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SNOW-1335472: Use ReentrantLock instead of synchronized for SFSession#open #1795

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@jtb93 jtb93 commented Jun 19, 2024

Overview

SNOW-1335472

Pre-review self checklist

  • PR branch is updated with all the changes from master branch
  • The code is correctly formatted (run mvn -P check-style validate)
  • New public API is not unnecessary exposed (run mvn verify and inspect target/japicmp/japicmp.html)
  • The pull request name is prefixed with SNOW-XXXX:
  • Code is in compliance with internal logging requirements

External contributors - please answer these questions before submitting a pull request. Thanks!

  1. What GitHub issue is this PR addressing? Make sure that there is an accompanying issue to your PR.

#1729

  1. Fill out the following pre-review checklist:

    • I am adding a new automated test(s) to verify correctness of my new code
    • I am adding new logging messages
    • I am modifying authorization mechanisms
    • I am adding new credentials
    • I am modifying OCSP code
    • I am adding a new dependency or upgrading an existing one
    • I am adding new public/protected component not marked with @SnowflakeJdbcInternalApi (note that public/protected methods/fields in classes marked with this annotation are already internal)
  2. Please describe how your code solves the related issue.

Virtual thread pinning occurs when I/O is performed within a synchronized method or block. Pinning can significantly hamper performance. See MariaDB (updated to avoid pinning) vs. MySQL (not updated to avoid pinning) JDBC driver performance comparison.

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@jtb93 jtb93 changed the title Use ReentrantLock instead of synchronized for SFSession#open SNOW-1335472: Use ReentrantLock instead of synchronized for SFSession#open Jun 19, 2024
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