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From Paresh Shah <>
Subject Occasional freezing of the processor
Date Fri, 14 Sep 2018 17:38:04 GMT
Nifi Version: 1.3
#nodes: 4
Using embedded zookeeper.

I have a custom processor which underneath runs a Jetty Server and is used for receiving external
push notifications. The processor is scheduled to run every 1 sec and will pull the data from
the queue where the Jetty layer queues it.

We are seeing that occasionally the processor appears to be not running i.e not processing
any data, though there is data to be processed. The processor is in the running state. The
Jetty server internally is still receiving new requests and queuing them. There are no OutOfMemory
errors or Exceptions. The processor just freezes.

The Processor’s in the rest of the pipeline continue to run. Also the CPU utilization is
only 5-10%.

Temporary Workaround:
We have had to stop and start this processor to have the processor start processing again.

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