Using DJL.AI For Deep Learning BERT Q&A in NiFi DataFlows
Introduction:
I will be talking about this processor at Apache Con @ Home 2020 in my "Apache Deep Learning 301" talk with Dr. Ian Brooks.
Sometimes you want your Deep Learning Easy and in Java, so let's do that with DJL in a custom Apache NiFi processor running in CDP Data Hubs. This one does BERT QA.
To use the processor feed in a paragraph to analyze via the paragraph parameter in the NiFi processor. Also feed in a question, like Why? or something very specific like asking the date or an event.
The pretrained model is BERT QA model using PyTorch. the NiFi Processor Source:
Make sure you have 1-2 GB of RAM extra for your NiFi instance for running each DJL processor. If you have a lot of text, run more nodes and/or RAM. Make sure you have at least 8 cores per Deep Learning process. I prefer JDK 11 for this.
The pretrained model is DistilBERT model trained by HuggingFace using PyTorch.
Tip
Make sure you have 1-2 GB of RAM extra for your NiFi instance for running each DJL processor. If you have a lot of text, run more nodes and/or RAM. Make sure you have at least 8 cores per Deep Learning process. I prefer JDK 11 for this.
After seeing Caito Scherr's amazing talk, I want to build up some useful dashboards. My first step is exploring all the available APIs in my CSA/Flink environment. The easiest way to discover them was I turned on Developer Console in Chrome while using the Flink Dashboard which is a great dashboard in it's own right. But it is not focused on some key metrics that some customers are asking about in a very easy to read format for end-users.
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2020-09-11 13:37:42,586 INFO org.apache.flink.yarn.YarnResourceManager - Disconnect job manager 9c2e3f25dae1d548dc730941d6484cbb@akka.tcp://flink@ec2-3-86-165-80.compute-1.amazonaws.com:33566/user/jobmanager_7 for job 67a2de8fb291333bbd90b334f8f83def from the resource manager.
2020-09-11 13:37:42,586 INFO org.apache.flink.runtime.leaderelection.ZooKeeperLeaderElectionService - Stopping ZooKeeperLeaderElectionService ZooKeeperLeaderElectionService{leaderPath='/leader/67a2de8fb291333bbd90b334f8f83def/job_manager_lock'}.
2020-09-11 13:37:42,591 INFO org.apache.flink.runtime.jobmanager.ZooKeeperJobGraphStore - Removed job graph 67a2de8fb291333bbd90b334f8f83def from ZooKeeper.
2020-09-09 17:58:17,456 INFO org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducer - Starting FlinkKafkaInternalProducer (1/1) to produce into default topic krogerprices
2020-09-09 17:58:17,465 INFO org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumerBase - Consumer subtask 0 has no restore state.
2020-09-09 17:58:17,475 INFO org.apache.flink.kafka.shaded.org.apache.kafka.clients.consumer.ConsumerConfig - ConsumerConfig values:
It is very tricky and can cause performance degradation, if your user could just use at least once, then always go with that. Having data sinks like Kudu where you can do an upsert makes exactly once less needed.
With the promotion of Cloud Runtime 7.2.1 to Public Cloud, the CDF team is pleased to announce three key and very important updates that were also promoted to production today and available to customers. These are:
