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From michaelandrepearce <...@git.apache.org>
Subject [GitHub] activemq-artemis pull request #1443: ARTEMIS-1324 Deadlock detection and hea...
Date Sun, 06 Aug 2017 04:45:33 GMT
Github user michaelandrepearce commented on a diff in the pull request:

    https://github.com/apache/activemq-artemis/pull/1443#discussion_r131534303
  
    --- Diff: docs/user-manual/en/critical-analysis.md ---
    @@ -0,0 +1,32 @@
    +# Critical Analysis of the broker
    +
    +There are a few things that can go wrong on a production environment:
    +
    +- Bugs, for more than we try they still happen! We always try to correct them, but that's
the only constant in software development.
    +- IO Errors, disks and hardware can go bad
    +- Memory issues, the CPU can go crazy by another process
    +
    +For cases like this, we added a protection to the broker to shut itself down when bad
things happen.
    +
    +We measure time response in places like:
    +
    +- Queue delivery (add to the queue)
    +- Journal storage
    +- Paging operations
    +
    +If the response time goes beyond a configured timeout, the broker is considered unstable
and an action will be taken to either shutdown the broker or halt the VM.
    +
    +You can use these following configuration options on broker.xml to configure how the
critical analysis is performed.
    +
    +
    +Name | Description
    +:--- | :---
    +analyze-critical | Enable or disable the critical analysis (default true)
    +analyze-critical-timeout | Timeout used to do the critical analysis (default 120000 milliseconds)
    +analyze-critical-check-period | Time used to check the response times (default half of
analyze-critical-timeout)
    +analyze-critical-halt | Should the VM be halted upon failures (default false)
    --- End diff --
    
    I was more saying:
    
    how does an outside observer view the state. Eg many people rely on logs or JMX 


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