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https://issues.apache.org/jira/browse/NIFI-4043?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16043827#comment-16043827
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ASF GitHub Bot commented on NIFI-4043:
--------------------------------------

Github user bbende commented on a diff in the pull request:

    https://github.com/apache/nifi/pull/1901#discussion_r121037053
  
    --- Diff: 
nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/WaitNotifyProtocol.java
 ---
    @@ -144,6 +150,28 @@ public void setReleasableCount(int releasableCount) {
     
         }
     
    +    /**
    +     * Class to pass around the signal with the JSON that was deserialized 
to create it.
    +     */
    +    public static class SignalHolder {
    --- End diff --
    
    Agreed, we can definitely get right of the SignalHolder if you use the 
approach above.


> Implement a DistributedMapCacheClient backed by Redis
> -----------------------------------------------------
>
>                 Key: NIFI-4043
>                 URL: https://issues.apache.org/jira/browse/NIFI-4043
>             Project: Apache NiFi
>          Issue Type: Improvement
>            Reporter: Bryan Bende
>            Assignee: Bryan Bende
>            Priority: Minor
>
> We should provide other caching options besides the 
> DistributedMapCacheClient/DistributedMapCacheServer. 
> Redis is a popular caching solution and we could implement a 
> RedisDistributedMapCacheClient that would let us use all the existing 
> processors against Redis.



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