Failed
com.sun.ts.tests.websocket.ee.jakarta.websocket.server.pathparam.WSClient.multipleStringParamsOnMessageTest_from_standalone (from websocket-tck)
Failing for the past 1 build
(Since Unstable
)
Error Message
test result: Failed. Test case throws exception: [WebSocketCommonClient] multipleStringParamsOnMessageTest failed! Check output for cause of failure.
Stacktrace
test result: Failed. Test case throws exception: [WebSocketCommonClient] multipleStringParamsOnMessageTest failed! Check output for cause of failure.
Standard Output
#Test Results (version 2) #Wed Aug 19 10:53:17 UTC 2020 #-----testdescription----- $file=/home/jenkins/agent/workspace/jakartaee-tck_master/websocket-tck/src/com/sun/ts/tests/websocket/ee/jakarta/websocket/server/pathparam/WSClient.java $root=/home/jenkins/agent/workspace/jakartaee-tck_master/websocket-tck/src assertion_ids=WebSocket\:JAVADOC\:181 See assertion html documents.\nWebSocket\:SPEC\:WSC-4 See assertion html documents.\nWebSocket\:SPEC\:WSC-4.3-4 See assertion html documents.\nWebSocket\:SPEC\:WSC-4.3-3 See assertion html documents. classname=com.sun.ts.tests.websocket.ee.jakarta.websocket.server.pathparam.WSClient direction=forward finder=cts id=multipleStringParamsOnMessageTest_from_standalone keywords=all websocket javaee multipleStringParamsOnMessageTest standalone_vehicle forward service_eetest=yes testName=multipleStringParamsOnMessageTest testProps=\ webServerHost webServerPort ts_home ws_wait test_directory=com/sun/ts/tests/websocket/ee/jakarta/websocket/server/pathparam #-----environment----- JAVA_HOME=/opt/jdk1.8.0_191/jre JAVA_OPTIONS= LOCAL_CLASSES=/home/jenkins/agent/workspace/jakartaee-tck_master/websocket-tck/bin/xml/../../classes\:/home/jenkins/agent/workspace/jakartaee-tck_master/glassfish6/glassfish/modules/jakarta.websocket-api.jar\:/home/jenkins/agent/workspace/jakartaee-tck_master/glassfish6/glassfish/modules/jakarta.servlet-api.jar\:/home/jenkins/agent/workspace/jakartaee-tck_master/glassfish6/glassfish/modules/jakarta.enterprise.cdi-api.jar\:/home/jenkins/agent/workspace/jakartaee-tck_master/glassfish6/glassfish/modules/tyrus-websocket-core.jar\:/home/jenkins/agent/workspace/jakartaee-tck_master/glassfish6/glassfish/modules/tyrus-client.jar\:/home/jenkins/agent/workspace/jakartaee-tck_master/glassfish6/glassfish/modules/tyrus-core.jar\:/home/jenkins/agent/workspace/jakartaee-tck_master/glassfish6/glassfish/modules/tyrus-container-grizzly.jar\:/home/jenkins/agent/workspace/jakartaee-tck_master/glassfish6/glassfish/modules/glassfish-grizzly-extra-all.jar\:/home/jenkins/agent/workspace/jakartaee-tck_master/glassfish6/glassfish/modules/nucleus-grizzly-all.jar\:/home/jenkins/agent/workspace/jakartaee-tck_master/glassfish6/glassfish/modules/tyrus-server.jar\:/home/jenkins/agent/workspace/jakartaee-tck_master/glassfish6/glassfish/modules/tyrus-container-servlet.jar\:/home/jenkins/agent/workspace/jakartaee-tck_master/glassfish6/glassfish/modules/tyrus-container-grizzly-client.jar\:/home/jenkins/agent/workspace/jakartaee-tck_master/glassfish6/glassfish/modules/tyrus-spi.jar\:/home/jenkins/agent/workspace/jakartaee-tck_master/websocket-tck/bin/xml/../../lib/commons-httpclient-3.1.jar\:/home/jenkins/agent/workspace/jakartaee-tck_master/websocket-tck/bin/xml/../../lib/commons-logging-1.1.3.jar\:/home/jenkins/agent/workspace/jakartaee-tck_master/websocket-tck/bin/xml/../../lib/commons-codec-1.9.jar\:/home/jenkins/agent/workspace/jakartaee-tck_master/websocket-tck/bin/xml/../../lib/sigtest.jar\:/home/jenkins/agent/workspace/jakartaee-tck_master/websocket-tck/bin/xml/../../lib/javatest.jar\:/home/jenkins/agent/workspace/jakartaee-tck_master/websocket-tck/bin/xml/../../lib/tsharness.jar\:/home/jenkins/agent/workspace/jakartaee-tck_master/websocket-tck/bin/xml/../../lib/websockettck.jar