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Bigdata, Semantic IoT, Hadoop, NoSQL

Bigdata, Hadoop ecosystem, Semantic IoT등의 프로젝트를 진행중에 습득한 내용을 정리하는 곳입니다.
필요한 분을 위해서 공개하고 있습니다. 문의사항은 gooper@gooper.com로 메일을 보내주세요.


1. hdfs-site.xml과 yarn-site.xml의 설정을 다시 확인한다.

 가. hdfs-site.xml

   <property>
     <name>dfs.hosts.exclude</name>
     <value>$HOME/hadoop/etc/hadoop/nodes.exclude</value>
   </property>
   <property>
     <name>dfs.host</name>
     <value>$HOME/hadoop/etc/hadoop/nodes.include</value>
   </property>


 나. yarn-site.xml

  <property>
   <name>yarn.resourcemanager.nodes.include-path</name>
   <value$HOME/hadoop/etc/hadoop/nodes.include</value>
  </property>
  <property>
   <name>yarn.resourcemanager.nodes.exclude-path</name>
   <value$HOME/hadoop/etc/hadoop/nodes.exclude</value>
  </property>


2. hdfs fsck -storagepolicies 혹은 hdfs fsck -blocks / 를 실행하여 Block의 상태를 확인한다.

 결과는 하단 참조


3. 2의 결과가 Status: CORRUPT이면 적절한 조치를 취한다.

 hdfs fsck -delete 혹은 hdfs fsck -move


4. 2을 다시 실행하여 Status: HEALTHY인지 확인한다.

  결과는 하단 참조


5. 필요시 Decommission과정을 다시 수행한다.

hdfs dfsadmin -refreshNodes

yarn rmadmin -refreshNodes


* Decommission이 수일 혹은 수주 동안 진행될수도 있는데 속도를 증가시키는 방법으로 hdfs-site.xml에 다음을 추가/반영시켜준다.

   (참고 : https://community.hortonworks.com/questions/102621/node-decommissioning-progressing-too-slowly.html)

   <property>
     <name>dfs.namenode.replication.max-streams</name>
     <value>50</value>
   </property>
  
   <property>
     <name>dfs.namenode.replication.max-streams-hard-limit</name>
     <value>100</value>
   </property>
  
   <property>
     <name>dfs.namenode.replication.work.multiplier.per.iteration</name>
     <value>200</value>
   </property>



-----------hdfs fsck -storagepolicies실행 결과(Status: CORRUPT)----------

.....

(생략)

....

/user/hadoop/spark/local-1510393605261: MISSING 1 blocks of total size 134217728 B......
/user/hadoop/spark/local-1511150952538:  Under replicated BP-605282214-166.104.112.43-1498555165989:blk_1078958243_5217532. Target Replicas is 3 but found 1 replica(s).

