Spark on Kubernetes requires the presence of the kube-dns add-on properly configured. The executors connect to the driver through a headless Kubernetes service using the DNS name of the service. Can you check if you have the add-on installed in your cluster? This issue https://github.com/apache-spark-on-k8s/spark/issues/558 might help.
On Sun, Mar 11, 2018 at 5:01 PM, purna pradeep <purna2prad...@gmail.com> wrote: > Getting below errors when I’m trying to run spark-submit on k8 cluster > > > *Error 1*:This looks like a warning it doesn’t interrupt the app running > inside executor pod but keeps on getting this warning > > > *2018-03-09 11:15:21 WARN WatchConnectionManager:192 - Exec Failure* > * java.io.EOFException* > * at okio.RealBufferedSource.require(RealBufferedSource.java:60)* > * at > okio.RealBufferedSource.readByte(RealBufferedSource.java:73)* > * at okhttp3.internal.ws > <http://okhttp3.internal.ws>.WebSocketReader.readHeader(WebSocketReader.java:113)* > * at okhttp3.internal.ws > <http://okhttp3.internal.ws>.WebSocketReader.processNextFrame(WebSocketReader.java:97)* > * at okhttp3.internal.ws > <http://okhttp3.internal.ws>.RealWebSocket.loopReader(RealWebSocket.java:262)* > * at okhttp3.internal.ws > <http://okhttp3.internal.ws>.RealWebSocket$2.onResponse(RealWebSocket.java:201)* > * at okhttp3.RealCall$AsyncCall.execute(RealCall.java:141)* > * at okhttp3.internal.NamedRunnable.run(NamedRunnable.java:32)* > * at > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)* > * at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)* > * at java.lang.Thread.run(Thread.java:748)* > > > > *Error2:* This is intermittent error which is failing the executor pod > to run > > > *org.apache.spark.SparkException: External scheduler cannot be > instantiated* > * at > org.apache.spark.SparkContext$.org$apache$spark$SparkContext$$createTaskScheduler(SparkContext.scala:2747)* > * at org.apache.spark.SparkContext.<init>(SparkContext.scala:492)* > * at > org.apache.spark.SparkContext$.getOrCreate(SparkContext.scala:2486)* > * at > org.apache.spark.sql.SparkSession$Builder$$anonfun$7.apply(SparkSession.scala:930)* > * at > org.apache.spark.sql.SparkSession$Builder$$anonfun$7.apply(SparkSession.scala:921)* > * at scala.Option.getOrElse(Option.scala:121)* > * at > org.apache.spark.sql.SparkSession$Builder.getOrCreate(SparkSession.scala:921)* > * at > com.capitalone.quantum.spark.core.QuantumSession$.initialize(QuantumSession.scala:62)* > * at > com.capitalone.quantum.spark.core.QuantumSession$.getSparkSession(QuantumSession.scala:80)* > * at > com.capitalone.quantum.workflow.WorkflowApp$.getSession(WorkflowApp.scala:116)* > * at > com.capitalone.quantum.workflow.WorkflowApp$.main(WorkflowApp.scala:90)* > * at > com.capitalone.quantum.workflow.WorkflowApp.main(WorkflowApp.scala)* > * Caused by: io.fabric8.kubernetes.client.KubernetesClientException: > Operation: [get] for kind: [Pod] with name: > [myapp-ef79db3d9f4831bf85bda14145fdf113-driver-driver] in namespace: > [default] failed.* > * at > io.fabric8.kubernetes.client.KubernetesClientException.launderThrowable(KubernetesClientException.java:62)* > * at > io.fabric8.kubernetes.client.KubernetesClientException.launderThrowable(KubernetesClientException.java:71)* > * at > io.fabric8.kubernetes.client.dsl.base.BaseOperation.getMandatory(BaseOperation.java:228)* > * at > io.fabric8.kubernetes.client.dsl.base.BaseOperation.get(BaseOperation.java:184)* > * at > org.apache.spark.scheduler.cluster.k8s.KubernetesClusterSchedulerBackend.<init>(KubernetesClusterSchedulerBackend.scala:70)* > * at > org.apache.spark.scheduler.cluster.k8s.KubernetesClusterManager.createSchedulerBackend(KubernetesClusterManager.scala:120)* > * at > org.apache.spark.SparkContext$.org$apache$spark$SparkContext$$createTaskScheduler(SparkContext.scala:2741)* > * ... 