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https://issues.apache.org/jira/browse/HBASE-24894?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17179248#comment-17179248
]
Nick Dimiduk commented on HBASE-24894:
--------------------------------------
Not much of anything in the log,
{noformat}
<testcase name="testMoveCostMultiplier"
classname="org.apache.hadoop.hbase.master.balancer.TestStochasticLoadBalancer"
time="0.031">
<failure message="expected:<3.0> but was:<7.0>"
type="java.lang.AssertionError"><![CDATA[java.lang.AssertionError:
expected:<3.0> but was:<7.0>
at
org.apache.hadoop.hbase.master.balancer.TestStochasticLoadBalancer.testMoveCostMultiplier(TestStochasticLoadBalancer.java:304)
]]></failure>
<system-err><![CDATA[2020-08-13 23:11:59,538 INFO [Time-limited test]
hbase.ResourceChecker(179): after:
master.balancer.TestStochasticLoadBalancer#testCostAfterUndoAction Thread=9
(was 9), OpenFileDescriptor=220 (was 220), MaxFileDescriptor=1048576 (was
1048576), SystemLoadAverage=781 (was 781), ProcessCount=18 (was 18),
AvailableMemoryMB=15204 (was 15215)
2020-08-13 23:11:59,546 INFO [Time-limited test] hbase.ResourceChecker(151):
before: master.balancer.TestStochasticLoadBalancer#testMoveCostMultiplier
Thread=9, OpenFileDescriptor=220, MaxFileDescriptor=1048576,
SystemLoadAverage=781, ProcessCount=18, AvailableMemoryMB=15204
]]></system-err>
<rerunFailure message="expected:<3.0> but was:<7.0>"
type="java.lang.AssertionError">
<stackTrace><![CDATA[java.lang.AssertionError: expected:<3.0> but
was:<7.0>
at
org.apache.hadoop.hbase.master.balancer.TestStochasticLoadBalancer.testMoveCostMultiplier(TestStochasticLoadBalancer.java:304)
]]></stackTrace>
<system-err><![CDATA[2020-08-13 23:12:07,211 INFO [Time-limited test]
balancer.BaseLoadBalancer(1054): slop=0.0, systemTablesOnMaster=false
2020-08-13 23:12:07,211 INFO [Time-limited test]
balancer.StochasticLoadBalancer(225): Loaded config; maxSteps=1000000,
stepsPerRegion=800, maxRunningTime=30000, isByTable=false,
CostFunctions=[RegionCountSkewCostFunction, PrimaryRegionCountSkewCostFunction,
MoveCostFunction, ServerLocalityCostFunction, RackLocalityCostFunction,
TableSkewCostFunction, RegionReplicaHostCostFunction,
RegionReplicaRackCostFunction, ReadRequestCostFunction, CPRequestCostFunction,
WriteRequestCostFunction, MemStoreSizeCostFunction, StoreFileCostFunction] etc.
2020-08-13 23:12:07,220 INFO [Time-limited test] hbase.ResourceChecker(151):
before: master.balancer.TestStochasticLoadBalancer#testMoveCostMultiplier
Thread=9, OpenFileDescriptor=220, MaxFileDescriptor=1048576,
SystemLoadAverage=759, ProcessCount=18, AvailableMemoryMB=16033
]]></system-err>
</rerunFailure>
<rerunFailure message="expected:<3.0> but was:<7.0>"
type="java.lang.AssertionError">
<stackTrace><![CDATA[java.lang.AssertionError: expected:<3.0> but
was:<7.0>
at
org.apache.hadoop.hbase.master.balancer.TestStochasticLoadBalancer.testMoveCostMultiplier(TestStochasticLoadBalancer.java:304)
]]></stackTrace>
<system-err><![CDATA[2020-08-13 23:12:07,264 INFO [Time-limited test]
balancer.BaseLoadBalancer(1054): slop=0.0, systemTablesOnMaster=false
2020-08-13 23:12:07,264 INFO [Time-limited test]
balancer.StochasticLoadBalancer(225): Loaded config; maxSteps=1000000,
stepsPerRegion=800, maxRunningTime=30000, isByTable=false,
CostFunctions=[RegionCountSkewCostFunction, PrimaryRegionCountSkewCostFunction,
MoveCostFunction, ServerLocalityCostFunction, RackLocalityCostFunction,
TableSkewCostFunction, RegionReplicaHostCostFunction,
RegionReplicaRackCostFunction, ReadRequestCostFunction, CPRequestCostFunction,
WriteRequestCostFunction, MemStoreSizeCostFunction, StoreFileCostFunction] etc.
2020-08-13 23:12:07,270 INFO [Time-limited test] hbase.ResourceChecker(151):
before: master.balancer.TestStochasticLoadBalancer#testMoveCostMultiplier
Thread=9, OpenFileDescriptor=220, MaxFileDescriptor=1048576,
SystemLoadAverage=759, ProcessCount=18, AvailableMemoryMB=16024
]]></system-err>
</rerunFailure>
</testcase>
{noformat}
> [Flakey Test] TestStochasticLoadBalancer.testMoveCostMultiplier
> ---------------------------------------------------------------
>
> Key: HBASE-24894
> URL: https://issues.apache.org/jira/browse/HBASE-24894
> Project: HBase
> Issue Type: Test
> Components: Balancer, master, test
> Affects Versions: 3.0.0-alpha-1, 2.3.0
> Reporter: Nick Dimiduk
> Priority: Major
>
> I've noticed this test has gotten flakey on a couple PRs. The only recent
> change to the class under test is HBASE-24709.
> Failure looks like:
> {noformat}
> [ERROR] Failures:
> [ERROR]
> org.apache.hadoop.hbase.master.balancer.TestStochasticLoadBalancer.testMoveCostMultiplier
> [ERROR] Run 1: TestStochasticLoadBalancer.testMoveCostMultiplier:304
> expected:<3.0> but was:<7.0>
> [ERROR] Run 2: TestStochasticLoadBalancer.testMoveCostMultiplier:304
> expected:<3.0> but was:<7.0>
> [ERROR] Run 3: TestStochasticLoadBalancer.testMoveCostMultiplier:304
> expected:<3.0> but was:<7.0>
> {noformat}
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