junit.framework.AssertionFailedError: Leader failed to transition to LOOKING or FOLLOWING state

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junit.framework.AssertionFailedError: Leader failed to transition to LOOKING or FOLLOWING state
at org.apache.zookeeper.server.quorum.RaceConditionTest.testRaceConditionBetweenLeaderAndAckRequestProcessor(RaceConditionTest.java:74)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.lang.Thread.run(Thread.java:745)

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