[COMMITTERS] pgsql: Fix RecursiveCopy.pm to cope with disappearing files.

Fix RecursiveCopy.pm to cope with disappearing files.

When copying from an active database tree, it's possible for files to be
deleted after we see them in a readdir() scan but before we can open them.
(Once we've got a file open, we don't expect any further errors from it
getting unlinked, though.)  Tweak RecursiveCopy so it can cope with this
case, so as to avoid irreproducible test failures.

Back-patch to 9.6 where this code was added.  In v10 and HEAD, also
remove unused "use RecursiveCopy" in one recovery test script.

Michael Paquier and Tom Lane

Discussion: https://postgr.es/m/24621.1504924323@sss.pgh.pa.us

Branch
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REL9_6_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/64e2b29bdea0861d6b7509653a676ccc9261bfbb

Modified Files
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src/test/perl/RecursiveCopy.pm | 64 +++++++++++++++++++++++++++++-------------
1 file changed, 45 insertions(+), 19 deletions(-)


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