Today, I reported such an error when uploading files to Hadoop

2022-03-17 17:17:11,994 INFO hdfs.DataStreamer: Exception in createBlockOutputStream blk_1073741946_1137
java.io.IOException: Got error, status=ERROR, status message , ack with firstBadLink as 120.78.239.136:9866
	at org.apache.hadoop.hdfs.protocol.datatransfer.DataTransferProtoUtil.checkBlockOpStatus(DataTransferProtoUtil.java:134)
	at org.apache.hadoop.hdfs.protocol.datatransfer.DataTransferProtoUtil.checkBlockOpStatus(DataTransferProtoUtil.java:110)
	at org.apache.hadoop.hdfs.DataStreamer.createBlockOutputStream(DataStreamer.java:1778)
	at org.apache.hadoop.hdfs.DataStreamer.nextBlockOutputStream(DataStreamer.java:1679)
	at org.apache.hadoop.hdfs.DataStreamer.run(DataStreamer.java:716)
2022-03-17 17:17:11,998 WARN hdfs.DataStreamer: Abandoning BP-1890970308-172.25.12.163-1646541195774:blk_1073741946_1137
2022-03-17 17:17:12,007 WARN hdfs.DataStreamer: Excluding datanode DatanodeInfoWithStorage[120.78.239.136:9866,DS-87287b18-21ac-4314-884e-d78b139945b8,DISK]

The result is that

slave1 has no copy

Reason and Solution:

slave1 did not turn off the firewall, so just turning off the firewall will be OK.

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