Sravya Tirukkovalur commented on SENTRY-1486:

Seems like Oracle does not support repeatable-read.

Caused by: javax.jdo.JDODataStoreException: READ_COMMITTED and SERIALIZABLE are 
the only valid transaction levels

> Sentry should use repeatable-read consistency level
> ---------------------------------------------------
>                 Key: SENTRY-1486
>                 URL: https://issues.apache.org/jira/browse/SENTRY-1486
>             Project: Sentry
>          Issue Type: Bug
>          Components: Sentry
>    Affects Versions: 1.7.0, sentry-ha-redesign
>            Reporter: Alexander Kolbasov
>            Assignee: Alexander Kolbasov
>             Fix For: 1.8.0
>         Attachments: SENTRY-1486.001.patch, SENTRY-1486.002.patch
> Currently Sentry uses the "read-committed" consistency level which is the 
> default for the Datanucleus JDO library. This causes potential problems since 
> the state visible to each transaction can actually see updates from another 
> transactions, so it is very difficult to reason about any code that reads 
> multiple pieces of data.
> Instead it should use repeatable read" consistency which guarantees that any 
> transaction only sees the state at the beginning of a transaction plus any 
> updates done within a transaction.

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