/user/hadoop/spark/local-1511150952538:  Under replicated BP-605282214-166.104.112.43-1498555165989:blk_1078982811_5242100. Target Replicas is 3 but found 2 replica(s).
.
/user/hadoop/spark/local-1511756383245: MISSING 1 blocks of total size 8357126 B.....
/user/hadoop/spark/local-1511848071791:  Under replicated BP-605282214-166.104.112.43-1498555165989:blk_1079042189_5301478. Target Replicas is 3 but found 2 replica(s).
..
/user/hadoop/spark/local-1511858124646: MISSING 1 blocks of total size 40291 B..
/user/hadoop/spark/local-1511858518707:  Under replicated BP-605282214-166.104.112.43-1498555165989:blk_1079043514_5302803. Target Replicas is 3 but found 1 replica(s).
....
/user/hadoop/spark/local-1511861829455:  Under replicated BP-605282214-166.104.112.43-1498555165989:blk_1079044160_5303449. Target Replicas is 3 but found 1 replica(s).
..
/user/hadoop/spark/local-1511921506635:  Under replicated BP-605282214-166.104.112.43-1498555165989:blk_1079057453_5316742. Target Replicas is 3 but found 2 replica(s).
...
/user/hadoop/spark/local-1511931435456: MISSING 1 blocks of total size 702011 B..
/user/hadoop/spark/local-1511932067927:  Under replicated BP-605282214-166.104.112.43-1498555165989:blk_1079058984_5318273. Target Replicas is 3 but found 2 replica(s).
.......
/user/hadoop/spark/local-1511939175974:  Under replicated BP-605282214-166.104.112.43-1498555165989:blk_1079060057_5319346. Target Replicas is 3 but found 2 replica(s).
...
/user/hadoop/spark/local-1511942070784:  Under replicated BP-605282214-166.104.112.43-1498555165989:blk_1079060488_5319777. Target Replicas is 3 but found 2 replica(s).
.
.
/user/hadoop/spark/local-1511945803722:  Under replicated BP-605282214-166.104.112.43-1498555165989:blk_1079061302_5320591. Target Replicas is 3 but found 2 replica(s).
.
/user/hadoop/spark/local-1511946633083:  Under replicated BP-605282214-166.104.112.43-1498555165989:blk_1079061444_5320733. Target Replicas is 3 but found 2 replica(s).
.
/user/hadoop/spark/local-1512003403329:  Under replicated BP-605282214-166.104.112.43-1498555165989:blk_1079074161_5333450. Target Replicas is 3 but found 1 replica(s).
.
/user/hadoop/spark/local-1512008787877:  Under replicated BP-605282214-166.104.112.43-1498555165989:blk_1079074799_5334088. Target Replicas is 3 but found 2 replica(s).
.
/user/hadoop/spark/local-1512018010728:  Under replicated BP-605282214-166.104.112.43-1498555165989:blk_1079076017_5335306. Target Replicas is 3 but found 2 replica(s).
............
/user/hadoop/spark/local-1512121416466:  Under replicated BP-605282214-166.104.112.43-1498555165989:blk_1079096405_5355695. Target Replicas is 3 but found 2 replica(s).
.....
/user/hadoop/spark/local-1512361519396:  Under replicated BP-605282214-166.104.112.43-1498555165989:blk_1079147739_5407029. Target Replicas is 3 but found 2 replica(s).
.....
/user/hadoop/spark/local-1512373036884:  Under replicated BP-605282214-166.104.112.43-1498555165989:blk_1079149109_5408399. Target Replicas is 3 but found 2 replica(s).
..
/user/hadoop/spark/local-1512373950155:  Under replicated BP-605282214-166.104.112.43-1498555165989:blk_1079149191_5408481. Target Replicas is 3 but found 1 replica(s).
..........................
/user/hadoop/spark/local-1512641606927:  Under replicated BP-605282214-166.104.112.43-1498555165989:blk_1079196301_5455600. Target Replicas is 3 but found 2 replica(s).
.
/user/hadoop/spark/local-1512694548543:  Under replicated BP-605282214-166.104.112.43-1498555165989:blk_1079208186_5467485. Target Replicas is 3 but found 2 replica(s).
.....
/user/hadoop/spark/local-1512712721899:  Under replicated BP-605282214-166.104.112.43-1498555165989:blk_1079272068_5531367. Target Replicas is 3 but found 2 replica(s).
.....
/user/hadoop/spark/local-1512978676213:  Under replicated BP-605282214-166.104.112.43-1498555165989:blk_1079331781_5591080. Target Replicas is 3 but found 2 replica(s).
...
/user/hadoop/spark/local-1513040318768:  Under replicated BP-605282214-166.104.112.43-1498555165989:blk_1079345530_5604829. Target Replicas is 3 but found 2 replica(s).
...
/user/hadoop/spark/local-1513154800735:  Under replicated BP-605282214-166.104.112.43-1498555165989:blk_1079372104_5631403. Target Replicas is 3 but found 1 replica(s).
..
/user/hadoop/spark/local-1513239737761:  Under replicated BP-605282214-166.104.112.43-1498555165989:blk_1079391263_5650563. Target Replicas is 3 but found 2 replica(s).

