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From "Eric Newton (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-3696) too many trace spans consume memory
Date Thu, 26 Mar 2015 02:50:52 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-3696?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14381260#comment-14381260
] 

Eric Newton commented on ACCUMULO-3696:
---------------------------------------

The first item is a bug in the accumulo tracing code found by [~billie.rinaldi] and others.
It was a (dumb) optimization I put in to ignore spans that were shorter than a millisecond.
 Unfortunately, that leads to broken traces.  I probably should have put it into a separate
commit.  My bad.

I will add a log message about dropping traces, but I'm going to bound it by time, to avoid
spamming the logs.

Thanks for the review.


> too many trace spans consume memory
> -----------------------------------
>
>                 Key: ACCUMULO-3696
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-3696
>             Project: Accumulo
>          Issue Type: Bug
>          Components: tserver
>            Reporter: Eric Newton
>            Assignee: Eric Newton
>            Priority: Minor
>          Time Spent: 0.5h
>  Remaining Estimate: 0h
>
> Some users have experienced as many as 100K spans stored in memory, and suspect that
it has caused OOM errors.



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