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https://issues.apache.org/jira/browse/IGNITE-19255?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Aleksandr Polovtcev updated IGNITE-19255:
-----------------------------------------
Description:
In IGNITE-19105 I've changed some internal shenanigans of the
MetaStorageManager (without affecting its API in any way). After that, nearly
all unit tests in the {{distribution-zones}} module started to fail. Turns out
it happened because of extensive mock usages that emulate behavior of the Meta
Storage. So I decided to replace it with the {{StandaloneMetaStorageManager}}
implementation and all hell broke loose: many tests emulate Meta Storage
incorrectly, a lot of races appeared, because many methods became truly
asynchronous.
This situation is very frustrating: a different component internals were
changed with no API changes and a completely unrelated module is not longer
able to pass its tests. Though I fixed most of the failures, some tests are
still failing and I'm going to try to describe, what's wrong with them:
*{{DistributionZoneManagerScaleUpTest#testDataNodesPropagationAfterScaleUpTriggeredOnNewCluster}}*
- this test tests a scenario when we start a node after logical topology was
updated. I don't know how realistic is this scenario, but the problem is that
"data nodes" don't get populated with the logical topology nodes on
{{distributionZoneManager}} start, because {{scheduleTimers}} method, that
get's invoked from the Meta Storage Watch, doesn't go inside the {{if
(!addedNodes.isEmpty() && autoAdjustScaleUp != INFINITE_TIMER_VALUE)}} branch,
was:
In IGNITE-19105 I've changed some internal shenanigans of the
MetaStorageManager (without affecting its API in any way). After that, nearly
all unit tests in the {{distribution-zones}} module started to fail. Turns out
it happened because of extensive mock usages that emulate behavior of the Meta
Storage. So I decided to replace it with the {{StandaloneMetaStorageManager}}
implementation and all hell broke loose: many tests emulate Meta Storage
incorrectly, a lot of races appeared, because many methods became truly
asynchronous.
This situation is very frustrating: a different component internals were
changed with no API changes and a completely unrelated module is not longer
able to pass its tests. Though I fixed most of the failures, some tests are
still failing and I'm going to try to describe, what's wrong with them:
*{{DistributionZoneManagerScaleUpTest#testDataNodesPropagationAfterScaleUpTriggeredOnNewCluster}}*
- this test tests a scenario when we start a node after logical topology was
updated. I don't know how realistic is this scenario, but the problem is that
"data nodes" don't get populated with the logical topology nodes on
{{distributionZoneManager}} start, because {{scheduleTimers}} method, that
get's invoked from the Meta Storage Watch doesn't go inside the {{if
(!addedNodes.isEmpty() && autoAdjustScaleUp != INFINITE_TIMER_VALUE)}} branch,
> Fix broken unit tests in distribution-zones module
> --------------------------------------------------
>
> Key: IGNITE-19255
> URL: https://issues.apache.org/jira/browse/IGNITE-19255
> Project: Ignite
> Issue Type: Bug
> Reporter: Aleksandr Polovtcev
> Priority: Blocker
> Labels: ignite-3
>
> In IGNITE-19105 I've changed some internal shenanigans of the
> MetaStorageManager (without affecting its API in any way). After that, nearly
> all unit tests in the {{distribution-zones}} module started to fail. Turns
> out it happened because of extensive mock usages that emulate behavior of the
> Meta Storage. So I decided to replace it with the
> {{StandaloneMetaStorageManager}} implementation and all hell broke loose:
> many tests emulate Meta Storage incorrectly, a lot of races appeared, because
> many methods became truly asynchronous.
> This situation is very frustrating: a different component internals were
> changed with no API changes and a completely unrelated module is not longer
> able to pass its tests. Though I fixed most of the failures, some tests are
> still failing and I'm going to try to describe, what's wrong with them:
> *{{DistributionZoneManagerScaleUpTest#testDataNodesPropagationAfterScaleUpTriggeredOnNewCluster}}*
> - this test tests a scenario when we start a node after logical topology was
> updated. I don't know how realistic is this scenario, but the problem is that
> "data nodes" don't get populated with the logical topology nodes on
> {{distributionZoneManager}} start, because {{scheduleTimers}} method, that
> get's invoked from the Meta Storage Watch, doesn't go inside the {{if
> (!addedNodes.isEmpty() && autoAdjustScaleUp != INFINITE_TIMER_VALUE)}} branch,
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