Ted Yu created HBASE-21097:
------------------------------
Summary: Flush pressure assertion may fail in
testFlushThroughputTuning
Key: HBASE-21097
URL: https://issues.apache.org/jira/browse/HBASE-21097
Project: HBase
Issue Type: Test
Reporter: Ted Yu
>From
>https://builds.apache.org/job/PreCommit-HBASE-Build/14137/artifact/patchprocess/patch-unit-hbase-server.txt
> :
{code}
[ERROR]
testFlushThroughputTuning(org.apache.hadoop.hbase.regionserver.throttle.TestFlushWithThroughputController)
Time elapsed: 17.446 s <<< FAILURE!
java.lang.AssertionError: expected:<0.0> but was:<1.2906294173808417E-6>
at
org.apache.hadoop.hbase.regionserver.throttle.TestFlushWithThroughputController.testFlushThroughputTuning(TestFlushWithThroughputController.java:185)
{code}
Here is the related assertion:
{code}
assertEquals(0.0, regionServer.getFlushPressure(), EPSILON);
{code}
where EPSILON = 1E-6
In the above case, due to margin of 2.9E-7, the assertion didn't pass.
It seems the epsilon can be adjusted to accommodate different workload /
hardware combination.
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