Storage - Fix Flaky Stress Tests by browndav-msft · Pull Request #48359 · Azure/azure-sdk-for-java

browndav-msft · 2026-03-10T20:21:46Z

This is a fix to fix the issues we've been having with the stress tests.

- read functions had FAIL_FAST which would throw an error when the stream had reached then end and we wanted to read from the stream again. So we removed from both reads. - refactor code so that the exit criteria is a tthe beginning - refactor the emitContentInfo for dry

- changed emitValue to tryEmitValue - remove Sinks.EmitFailureHandler.FAIL_FAST so that multiple closes does not cause an error to be thrown

- opentelemetry-runtime-telemetry-java8 from 2.24.0-alpha -> 2.15.0-alpha - opentelemetry-logback-appender-1.0 from 2.24.0-alpha -> 2.15.0-alpha

… t0 beta.1

Copilot

Pull request overview

This PR aims to reduce flakiness in Storage stress tests by making cleanup more resilient, making CRC telemetry streams tolerate re-subscription/double-close behaviors, and aligning dependencies with the chosen OpenTelemetry runtime metrics version.

Changes:

Replace unconditional deletes with deleteIfExists() across multiple stress scenarios to avoid cleanup failures when resources are already gone.
Add retry/timeout-based global cleanup logic in scenario base classes and add retry logic to async runs.
Adjust CRC stream emission behavior to avoid failures on repeated terminal events; downgrade OpenTelemetry instrumentation dependencies to 2.15.0-alpha.

Reviewed changes

Copilot reviewed 24 out of 24 changed files in this pull request and generated 20 comments.

Show a summary per file

File	Description
sdk/storage/azure-storage-stress/src/main/java/com/azure/storage/stress/TelemetryHelper.java	Adjust JVM runtime metrics registration and make timeout/cancellation detection null-safe.
sdk/storage/azure-storage-stress/src/main/java/com/azure/storage/stress/CrcOutputStream.java	Switch sink emission to `tryEmitValue` to tolerate double-close.
sdk/storage/azure-storage-stress/src/main/java/com/azure/storage/stress/CrcInputStream.java	Refactor EOF emission, add resubscription state reset, and switch to `tryEmitValue`.
sdk/storage/azure-storage-stress/pom.xml	Downgrade OTel runtime telemetry + logback appender to `2.15.0-alpha`.
sdk/storage/azure-storage-file-share-stress/src/main/java/com/azure/storage/file/share/stress/UploadFromFile.java	Use `deleteIfExists()` during per-test cleanup.
sdk/storage/azure-storage-file-share-stress/src/main/java/com/azure/storage/file/share/stress/ShareScenarioBase.java	Add retrying global cleanup + async retry behavior and new logging.
sdk/storage/azure-storage-file-share-stress/pom.xml	Downgrade OTel runtime telemetry + logback appender to `2.15.0-alpha`.
sdk/storage/azure-storage-file-datalake-stress/src/main/java/com/azure/storage/file/datalake/stress/UploadFromFile.java	Use `deleteIfExists()` during per-test cleanup.
sdk/storage/azure-storage-file-datalake-stress/src/main/java/com/azure/storage/file/datalake/stress/Upload.java	Use `deleteIfExists()` during per-test cleanup.
sdk/storage/azure-storage-file-datalake-stress/src/main/java/com/azure/storage/file/datalake/stress/DataLakeScenarioBase.java	Add retrying global cleanup + async retry behavior and new logging.
sdk/storage/azure-storage-file-datalake-stress/pom.xml	Downgrade OTel runtime telemetry + logback appender to `2.15.0-alpha`.
sdk/storage/azure-storage-blob-stress/src/main/java/com/azure/storage/blob/stress/UploadPages.java	Use `deleteIfExists()` and swallow delete errors during cleanup.
sdk/storage/azure-storage-blob-stress/src/main/java/com/azure/storage/blob/stress/Upload.java	Use `deleteIfExists()` during per-test cleanup.
sdk/storage/azure-storage-blob-stress/src/main/java/com/azure/storage/blob/stress/StageBlock.java	Use `deleteIfExists()` during per-test cleanup.
sdk/storage/azure-storage-blob-stress/src/main/java/com/azure/storage/blob/stress/PageBlobScenarioBase.java	Add retrying global cleanup + async retry behavior and new logging.
sdk/storage/azure-storage-blob-stress/src/main/java/com/azure/storage/blob/stress/PageBlobOutputStream.java	Use `deleteIfExists()` and swallow delete errors during cleanup.
sdk/storage/azure-storage-blob-stress/src/main/java/com/azure/storage/blob/stress/CommitBlockList.java	Use `deleteIfExists()` during per-test cleanup.
sdk/storage/azure-storage-blob-stress/src/main/java/com/azure/storage/blob/stress/BlockBlobUpload.java	Use `deleteIfExists()` during per-test cleanup.
sdk/storage/azure-storage-blob-stress/src/main/java/com/azure/storage/blob/stress/BlockBlobOutputStream.java	Use `deleteIfExists()` during per-test cleanup.
sdk/storage/azure-storage-blob-stress/src/main/java/com/azure/storage/blob/stress/BlobScenarioBase.java	Add retrying global cleanup + async retry behavior and structured logging.
sdk/storage/azure-storage-blob-stress/src/main/java/com/azure/storage/blob/stress/AppendBlock.java	Use `deleteIfExists()` and swallow delete errors during cleanup.
sdk/storage/azure-storage-blob-stress/src/main/java/com/azure/storage/blob/stress/AppendBlobOutputStream.java	Use `deleteIfExists()` during per-test cleanup.
sdk/storage/azure-storage-blob-stress/pom.xml	Downgrade OTel runtime telemetry + logback appender to `2.15.0-alpha`.
sdk/parents/azure-client-sdk-parent/pom.xml	Downgrade `io.clientcore:linting-extensions` used by checkstyle plugin from beta.2 to beta.1.