/user/hadoop/spark/local-1513239737761:  Under replicated BP-605282214-166.104.112.43-1498555165989:blk_1079416745_5676128. Target Replicas is 3 but found 1 replica(s).

/user/hadoop/spark/local-1513239737761:  Under replicated BP-605282214-166.104.112.43-1498555165989:blk_1079454497_5713964. Target Replicas is 3 but found 1 replica(s).
....
/user/hadoop/spark/local-1513933165296:  Under replicated BP-605282214-166.104.112.43-1498555165989:blk_1079584889_5844405. Target Replicas is 3 but found 1 replica(s).
...
/user/pineone/gooper-test/icbms_2017-07-21_13-28-17.nq.gz:  Under replicated BP-605282214-166.104.112.43-1498555165989:blk_1076598010_2857261. Target Replicas is 3 but found 2 replica(s).
.....
/user/pineone/in/tomcat-juli.jar:  Under replicated BP-605282214-166.104.112.43-1498555165989:blk_1073741825_1001. Target Replicas is 3 but found 2 replica(s).
.......
/user/pineone/out3/part-r-00000:  Under replicated BP-605282214-166.104.112.43-1498555165989:blk_1073744812_3988. Target Replicas is 3 but found 2 replica(s).
.......
.....Status: CORRUPT
 Total size:    1136215827409 B (Total open files size: 939529123 B)
 Total dirs:    1415
 Total files:   1864205
 Total symlinks:                0 (Files currently being written: 12)
 Total blocks (validated):      1864295 (avg. block size 609461 B) (Total open file blocks (not validated): 18)
  ********************************
  UNDER MIN REPL'D BLOCKS:      11 (5.900354E-4 %)
  dfs.namenode.replication.min: 1
  CORRUPT FILES:        11
  MISSING BLOCKS:       11
  MISSING SIZE:         321480184 B
  ********************************
 Minimally replicated blocks:   1864284 (99.99941 %)
 Over-replicated blocks:        0 (0.0 %)
 Under-replicated blocks:       545406 (29.255348 %)
 Mis-replicated blocks:         0 (0.0 %)
 Default replication factor:    3
 Average block replication:     2.661861
 Corrupt blocks:                0
 Missing replicas:              630358 (11.270713 %)
 Number of data-nodes:          8
 Number of racks:               1
FSCK ended at Tue Jan 02 15:42:32 KST 2018 in 196868 milliseconds
FSCK ended at Tue Jan 02 15:42:32 KST 2018 in 196868 milliseconds
fsck encountered internal errors!


Fsck on path '/' FAILED



-----------hdfs fsck -storagepolicies실행 결과(Status: HEALTHY)----------

.....

(생략)

....

/user/hadoop/spark/local-1513239737761:  Under replicated BP-605282214-166.104.112.43-1498555165989:blk_1079416745_5676128. Target Replicas is 3 but found 1 replica(s).

/user/hadoop/spark/local-1513239737761:  Under replicated BP-605282214-166.104.112.43-1498555165989:blk_1079454497_5713964. Target Replicas is 3 but found 1 replica(s).
....
/user/hadoop/spark/local-1513933165296:  Under replicated BP-605282214-166.104.112.43-1498555165989:blk_1079584889_5844405. Target Replicas is 3 but found 1 replica(s).
...
/user/hadoop/spark/local-1514451281961:  Under replicated BP-605282214-166.104.112.43-1498555165989:blk_1079748353_6021470. Target Replicas is 3 but found 1 replica(s).
.
/user/pineone/gooper-test/icbms_2017-07-21_13-28-17.nq.gz:  Under replicated BP-605282214-166.104.112.43-1498555165989:blk_1076598010_2857261. Target Replicas is 3 but found 2 replica(s).
.....
/user/pineone/in/tomcat-juli.jar:  Under replicated BP-605282214-166.104.112.43-1498555165989:blk_1073741825_1001. Target Replicas is 3 but found 2 replica(s).
.......
/user/pineone/out3/part-r-00000:  Under replicated BP-605282214-166.104.112.43-1498555165989:blk_1073744812_3988. Target Replicas is 3 but found 2 replica(s).
........
....Status: HEALTHY
 Total size:    1136067627332 B (Total open files size: 1312 B)
 Total dirs:    1446
 Total files:   1864304
 Total symlinks:                0 (Files currently being written: 4)
 Total blocks (validated):      1864376 (avg. block size 609355 B) (Total open file blocks (not validated): 3)
 Minimally replicated blocks:   1864376 (100.0 %)
 Over-replicated blocks:        0 (0.0 %)
 Under-replicated blocks:       526644 (28.247736 %)
 Mis-replicated blocks:         0 (0.0 %)
 Default replication factor:    3
 Average block replication:     2.682025
 Corrupt blocks:                0
 Missing replicas:              592825 (10.599168 %)
 Number of data-nodes:          8
 Number of racks:               1