SYSTEMROOT=${env.SystemRoot} TS_HOME=/home/jenkins/agent/workspace/jakartaee-tck_master/websocket-tck/bin/xml/../.. bin.dir=/home/jenkins/agent/workspace/jakartaee-tck_master/websocket-tck/bin/xml/../../bin command.testExecute=com.sun.ts.lib.harness.ExecTSTestCmd CLASSPATH\=${JAVA_HOME}/lib/rt.jar${pathsep}${LOCAL_CLASSES} HOME\="${user.home}" windir\=${windir} SYSTEMROOT\=${SYSTEMROOT} ${JAVA_HOME}/bin/java -Dbytecheck\=true -Djavax.net.ssl.keyStorePassword\=changeit -Djavax.net.ssl.keyStore\=${bin.dir}/certificates/clientcert.jks -Djavax.net.ssl.trustStore\=${web.home}/domains/domain1/config/cacerts.jks ${JAVA_OPTIONS} $testExecuteClass $testExecuteArgs harness.executeMode=2 harness.log.delayseconds=1 harness.log.port=2000 harness.log.traceflag=false harness.socket.retry.count=10 harness.temp.directory=${TS_HOME} pathsep=\: porting.ts.url.class.1=com.sun.ts.lib.implementation.sun.common.SunRIURL ts.home=/home/jenkins/agent/workspace/jakartaee-tck_master/websocket-tck/bin/xml/../.. ts_home=${ts.home} user.home=? web.home=/home/jenkins/agent/workspace/jakartaee-tck_master/glassfish6/glassfish webServerHost=localhost webServerPort=8080 windir=${env.windir} ws_wait=5 #-----testresult----- description=file\:/home/jenkins/agent/workspace/jakartaee-tck_master/websocket-tck/src/com/sun/ts/tests/websocket/ee/jakarta/websocket/server/pathparam/WSClient.java\#multipleStringParamsOnMessageTest_from_standalone end=Wed Aug 19 10\:53\:17 UTC 2020 environment=ts_unix execStatus=Failed. Test case throws exception\: [WebSocketCommonClient] multipleStringParamsOnMessageTest failed\! Check output for cause of failure. harnessLoaderMode=Classpath Loader harnessVariety=Full Bundle javatestOS=Linux 3.10.0-1062.12.1.el7.x86_64 (amd64) javatestVersion=5.0 script=com.sun.ts.lib.harness.TSScript sections=script_messages TestRun start=Wed Aug 19 10\:53\:15 UTC 2020 test=com/sun/ts/tests/websocket/ee/jakarta/websocket/server/pathparam/WSClient.java\#multipleStringParamsOnMessageTest_from_standalone timeoutSeconds=600 totalTime=1744 work=/home/jenkins/agent/workspace/jakartaee-tck_master/websocket-tckwork/websocket-tck/com/sun/ts/tests/websocket/ee/jakarta/websocket/server/pathparam #section:script_messages ----------messages:(0/0)---------- #section:TestRun ----------messages:(1/2832)---------- command: com.sun.ts.lib.harness.ExecTSTestCmd CLASSPATH=:/opt/jdk1.8.0_191/jre/lib/rt.jar:/home/jenkins/agent/workspace/jakartaee-tck_master/websocket-tck/bin/xml/../../classes:/home/jenkins/agent/workspace/jakartaee-tck_master/glassfish6/glassfish/modules/jakarta.websocket-api.jar:/home/jenkins/agent/workspace/jakartaee-tck_master/glassfish6/glassfish/modules/jakarta.servlet-api.jar:/home/jenkins/agent/workspace/jakartaee-tck_master/glassfish6/glassfish/modules/jakarta.enterprise.cdi-api.jar:/home/jenkins/agent/workspace/jakartaee-tck_master/glassfish6/glassfish/modules/tyrus-websocket-core.jar:/home/jenkins/agent/workspace/jakartaee-tck_master/glassfish6/glassfish/modules/tyrus-client.jar:/home/jenkins/agent/workspace/jakartaee-tck_master/glassfish6/glassfish/modules/tyrus-core.jar:/home/jenkins/agent/workspace/jakartaee-tck_master/glassfish6/glassfish/modules/tyrus-container-grizzly.jar:/home/jenkins/agent/workspace/jakartaee-tck_master/glassfish6/glassfish/modules/glassfish-grizzly-extra-all.jar:/home/jenkins/agent/workspace/jakartaee-tck_master/glassfish6/glassfish/modules/nucleus-grizzly-all.jar:/home/jenkins/agent/workspace/jakartaee-tck_master/glassfish6/glassfish/modules/tyrus-server.jar:/home/jenkins/agent/workspace/jakartaee-tck_master/glassfish6/glassfish/modules/tyrus-container-servlet.jar:/home/jenkins/agent/workspace/jakartaee-tck_master/glassfish6/glassfish/modules/tyrus-container-grizzly-client.jar:/home/jenkins/agent/workspace/jakartaee-tck_master/glassfish6/glassfish/modules/tyrus-spi.jar:/home/jenkins/agent/workspace/jakartaee-tck_master/websocket-tck/bin/xml/../../lib/commons-httpclient-3.1.jar:/home/jenkins/agent/workspace/jakartaee-tck_master/websocket-tck/bin/xml/../../lib/commons-logging-1.1.3.jar:/home/jenkins/agent/workspace/jakartaee-tck_master/websocket-tck/bin/xml/../../lib/commons-codec-1.9.jar:/home/jenkins/agent/workspace/jakartaee-tck_master/websocket-tck/bin/xml/../../lib/sigtest.jar:/home/jenkins/agent/workspace/jakartaee-tck_master/websocket-tck/bin/xml/../../lib/javatest.jar:/home/jenkins/agent/workspace/jakartaee-tck_master/websocket-tck/bin/xml/../../lib/tsharness.jar:/home/jenkins/agent/workspace/jakartaee-tck_master/websocket-tck/bin/xml/../../lib/websockettck.jar