11 more* > * Caused by: java.net.UnknownHostException: kubernetes.default.svc: Try > again* > * at java.net.Inet4AddressImpl.lookupAllHostAddr(Native Method)* > * at java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:928)* > * at > java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1323)* > * at java.net.InetAddress.getAllByName0(InetAddress.java:1276)* > * at java.net.InetAddress.getAllByName(InetAddress.java:1192)* > * at java.net.InetAddress.getAllByName(InetAddress.java:1126)* > * at okhttp3.Dns$1.lookup(Dns.java:39)* > * at > okhttp3.internal.connection.RouteSelector.resetNextInetSocketAddress(RouteSelector.java:171)* > * at > okhttp3.internal.connection.RouteSelector.nextProxy(RouteSelector.java:137)* > * at > okhttp3.internal.connection.RouteSelector.next(RouteSelector.java:82)* > * at > okhttp3.internal.connection.StreamAllocation.findConnection(StreamAllocation.java:171)* > * at > okhttp3.internal.connection.StreamAllocation.findHealthyConnection(StreamAllocation.java:121)* > * at > okhttp3.internal.connection.StreamAllocation.newStream(StreamAllocation.java:100)* > * at > okhttp3.internal.connection.ConnectInterceptor.intercept(ConnectInterceptor.java:42)* > * at > okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)* > * at > okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67)* > * at > okhttp3.internal.cache.CacheInterceptor.intercept(CacheInterceptor.java:93)* > * at > okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)* > * at > okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67)* > * at > okhttp3.internal.http.BridgeInterceptor.intercept(BridgeInterceptor.java:93)* > * at > okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)* > * at > okhttp3.internal.http.RetryAndFollowUpInterceptor.intercept(RetryAndFollowUpInterceptor.java:120)* > * at > okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)* > * at > okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67)* > * at > io.fabric8.kubernetes.client.utils.HttpClientUtils$2.intercept(HttpClientUtils.java:93)* > * at > okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)* > * at > okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67)* > * at > okhttp3.RealCall.getResponseWithInterceptorChain(RealCall.java:185)* > * at okhttp3.RealCall.execute(RealCall.java:69)* > * at > io.fabric8.kubernetes.client.dsl.base.OperationSupport.handleResponse(OperationSupport.java:377)* > * at > io.fabric8.kubernetes.client.dsl.base.OperationSupport.handleResponse(OperationSupport.java:343)* > * at > io.fabric8.kubernetes.client.dsl.base.OperationSupport.handleGet(OperationSupport.java:312)* > * at > io.fabric8.kubernetes.client.dsl.base.OperationSupport.handleGet(OperationSupport.java:295)* > * at > io.fabric8.kubernetes.client.dsl.base.BaseOperation.handleGet(BaseOperation.java:783)* > * at > io.fabric8.kubernetes.client.dsl.base.BaseOperation.getMandatory(BaseOperation.java:217)* > * ... 15 more* > * 2018-03-09 15:00:39 INFO AbstractConnector:318 - Stopped > Spark@5f59185e{HTTP/1.1,[http/1.1]}{0.0.0.0:4040 <http://0.0.0.0:4040/>}* > * 2018-03-09 15:00:39 INFO SparkUI:54 - Stopped Spark web UI > at http://myapp-ef79db3d9f4831bf85bda14145fdf113-driver-svc.default.svc:4040 > <http://myapp-ef79db3d9f4831bf85bda14145fdf113-driver-svc.default.svc:4040/>* > * 2018-03-09 15:00:39 INFO MapOutputTrackerMasterEndpoint:54 - > MapOutputTrackerMasterEndpoint stopped!* > * 2018-03-09 15:00:39 INFO MemoryStore:54 - MemoryStore cleared* > * 2018-03-09 15:00:39 INFO BlockManager:54 - BlockManager stopped* > * 2018-03-09 15:00:39 INFO BlockManagerMaster:54 - BlockManagerMaster > stopped* > * 2018-03-09 15:00:39 WARN MetricsSystem:66 - Stopping a MetricsSystem > that is not running* > * 2018-03-09 15:00:39 INFO > OutputCommitCoordinator$OutputCommitCoordinatorEndpoint:54 - > OutputCommitCoordinator stopped!* > * 2018-03-09 15:00:39 INFO SparkContext:54 - Successfully stopped > SparkContext* > * Exception in thread "main" org.apache.spark.SparkException: External > scheduler cannot be instantiated* > * at > org.apache.spark.SparkContext$.org$apache$spark$SparkContext$$createTaskScheduler(SparkContext.scala:2747)* > * at org.apache.spark.SparkContext.<init>(SparkContext.scala:492)* > * at > org.apache.spark.SparkContext$.getOrCreate(SparkContext.scala:2486)* > * at > org.apache.spark.sql.SparkSession$Builder$$anonfun$7.apply(SparkSession.scala:930)* > * at > org.apache.spark.sql.SparkSession$Builder$$anonfun$7.apply(SparkSession.scala:921)* > * at scala.Option.getOrElse(Option.scala:121)* > * at > org.apache.spark.sql.SparkSession$Builder.getOrCreate(SparkSession.scala:921)* > * at > com.capitalone.quantum.spark.core.QuantumSession$.initialize(QuantumSession.scala:62)* > * at > com.capitalone.quantum.spark.core.QuantumSession$.getSparkSession(QuantumSession.scala:80)* > * at > com.capitalone.quantum.workflow.WorkflowApp$.getSession(WorkflowApp.scala:116)* > * at > com.capitalone.quantum.workflow.WorkflowApp$.main(WorkflowApp.scala:90)* > * at > com.capitalone.quantum.workflow.WorkflowApp.main(WorkflowApp.scala)* > * Caused by: io.fabric8.kubernetes.client.KubernetesClientException: > Operation: [get] for kind: [Pod] with name: > [myapp-ef79db3d9f4831bf85bda14145fdf113-driver] in namespace: [default] > failed.