...talake-stress/src/main/java/com/azure/storage/file/datalake/stress/DataLakeScenarioBase.java

.../azure-storage-blob-stress/src/main/java/com/azure/storage/blob/stress/BlobScenarioBase.java

sdk/storage/azure-storage-file-datalake-stress/pom.xml

sdk/storage/azure-storage-stress/src/main/java/com/azure/storage/stress/CrcOutputStream.java

...e-file-share-stress/src/main/java/com/azure/storage/file/share/stress/ShareScenarioBase.java

...re-storage-blob-stress/src/main/java/com/azure/storage/blob/stress/PageBlobScenarioBase.java

sdk/storage/azure-storage-stress/pom.xml

sdk/storage/azure-storage-file-share-stress/pom.xml

sdk/storage/azure-storage-stress/src/main/java/com/azure/storage/stress/CrcInputStream.java

...re-storage-blob-stress/src/main/java/com/azure/storage/blob/stress/PageBlobOutputStream.java

sdk/storage/azure-storage-stress/src/main/java/com/azure/storage/stress/CrcOutputStream.java

...e-file-share-stress/src/main/java/com/azure/storage/file/share/stress/ShareScenarioBase.java

.../azure-storage-blob-stress/src/main/java/com/azure/storage/blob/stress/BlobScenarioBase.java

ibrandes

i resolved all comments that i don't think need to be addressed right now, but there are still a couple lingering ones (make sure you expand hidden conversations). not sure how important the ones about globalCleanupAsync are, but i think we should address the ones about doOnError and deleteAllFilesInFileSystem, thoughts?

Copilot

Pull request overview

Copilot reviewed 23 out of 23 changed files in this pull request and generated 2 comments.

...e-file-share-stress/src/main/java/com/azure/storage/file/share/stress/ShareScenarioBase.java

sdk/storage/azure-storage-stress/src/main/java/com/azure/storage/stress/CrcOutputStream.java

Copilot

Pull request overview

Copilot reviewed 23 out of 23 changed files in this pull request and generated 5 comments.

.../azure-storage-blob-stress/src/main/java/com/azure/storage/blob/stress/BlobScenarioBase.java

...re-storage-blob-stress/src/main/java/com/azure/storage/blob/stress/PageBlobScenarioBase.java

...e-file-share-stress/src/main/java/com/azure/storage/file/share/stress/ShareScenarioBase.java

...talake-stress/src/main/java/com/azure/storage/file/datalake/stress/DataLakeScenarioBase.java

.../azure-storage-blob-stress/src/main/java/com/azure/storage/blob/stress/BlobScenarioBase.java

Copilot

Pull request overview

Copilot reviewed 28 out of 28 changed files in this pull request and generated 6 comments.

