Mikhail Mazursky created CASSANDRA-5625:
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Summary: Cleanup Tracing class
Key: CASSANDRA-5625
URL: https://issues.apache.org/jira/browse/CASSANDRA-5625
Project: Cassandra
Issue Type: Improvement
Reporter: Mikhail Mazursky
Priority: Trivial
1. Tracing instance cannot be null because it's initialized at classloading
time and never changes. Made it final to prove that. Removed all redundant null
checks.
2. StorageService has a Tracing.instance() call - it should trace something or
can be removed?
3. Made sessions a ConcurrentMap to stress that it should be thread-safe.
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