Best Practices from Oracle Development's A‑Team

Introducing ThreadLogic


Eric Gross and Sabha Parameswaran, from Oracle FMW Architects Team (The A-team) are happy to introduce ThreadLogic, an open source Thread Dump Analyzer tool, to the Middleware community.

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The current set of TDA tools (Samurai/TDA) don't mine the thread dumps or provide a more detailed view of what each thread is doing while just limiting themselves to reporting the state (locked/waiting/running) or the lock information.  They don't mention the type of activity within a thread, should it be treated as normal or deserving a closer look? Can a pattern or anti-pattern be applied against them? Any possible optimizations? Are there any hot spots? Any classification of threads based on their execution cycles?

We decided to create ThreadLogic to address these deficiencies. It is based on a fork of the TDA open source tool with new capabilities to analyze and provide advice based on a set of extensible advisories and thread grouping while supporting all JVM thread dumps. Also, a thorough and in-depth analysis of WebLogic Server thread dumps is provided. Both the thread grouping and advisories are extensible allowing the user to add new patterns to match and tag or group threads. Please check the document in the ThreadLogic projects web site for more details of the tool.

The latest stable bits (version 0.9) can be downloaded from here .

Feedback welcome.

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