StackWalkNativeToJava.java FAILED in Test_openjdk21_hs_sanity.openjdk_aarch64_alpine-linux

**Failing Test Info**
Test Name: #runtime/ErrorHandling/StackWalkNativeToJava.java
Test Duration: ~35 seconds
Machine it fails on: [test-docker-alpine320-armv8-4](https://ci.adoptium.net/computer/test-docker-alpine320-armv8-4)
Machines it passes on (if intermittent): [test-docker-alpine320-armv8-3](https://ci.adoptium.net/computer/test-docker-alpine320-armv8-3)

**Jenkins Test Job Info**
Jenkins Test Job Name: Test_openjdk21_hs_sanity.openjdk_aarch64_alpine-linux_testList_0
Jenkins Test Job URL: https://ci.adoptium.net/job/Test_openjdk21_hs_sanity.openjdk_aarch64_alpine-linux_testList_0/58/
TRSS link for the build (if available): https://trss.adoptium.net/allTestsInfo?buildId=696106594a4969006d27b2a5&limit=1

**Deep History Link from TRSS (if available)**

https://trss.adoptium.net/deepHistory?testId=696108bd4a4969006d27cc41

** Rerun in Grinder Link (if available) or Steps to Reproduce**

[Grinder rerun link.](https://ci.adoptium.net/job/Grinder/parambuild/?SDK_RESOURCE=upstream&TARGET=hotspot_custom&BASE_DOCKER_REGISTRY_CREDENTIAL_ID=&TEST_FLAG=&UPSTREAM_TEST_JOB_NAME=Test_openjdk21_hs_sanity.openjdk_aarch64_alpine-linux&DOCKER_REQUIRED=false&ACTIVE_NODE_TIMEOUT=5&VENDOR_TEST_DIRS=&EXTRA_DOCKER_ARGS=&TKG_OWNER_BRANCH=adoptium%3Amaster&OPENJ9_SYSTEMTEST_OWNER_BRANCH=eclipse%3Amaster&PLATFORM=aarch64_alpine-linux&GENERATE_JOBS=false&KEEP_REPORTDIR=true&PERSONAL_BUILD=false&DOCKER_REGISTRY_DIR=&RERUN_ITERATIONS=0&ADOPTOPENJDK_REPO=https%3A%2F%2Fgithub.com%2Fadoptium%2Faqa-tests.git&SETUP_JCK_RUN=false&DOCKER_REGISTRY_URL_CREDENTIAL_ID=&LABEL=&EXTRA_OPTIONS=&CUSTOMIZED_SDK_URL=&BUILD_IDENTIFIER=&JENKINS_KEY=&ADOPTOPENJDK_BRANCH=master&LIGHT_WEIGHT_CHECKOUT=false&USE_JRE=false&ARTIFACTORY_SERVER=&KEEP_WORKSPACE=false&USER_CREDENTIALS_ID=&JDK_VERSION=21&DOCKER_REGISTRY_URL=&ITERATIONS=1&VENDOR_TEST_REPOS=&JDK_REPO=https%3A%2F%2Fgithub.com%2Fadoptium%2Fjdk21u&JCK_GIT_BRANCH=master&OPENJ9_BRANCH=master&OPENJ9_SHA=&JCK_GIT_REPO=&VENDOR_TEST_BRANCHES=&UPSTREAM_JOB_NAME=build-scripts%2Fjobs%2Fjdk21u%2Fjdk21u-alpine-linux-aarch64-temurin&OPENJ9_REPO=https%3A%2F%2Fgithub.com%2Feclipse-openj9%2Fopenj9.git&CLOUD_PROVIDER=&CUSTOM_TARGET=runtime%2FErrorHandling%2FStackWalkNativeToJava.java&VENDOR_TEST_SHAS=&JDK_BRANCH=dev&LABEL_ADDITION=&ARTIFACTORY_REPO=&ARTIFACTORY_ROOT_DIR=&UPSTREAM_TEST_JOB_NUMBER=110&DOCKERIMAGE_TAG=&TEST_TIME=&JDK_IMPL=hotspot&SSH_AGENT_CREDENTIAL=&AUTO_DETECT=true&SLACK_CHANNEL=aqavit-bot&DYNAMIC_COMPILE=false&RELATED_NODES=&ADOPTOPENJDK_SYSTEMTEST_OWNER_BRANCH=adoptium%3Amaster&APPLICATION_OPTIONS=&CUSTOMIZED_SDK_URL_CREDENTIAL_ID=eclipse_temurin_bot_email_and_token&ARCHIVE_TEST_RESULTS=false&NUM_MACHINES=&OPENJDK_SHA=&TRSS_URL=&RERUN_FAILURE=false&USE_TESTENV_PROPERTIES=false&BUILD_LIST=openjdk&ADDITIONAL_ARTIFACTS_REQUIRED=&UPSTREAM_JOB_NUMBER=159&STF_OWNER_BRANCH=adoptium%3Amaster&TIME_LIMIT=25&JVM_OPTIONS=&PARALLEL=None)

**Java Version output (from console output)**

```
18:48:52 openjdk version "21.0.10-beta" 2026-01-20
18:48:52 OpenJDK Runtime Environment Temurin-21.0.10+6-202601081541 (build 21.0.10-beta+6-202601081541)
18:48:52 OpenJDK 64-Bit Server VM Temurin-21.0.10+6-202601081541 (build 21.0.10-beta+6-202601081541, mixed mode, sharing)
```

**Relevant Console Output (showing exceptions/errors/crashes)**

```
19:16:56 STDERR:
19:16:56 java.lang.RuntimeException: Count error: count was 1
19:16:56 at StackWalkNativeToJava.assertTrue(StackWalkNativeToJava.java:131)
19:16:56 at StackWalkNativeToJava.testStackWalkNativeToJavaNative(StackWalkNativeToJava.java:73)
19:16:56 at StackWalkNativeToJava.main(StackWalkNativeToJava.java:48)
19:16:56 at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
19:16:56 at java.base/java.lang.reflect.Method.invoke(Method.java:580)
19:16:56 at com.sun.javatest.regtest.agent.MainActionHelper$AgentVMRunnable.run(MainActionHelper.java:333)
19:16:56 at java.base/java.lang.Thread.run(Thread.java:1583)
19:16:56
19:16:56 JavaTest Message: Test threw exception: java.lang.RuntimeException
19:16:56 JavaTest Message: shutting down test
```

**Attach or link to relevant artifacts**

[StackWalkNativeToJava.jtr.txt](https://github.com/user-attachments/files/25231856/StackWalkNativeToJava.jtr.txt)
[StackWalkNativeToJava.jtr.xml](https://github.com/user-attachments/files/25231857/StackWalkNativeToJava.jtr.xml)

Start with the Grinder rerun for runtime/ErrorHandling/StackWalkNativeToJava.java on aarch64 Alpine Linux, then inspect the failure and artifacts linked in the issue. Read StackWalkNativeToJava.java around lines 73 and 131 to understand the count assertion. Done means determining the failure cause and restoring a passing test on the affected configuration.

Written by the indexing model from the issue text.