CDH 丢失块及副本不足的块

雨点打透心脏的1/2处 2022-11-07 05:29 199阅读 0赞

备注:  
CDH 6.3.1

### 文章目录 ###

*  一.问题描述
 *  二.解决方案
 *   *  2.1 丢失块查找
     *  2.2 解决oozie副本块不足的问题
     *   *  2.2.1 设置3个副本模式
         *  2.2.2 删除坏的块:
 *  参考

# 一.问题描述 #

如下图所示，刚安装的CDH,提示存在丢失块，也存在副本不足的块  
![image.png][]

# 二.解决方案 #

## 2.1 丢失块查找 ##

sudo -u hdfs hadoop fsck / -files -blocks

测试记录:

FSCK started by hdfs (auth:SIMPLE) from /10.31.1.123 for path / at Fri Nov 27 09:55:15 CST 2020
    / <dir>
    /tmp <dir>
    /tmp/.cloudera_health_monitoring_canary_files <dir>
    /tmp/.cloudera_health_monitoring_canary_files/.canary_file_2020_11_19-14_47_30.2b73c248cbe340c5 0 bytes, replicated: replication=3, 0 block(s):  OK
    
    /tmp/.cloudera_health_monitoring_canary_files/.canary_file_2020_11_19-14_48_30.f8637315419b1c8e 0 bytes, replicated: replication=3, 0 block(s):  OK
    
    /tmp/hive <dir>
    /tmp/hive/anonymous <dir>
    /tmp/hive/anonymous/5245f213-70eb-45d2-970f-1db033fbafad <dir>
    /tmp/hive/anonymous/5245f213-70eb-45d2-970f-1db033fbafad/_tmp_space.db <dir>
    /tmp/hive/anonymous/83ac2b81-64c8-4a4e-832f-c1f933cea7eb <dir>
    /tmp/hive/anonymous/83ac2b81-64c8-4a4e-832f-c1f933cea7eb/_tmp_space.db <dir>
    /tmp/hive/anonymous/83ac2b81-64c8-4a4e-832f-c1f933cea7eb/_tmp_space.db/Values__Tmp__Table__1 <dir>
    /tmp/hive/anonymous/83ac2b81-64c8-4a4e-832f-c1f933cea7eb/_tmp_space.db/Values__Tmp__Table__1/data_file 22 bytes, replicated: replication=3, 1 block(s):  OK
    0. BP-157751563-10.31.1.123-1605413961809:blk_1073749568_8744 len=22 Live_repl=3
    
    /tmp/hive/hive <dir>
    /tmp/hive/hive/0988ee1b-25eb-43a4-b8cd-d0d7e43a457e <dir>
    /tmp/hive/hive/0988ee1b-25eb-43a4-b8cd-d0d7e43a457e/_tmp_space.db <dir>
    /tmp/hive/hive/11709f3e-a78b-4f6c-9d85-214474b0a566 <dir>
    /tmp/hive/hive/11709f3e-a78b-4f6c-9d85-214474b0a566/_tmp_space.db <dir>
    /tmp/hive/hive/190fef6f-a879-4fe3-8861-510701ce0c62 <dir>
    /tmp/hive/hive/190fef6f-a879-4fe3-8861-510701ce0c62/_tmp_space.db <dir>
    /tmp/hive/hive/1d83563c-8b79-4fea-9dec-22a3d1e0454b <dir>
    /tmp/hive/hive/1d83563c-8b79-4fea-9dec-22a3d1e0454b/_tmp_space.db <dir>
    /tmp/hive/hive/4f781ef4-b9da-4515-84f4-ff8037dd6e23 <dir>
    /tmp/hive/hive/4f781ef4-b9da-4515-84f4-ff8037dd6e23/_tmp_space.db <dir>
    **中间省略N多输出**
    /user/yarn <dir>
    /user/yarn/mapreduce <dir>
    /user/yarn/mapreduce/mr-framework <dir>
    /user/yarn/mapreduce/mr-framework/3.0.0-cdh6.3.1-mr-framework.tar.gz 235053931 bytes, replicated: replication=3, 2 block(s):  OK
    0. BP-157751563-10.31.1.123-1605413961809:blk_1073766370_25546 len=134217728 Live_repl=3
    1. BP-157751563-10.31.1.123-1605413961809:blk_1073766371_25547 len=100836203 Live_repl=3
    
    
    Status: CORRUPT
     Number of data-nodes:  4
     Number of racks:               1
     Total dirs:                    2108
     Total symlinks:                0
    
    Replicated Blocks:
     Total size:    128560763438 B
     Total files:   2187
     Total blocks (validated):      3112 (avg. block size 41311299 B)
      ********************************
      UNDER MIN REPL'D BLOCKS:      1814 (58.29049 %)
      dfs.namenode.replication.min: 1
      CORRUPT FILES:        1814
      MISSING BLOCKS:       1814
      MISSING SIZE:         1519384904 B
      ********************************
     Minimally replicated blocks:   1298 (41.70951 %)
     Over-replicated blocks:        0 (0.0 %)
     Under-replicated blocks:       0 (0.0 %)
     Mis-replicated blocks:         0 (0.0 %)
     Default replication factor:    3
     Average block replication:     1.2512853
     Missing blocks:                1814
     Corrupt blocks:                0
     Missing replicas:              0 (0.0 %)
     Blocks queued for replication: 0
    
