It looks like from - https://issues.apache.org/jira/browse/MAPREDUCE-5649, that this BUG is fixed in Hadoop2.6.1 but HDP2.2.6 has Hadoop2.6.0. So need confirmation before I respond to the customer.
In 2.6.0 - NO
Fixed version...It's in the link that you posted. My cluster has not reported the issue. HDP 2.3.2
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This bug is fixed in all HDP releases after (but not including) HDP 2.2.8. It is fixed in 2.3.0+