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https://issues.apache.org/jira/browse/NIFI-5244?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16493364#comment-16493364
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ASF GitHub Bot commented on NIFI-5244:
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Github user MikeThomsen commented on the issue:
https://github.com/apache/nifi/pull/2742
Yep. At first I thought it was something clever, so I tried it out w/ a
simple Java class and `ConcurrentHashMap` doesn't handle optionals.
> MockSchemaRegistry retrieveSchemaByName is broken
> -------------------------------------------------
>
> Key: NIFI-5244
> URL: https://issues.apache.org/jira/browse/NIFI-5244
> Project: Apache NiFi
> Issue Type: Bug
> Reporter: Mike Thomsen
> Assignee: Mike Thomsen
> Priority: Major
>
> retrieveSchemaByName uses an optional, but never calls get() on the optional
> so the hashmap always returns null.
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