Thread limit health check fails when configured as documented to 4096 threads

Summary

The thread limit health check fails when the thread limit is configured to 4096 as documented in KB article:

• Health Check: Thread Limit

Environment

• CentOS 7
• JIRA 7.3.0
• nproc soft limit set to
  • 4096 (default)
  • 4096 via /etc/security/limits.conf configured to:

    jira             soft    nofile          4096
    jira             hard    nofile          8192
    jira             soft    nproc           4096
    jira             hard    nproc           8192
    

Steps to Reproduce

1. Configure limits as described in the KB article
2. Restart JIRA

Expected Results

Health check passes without issue.

Actual Results

Thread limit health check fails with warning:

The maximum number of processes for the user account running JIRA is currently 4096, which can cause performance issues. We recommend increasing this to at least 4,096.

Workaround

Setting the soft limit to a value greater than 4096 (i.e. 4097) will cause the check to pass.