HOME=? windir= SYSTEMROOT= /opt/jdk1.8.0_191/jre/bin/java -Dbytecheck=true -Djavax.net.ssl.keyStorePassword=changeit -Djavax.net.ssl.keyStore=/home/jenkins/agent/workspace/jakartaee-tck_master/websocket-tck/bin/xml/../../bin/certificates/clientcert.jks -Djavax.net.ssl.trustStore=/home/jenkins/agent/workspace/jakartaee-tck_master/glassfish6/glassfish/domains/domain1/config/cacerts.jks com.sun.ts.tests.common.vehicle.VehicleClient -p /home/jenkins/agent/workspace/jakartaee-tck_master/websocket-tck/bin/xml/../../tmp/tstest.jte -t multipleStringParamsOnMessageTest -vehicle standalone ----------log:(146/11531)---------- ************************************************************ * props file set to "/tmp/?-cts-props.txt" ************************************************************ 08-19-2020 10:53:15: [WebSocketCommonClient] Test setup OK 08-19-2020 10:53:15: [WebSocketCommonClient] Connecting to ws://localhost:8080/ws_ee_jakarta_websocket_server_pathparam_web/param/param1 08-19-2020 10:53:15: ERROR: Root cause of Failure: Connection failed. 08-19-2020 10:53:15: ERROR: jakarta.websocket.DeploymentException: Connection failed. at org.glassfish.tyrus.container.grizzly.client.GrizzlyClientSocket._connect(GrizzlyClientSocket.java:413) at org.glassfish.tyrus.container.grizzly.client.GrizzlyClientSocket.access$000(GrizzlyClientSocket.java:81) at org.glassfish.tyrus.container.grizzly.client.GrizzlyClientSocket$1.call(GrizzlyClientSocket.java:212) at org.glassfish.tyrus.container.grizzly.client.GrizzlyClientSocket$1.call(GrizzlyClientSocket.java:208) at org.glassfish.tyrus.container.grizzly.client.GrizzlyClientSocket.connect(GrizzlyClientSocket.java:226) at org.glassfish.tyrus.container.grizzly.client.GrizzlyClientContainer.openClientSocket(GrizzlyClientContainer.java:72) at org.glassfish.tyrus.client.ClientManager$3$1.run(ClientManager.java:647) at org.glassfish.tyrus.client.ClientManager$3.run(ClientManager.java:696) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at org.glassfish.tyrus.client.ClientManager$SameThreadExecutorService.execute(ClientManager.java:849) at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:112) at org.glassfish.tyrus.client.ClientManager.connectToServer(ClientManager.java:493) at org.glassfish.tyrus.client.ClientManager.connectToServer(ClientManager.java:318) at com.sun.ts.tests.websocket.common.client.WebSocketTestCase.connectToServer(WebSocketTestCase.java:277) at com.sun.ts.tests.websocket.common.client.WebSocketTestCase.execute(WebSocketTestCase.java:183) at com.sun.ts.tests.websocket.common.client.WebSocketCommonClient.executeTestCase(WebSocketCommonClient.java:452) at com.sun.ts.tests.websocket.common.client.WebSocketCommonClient.invoke(WebSocketCommonClient.java:423) at com.sun.ts.tests.websocket.common.client.WebSocketCommonClient.invoke(WebSocketCommonClient.java:386) at com.sun.ts.tests.websocket.common.client.WebSocketCommonClient.invoke(WebSocketCommonClient.java:369) at com.sun.ts.tests.websocket.ee.jakarta.websocket.server.pathparam.WSClient.multipleStringParams(WSClient.java:391) at com.sun.ts.tests.websocket.ee.jakarta.websocket.server.pathparam.WSClient.multipleStringParamsOnMessageTest(WSClient.java:52) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at com.sun.ts.lib.harness.EETest.run(EETest.java:596) at com.sun.ts.lib.harness.ServiceEETest.run(ServiceEETest.java:115) at