20 append: Blocks recovered on startup should be treated with lower priority
during block synchronization
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Key: HDFS-1218
URL: https://issues.apache.org/jira/browse/HDFS-1218
Project: Hadoop HDFS
Issue Type: Bug
Components: data-node
Affects Versions: 0.20-append
Reporter: Todd Lipcon
Assignee: Todd Lipcon
Priority: Critical
Fix For: 0.20-append
When a datanode experiences power loss, it can come back up with truncated
replicas (due to local FS journal replay). Those replicas should not be allowed
to truncate the block during block synchronization if there are other replicas
from DNs that have _not_ restarted.
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