[jira] [Created] (CASSANDRA-13070) unittest antiCompactionSizeTest is unstable

["Jay Zhuang (JIRA)" <ji...@apache.org>]

Jay Zhuang created CASSANDRA-13070:
--------------------------------------

             Summary: unittest antiCompactionSizeTest is unstable
                 Key: CASSANDRA-13070
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-13070
             Project: Cassandra
          Issue Type: Bug
          Components: Testing
            Reporter: Jay Zhuang
            Assignee: Jay Zhuang


Unittest {{org.apache.cassandra.db.compaction.AntiCompactionTest.antiCompactionSizeTest}} is failing from time to time on branch 3.0 ([13e9396|https://github.com/apache/cassandra/commit/13e939624d21eaf6e16d60b28636125e817ab286]):
{code}
    [junit] Testcase: antiCompactionSizeTest(org.apache.cassandra.db.compaction.AntiCompactionTest):    FAILED
    [junit] expected:<1.29786604E8> but was:<1.13623354E8>
    [junit] junit.framework.AssertionFailedError: expected:<1.29786604E8> but was:<1.13623354E8>
    [junit]     at org.apache.cassandra.db.compaction.AntiCompactionTest.antiCompactionSizeTest(AntiCompactionTest.java:164)
{code}

Run the single test 21 times:
{code}
for i in {0..20}; do echo ==$i; ant testsome -Dtest.name=org.apache.cassandra.db.compaction.AntiCompactionTest -Dtest.methods=antiCompactionSizeTest; echo $i $? >> ~/testresult; done
{code}
On mac, it passed for 5 times, on linux it passed for 6 times.



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