pipelinedResponses should be clear

[stillerrr]

pipelinedResponses should be clear in MultiNodePipelineBase.java and avoid this pipeline object reporting ENP when executing close() and reuse like #3697

MultiNodePipelineBase can be reused when calling close(), there is no switch to avoid this way to use MultiNodePipelineBase

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (64b5aac) 75.64% compared to head (09a1865) 75.65%.

❗ Current head 09a1865 differs from pull request most recent head 4404bbd. Consider uploading reports for the commit 4404bbd to get more accurate results

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Additional details and impacted files

@@            Coverage Diff            @@
##             master    #3699   +/-   ##
=========================================
  Coverage     75.64%   75.65%           
- Complexity     4914     4915    +1     
=========================================
  Files           297      297           
  Lines         14956    14957    +1     
  Branches       1124     1124           
=========================================
+ Hits          11314    11316    +2     
  Misses         3149     3149           
+ Partials        493      492    -1     

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[sazzad16]

@stillerrr What about inner Queues in pipelinedResponses?

[stillerrr]

@stillerrr What about inner Queues in pipelinedResponses?

I think it would be okay, the queue would be empty after executing sync(), but pipelinedResponses also has the empty queue

once the pipeline object is reused, there is no connection in connnections map, but has queue in pipelinedResponses map