Github user arina-ielchiieva commented on a diff in the pull request:
https://github.com/apache/drill/pull/669#discussion_r89994657
--- Diff:
exec/java-exec/src/test/java/org/apache/drill/TestDynamicUDFSupport.java ---
@@ -271,6 +271,75 @@ public void testDuplicatedFunctionsInLocalRegistry()
throws Exception {
}
@Test
+ public void testSuccessfulRegistrationAfterSeveralRetryAttempts() throws
Exception {
--- End diff --
Actually test `testSuccessfulRegistrationAfterSeveralRetryAttempts()`
covers this case. To produce this issue we don't need several drillbits, it's
just enough to issue several concurrent create function commands. As for this
test case, I just mock method that updates remote function registry to throw
VersionMismatchException two times and then call this method for real.
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