Github user doanduyhai commented on the issue:
https://github.com/apache/zeppelin/pull/1262
@jongyoul The only way to avoid this failure is to block the unit tests
until the embedded Cassandra server is up, which can take time and sometimes
end in a dead-lock situation.
Another solution is to set a timeout for the embedded Cassandra server to
start and skip all the unit tests in case of failure but I'm not fond of
skipping tests because they are here to guarantee no regression
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