Github user jiny2 commented on the issue:
https://github.com/apache/incubator-hawq/pull/1029
@zhangh43 YARN mode, 2 segments, each segment has 75gb mem, 15core
resource, and the default queue has 25% capacity, 80% maximum capacity. Then
allocated and return 12 x 256mb vsegs, then wait more than 5 min. RM will try
to return yarn containers but due to precision problem, there are always some
yarn containers cannot be returned. because 0.9999999999... is less than 1. As
to EPSILON, I adopted previous definition introduce by Wen. I think it should
work appropriately.
(gdb) p *containerset
$6 = {Allocated = {MemoryMB = 5120, Core = 1, Ratio = 0}, Available =
{MemoryMB = 5120,
Core = 0.99999999999999956, Ratio = 0}, Containers = 0x7ff07a93c870}
(gdb) quit
A debugging session is active.
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