/**
 * Thrown when a daemon disconnects unexpectedly while a client is interacting with it.
 */
public class DaemonDisappearedException extends GradleException {

    public static final String MESSAGE = "Gradle build daemon disappeared unexpectedly (it may have been killed or may have crashed)";

    public DaemonDisappearedException() {
        super(MESSAGE);
    }

import org.gradle.integtests.fixtures.daemon.DaemonClientFixture
import org.gradle.integtests.fixtures.daemon.DaemonIntegrationSpec
import org.gradle.launcher.daemon.client.DaemonDisappearedException
import org.gradle.launcher.daemon.logging.DaemonMessages
import org.gradle.test.fixtures.server.http.BlockingHttpServer
import org.gradle.test.precondition.Requires

import org.gradle.initialization.StartParameterBuildOptions
import org.gradle.integtests.fixtures.executer.OutputScrapingExecutionResult
import org.gradle.internal.os.OperatingSystem
import org.gradle.launcher.daemon.client.DaemonDisappearedException
import org.gradle.testkit.runner.fixtures.HideEnvVariableValuesInDaemonLog
import org.gradle.testkit.runner.fixtures.InspectsBuildOutput
import org.gradle.testkit.runner.fixtures.InspectsExecutedTasks

                    toolingApi.daemons.daemon.kill()
                    killed = true
                }
            }, EnumSet.of(OperationType.TEST)).run()
        }

        then: "build fails with a DaemonDisappearedException"
        GradleConnectionException ex = thrown()
        ex.cause.message.contains('Gradle build daemon disappeared unexpectedly')

        and:
        !result.empty
    }

    def goodCode() {

        parameters.currentDir >> new File(".")

        when:
        client.execute(Stub(BuildAction), parameters, Stub(ClientBuildRequestContext))

        then:
        thrown(DaemonDisappearedException)

        and:
        connector.connect(compatibilitySpec) >> connection
        _ * connection.daemon >> Stub(DaemonConnectDetails)
        1 * connection.dispatch({ it instanceof Build })

        findCrashLogFile(build, diagnostics).ifPresent(crashLogFile ->
            LOGGER.error("JVM crash log found: " + new ConsoleRenderer().asClickableFileUrl(crashLogFile))
        );
        throw new DaemonDisappearedException();
    }

    /**
     * <a href="https://stackoverflow.com/a/5154619/104894">See why this logic exists in this SO post.</a>
     */

Class <org.gradle.launcher.daemon.client.DaemonDisappearedException> is not annotated (directly or via its package) with @org.gradle.api.NonNullApi in (DaemonDisappearedException.java:0)
Class <org.gradle.launcher.daemon.client.DaemonGreeter> is not annotated (directly or via its package) with @org.gradle.api.NonNullApi in (DaemonGreeter.java:0)