Jeetendra G Vasisht created NIFI-12409:
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Summary: ListSFTP processor increases thread count when it is
stopped
Key: NIFI-12409
URL: https://issues.apache.org/jira/browse/NIFI-12409
Project: Apache NiFi
Issue Type: Bug
Components: Extensions
Affects Versions: 1.23.2
Reporter: Jeetendra G Vasisht
Attachments: image-2023-11-24-11-23-52-497.png,
image-2023-11-24-11-24-23-019.png
We are using ListSFTP processor that is configured with "Concurrent tasks = 1".
If it is stopped on the nifi UI while it is processing (showing 1 thread
running), automatically after the stop, it shows 2 threads:
!image-2023-11-24-11-23-52-497.png|width=368,height=167!
After this, when we start this processor it will always run with 2 threads:
!image-2023-11-24-11-24-23-019.png|width=375,height=172!
and that affects the functionality of the processor. Many times, when it runs,
it will list more files than expected.
If the processor is later stopped while having 2 threads running, it will also
add an additional thread to the existing ones. Each time this stop and start
happens as described one by one additional threads are added to the Processor.
This is fixed only by stopping the processor when it's not running (I.e. no
threads are running). After stopping in this condition, when it is started it
will run again with only one thread.
Same issue occurs with ListFTP processor.
Note: We are running in a non cluster mode (having just one replica).
Because this was found in two default NiFi processors, We are raising this
ticket to NiFi
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