    Erasure Coded Block Groups:
     Total size:    0 B
     Total files:   0
     Total block groups (validated):        0
     Minimally erasure-coded block groups:  0
     Over-erasure-coded block groups:       0
     Under-erasure-coded block groups:      0
     Unsatisfactory placement block groups: 0
     Average block group size:      0.0
     Missing block groups:          0
     Corrupt block groups:          0
     Missing internal blocks:       0
     Blocks queued for replication: 0
    FSCK ended at Fri Nov 27 09:55:15 CST 2020 in 47 milliseconds
    
    
    The filesystem under path '/' is CORRUPT

**过滤出 MISSING的信息**  
可以看到都是oozie这个空间丢失的块

/user/oozie/share/lib/lib_20201115122055/distcp/hadoop-distcp.jar 4038448 bytes, replicated: replication=3, 1 block(s):  MISSING 1 blocks of total size 4038448 B
    0. BP-157751563-10.31.1.123-1605413961809:blk_1073741831_1007 len=4038448 MISSING!
    /user/oozie/share/lib/lib_20201115122055/distcp/netty-all-4.1.17.Final.jar 3780056 bytes, replicated: replication=3, 1 block(s):  MISSING 1 blocks of total size 3780056 B
    0. BP-157751563-10.31.1.123-1605413961809:blk_1073741829_1005 len=3780056 MISSING!
    /user/oozie/share/lib/lib_20201115122055/distcp/oozie-sharelib-distcp-5.1.0-cdh6.3.1.jar 12759 bytes, replicated: replication=3, 1 block(s):  MISSING 1 blocks of total size 12759 B
    0. BP-157751563-10.31.1.123-1605413961809:blk_1073741826_1002 len=12759 MISSING!
    /user/oozie/share/lib/lib_20201115122055/distcp/oozie-sharelib-distcp.jar 12759 bytes, replicated: replication=3, 1 block(s):  MISSING 1 blocks of total size 12759 B
    0. BP-157751563-10.31.1.123-1605413961809:blk_1073741830_1006 len=12759 MISSING!
    /user/oozie/share/lib/lib_20201115122055/git/HikariCP-2.6.1.jar 133942 bytes, replicated: replication=3, 1 block(s):  MISSING 1 blocks of total size 133942 B
    0. BP-157751563-10.31.1.123-1605413961809:blk_1073741832_1008 len=133942 MISSING!
    **中间省略部分输出**
    0. BP-157751563-10.31.1.123-1605413961809:blk_1073743627_2803 len=18161 MISSING!
    /user/oozie/share/lib/lib_20201115122055/sqoop/xz-1.6.jar 103131 bytes, replicated: replication=3, 1 block(s):  MISSING 1 blocks of total size 103131 B
    0. BP-157751563-10.31.1.123-1605413961809:blk_1073743633_2809 len=103131 MISSING!
    /user/oozie/share/lib/lib_20201115122055/sqoop/zookeeper.jar 1543701 bytes, replicated: replication=3, 1 block(s):  MISSING 1 blocks of total size 1543701 B
    0. BP-157751563-10.31.1.123-1605413961809:blk_1073743638_2814 len=1543701 MISSING!
      MISSING BLOCKS:       1814
      MISSING SIZE:         1519384904 B

## 2.2 解决oozie副本块不足的问题 ##

查看丢失的文件块信息

[root@hp1 ~]# hadoop dfs -ls /user/oozie/share/lib/lib_20201115122055/hive2/jcodings-1.0.18.jar  
    WARNING: Use of this script to execute dfs is deprecated.
    WARNING: Attempting to execute replacement "hdfs dfs" instead.
    
    -rwxrwxr-x   3 oo

导致这个问题产生时是由于初始化集群后，只有两个节点的datanode，所以将副本调整为2 、dfs.replication=2，在切换后对hdfs做了抑制，导致告警出现；现在重新加入一个datanode，重新恢复3个datanode节点3副本模式。

### 2.2.1 设置3个副本模式 ###

sudo -u hdfs hadoop fs -setrep -R 3 /

### 2.2.2 删除坏的块: ###

-- 删除损坏的块
    sudo -u hdfs hadoop fsck / -delete  
    -- 列出损坏的块
    sudo -u hdfs hadoop fsck -list-corruptfileblocks

测试记录:

[root@hp1 ~]# sudo -u hdfs hadoop fsck -list-corruptfileblocks
    WARNING: Use of this script to execute fsck is deprecated.
    WARNING: Attempting to execute replacement "hdfs fsck" instead.
    
    Connecting to namenode via http://hp1:9870/fsck?ugi=hdfs&listcorruptfileblocks=1&path=%2F
    The filesystem under path '/' has 0 CORRUPT files

现在看丢失块的问题解决:  
![image.png][image.png 1]

# 参考 #

1.https://www.cnblogs.com/hqt0731/articles/8804924.html

[image.png]: /images/20221023/e0be31e57cb841d5988aabdf84cd3560.png
[image.png 1]: /images/20221023/9fa262dd265c43088fd5c59537af3aa7.png