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From "Keith Turner (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-2608) Create a randomwalk replay meta-node
Date Wed, 23 Apr 2014 16:25:20 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-2608?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13978390#comment-13978390
] 

Keith Turner commented on ACCUMULO-2608:
----------------------------------------

As I have watched random walk graphs grow over time I have realized two things.  First, increasing
the graphs size may increase the possible number of bugs that can be found.  Second, this
may come at the cost of taking longer to find any particular bug.

I suspect for many bugs that random walk finds there is a cyclic sub-graph that will reproduce
a particular bug much more quickly.  However its probably not feasible to automatically find
this subgraph.   If this sub-graph could be found through automated trial and error, it would
make it easier for the developer to reproduce the bug.

> Create a randomwalk replay meta-node
> ------------------------------------
>
>                 Key: ACCUMULO-2608
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-2608
>             Project: Accumulo
>          Issue Type: New Feature
>          Components: test
>            Reporter: Mike Drob
>            Assignee: Bill Havanki
>             Fix For: 1.4.6, 1.5.2, 1.6.1, 1.7.0
>
>
> It would be useful to have the ability to replay randomwalk sequences.
> If a randomwalk fails, it is often difficult to reproduce due to the random nature of
things. If current test runs were modified to output a specially crafted module representing
their sequence, then future runs could accept it as the module to run and improve reproduction
capabilities.



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