PutAzureCosmosDBRecord generates Long running task detected on processor warning and does not update 'In' process rate.

When we generate and insert bulk records into Azure Cosmos DB with PutAzureCosmosDBRecord, we don't see update of the 'In' process rate in the processor and see the warning, while we see the corresponding records in Azure Cosmos DB side.  I captured the screenshot in the below attachment. 

For now, 2 workarounds I found to overcome this issue:

1. Change the consistency property to 'Eventual'. 
2. If you keep consistency as 'Session', add a success relationship/connection to a dummy log processor. 

The related warning in the log file:

2021-06-02 16:41:39,395 WARN [Long Running Task Monitor Thread-1] o.a.n.c.monitor.LongRunningTaskMonitor Long running task detected on processor [id=256082ee-341e-3c42-e379-5c5d365e9e18, name=PutAzureCosmosDBRecord, type=PutAzureCosmosDBRecord]. Task time: 324 seconds. Stack trace:
"Timer-Driven Process Thread-5" Id=74 WAITING on java.util.concurrent.CountDownLatch$Sync@307e6f8b
at java.base@11.0.11/jdk.internal.misc.Unsafe.park(Native Method)
at java.base@11.0.11/java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)
at java.base@11.0.11/java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:885)
at java.base@11.0.11/java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireSharedInterruptibly(AbstractQueuedSynchronizer.java:1039)
at java.base@11.0.11/java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireSharedInterruptibly(AbstractQueuedSynchronizer.java:1345)
at java.base@11.0.11/java.util.concurrent.CountDownLatch.await(CountDownLatch.java:232)
at reactor.core.publisher.BlockingSingleSubscriber.blockingGet(BlockingSingleSubscriber.java:87)
at reactor.core.publisher.Mono.block(Mono.java:1678)
at com.azure.cosmos.CosmosContainer.blockItemResponse(CosmosContainer.java:210)
at com.azure.cosmos.CosmosContainer.createItem(CosmosContainer.java:144)
at org.apache.nifi.processors.azure.cosmos.document.PutAzureCosmosDBRecord.bulkInsert(PutAzureCosmosDBRecord.java:134)
at org.apache.nifi.processors.azure.cosmos.document.PutAzureCosmosDBRecord.onTrigger(PutAzureCosmosDBRecord.java:192)
at app//org.apache.nifi.processor.AbstractProcessor.onTrigger(AbstractProcessor.java:27)
at org.apache.nifi.controller.StandardProcessorNode.onTrigger(StandardProcessorNode.java:1180)
at org.apache.nifi.controller.tasks.ConnectableTask.invoke(ConnectableTask.java:214)
at org.apache.nifi.controller.scheduling.TimerDrivenSchedulingAgent$1.run(TimerDrivenSchedulingAgent.java:103)
at org.apache.nifi.engine.FlowEngine$2.run(FlowEngine.java:110)
at java.base@11.0.11/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
at java.base@11.0.11/java.util.concurrent.FutureTask.runAndReset(FutureTask.java:305)
at java.base@11.0.11/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:305)
at java.base@11.0.11/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base@11.0.11/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base@11.0.11/java.lang.Thread.run(Thread.java:829)
Number of Locked Synchronizers: 1

• java.util.concurrent.ThreadPoolExecutor$Worker@52bef30b