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https://issues.apache.org/jira/browse/NIFI-7279?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17066855#comment-17066855
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Scott Giles commented on NIFI-7279:
-----------------------------------
I don't have access to a development computer right now. I'm basically stuck
with a tablet.
> Redis Detect Duplicate Issue
> ----------------------------
>
> Key: NIFI-7279
> URL: https://issues.apache.org/jira/browse/NIFI-7279
> Project: Apache NiFi
> Issue Type: Bug
> Affects Versions: 1.11.4
> Reporter: Scott Giles
> Priority: Major
>
> When using a DetectDuplicate processor with a
> RedisDistributedMapCacheClientService cache service, if the Cache Entry
> Identifier is not in the cache and Cache The Entry Identifier is set to
> "false", a NullPointerException is thrown rather than the expected
> non-duplicate relationship.
>
> A possible fix would be to change line 202 of
> java/org/apache/nifi/redis/service/RedisDistributedMapCacheClientService.java
> to
> return (v !=null ? valueDeserializer.deserialize(v) : null);
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