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Try using a test task specific folder for user preference to avoid file locks #10083

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Try using a test task specific folder for user preference to avoid file locks #10083

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d996002
fix: Try using a test task specific folder for user preference to avo…
bric3 Dec 4, 2025
4945696
fix: Use a temporary preference folder for gradle smoke tests
bric3 Dec 5, 2025
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4 changes: 4 additions & 0 deletions buildSrc/src/main/kotlin/dd-trace-java.configure-tests.gradle.kts
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Original file line number Diff line number Diff line change
Expand Up @@ -42,6 +42,10 @@ tasks.withType<Test>().configureEach {
!rootProject.providers.gradleProperty("rerun.tests.${project.name}").isPresent
}

// Trick to avoid on CI: "Couldn't flush user prefs: java.util.prefs.BackingStoreException: Couldn't get file lock."
// Use a task-specific user prefs directory
systemProperty("java.util.prefs.userRoot", "$buildDir/tmp/userPrefs/${name}")

// Split up tests that want to run forked in their own separate JVM for generated tasks
if (name.startsWith("forkedTest") || name.endsWith("ForkedTest")) {
setExcludes(emptyList())
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10 changes: 10 additions & 0 deletions ...ity-test-fixtures/src/main/groovy/datadog/trace/civisibility/CiVisibilitySmokeTest.groovy
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Expand Up @@ -7,8 +7,11 @@ import datadog.trace.api.config.GeneralConfig
import datadog.trace.api.config.TraceInstrumentationConfig
import datadog.trace.api.config.TracerConfig
import spock.lang.Specification
import spock.lang.TempDir
import spock.util.environment.Jvm

import java.nio.file.Path

import static datadog.trace.util.ConfigStrings.propertyNameToSystemPropertyName

abstract class CiVisibilitySmokeTest extends Specification {
Expand All @@ -21,6 +24,9 @@ abstract class CiVisibilitySmokeTest extends Specification {

private static final Map<String,String> DEFAULT_TRACER_CONFIG = defaultJvmArguments()

@TempDir
protected Path prefsDir

protected static String buildJavaHome() {
if (Jvm.current.isJava8()) {
return System.getenv("JAVA_8_HOME")
Expand Down Expand Up @@ -69,6 +75,10 @@ abstract class CiVisibilitySmokeTest extends Specification {

protected List<String> buildJvmArguments(String mockBackendIntakeUrl, String serviceName, Map<String, String> additionalArgs) {
List<String> arguments = []

// Trick to avoid on CI: "Couldn't flush user prefs: java.util.prefs.BackingStoreException: Couldn't get file lock."
arguments += "-Djava.util.prefs.userRoot=${prefsDir.toAbsolutePath()}"

Map<String, String> argMap = buildJvmArgMap(mockBackendIntakeUrl, serviceName, additionalArgs)

// for convenience when debugging locally
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