https://issues.apache.org/jira/browse/YARN-4526 removed the public constructor on SystemClock - making it an incompatible change.
cc Karthik Kambatla
Trivial patch. Re-introduces the public constructor and marks it as deprecated.
Karthik Kambatla - please review.
My bad. Thanks for catching and fixing this, Sid.
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Thanks for the review Karthik Kambatla - committing to master and branch-2.
FAILURE: Integrated in Hadoop-trunk-Commit #9462 (See https://builds.apache.org/job/Hadoop-trunk-Commit/9462/)
YARN-4816. Fix incompatible change in SystemClock. (sseth: rev eba66a64d28b50a660d6f537c767677f5fa0f7ea)