Jing Zhao created HDFS-9754:
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Summary: Avoid unnecessary getBlockCollection calls in BlockManager
Key: HDFS-9754
URL: https://issues.apache.org/jira/browse/HDFS-9754
Project: Hadoop HDFS
Issue Type: Sub-task
Components: namenode
Reporter: Jing Zhao
Assignee: Jing Zhao
Currently BlockManager calls {{Namesystem#getBlockCollection}} in order to:
1. check if the block has already been abandoned
2. identify the storage policy of the block
3. meta save
For #1 we can use BlockInfo's internal state instead of checking if the
corresponding file still exists.
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