[jira] [Created] (NIFI-8765) WAIT processor uses > 100 % CPU when files are on queue

["Jul Tomten (Jira)" <ji...@apache.org>]

Jul Tomten created NIFI-8765:
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             Summary: WAIT processor uses > 100 % CPU when files are on queue
                 Key: NIFI-8765
                 URL: https://issues.apache.org/jira/browse/NIFI-8765
             Project: Apache NiFi
          Issue Type: Bug
          Components: Extensions
    Affects Versions: 1.13.2
         Environment: ubuntu 2004 lts
sap machine java 1.11
            Reporter: Jul Tomten


I'm on NiFi 1.13.2

I have a WAIT processor and 2000 files queud up in the upstream connection

The problem is that the WAIT processor uses more than 100% CPU all the time as long as the messages are on queue.
Any idea about the problem?

 

Release Signal Identifier = ${uuid}

Target Signal Count = 1

Signal Counter Name = No value set

Wait Buffer Count = 1500

Releasable FlowFile Count = 1

Expiration Duration = 10 min

Attribute Copy Mode = Keep original

Wait Mode = Keep in the upstream connection

Wait Penalty Duration = 5 min

 

Number of Threads 10 

 

 

I'd planned to have more than 10 000 000 messages on queue and then let them expire after 4 days. Some or all messages may be notified to proceed. Is the WAIT intended to handel such a scenario? More extensive documentation would be good.

 Are you supposed to have multiple threads on the WAIT/NOTIFY processors? Seems like the MapCache hits problems ConcurrentModificationException. More extensive documentation would be good.



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