com.sun.ts.tests.common.vehicle.EmptyVehicleRunner.run(EmptyVehicleRunner.java:40) at com.sun.ts.lib.harness.ServiceEETest.run(ServiceEETest.java:105) at com.sun.ts.lib.harness.EETest.getPropsReady(EETest.java:486) at com.sun.ts.lib.harness.ServiceEETest.run(ServiceEETest.java:209) at com.sun.ts.lib.harness.EETest.run(EETest.java:285) at com.sun.ts.tests.common.vehicle.VehicleClient.main(VehicleClient.java:38) Caused by: java.net.ConnectException: Connection refused at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method) at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717) at org.glassfish.grizzly.nio.transport.TCPNIOConnectorHandler.onConnectedAsync(TCPNIOConnectorHandler.java:175) at org.glassfish.grizzly.nio.transport.TCPNIOConnectorHandler$1.connected(TCPNIOConnectorHandler.java:132) at org.glassfish.grizzly.nio.transport.TCPNIOConnection.onConnect(TCPNIOConnection.java:220) at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:502) at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:82) at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:83) at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.executeIoEvent(WorkerThreadIOStrategy.java:73) at org.glassfish.grizzly.strategies.AbstractIOStrategy.executeIoEvent(AbstractIOStrategy.java:66) at org.glassfish.grizzly.nio.SelectorRunner.iterateKeyEvents(SelectorRunner.java:381) at org.glassfish.grizzly.nio.SelectorRunner.iterateKeys(SelectorRunner.java:353) at org.glassfish.grizzly.nio.SelectorRunner.doSelect(SelectorRunner.java:319) at org.glassfish.grizzly.nio.SelectorRunner.run(SelectorRunner.java:248) at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:535) at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:515) at java.lang.Thread.run(Thread.java:748) 08-19-2020 10:53:15: [WebSocketCommonClient] Test cleanup OK 08-19-2020 10:53:15: ERROR: Test case throws exception: [WebSocketCommonClient] multipleStringParamsOnMessageTest failed! Check output for cause of failure. 08-19-2020 10:53:15: ERROR: Exception at: 08-19-2020 10:53:15: ERROR: com.sun.ts.tests.common.webclient.TestFailureException: [FATAL] Unexpected failure during test execution. class StringClientEndpoint extends Endpoint implements MessageHandler.Whole<String> { public void onOpen(Session session, EndpointConfig config) { session.addMessageHandler(this); RemoteEndpoint.Basic endpoint = session.getBasicRemote(); try { endpoint.sendText("MESSAGE"); } catch (IOException e) { throw new RuntimeException(e); } } public void onMessage(String message) { System.out.println(message); messageLatch.countDown() } }; CountDownLatch messageLatch; public void test() { WebSocketContainer clientContainer = ContainerProvider.getWebSocketContainer(); messageLatch = new CountDownLatch(1); Session session = clientContainer.connectToServer(StringClientEndpoint.class, ClientEndpointConfig.Builder.create().config(new jakarta.websocket.ClientEndpointConfig$Builder$1()).build(), new URI("ws://localhost:8080/ws_ee_jakarta_websocket_server_pathparam_web/param/param1")); messageLatch.await(5, TimeUnit.SECONDS); } Connection failed. at com.sun.ts.tests.websocket.common.client.WebSocketTestCase.execute(WebSocketTestCase.java:196) at com.sun.ts.tests.websocket.common.client.WebSocketCommonClient.executeTestCase(WebSocketCommonClient.java:452) at com.sun.ts.tests.websocket.common.client.WebSocketCommonClient.invoke(WebSocketCommonClient.java:423) at com.sun.ts.tests.websocket.common.client.WebSocketCommonClient.invoke(WebSocketCommonClient.java:386) at com.sun.ts.tests.websocket.common.client.WebSocketCommonClient.invoke(WebSocketCommonClient.java:369) at com.sun.ts.tests.websocket.ee.jakarta.websocket.server.pathparam.WSClient.multipleStringParams(WSClient.java:391) at com.sun.ts.tests.websocket.ee.jakarta.websocket.server.pathparam.WSClient.multipleStringParamsOnMessageTest(WSClient.java:52) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at