Yiqun Lin created HDFS-11178:
--------------------------------

             Summary: TestAddStripedBlockInFBR#testAddBlockInFullBlockReport 
fails frequently in trunk
                 Key: HDFS-11178
                 URL: https://issues.apache.org/jira/browse/HDFS-11178
             Project: Hadoop HDFS
          Issue Type: Sub-task
          Components: test
            Reporter: Yiqun Lin
            Assignee: Yiqun Lin


The test {{TestAddStripedBlockInFBR#testAddBlockInFullBlockReport}} fails 
easily in trunk. It's easy to reproduce the failure, it fails 2~3 times when I 
run the test 4~-5 times in my local. Also it fails in the recent Jenkins, The 
stack infos:
{code}
java.lang.AssertionError: expected:<9> but was:<7>
        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.namenode.TestAddStripedBlockInFBR.testAddBlockInFullBlockReport(TestAddStripedBlockInFBR.java:108)
{code}
It's easy to have a fix: Use {{GenericTestUtils.waitFor}} to wait the full 
blocks being reported. 



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