xuzq created HDFS-14208:
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Summary: A large number missingblocks happend after failover to
active.
Key: HDFS-14208
URL: https://issues.apache.org/jira/browse/HDFS-14208
Project: Hadoop HDFS
Issue Type: Improvement
Components: hdfs
Affects Versions: 3.0.3, 3.1.1, 3.0.2
Reporter: xuzq
When cluster is very large, Standby startup takes about 1 hours. After Standby
starts and exits SafeMode, a large number of missingblocks often appeared after
failover from standby to active. And the missingblocks will gradually
disappear after 6 hours(block report interval).
According the log and find only half the blocks of one DataNode be processed in
SaftMode.
Because the lease expired after processed some blocks of one DataNode.
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