KAFKA-17479 Fix ignoreFailures logic in CI workflow [3/n]

build.gradle

@@ -470,8 +470,11 @@ subprojects {
   def testsToExclude = ['**/*Suite.class']
 
   test {
+    ext {
+      hadFailure = false  // Used to track if any tests failed, see afterSuite below
+    }
     maxParallelForks = maxTestForks
-    ignoreFailures = userIgnoreFailures
+    ignoreFailures = true
 
     maxHeapSize = defaultMaxHeapSize
     jvmArgs = defaultJvmArgs
@@ -499,6 +502,32 @@ subprojects {
         maxFailures = userMaxTestRetryFailures
       }
     }
+
+    // As we process results, check if there were any test failures.
+    afterSuite { desc, result ->
+      if (result.resultType == TestResult.ResultType.FAILURE) {
+        ext.hadFailure = true
+      }
+    }
+
+    // This closure will copy JUnit XML files out of the sub-project's build directory and into
+    // a top-level build/junit-xml directory. This is necessary to avoid reporting on tests which
+    // were not run, but instead were restored via FROM-CACHE. See KAFKA-17479 for more details.
+    //
+    // This closure will not run if a test fails and ignoreFailures is not true.
+    doLast {
+      def dest = rootProject.layout.buildDirectory.dir("junit-xml/${project.name}").get().asFile
+      println "Copy JUnit XML for ${project.name} to $dest"
+      ant.copy(todir: "$dest") {
+        ant.fileset(dir: "${test.reports.junitXml.entryPoint}")
+      }
+
+      // If there were any test failures, we want to fail the task to prevent the failures
+      // from being cached.
+      if (ext.hadFailure) {
+        throw new GradleException("Failing this task since '${project.name}:${name}' had test failures.")
+      }
+    }
   }
 
   task integrationTest(type: Test, dependsOn: compileJava) {
@@ -569,14 +598,6 @@ subprojects {
       delete t.reports.junitXml.outputLocation
       delete t.reports.html.outputLocation
     }
-
-    doLast {
-      def dest = rootProject.layout.buildDirectory.dir("junit-xml/${project.name}").get().asFile
-      println "Copy JUnit XML for ${project.name} to $dest"
-      ant.copy(todir: "$dest") {
-        ant.fileset(dir: "${test.reports.junitXml.entryPoint}")
-      }
-    }
   }
 
   jar {