向HDFS上传文件时出现异常：
INFO hdfs.DFSClient: Exception in createBlockOutputStream
java.io.IOException: Got error, status message , ack with firstBadLink as 192.168.234.132:50010
at org.apache.hadoop.hdfs.protocol.datatransfer.DataTransferProtoUtil.checkBlockOpStatus(DataTransferProtoUtil.java:142)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.createBlockOutputStream(DFSOutputStream.java:1497)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.nextBlockOutputStream(DFSOutputStream.java:1400)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:554)
18/12/21 19:36:53 INFO hdfs.DFSClient: Abandoning BP-1635234535-192.168.234.133-1545332720741:blk_1073741841_1017
18/12/21 19:36:53 INFO hdfs.DFSClient: Excluding datanode DatanodeInfoWithStorage[192.168.234.132:50010,DS-94a817d7-e6a5-4a04-b234-8650abc6437c,DISK]
我是因为异常中那个结点机器的防火墙没有关。
如果关了之后还是报错可以看一下机器的进程，看看有没有datanode在运行
如果没有的话，执行命令hadoop-daemon.sh start datanode 会启动机器上数据节点的守护进程。