[jira] [Created] (AMQ-4721) Update slf4j library to latest version (1.7.5 currently)

["Timothy Bish (JIRA)" <ji...@apache.org>]

Timothy Bish created AMQ-4721:
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             Summary: Update slf4j library to latest version (1.7.5 currently)
                 Key: AMQ-4721
                 URL: https://issues.apache.org/jira/browse/AMQ-4721
             Project: ActiveMQ
          Issue Type: Improvement
          Components: Broker
    Affects Versions: 5.8.0
            Reporter: Timothy Bish
            Priority: Minor
             Fix For: 5.9.0


We are currently on an older release v1.6.6 and should move on to the latest v1.7.5 to pick up performance improvements etc.  

>From the changelog:

"performance improvements: The logger factories in most SLF4J modules namely in jcl-over-slf4j, log4j-over-slf4j, slf4j-jcl, slf4j-jdk14, slf4j-log4j12, and slf4j-simple now use a ConcurrentHashMap instead of a regular HashMap to cache logger instances. This change significantly improves logger retrieval times at the cost of some memory overhead. This improvement was requested in bug #298 by Taras Tielkes who also provided the relevant patch. 

Given the significance of these performance improvements, users are highly encouraged to migrate to SLF4J version 1.7.5 or later. "



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