Tsz Wo Nicholas Sze created HDFS-9205:
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Summary: Do not sehedule corrupted blocks for replication
Key: HDFS-9205
URL: https://issues.apache.org/jira/browse/HDFS-9205
Project: Hadoop HDFS
Issue Type: Improvement
Components: namenode
Reporter: Tsz Wo Nicholas Sze
Assignee: Tsz Wo Nicholas Sze
Priority: Minor
Corrupted blocks by definition are blocks cannot be read. As a consequence,
they cannot be replicated. In UnderReplicatedBlocks, there is a queue for
QUEUE_WITH_CORRUPT_BLOCKS and chooseUnderReplicatedBlocks may choose blocks
from it. It seems that scheduling corrupted block for replication is wasting
resource and potentially slow down replication for the higher priority blocks.
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