[jira] [Assigned] (MESOS-3449) Expand the range of integer precision in json <-> protobuf conversions to include unsigned integers

["Adam B (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/MESOS-3449?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Adam B reassigned MESOS-3449:
-----------------------------

    Assignee:     (was: Joseph Wu)

> Expand the range of integer precision in json <-> protobuf conversions to include unsigned integers
> ---------------------------------------------------------------------------------------------------
>
>                 Key: MESOS-3449
>                 URL: https://issues.apache.org/jira/browse/MESOS-3449
>             Project: Mesos
>          Issue Type: Bug
>          Components: stout
>    Affects Versions: 0.25.0
>            Reporter: Joseph Wu
>            Priority: Minor
>              Labels: json, mesosphere, protobuf
>
> The previous changes (MESOS-3345) to support integer precision when converting JSON <-> Protobuf did not support precision for unsigned integers between {{INT64_MAX}} and {{UINT64_MAX}}.  (There's some loss, but the conversion is still as good/bad as it was with doubles.)
> This problem is due to a limitation in the JSON parsing library we use (PicoJSON), which parses integers as {{int64_t}}.
> Some possible solutions or things to investigate:
> * We can patch PicoJSON to parse some large values as {{uint64_t}}.
> * We can investigate using another parsing library.
> * If we want extra precision beyond 64 or 80 bits per double, one possibility is the [GMP library|https://gmplib.org/].  We'd still need to change the parsing library though.



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