com.sun.ts.lib.harness.EETest.run(EETest.java:596) at com.sun.ts.lib.harness.ServiceEETest.run(ServiceEETest.java:115) at com.sun.ts.tests.common.vehicle.EmptyVehicleRunner.run(EmptyVehicleRunner.java:40) at com.sun.ts.lib.harness.ServiceEETest.run(ServiceEETest.java:105) at com.sun.ts.lib.harness.EETest.getPropsReady(EETest.java:486) at com.sun.ts.lib.harness.ServiceEETest.run(ServiceEETest.java:209) at com.sun.ts.lib.harness.EETest.run(EETest.java:285) at com.sun.ts.tests.common.vehicle.VehicleClient.main(VehicleClient.java:38) Caused by: jakarta.websocket.DeploymentException: Connection failed. at org.glassfish.tyrus.container.grizzly.client.GrizzlyClientSocket._connect(GrizzlyClientSocket.java:413) at org.glassfish.tyrus.container.grizzly.client.GrizzlyClientSocket.access$000(GrizzlyClientSocket.java:81) at org.glassfish.tyrus.container.grizzly.client.GrizzlyClientSocket$1.call(GrizzlyClientSocket.java:212) at org.glassfish.tyrus.container.grizzly.client.GrizzlyClientSocket$1.call(GrizzlyClientSocket.java:208) at org.glassfish.tyrus.container.grizzly.client.GrizzlyClientSocket.connect(GrizzlyClientSocket.java:226) at org.glassfish.tyrus.container.grizzly.client.GrizzlyClientContainer.openClientSocket(GrizzlyClientContainer.java:72) at org.glassfish.tyrus.client.ClientManager$3$1.run(ClientManager.java:647) at org.glassfish.tyrus.client.ClientManager$3.run(ClientManager.java:696) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at org.glassfish.tyrus.client.ClientManager$SameThreadExecutorService.execute(ClientManager.java:849) at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:112) at org.glassfish.tyrus.client.ClientManager.connectToServer(ClientManager.java:493) at org.glassfish.tyrus.client.ClientManager.connectToServer(ClientManager.java:318) at com.sun.ts.tests.websocket.common.client.WebSocketTestCase.connectToServer(WebSocketTestCase.java:277) at com.sun.ts.tests.websocket.common.client.WebSocketTestCase.execute(WebSocketTestCase.java:183) ... 18 more Caused by: java.net.ConnectException: Connection refused at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method) at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717) at org.glassfish.grizzly.nio.transport.TCPNIOConnectorHandler.onConnectedAsync(TCPNIOConnectorHandler.java:175) at org.glassfish.grizzly.nio.transport.TCPNIOConnectorHandler$1.connected(TCPNIOConnectorHandler.java:132) at org.glassfish.grizzly.nio.transport.TCPNIOConnection.onConnect(TCPNIOConnection.java:220) at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:502) at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:82) at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:83) at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.executeIoEvent(WorkerThreadIOStrategy.java:73) at org.glassfish.grizzly.strategies.AbstractIOStrategy.executeIoEvent(AbstractIOStrategy.java:66) at org.glassfish.grizzly.nio.SelectorRunner.iterateKeyEvents(SelectorRunner.java:381) at org.glassfish.grizzly.nio.SelectorRunner.iterateKeys(SelectorRunner.java:353) at org.glassfish.grizzly.nio.SelectorRunner.doSelect(SelectorRunner.java:319) at org.glassfish.grizzly.nio.SelectorRunner.run(SelectorRunner.java:248) at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:535) at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:515) at java.lang.Thread.run(Thread.java:748) 08-19-2020 10:53:15: [WebSocketCommonClient] Test cleanup OK STATUS:Failed.Test case throws exception: [WebSocketCommonClient] multipleStringParamsOnMessageTest failed! Check output for cause of failure. result: Failed. Test case throws exception: [WebSocketCommonClient] multipleStringParamsOnMessageTest failed! Check output for cause of failure. test result: Failed. Test case throws exception: [WebSocketCommonClient] multipleStringParamsOnMessageTest failed! Check output for cause of failure.