Improve performance of stringification in addStoredBlock
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Key: HDFS-3024
URL: https://issues.apache.org/jira/browse/HDFS-3024
Project: Hadoop HDFS
Issue Type: Improvement
Components: name-node
Affects Versions: 0.23.0
Reporter: Todd Lipcon
Assignee: Todd Lipcon
Priority: Minor
In looking at stack traces of a NN under a heavy block allocation load (around
a thousand per second) I see that a lot of time is being taken up in
stringification of log messages for addStoredBlock. This code can be optimized
to use a single StringBuilder instead of a lot of nested toString() calls.
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