Hey All,
We recently updated to Flink 1.15.1. We deploy stream cluster in Application
mode in Native K8S.(Deployed on Amazon EKS). The cluster is configured with
Kubernetes HA Service, Minimum 3 replicas of Job manager and pod-template which
is configured with topologySpreadConstraints to enable distribution across
different availability zones.
HA storage directory is on S3.
The cluster is deployed and running properly, however, after a while we noticed
the following exception in Job manager instance(the log file is enclosed)
2022-09-04T02:05:33,097][Error] {} [i.f.k.c.e.l.LeaderElector]: Exception
occurred while acquiring lock 'ConfigMapLock: dev-0-flink-jobs -
data-agg-events-insertion-cluster-config-map
(b6da2ae2-ad2b-471c-801e-ea460a348fab)'
io.fabric8.kubernetes.client.KubernetesClientException: Operation: [get] for
kind: [ConfigMap] with name: [data-agg-events-insertion-cluster-config-map]
in namespace: [dev-0-flink-jobs] failed.
Caused by: java.io.FileNotFoundException: /opt/flink/.kube/config (No such file
or directory)
at java.io.FileInputStream.open0(Native Method) ~[?:?]
at java.io.FileInputStream.open(Unknown Source) ~[?:?]
at java.io.FileInputStream.<init>(Unknown Source) ~[?:?]
at
org.apache.flink.kubernetes.shaded.com.fasterxml.jackson.dataformat.yaml.YAMLFactory.createParser(YAMLFactory.java:354)
~[flink-dist-1.15.1.jar:1.15.1]
at
org.apache.flink.kubernetes.shaded.com.fasterxml.jackson.dataformat.yaml.YAMLFactory.createParser(YAMLFactory.java:15)
~[flink-dist-1.15.1.jar:1.15.1]
at
org.apache.flink.kubernetes.shaded.com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:3494)
~[flink-dist-1.15.1.jar:1.15.1]
at
io.fabric8.kubernetes.client.internal.KubeConfigUtils.parseConfig(KubeConfigUtils.java:42)
~[flink-dist-1.15.1.jar:1.15.1]
at
io.fabric8.kubernetes.client.utils.TokenRefreshInterceptor.intercept(TokenRefreshInterceptor.java:44)
~[flink-dist-1.15.1.jar:1.15.1]
at
org.apache.flink.kubernetes.shaded.okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:142)
~[flink-dist-1.15.1.jar:1.15.1]
at
org.apache.flink.kubernetes.shaded.okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:117)
~[flink-dist-1.15.1.jar:1.15.1]
at
io.fabric8.kubernetes.client.utils.ImpersonatorInterceptor.intercept(ImpersonatorInterceptor.java:68)
~[flink-dist-1.15.1.jar:1.15.1]
at
org.apache.flink.kubernetes.shaded.okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:142)
~[flink-dist-1.15.1.jar:1.15.1]
at
org.apache.flink.kubernetes.shaded.okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:117)
~[flink-dist-1.15.1.jar:1.15.1]
at
io.fabric8.kubernetes.client.utils.HttpClientUtils.lambda$createApplicableInterceptors$6(HttpClientUtils.java:290)
~[flink-dist-1.15.1.jar:1.15.1]
at
org.apache.flink.kubernetes.shaded.okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:142)
~[flink-dist-1.15.1.jar:1.15.1]
at
org.apache.flink.kubernetes.shaded.okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:117)
~[flink-dist-1.15.1.jar:1.15.1]
at
org.apache.flink.kubernetes.shaded.okhttp3.RealCall.getResponseWithInterceptorChain(RealCall.java:229)
~[flink-dist-1.15.1.jar:1.15.1]
at
org.apache.flink.kubernetes.shaded.okhttp3.RealCall.execute(RealCall.java:81)
~[flink-dist-1.15.1.jar:1.15.1]
at
io.fabric8.kubernetes.client.dsl.base.OperationSupport.retryWithExponentialBackoff(OperationSupport.java:585)
~[flink-dist-1.15.1.jar:1.15.1]
at
io.fabric8.kubernetes.client.dsl.base.OperationSupport.handleResponse(OperationSupport.java:558)
~[flink-dist-1.15.1.jar:1.15.1]
at
io.fabric8.kubernetes.client.dsl.base.OperationSupport.handleResponse(OperationSupport.java:521)
~[flink-dist-1.15.1.jar:1.15.1]
at
io.fabric8.kubernetes.client.dsl.base.OperationSupport.handleGet(OperationSupport.java:488)
~[flink-dist-1.15.1.jar:1.15.1]
at
io.fabric8.kubernetes.client.dsl.base.OperationSupport.handleGet(OperationSupport.java:470)
~[flink-dist-1.15.1.jar:1.15.1]
at
io.fabric8.kubernetes.client.dsl.base.BaseOperation.handleGet(BaseOperation.java:830)
~[flink-dist-1.15.1.jar:1.15.1]
at
io.fabric8.kubernetes.client.dsl.base.BaseOperation.getMandatory(BaseOperation.java:200)
~[flink-dist-1.15.1.jar:1.15.1]
... 12 more
Why is Kube/config needed in Native K8s, should not service account be checked
instead?
