closing buffers used in flight producer (apache arrow flight - Java)

[a h]

I have gone over multiple Java examples for apache arrow flight. In all the flight producers that I have checked (for instance, https://arrow.apache.org/cookbook/java/flight.html), I cannot seem to see any example (perhaps due to reading/testing incorrectly) where inside an 'acceptPut' method, the root or child allocator is being closed upon (I could not locate a try with resources block).  I realize a try with resources is being used when the root allocator and cookbook producer is being created.  However, for a long running service, is that the desired setup or should one use a try with resources within the acceptPut and similar methods to close the child allocator (not the root one).  I believe creating child allocators on the fly might not be as fast but one could try to optimize that.  I asked because whenever I use the getHeadroom on the allocator after each acceptPut, I can see that the headroom decreases without being reclaimed & the close method for the auto closeable does not seem to be called.  Quite happy to be shown what I am doing wrong as my intent is only to improve the implementation I am working on.  Thank you.