* > * at > io.fabric8.kubernetes.client.KubernetesClientException.launderThrowable(KubernetesClientException.java:62)* > * at > io.fabric8.kubernetes.client.KubernetesClientException.launderThrowable(KubernetesClientException.java:71)* > * at > io.fabric8.kubernetes.client.dsl.base.BaseOperation.getMandatory(BaseOperation.java:228)* > * at > io.fabric8.kubernetes.client.dsl.base.BaseOperation.get(BaseOperation.java:184)* > * at > org.apache.spark.scheduler.cluster.k8s.KubernetesClusterSchedulerBackend.<init>(KubernetesClusterSchedulerBackend.scala:70)* > * at > org.apache.spark.scheduler.cluster.k8s.KubernetesClusterManager.createSchedulerBackend(KubernetesClusterManager.scala:120)* > * at > org.apache.spark.SparkContext$.org$apache$spark$SparkContext$$createTaskScheduler(SparkContext.scala:2741)* > * ... 11 more* > * Caused by: java.net.UnknownHostException: kubernetes.default.svc: Try > again* > * at java.net.Inet4AddressImpl.lookupAllHostAddr(Native Method)* > * at java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:928)* > * at > java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1323)* > * at java.net.InetAddress.getAllByName0(InetAddress.java:1276)* > * at java.net.InetAddress.getAllByName(InetAddress.java:1192)* > * at java.net.InetAddress.getAllByName(InetAddress.java:1126)* > * at okhttp3.Dns$1.lookup(Dns.java:39)* > * at > okhttp3.internal.connection.RouteSelector.resetNextInetSocketAddress(RouteSelector.java:171)* > * at > okhttp3.internal.connection.RouteSelector.nextProxy(RouteSelector.java:137)* > * at > okhttp3.internal.connection.RouteSelector.next(RouteSelector.java:82)* > * at > okhttp3.internal.connection.StreamAllocation.findConnection(StreamAllocation.java:171)* > * at > okhttp3.internal.connection.StreamAllocation.findHealthyConnection(StreamAllocation.java:121)* > * at > okhttp3.internal.connection.StreamAllocation.newStream(StreamAllocation.java:100)* > * at > okhttp3.internal.connection.ConnectInterceptor.intercept(ConnectInterceptor.java:42)* > * at > okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)* > * at > okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67)* > * at > okhttp3.internal.cache.CacheInterceptor.intercept(CacheInterceptor.java:93)* > * at > okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)* > * at > okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67)* > * at > okhttp3.internal.http.BridgeInterceptor.intercept(BridgeInterceptor.java:93)* > * at > okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)* > * at > okhttp3.internal.http.RetryAndFollowUpInterceptor.intercept(RetryAndFollowUpInterceptor.java:120)* > * at > okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)* > * at > okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67)* > * at > io.fabric8.kubernetes.client.utils.HttpClientUtils$2.intercept(HttpClientUtils.java:93)* > * at > okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)* > * at > okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67)* > * at > okhttp3.RealCall.getResponseWithInterceptorChain(RealCall.java:185)* > * at okhttp3.RealCall.execute(RealCall.java:69)* > * at > io.fabric8.kubernetes.client.dsl.base.OperationSupport.handleResponse(OperationSupport.java:377)* > * at > io.fabric8.kubernetes.client.dsl.base.OperationSupport.handleResponse(OperationSupport.java:343)* > * at > io.fabric8.kubernetes.client.dsl.base.OperationSupport.handleGet(OperationSupport.java:312)* > * at > io.fabric8.kubernetes.client.dsl.base.OperationSupport.handleGet(OperationSupport.java:295)* > * at > io.fabric8.kubernetes.client.dsl.base.BaseOperation.handleGet(BaseOperation.java:783)* > * at > io.fabric8.kubernetes.client.dsl.base.BaseOperation.getMandatory(BaseOperation.java:217)* > * ... 15 more* > * 2018-03-09 15:00:39 INFO ShutdownHookManager:54 - Shutdown hook > called* > * 2018-03-09 15:00:39 INFO ShutdownHookManager:54 - Deleting directory > /tmp/spark-5bd85c96-d689-4c53-a0b3-1eadd32357cb* > > > Note:Able to run the application successfully but spark-submit run fails > with above error2 very frequently. > >