Blocks satisfying the specified storage policy:
Storage Policy                  # of blocks       % of blocks
DISK:5(HOT)                   796652              42.7302%
DISK:3(HOT)                   595925              31.9638%
DISK:4(HOT)                   471514              25.2907%
DISK:6(HOT)                      274               0.0147%
DISK:1(HOT)                       10               0.0005%
DISK:2(HOT)                        1               0.0001%

All blocks satisfy specified storage policy.
FSCK ended at Tue Jan 02 17:08:00 KST 2018 in 184737 milliseconds


The filesystem under path '/' is HEALTHY

번호 제목 글쓴이 날짜 조회 수
496 hadoop 클러스터 실행 스크립트 정리 총관리자 2018.03.20 608
495 HA(Namenode, ResourceManager, Kerberos) 및 보안(Zookeeper, Hadoop) 총관리자 2018.03.16 93
494 자주쓰는 유용한 프로그램 총관리자 2018.03.16 1246
493 에러 추적(Error Tracking) 및 로그 취합(logging aggregation) 시스템인 Sentry 설치 총관리자 2018.03.14 88
492 update 샘플 총관리자 2018.03.12 810
491 이미지 관리 오픈소스 목록 총관리자 2018.03.11 145
490 Scala에서 countByWindow를 이용하기(예제) 총관리자 2018.03.08 235
489 Scala를 이용한 Streaming예제 총관리자 2018.03.08 69
488 scala application 샘플소스(SparkSession이용) 총관리자 2018.03.07 134
487 fuseki의 endpoint를 이용한 insert, delete하는 sparql예시 총관리자 2018.02.14 99
486 프로세스를 확인해서 프로세스를 삭제하는 shell script예제(cryptonight) 총관리자 2018.02.02 197
485 spark-submit 실행시 "java.lang.OutOfMemoryError: Java heap space"발생시 조치사항 총관리자 2018.02.01 509
484 Could not compute split, block input-0-1517397051800 not found형태의 오류가 발생시 조치방법 총관리자 2018.02.01 184
483 Hadoop의 Datanode를 Decommission하고 나서 HBase의 regionservers파일에 해당 노드명을 지웠는데 여전히 "Dead regionser"로 표시되는 경우 처리 총관리자 2018.01.25 234
482 https용 인증서 발급 명령문 예시및 오류 메세지 총관리자 2018.01.24 109
481 여러 홈페이지를 운영하거나 혹은 서버에 가입한 사용자들에게 홈페이지 계정을 나누어 줄수 있도록 설정/계정 생성방법 총관리자 2018.01.23 280
480 maven을 이용하여 Hello world 서비스 자동 생성시 HelloServiceImpl.java에서 사용하는 getMessage() 와 getName() 이 정의되지 않은 오류가 발생시 조치방법 총관리자 2018.01.19 166
479 Lagom에서 제공하는 Maven을 이용한 Hello프로젝트 자동생성 및 실행 총관리자 2018.01.19 81
478 lagom에서 제공하는 초기 생성기능을 이용하여 생성한 프로젝트의 소스 파악 총관리자 2018.01.16 110
477 spark stream처리할때 두개의 client프로그램이 동일한 checkpoint로 접근할때 발생하는 오류 내용 총관리자 2018.01.16 1113

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