Hi,
I've run into something awkward for me some time ago and I don't have an explanation.
I have 2 namenodes with several datanodes, but today I've just seen that I have some corrupt blocks.
What is awkward is that:
hdfs jmxget -server namenode02 -port 8006 | grep CorruptBlocks
CorruptBlocks=27
and when I've checked with hdfs fsck / , I've got:
Total size: 734930879995888 B (Total open files size: 537967073 B)
Total dirs: 1501316
Total files: 113743394
Total symlinks: 0 (Files currently being written: 137)
Total blocks (validated): 109063040 (avg. block size 6738587 B) (Total open file blocks (not validated): 133)
Minimally replicated blocks: 109063040 (100.00001 %)
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: 3.001944
Corrupt blocks: 0
Missing replicas: 0 (0.0 %)
Number of data-nodes: 103
Number of racks: 1
FSCK ended at Mon Feb 12 10:09:10 CET 2018 in 1608344 milliseconds
So with fsck nothing bad regarding the blocks. How is this check made?
Thx in advance !
Alex
