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https://issues.apache.org/jira/browse/BEAM-10402?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17175900#comment-17175900
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Brian Hulette commented on BEAM-10402:
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[~kenn] should we be adding a `@DefaultQualifier(NonNull.class)` in every
package-info.java now? https://checkerframework.org/manual/#null-defaults
I tried adding this in zetasketch as a test and it turned up a few more errors
> [Umbrella] Eliminate nullability errors from Beam Java
> ------------------------------------------------------
>
> Key: BEAM-10402
> URL: https://issues.apache.org/jira/browse/BEAM-10402
> Project: Beam
> Issue Type: Improvement
> Components: sdk-java-core
> Reporter: Kenneth Knowles
> Priority: P1
> Labels: starter
> Time Spent: 3h
> Remaining Estimate: 0h
>
> I enabled the checker framework and the core SDK exceeds 100 nullability
> errors immediately. We should make this number zero, since nullability errors
> are solved problem in computer science and they do periodically impact Beam.
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