Following Node is down..Please have look on datanode logs and try to make it up...Before going for further action..(like decreasing the replication factor..)
Dead datanodes: Name: 172.18.126.99:50010 (nsda3dmsrpt02.internal.bigpond.com) ________________________________ From: Phan, Truong Q [troung.p...@team.telstra.com] Sent: Thursday, March 20, 2014 10:39 AM To: user@hadoop.apache.org Subject: RE: how to free up space of the old Data Node Hi Battula, I hope Battula is your first name. :P Here are the output of your suggested commands: [root@nsda3dmsrpt02] /usr/lib/hadoop-0.20-mapreduce# sudo -u hdfs hadoop fsck / DEPRECATED: Use of this script to execute hdfs command is deprecated. Instead use the hdfs command for it. Connecting to namenode via http://nsda3dmsrpt02.internal.bigpond.com:50070 FSCK started by hdfs (auth:SIMPLE) from /172.18.126.99 for path / at Thu Mar 20 16:04:35 EST 2014 Status: CORRUPT Total size: 7325542923 B Total dirs: 138 Total files: 383 Total symlinks: 0 (Files currently being written: 2) Total blocks (validated): 424 (avg. block size 17277223 B) ******************************** CORRUPT FILES: 3 MISSING BLOCKS: 3 MISSING SIZE: 791 B CORRUPT BLOCKS: 3 ******************************** Minimally replicated blocks: 421 (99.29245 %) Over-replicated blocks: 0 (0.0 %) Under-replicated blocks: 417 (98.34906 %) Mis-replicated blocks: 0 (0.0 %) Default replication factor: 3 Average block replication: 1.976415 Corrupt blocks: 3 Missing replicas: 417 (33.147854 %) Number of data-nodes: 2 Number of racks: 1 FSCK ended at Thu Mar 20 16:04:35 EST 2014 in 105 milliseconds The filesystem under path '/' is CORRUPT [root@nsda3dmsrpt02] /usr/lib/hadoop-0.20-mapreduce# sudo -u hdfs hadoop dfsadmin -report DEPRECATED: Use of this script to execute hdfs command is deprecated. Instead use the hdfs command for it. Configured Capacity: 1100387597518 (1.00 TB) Present Capacity: 727189155840 (677.25 GB) DFS Remaining: 712401227776 (663.48 GB) DFS Used: 14787928064 (13.77 GB) DFS Used%: 2.03% Under replicated blocks: 420 Blocks with corrupt replicas: 0 Missing blocks: 3 ------------------------------------------------- Datanodes available: 2 (3 total, 1 dead) Live datanodes: Name: 172.18.127.248:50010 (bpdevdmsdbs02) Hostname: bpdevdmsdbs02 Rack: /default Decommission Status : Normal Configured Capacity: 550193798759 (512.41 GB) DFS Used: 7394033664 (6.89 GB) Non DFS Used: 169131224679 (157.52 GB) DFS Remaining: 373668540416 (348.01 GB) DFS Used%: 1.34% DFS Remaining%: 67.92% Last contact: Thu Mar 20 16:05:44 EST 2014 Name: 172.18.127.245:50010 (bpdevdmsdbs01) Hostname: bpdevdmsdbs01 Rack: /default Decommission Status : Normal Configured Capacity: 550193798759 (512.41 GB) DFS Used: 7393894400 (6.89 GB) Non DFS Used: 204067216999 (190.05 GB) DFS Remaining: 338732687360 (315.47 GB) DFS Used%: 1.34% DFS Remaining%: 61.57% Last contact: Thu Mar 20 16:05:44 EST 2014 Dead datanodes: Name: 172.18.126.99:50010 (nsda3dmsrpt02.internal.bigpond.com) Hostname: nsda3dmsrpt02.internal.bigpond.com Rack: /default Decommission Status : Normal Configured Capacity: 0 (0 B) DFS Used: 0 (0 B) Non DFS Used: 0 (0 B) DFS Remaining: 0 (0 B) DFS Used%: 100.00% DFS Remaining%: 0.00% Last contact: Wed Mar 19 11:44:44 EST 2014 Thanks and Regards, Truong Phan P + 61 2 8576 5771 M + 61 4 1463 7424 E troung.p...@team.telstra.com W www.telstra.com<https://email-cn.huawei.com/owa/UrlBlockedError.aspx> From: Brahma Reddy Battula [mailto:brahmareddy.batt...@huawei.com] Sent: Thursday, 20 March 2014 3:27 PM To: user@hadoop.apache.org Subject: RE: how to free up space of the old Data Node Please check my inline comments which are in blue color... ________________________________ From: Phan, Truong Q [troung.p...@team.telstra.com] Sent: Thursday, March 20, 2014 8:04 AM To: user@hadoop.apache.org<mailto:user@hadoop.apache.org> Subject: how to free up space of the old Data Node Hi I have 3 nodes Hadoop cluster in which I created 3 Data Nodes. However, I don’t have enough space in one of the node to cater other projects’ log. So I decommissioned this node from a Data node list but I could not re-claimed the space from it. >>> is your Replication is 3..? If it is 3 and as you have 3 datanodes,ideally >>> disk space occupied by all nodes should be same(47G, should be present in >>> all the DN's).. >>>And if you RF=3,Decommission will not be success as you've only 3 DN's..you >>>need to add another DN to cluster,,then only decommission will be success.. Hence please mention the replication factor of the file.. Is there a way to get this node to release space? >>> ways are there,,but you need to mention, why only this node disk is >>> full..why not other nodes..? is it because,this node is having less space >>> compared to other nodes >>> If RF=3, then make RF=2(decrease the replication factor)..then do >>> decommission of this node [root@nsda3dmsrpt02] /data/dfs/dn# du -sh /data/dfs/dn/* 47G /data/dfs/dn/current >>> try to give the following output also sudo -u hdfs hadoop fsck / sudo -u hdfs hadoop dfsadmin -report $ sudo -u hdfs hadoop fsck /data DEPRECATED: Use of this script to execute hdfs command is deprecated. Instead use the hdfs command for it. Status: HEALTHY Total size: 7186453688 B Total dirs: 11 Total files: 62 Total symlinks: 0 Total blocks (validated): 105 (avg. block size 68442416 B) Minimally replicated blocks: 105 (100.0 %) Over-replicated blocks: 0 (0.0 %) Under-replicated blocks: 105 (100.0 %) Mis-replicated blocks: 0 (0.0 %) Default replication factor: 3 Average block replication: 2.0 Corrupt blocks: 0 Missing replicas: 105 (33.333332 %) Number of data-nodes: 2 Number of racks: 1 FSCK ended at Thu Mar 20 13:30:03 EST 2014 in 22 milliseconds The filesystem under path '/data' is HEALTHY Thanks and Regards, Truong Phan Senior Technology Specialist Database Engineering Transport & Routing Engineering | Networks | Telstra Operations [Telstra] P + 61 2 8576 5771 M + 61 4 1463 7424 E troung.p...@team.telstra.com<mailto:troung.p...@team.telstra.com> W www.telstra.com<https://email-cn.huawei.com/owa/UrlBlockedError.aspx> Love the movies? Telstra takes you there with $10 movie tickets, just to say thanks. 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