akalash commented on PR #19702:
URL: https://github.com/apache/flink/pull/19702#issuecomment-1137472221

   It is not really that way. jobManagerTaskRestore -> 
InflightDataRescalingDescriptor -> Virtual Channel is the current logic that 
says that we need Virtual Channel only if we need rescaling(which is true).  I 
actually haven't changed anything there.  And if something changes that the 
rescaling feature will be entirely broken. But the condition `we need 
rescaling` is incorrect right now and it is exactly what I have fixed.
   So I tried to say that the current problem is not about missing Virtual 
Channel the current problem is that we determine rescaling incorrectly(we think 
that we don't want to rescale but in reality we want).


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