farmmamba created HDFS-17002:
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Summary: [EC]:Generate parity blocks in time to prevent file
corruption
Key: HDFS-17002
URL: https://issues.apache.org/jira/browse/HDFS-17002
Project: Hadoop HDFS
Issue Type: Improvement
Components: erasure-coding
Affects Versions: 3.4.0
Reporter: farmmamba
In current EC implementation, the corrupted parity block will not be
regenerated in time.
Think about below scene when using RS-6-3-1024k EC policy:
If three parity blocks p1, p2, p3 are all corrupted or deleted, we are not
aware of it.
Unfortunately, a data block is also corrupted in this time period, then this
file will be corrupted and can not be read by decoding.
So, here we should always re-generate parity block in time when it is unhealthy.
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