]
at io.mycat.net.NIOReactor$RW.run(NIOReactor.java:102) ~[Mycat-server-1.6-RELEASE.jar:?]
at java.lang.Thread.run(Thread.java:745) [?:1.7.0_80]
2017-12-01 11:48:39.948 INFO $_NIOREACTOR-2-RW) - close connection,reason:program err:java.lang.NullPointerException ,MySQLConnection [id=6, lastTime=1512100119275, user=root, schema=log_db_2017-11, old shema=log_db_2017-11, borrowed=true, fromSlaveDB=false, threadId=58, charset=gbk, txIsolation=3, autocommit=true, attachment=dn8{LOAD DATA LOCAL INFILE 'C:\Users\User\Desktop\log_file_manage_4-9.txt' INTO TABLE log_file_manage CHARACTER SET 'utf8' COLUMNS ESCAPED BY '%' (uuid, client_number, customer_id, decode_flag, analysis_flag, file_name, file_path, upload_time, sys_number, sys_name, sys_path, sys_version, result, operate_time, line_begin, line_end, vdi_info)}, respHandler=io.mycat.backend.mysql.nio.handler.MultiNodeQueryHandler@4c156b4b, host=localhost, port=3306, statusSync=io.mycat.backend.mysql.nio.MySQLConnection$StatusSync@12372ff3, writeQueue=0, modifiedSQLExecuted=true]
2017-12-01 11:48:40.254 WARN $_NIOREACTOR-2-RW) - caught err:
java.lang.NullPointerException
at io.mycat.net.AbstractConnection.writeToBuffer(AbstractConnection.java:475) ~[Mycat-server-1.6-RELEASE.jar:?]
at io.mycat.net.AbstractConnection.write(AbstractConnection.java:417) ~[Mycat-server-1.6-RELEASE.jar:?]
at io.mycat.backend.mysql.LoadDataUtil.requestFileDataResponse(LoadDataUtil.java:62) ~[Mycat-server-1.6-RELEASE.jar:?]
at io.mycat.backend.mysql.nio.handler.MultiNodeQueryHandler.requestDataResponse(MultiNodeQueryHandler.java:734) ~[Mycat-server-1.6-RELEASE.jar:?]
at io.mycat.backend.mysql.nio.MySQLConnectionHandler.handleRequestPacket(MySQLConnectionHandler.java:179) ~[Mycat-server-1.6-RELEASE.jar:?]
at io.mycat.backend.mysql.nio.MySQLConnectionHandler.handleData(MySQLConnectionHandler.java:101) ~[Mycat-server-1.6-RELEASE.jar:?]
at io.mycat.net.handler.BackendAsyncHandler.offerData(BackendAsyncHandler.java:36) ~[Mycat-server-1.6-RELEASE.jar:?]
at io.mycat.backend.mysql.nio.MySQLConnectionHandler.handle(MySQLConnectionHandler.java:80) ~[Mycat-server-1.6-RELEASE.jar:?]
at io.mycat.net.AbstractConnection.handle(AbstractConnection.java:263) ~[Mycat-server-1.6-RELEASE.jar:?]
at io.mycat.net.AbstractConnection.onReadData(AbstractConnection.java:321) ~[Mycat-server-1.6-RELEASE.jar:?]
at io.mycat.net.NIOSocketWR.asynRead(NIOSocketWR.java:190) ~[Mycat-server-1.6-RELEASE.jar:?]
at io.mycat.net.AbstractConnection.asynRead(AbstractConnection.java:273) ~[Mycat-server-1.6-RELEASE.jar:?]
at io.mycat.net.NIOReactor$RW.run(NIOReactor.java:102) ~[Mycat-server-1.6-RELEASE.jar:?]
at java.lang.Thread.run(Thread.java:745) [?:1.7.0_80]

哪位大神能帮忙看看，不尽感谢。