Zhao Yi Ming created HDFS-14699:
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Summary: Erasure Coding: Can NOT trigger the reconstruction when
have the dup internal blocks and missing one internal block
Key: HDFS-14699
URL: https://issues.apache.org/jira/browse/HDFS-14699
Project: Hadoop HDFS
Issue Type: Bug
Components: ec
Affects Versions: 3.1.1
Reporter: Zhao Yi Ming
We are tried the EC function on 80 node cluster with hadoop 3.1.1, we hit the
same scenario as you said. Could we ask when and which version the fix can be
merged? Thanks! Following are our testing steps, hope it can helpful.(following
DNs have the testing internal blocks)
# we customized a new 10-2-1024k policy and use it on a path, now we have 12
internal block(12 live block)
# decommission one DN, after the decommission complete. now we have 13
internal block(12 live block and 1 decommission block)
# then shutdown one DN which did not have the same block id as 1 decommission
block, now we have 12 internal block(11 live block and 1 decommission block)
# after wait for about 600s (before the heart beat come) commission the
decommissioned DN again, now we have 12 internal block(11 live block and 1
duplicate block)
# Then the EC is not reconstruct the missed block
We think this is a critical issue for using the EC function in a production
env. Could you help? Thanks a lot!
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