Question

我遇到以下错误

org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannel $ AnnotatedConnectException：连接被拒绝：localhost / 127.0.0.1：8081

，同时尝试使用Flink流数据。我的代码在一个月前运行良好，现在出现此错误。在通过访问http://localhost:8081上的Flink Web Dashboard来监视流的进度之前，现在我的浏览器返回一个错误，表明它无法访问服务器“ localhost”。可能是什么问题呢？先感谢您。

错误消息的完整输出：

org.apache.flink.client.program.ProgramInvocationException：无法检索执行结果。（工作编号：cfa44a8fd6a62f51ef8c0f956d55ee56）在org.apache.flink.client.program.rest.RestClusterClient.submitJob（RestClusterClient.java:260）在org.apache.flink.client.program.ClusterClient.run（ClusterClient.java:486）在org.apache.flink.streaming.api.environment.StreamContextEnvironment.execute（StreamContextEnvironment.java:66）在examples.WaterLevelKafka.main（WaterLevelKafka.java:124）在sun.reflect.NativeMethodAccessorImpl.invoke0（本机方法）处在sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:62）在sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）在java.lang.reflect.Method.invoke（Method.java:498）在org.apache.flink.client.program.PackagedProgram.callMainMethod（PackagedProgram.java:529）在org.apache.flink.client.program.PackagedProgram.invokeInteractiveModeForExecution（PackagedProgram.java:421）在org.apache.flink.client.program.ClusterClient.run（ClusterClient.java:426）在org.apache.flink.client.cli.CliFrontend.executeProgram（CliFrontend.java:804）在org.apache.flink.client.cli.CliFrontend.runProgram（CliFrontend.java:280）在org.apache.flink.client.cli.CliFrontend.run（CliFrontend.java:215）在org.apache.flink.client.cli.CliFrontend.parseParameters（CliFrontend.java:1044）在org.apache.flink.client.cli.CliFrontend.lambda $ main $ 11（CliFrontend.java:1120）在java.security.AccessController.doPrivileged（本机方法）在javax.security.auth.Subject.doAs（Subject.java:422）在org.apache.hadoop.security.UserGroupInformation.doAs（UserGroupInformation.java:1836）在org.apache.flink.runtime.security.HadoopSecurityContext.runSecured（HadoopSecurityContext.java:41）在org.apache.flink.client.cli.CliFrontend.main（CliFrontend.java:1120）原因：org.apache.flink.runtime.client.JobSubmissionException：无法提交JobGraph。在org.apache.flink.client.program.rest.RestClusterClient.lambda $ submitJob $ 8（RestClusterClient.java:379）在java.util.concurrent.CompletableFuture.uniExceptionally（CompletableFuture.java:870）在java.util.concurrent.CompletableFuture $ UniExceptionally.tryFire（CompletableFuture.java:852）在java.util.concurrent.CompletableFuture.postComplete（CompletableFuture.java:474）在java.util.concurrent.CompletableFuture.completeExceptionally（CompletableFuture.java:1977）在org.apache.flink.runtime.concurrent.FutureUtils.lambda $ retryOperationWithDelay $ 5（FutureUtils.java:213）中在java.util.concurrent.CompletableFuture.uniWhenComplete（CompletableFuture.java:760）在java.util.concurrent.CompletableFuture $ UniWhenComplete.tryFire（CompletableFuture.java:736）在java.util.concurrent.CompletableFuture.postComplete（CompletableFuture.java:474）在java.util.concurrent.CompletableFuture.completeExceptionally（CompletableFuture.java:1977）在org.apache.flink.runtime.rest.RestClient.lambda $ submitRequest $ 1（RestClient.java:276）在org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultPromise.notifyListener0（DefaultPromise.java:511）在org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultPromise.notifyListeners0（DefaultPromise.java:504）在org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultPromise.notifyListenersNow（DefaultPromise.java:483）在org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultPromise.notifyListeners（DefaultPromise.java:424）在org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultPromise.tryFailure（DefaultPromise.java:121）在org.apache.flink.shaded.netty4.io.netty.channel.nio.AbstractNioChannel $ AbstractNioUnsafe.fulfillConnectPromise（AbstractNioChannel.java:327）在org.apache.flink.shaded.netty4.io.netty.channel.nio.AbstractNioChannel $ AbstractNioUnsafe.finishConnect（AbstractNioChannel.java:343）在org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKey（NioEventLoop.java:633）在org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized（NioEventLoop.java:580）在org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKeys（NioEventLoop.java:497）在org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.run（NioEventLoop.java:459）在org.apache.flink.shaded.netty4.io.netty.util.concurrent.SingleThreadEventExecutor $ 5.run（SingleThreadEventExecutor.java:884）在org.apache.flink.shaded.netty4.io.netty.util.concurrent.FastThreadLocalRunnable.run（FastThreadLocalRunnable.java:30）在java.lang.Thread.run（Thread.java:745）原因：java.util.concurrent.CompletionException：org.apache.flink.runtime.concurrent.FutureUtils $ RetryException：无法完成该操作。重试次数已用尽。在java.util.concurrent.CompletableFuture.encodeRelay（CompletableFuture.java:326）在java.util.concurrent.CompletableFuture.completeRelay（CompletableFuture.java:338）在java.util.concurrent.CompletableFuture.uniRelay（CompletableFuture.java:911）在java.util.concurrent.CompletableFuture $ UniRelay.tryFire（CompletableFuture.java:899） ...另外22个原因：org.apache.flink.runtime.concurrent.FutureUtils $ RetryException：无法完成该操作。重试次数已用尽。 ...另外20个引起原因：java.util.concurrent.CompletionException：org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannel $ AnnotatedConnectException：连接被拒绝：localhost / 127.0.0.1：8081 在java.util.concurrent.CompletableFuture.encodeThrowable（CompletableFuture.java:292）在java.util.concurrent.CompletableFuture.completeThrowable（CompletableFuture.java:308）在java.util.concurrent.CompletableFuture.uniCompose（CompletableFuture.java:943）在java.util.concurrent.CompletableFuture $ UniCompose.tryFire（CompletableFuture.java:926） ...另外17个造成原因：org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannel $ AnnotatedConnectException：连接被拒绝：localhost / 127.0.0.1：8081 在sun.nio.ch.SocketChannelImpl.checkConnect（本机方法）在sun.nio.ch.SocketChannelImpl.finishConnect（SocketChannelImpl.java:717）在org.apache.flink.shaded.netty4.io.netty.channel.socket.nio.NioSocketChannel.doFinishConnect（NioSocketChannel.java:325）在org.apache.flink.shaded.netty4.io.netty.channel.nio.AbstractNioChannel $ AbstractNioUnsafe.finishConnect（AbstractNioChannel.java:340） ...另外7个引起原因：java.net.ConnectException：连接被拒绝 ...还有11个

Answer 1

Apache flink集群似乎未运行。

您只需要启动它即可：

./bin/start-cluster.sh  # Start Flink

Flink连接被拒绝：localhost / 127.0.0.1：8081

1 个答案: