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https://issues.apache.org/jira/browse/OPENJPA-2845?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17250977#comment-17250977
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Romain Manni-Bucau commented on OPENJPA-2845:
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Without a reproducer it will be hard or even almost impossible but some caching
- either actual cache or reuse of some JPA component instances - can make the
resultset partially bypassed in some particular configurations. Without more
information it is the main cause I can think about.
> JPA intermittently giving null resultset even DB has value
> ----------------------------------------------------------
>
> Key: OPENJPA-2845
> URL: https://issues.apache.org/jira/browse/OPENJPA-2845
> Project: OpenJPA
> Issue Type: Bug
> Reporter: Deepesh
> Priority: Critical
>
> Data is getting fetched from Oracle DB but while mapping it back to JPA
> object, it gets null. This can be seen through Dynatrace that SQL returns row
> result but JPA resultset is getting null.
> Query is quite simple and just fetching the record based on primary key.
> Although another field is being passed in where clause with primary key but
> it returns single row.
> Also, same jpa query provides results (same input) several times before.
> We enabled jpa logs and see query runs fine on DB.
> Is there any thresold due to which JPA not working as expected? Any
> suggestions to handle this ?
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