for (daemon in daemonsFixture.daemons) {
                if (daemon.logContains('Could not receive message from client.')
                    && daemon.logContains('java.lang.NullPointerException')
                    && daemon.logContains('org.gradle.launcher.daemon.server.exec.LogToClient')) {

import static org.gradle.api.JavaVersion.VERSION_1_8

class JavaExecJavaVersionIntegrationSpec extends AbstractIntegrationSpec {

    def setup() {
        // Without this, executing the JavaExec tasks leave behind running daemons.
        executer.requireDaemon().requireIsolatedDaemons()
    }

    @Requires([IntegTestPreconditions.LowestSupportedLTSJavaHomeAvailable, IntegTestPreconditions.HighestSupportedLTSJavaHomeAvailable ])

            def requestedTargetJdk = project.findProperty("targetJdk")

            // Earlier versions of Gradle can sometimes fail to connect to the just started Gradle daemon.
            // The failure will be the "tried to connect to 100 daemons" error
            // If we're testing against a version that has this problem, we can ignore it.

        given:
        def defaultDaemonDir = testKitDir.file("daemon")
        def nonTestKitDaemons = daemons(defaultDaemonDir, gradleVersion)

        when:
        runner().build()

        then:
        def testKitDaemon = testKitDaemons().daemon
        testKitDaemon.assertIdle()
        nonTestKitDaemons.visible.empty

        when:

import java.util.Optional;

class WorkerDaemonClient implements Stoppable, Describable {
    public static final String DISABLE_EXPIRATION_PROPERTY_KEY = "org.gradle.workers.internal.disable-daemons-expiration";
    private final DaemonForkOptions forkOptions;
    private final MultiRequestClient<TransportableActionExecutionSpec, DefaultWorkResult> workerClient;
    private final WorkerProcess workerProcess;

        if (!gradle.daemonIdleTimeoutConfigurable && OperatingSystem.current().isWindows()) {
            // Older daemon don't have configurable ttl and they hung for 3 hours afterwards.
            // This is a real problem on windows due to eager file locking and continuous CI failures.
            // On linux it's a lesser problem - long-lived daemons hung and steal resources but don't lock files.

        return selector.getReleasedBytes();
    }

    /**
     * Simple implementation of memory based expiration.
     *
     * Use the maximum heap size of each daemon, not their actual memory usage.
     * Expire as much daemons as needed to free the requested memory under the threshold.
     */
    private class SimpleMemoryExpirationSelector implements Transformer<List<WorkerDaemonClient>, List<WorkerDaemonClient>> {

    private
    val daemonPids = ConcurrentHashMap.newKeySet<String>()

    private
    val logger = Logging.getLogger(DaemonTracker::class.java)

    override fun close() {
        logger.lifecycle("Cleaning up daemons...")
        cleanUpDaemons()
    }

    fun newDaemonListener() =
        object : TestListener {
            override fun beforeTest(test: TestDescriptor) = Unit

     *
     * @return The builder.
     * @since 4.8
     */
    BuildActionExecuter.Builder action();

    /**
     * Notifies all daemons about file changes made by an external process, like an IDE.
     *
     * <p>The daemons will use this information to update the retained file system state.
     *
     * <p>The method should be invoked on every change done by the external process.

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.gradle.launcher.daemon.testing

import org.gradle.launcher.daemon.registry.DaemonRegistry
import org.gradle.internal.concurrent.DefaultExecutorFactory
import org.gradle.internal.concurrent.ManagedExecutor
import org.gradle.internal.concurrent.Stoppable