Jing Zhao created HDFS-5781:
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Summary: Use a map to record the mapping between FSEditLogOpCode
and the corresponding byte value
Key: HDFS-5781
URL: https://issues.apache.org/jira/browse/HDFS-5781
Project: Hadoop HDFS
Issue Type: Improvement
Components: namenode
Affects Versions: 2.4.0
Reporter: Jing Zhao
Assignee: Jing Zhao
HDFS-5674 uses Enum.values and enum.ordinal to identify an editlog op for a
given byte value. While improving the efficiency, it may cause issue. E.g.,
when several new editlog ops are added to trunk around the same time (for
several different new features), it is hard to backport the editlog ops with
larger byte values to branch-2 before those with smaller values, since there
will be gaps in the byte values of the enum.
This jira plans to still use a map to record the mapping between editlog ops
and their byte values.
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