java.lang.AssertionError: expected:<0> but was:<1>

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expected:<0> but was:<1>
java.lang.AssertionError: expected:<0> but was:<1>	at org.junit.Assert.fail(Assert.java:88)	at org.junit.Assert.failNotEquals(Assert.java:743)	at org.junit.Assert.assertEquals(Assert.java:118)	at org.junit.Assert.assertEquals(Assert.java:555)	at org.junit.Assert.assertEquals(Assert.java:542)	at org.apache.hadoop.hdfs.server.blockmanagement.TestPendingReplication.testPendingAndInvalidate(TestPendingReplication.java:293)