[jira] [Created] (SLING-11149) Expose information about cleaned up leftover ThreadLocal values

["Robert Munteanu (Jira)" <ji...@apache.org>]

Robert Munteanu created SLING-11149:
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             Summary: Expose information about cleaned up leftover ThreadLocal values 
                 Key: SLING-11149
                 URL: https://issues.apache.org/jira/browse/SLING-11149
             Project: Sling
          Issue Type: New Feature
          Components: Commons
            Reporter: Robert Munteanu
             Fix For: Commons Threads 3.3.0


As discussed in SLING-10831, the ThreadLocal cleanup feature is valuable as a safeguard for code that might lead to hard-to-diagnose memory leaks.

At the same time, it does not let developers know when a leak has been prevented. We should improve this. The following improvements can be made:

# log with a {{WARN}} level any cleanup operation. Care must be taken to not overflow the logs, so maybe a way of only reporting a cleanup for a certain key once can be used (memory-bound)
# expose a counter that reports how many cleanup operations have been performed by a given thread pool



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