...e-file-share-stress/src/main/java/com/azure/storage/file/share/stress/ShareScenarioBase.java

...re-storage-blob-stress/src/main/java/com/azure/storage/blob/stress/PageBlobScenarioBase.java

...talake-stress/src/main/java/com/azure/storage/file/datalake/stress/DataLakeScenarioBase.java

.../azure-storage-blob-stress/src/main/java/com/azure/storage/blob/stress/BlobScenarioBase.java

sdk/storage/azure-storage-stress/pom.xml

sdk/storage/azure-storage-stress/src/main/java/com/azure/storage/stress/CrcOutputStream.java

… retries when ultimately successful

Copilot

Pull request overview

Copilot reviewed 27 out of 27 changed files in this pull request and generated 6 comments.

...talake-stress/src/main/java/com/azure/storage/file/datalake/stress/DataLakeScenarioBase.java

...e-file-share-stress/src/main/java/com/azure/storage/file/share/stress/ShareScenarioBase.java

sdk/storage/azure-storage-stress/src/main/java/com/azure/storage/stress/CrcInputStream.java

...talake-stress/src/main/java/com/azure/storage/file/datalake/stress/DataLakeScenarioBase.java

sdk/storage/azure-storage-file-datalake-stress/pom.xml

    <dependency>
      <groupId>io.opentelemetry.instrumentation</groupId>
      <artifactId>opentelemetry-runtime-telemetry-java8</artifactId>
-      <version>2.24.0-alpha</version> <!-- {x-version-update;io.opentelemetry.instrumentation:opentelemetry-runtime-telemetry-java8;external_dependency} -->
+      <version>2.15.0-alpha</version> <!-- {x-version-update;io.opentelemetry.instrumentation:opentelemetry-runtime-telemetry-java8;external_dependency} -->
    </dependency>
    <dependency>
      <groupId>io.opentelemetry.instrumentation</groupId>
      <artifactId>opentelemetry-logback-appender-1.0</artifactId>
-      <version>2.24.0-alpha</version> <!-- {x-version-update;io.opentelemetry.instrumentation:opentelemetry-logback-appender-1.0;external_dependency} -->
+      <version>2.15.0-alpha</version> <!-- {x-version-update;io.opentelemetry.instrumentation:opentelemetry-logback-appender-1.0;external_dependency} -->
    </dependency>


sdk/storage/azure-storage-stress/src/main/java/com/azure/storage/stress/CrcOutputStream.java

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

Copilot

Pull request overview

Copilot reviewed 27 out of 27 changed files in this pull request and generated 3 comments.

...e-file-share-stress/src/main/java/com/azure/storage/file/share/stress/ShareScenarioBase.java

...talake-stress/src/main/java/com/azure/storage/file/datalake/stress/DataLakeScenarioBase.java

Copilot

Pull request overview

Copilot reviewed 27 out of 27 changed files in this pull request and generated 8 comments.

sdk/storage/azure-storage-stress/src/main/java/com/azure/storage/stress/CrcOutputStream.java

sdk/storage/azure-storage-stress/src/main/java/com/azure/storage/stress/CrcInputStream.java

...talake-stress/src/main/java/com/azure/storage/file/datalake/stress/DataLakeScenarioBase.java

sdk/storage/azure-storage-stress/pom.xml

      <groupId>io.opentelemetry.instrumentation</groupId>
      <artifactId>opentelemetry-runtime-telemetry-java8</artifactId>
-      <version>2.24.0-alpha</version> <!-- {x-version-update;io.opentelemetry.instrumentation:opentelemetry-runtime-telemetry-java8;external_dependency} -->
+      <version>2.15.0-alpha</version> <!-- {x-version-update;io.opentelemetry.instrumentation:opentelemetry-runtime-telemetry-java8;external_dependency} -->


.../azure-storage-blob-stress/src/main/java/com/azure/storage/blob/stress/BlobScenarioBase.java

sdk/storage/azure-storage-blob-stress/pom.xml

      <groupId>io.opentelemetry.instrumentation</groupId>
      <artifactId>opentelemetry-runtime-telemetry-java8</artifactId>
-      <version>2.24.0-alpha</version> <!-- {x-version-update;io.opentelemetry.instrumentation:opentelemetry-runtime-telemetry-java8;external_dependency} -->
+      <version>2.15.0-alpha</version> <!-- {x-version-update;io.opentelemetry.instrumentation:opentelemetry-runtime-telemetry-java8;external_dependency} -->


sdk/storage/azure-storage-file-share-stress/pom.xml

      <groupId>io.opentelemetry.instrumentation</groupId>
      <artifactId>opentelemetry-runtime-telemetry-java8</artifactId>
-      <version>2.24.0-alpha</version> <!-- {x-version-update;io.opentelemetry.instrumentation:opentelemetry-runtime-telemetry-java8;external_dependency} -->
+      <version>2.15.0-alpha</version> <!-- {x-version-update;io.opentelemetry.instrumentation:opentelemetry-runtime-telemetry-java8;external_dependency} -->


