linux_HDFS文件上传后的追加报错_hdfs appendto file 报错

一、背景描述：此时有node1，node2，node3虚拟机

                   HDFS中存在/itcast/1.txt文件

                   linux_node2中/test/下存在2.txt和3.txt

                   现在上传本地2.txt,3.txt文件到HDFS中追加到1.txt文件的末尾

二、显示报错如下：

1.第一报错

[root@node2 ~]# hadoop fs -appendToFile 2.txt 3.txt /itcast/1.txt
2023-06-06 11:22:37,011 WARN hdfs.DataStreamer: DataStreamer Exception
java.io.IOException: Failed to replace a bad datanode on the existing pipeline due to no more good datanodes being available to try. (Nodes: current=[DatanodeInfoWithStorage[192.168.88.152:9866,DS-c220bd52-1e8d-406a-ac61-8c310e39364f,DISK], DatanodeInfoWithStorage[192.168.88.151:9866,DS-115b8ce0-0944-44f6-8638-e123a08e806f,DISK]], original=[DatanodeInfoWithStorage[192.168.88.151:9866,DS-115b8ce0-0944-44f6-8638-e123a08e806f,DISK], DatanodeInfoWithStorage[192.168.88.152:9866,DS-c220bd52-1e8d-406a-ac61-8c310e39364f,DISK]]). The current failed datanode replacement policy is DEFAULT, and a client may configure this via 'dfs.client.block.write.replace-datanode-on-failure.policy' in its configuration.
        at org.apache.hadoop.hdfs.DataStreamer.findNewDatanode(DataStreamer.java:1304)
        at org.apache.hadoop.hdfs.DataStreamer.addDatanode2ExistingPipeline(DataStreamer.java:1372)
        at org.apache.hadoop.hdfs.DataStreamer.handleDatanodeReplacement(DataStreamer.java:1598)
        at org.apache.hadoop.hdfs.DataStreamer.setupPipelineInternal(DataStreamer.java:1499)
        at org.apache.hadoop.hdfs.DataStreamer.setupPipelineForAppendOrRecovery(DataStreamer.java:1481)
        at org.apache.hadoop.hdfs.DataStreamer.run(DataStreamer.java:719)
appendToFile: /root/2.txt

原因：node3的HDFS的从节点失联

解决：可以查看我其他笔记查看这个问题解决思路

2.第二个报错：

[root@node2 ~]# hadoop fs -appendToFile 2.txt 3.txt /itcast/1.txt
appendToFile: Failed to APPEND_FILE /itcast/1.txt for DFSClient_NONMAPREDUCE_-1199279342_1 on 192.168.88.152 because lease recovery is in progress. Try again later.

原因：文件的权限只有读的权限

解决：修改HDFS中的1.txt的文件权限

[root@node2 ~]# hadoop fs -chmod 777 /itcast/1.txt

3.第三个报错：

[root@node2 ~]# hadoop fs -appendToFile 2.txt 3.txt /itcast/1.txt
appendToFile: /root/2.txt

原因：发现上传拼接的路径不对，上述命令的路径不是/目录下

解决：查看文件存在的路径

           修改文件上传的路径如下

[root@node2 ~]# ll
total 24
-rw-r--r--  1 root root     0 Jun  6 08:24 1.txt
-rw-------. 1 root root  1365 Jun  4 11:52 anaconda-ks.cfg
drwxr-xr-x  2 root root    84 Jun  6 08:36 test
-rw-r--r--  1 root root 19263 Jun  4 22:00 zookeeper.out
[root@node2 ~]# cd  test
[root@node2 test]# ll
total 16
-rw-r--r-- 1 root root 2 Jun  6 08:25 1.txt
-rw-r--r-- 1 root root 2 Jun  6 08:26 2.txt
-rw-r--r-- 1 root root 2 Jun  6 08:26 3.txt
-rw-r--r-- 1 root root 6 Jun  6 08:36 merge.txt
[root@node2 test]# hadoop fs -appendToFile 2.txt 3.txt /itcast/1.txt