[jira] [Created] (HDFS-12095) Block Storage: Fix cblock unit test failures in TestLocalBlockCache, TestCBlockReadWrite and TestBufferManager

["Mukul Kumar Singh (JIRA)" <ji...@apache.org>]

Mukul Kumar Singh created HDFS-12095:
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             Summary: Block Storage: Fix cblock unit test failures in TestLocalBlockCache, TestCBlockReadWrite and TestBufferManager
                 Key: HDFS-12095
                 URL: https://issues.apache.org/jira/browse/HDFS-12095
             Project: Hadoop HDFS
          Issue Type: Sub-task
          Components: ozone
    Affects Versions: HDFS-7240
            Reporter: Mukul Kumar Singh
            Assignee: Mukul Kumar Singh
             Fix For: HDFS-7240


Cblock test TestLocalBlockCache, TestCBlockReadWrite and TestBufferManager are failing quite frequently.

Please find the analysis for each of these failure as following
*TestCBlockReadWrite* - Times out in the Jenkins run however it passes successfully in local runs

*TestCBlockReadWrite* - This test fails because of invalid assertion, as there can be time triggered flushes which are triggered and got finished, hence number of completed flushes need not be '1'
{code}
java.lang.AssertionError: expected:<1> but was:<13>
	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.cblock.TestCBlockReadWrite.testContainerWrites(TestCBlockReadWrite.java:245)
{code}

*TestBufferManager* - This assertion failed because there might be flushes which are in progress. A sleep need to be introduced to ensure that the entire dirty buffer is flused 
{code}
java.lang.AssertionError: expected:<16384> but was:<15976>
	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.cblock.TestBufferManager.testMultipleBuffersFlush(TestBufferManager.java:346)
{code}






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