sdk/storage/azure-storage-file-datalake-stress/pom.xml

      <groupId>io.opentelemetry.instrumentation</groupId>
      <artifactId>opentelemetry-runtime-telemetry-java8</artifactId>
-      <version>2.24.0-alpha</version> <!-- {x-version-update;io.opentelemetry.instrumentation:opentelemetry-runtime-telemetry-java8;external_dependency} -->
+      <version>2.15.0-alpha</version> <!-- {x-version-update;io.opentelemetry.instrumentation:opentelemetry-runtime-telemetry-java8;external_dependency} -->


… failures upon success

ibrandes

lgtm!

browndav-msft added 7 commits March 5, 2026 13:51

removed enableDeterministic

96fb58f

change .delete() to .deleteIfExists()

0db7e67

prevent crashes on reattempted close on stream

025a9e4

- changed emitValue to tryEmitValue - remove Sinks.EmitFailureHandler.FAIL_FAST so that multiple closes does not cause an error to be thrown

fix telemetry so that it doesnt swallow errors

30bd8dc

roll back two deps because they were causing failures in the containers

303ad80

- opentelemetry-runtime-telemetry-java8 from 2.24.0-alpha -> 2.15.0-alpha - opentelemetry-logback-appender-1.0 from 2.24.0-alpha -> 2.15.0-alpha

rollback azure-client-sdk-parent linting extensions from 1.0.0-beta.2…

0a25f4d

… t0 beta.1

github-actions bot added Azure.Core azure-core Storage Storage Service (Queues, Blobs, Files) labels Mar 10, 2026

ibrandes marked this pull request as ready for review March 10, 2026 23:35

ibrandes requested review from alzimmermsft and gunjansingh-msft as code owners March 10, 2026 23:35

Copilot AI review requested due to automatic review settings March 10, 2026 23:35

ibrandes requested review from a team, JonathanGiles, ibrandes, kyleknap, samvaity, seanmcc-msft and srnagar as code owners March 10, 2026 23:35

Copilot started reviewing on behalf of ibrandes March 10, 2026 23:36 View session

ibrandes changed the title ~~Fix flaky tests~~ Storage - Fix Flaky Stress Tests Mar 10, 2026

Copilot AI reviewed Mar 10, 2026

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ibrandes reviewed Mar 10, 2026

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revert linting extensions to beta2

ec051d8

browndav-msft requested a review from ibrandes March 11, 2026 17:04

browndav-msft added 3 commits March 11, 2026 14:57

remove comments with old code

8917a7c

add logging for errors

9ba9c62

remove catches for double close issue and okay status

ec879d5

ibrandes reviewed Mar 12, 2026

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Copilot started reviewing on behalf of browndav-msft March 16, 2026 01:30 View session

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...e-file-share-stress/src/main/java/com/azure/storage/file/share/stress/ShareScenarioBase.java Outdated Show resolved Hide resolved

sdk/storage/azure-storage-stress/src/main/java/com/azure/storage/stress/CrcOutputStream.java Show resolved Hide resolved

incorporate copilot suggestions

6efe321

browndav-msft requested review from Copilot and ibrandes March 16, 2026 15:10

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browndav-msft added 2 commits March 16, 2026 11:58

fix all deletes to make sync and wrap in try-catch

5839164

fix tests so that super.globalCleanupAsync() is only called once

9850c8a

browndav-msft requested a review from Copilot March 16, 2026 16:26

Copilot started reviewing on behalf of browndav-msft March 16, 2026 16:27 View session

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browndav-msft added 2 commits March 16, 2026 12:49

change telemetry to loggin only returns final state instead of failed…

462a4b0

… retries when ultimately successful

undo versio downgrade for linting-extensions

43886c3

browndav-msft requested a review from Copilot March 16, 2026 17:11

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Fixing spacing in error messages

617c585

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

browndav-msft requested a review from Copilot March 16, 2026 18:55

Copilot started reviewing on behalf of browndav-msft March 16, 2026 18:56 View session

ibrandes removed request for JonathanGiles, samvaity and srnagar March 16, 2026 18:59

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refactor datalake delete all so that it is easier to read

26b3a37

browndav-msft requested a review from Copilot March 16, 2026 19:33

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refactor runAsync in ShareScenarioBase so retry failures dont show as…

81c818e

… failures upon success

ibrandes approved these changes Mar 16, 2026

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