Will Berkeley created KUDU-2631:
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Summary: DeleteTableITest.TestNoDeleteTombstonedTablets is a
little flaky
Key: KUDU-2631
URL: https://issues.apache.org/jira/browse/KUDU-2631
Project: Kudu
Issue Type: Bug
Affects Versions: 1.8.0
Reporter: Will Berkeley
Assignee: Will Berkeley
delete_table-itest's TestNoDeleteTombstonedTablets test case is a little flaky
since 87dcaf34d3. which implemented removal of excess replicas in the master.
The test does the following:
{noformat}
A. Find the leader L of tablet T
B. Find a server X that's not the leader L but has a replica of T.
C. Find a server Y that has no replica of T.
D. Add a replica of T to Y (as a VOTER).
E. Remove the replica of T from X.
F. Wait and check that the master doesn't delete the tombstoned replica of T on
Y, even after restart.
{format}
The problem is that step D makes T over-replicated, so E is racing with the
master removing Y. Rarely, the master wins the race and its config change is
pending when step E occurs, which causes E to fail because a tablet will only
accept one config change at a time.
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