Are we missing something?
Thanks,
Tamir.
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[2022-09-01T19:25:21,709][Info] {} [o.a.f.r.l.DefaultLeaderElectionService]:
Starting DefaultLeaderElectionService with
org.apache.flink.runtime.leaderelection.MultipleComponentLeaderElectionDriverAdapter@641cea11.
[2022-09-01T19:25:21,710][Info] {} [o.a.f.r.j.MiniDispatcherRestEndpoint]: Web
frontend listening at http://10.227.193.49:8081.
[2022-09-01T19:25:21,797][Info] {} [o.a.f.r.l.DefaultLeaderElectionService]:
Starting DefaultLeaderElectionService with
org.apache.flink.runtime.leaderelection.MultipleComponentLeaderElectionDriverAdapter@633cad4d.
[2022-09-01T19:25:21,798][Info] {} [o.a.f.r.r.ResourceManagerServiceImpl]:
Starting resource manager service.
[2022-09-01T19:25:21,798][Info] {} [o.a.f.r.l.DefaultLeaderElectionService]:
Starting DefaultLeaderElectionService with
org.apache.flink.runtime.leaderelection.MultipleComponentLeaderElectionDriverAdapter@15c3585.
[2022-09-01T19:25:21,800][Info] {}
[o.a.f.k.k.r.KubernetesConfigMapSharedInformer]: Starting to watch for
dev-0-flink-jobs/data-agg-events-insertion-cluster-config-map, watching
id:cd466ac1-ba9b-4c62-a65b-4be4d7f9b4b6
[2022-09-01T19:25:21,800][Info] {} [o.a.f.r.l.DefaultLeaderRetrievalService]:
Starting DefaultLeaderRetrievalService with
KubernetesLeaderRetrievalDriver{configMapName='data-agg-events-insertion-cluster-config-map'}.
[2022-09-01T19:25:21,800][Info] {}
[o.a.f.k.k.r.KubernetesConfigMapSharedInformer]: Starting to watch for
dev-0-flink-jobs/data-agg-events-insertion-cluster-config-map, watching
id:b977a6bd-f706-4055-95d4-e71604bbe657
[2022-09-01T19:25:21,800][Info] {} [o.a.f.r.l.DefaultLeaderRetrievalService]:
Starting DefaultLeaderRetrievalService with
KubernetesLeaderRetrievalDriver{configMapName='data-agg-events-insertion-cluster-config-map'}.
[2022-09-01T19:34:13,888][Info] {} [o.a.k.c.NetworkClient]: [Producer
clientId=producer-1] Node -3 disconnected.
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by
org.jboss.netty.util.internal.ByteBufferUtil
(file:/tmp/flink-rpc-akka_fd65d1f4-ddde-4df6-b152-d95b51308356.jar) to method
java.nio.DirectByteBuffer.cleaner()
WARNING: Please consider reporting this to the maintainers of
org.jboss.netty.util.internal.ByteBufferUtil
WARNING: Use --illegal-access=warn to enable warnings of further illegal
reflective access operations
WARNING: All illegal access operations will be denied in a future release
[2022-09-04T02:05:33,097][Error] {} [i.f.k.c.e.l.LeaderElector]: Exception
occurred while acquiring lock 'ConfigMapLock: dev-0-flink-jobs -
data-agg-events-insertion-cluster-config-map
(b6da2ae2-ad2b-471c-801e-ea460a348fab)'
io.fabric8.kubernetes.client.KubernetesClientException: Operation: [get] for
kind: [ConfigMap] with name: [data-agg-events-insertion-cluster-config-map]
in namespace: [dev-0-flink-jobs] failed.
at
io.fabric8.kubernetes.client.KubernetesClientException.launderThrowable(KubernetesClientException.java:64)
~[flink-dist-1.15.1.jar:1.15.1]
at
io.fabric8.kubernetes.client.KubernetesClientException.launderThrowable(KubernetesClientException.java:72)
~[flink-dist-1.15.1.jar:1.15.1]
at
io.fabric8.kubernetes.client.dsl.base.BaseOperation.getMandatory(BaseOperation.java:205)
~[flink-dist-1.15.1.jar:1.15.1]
at
io.fabric8.kubernetes.client.dsl.base.BaseOperation.get(BaseOperation.java:167)
~[flink-dist-1.15.1.jar:1.15.1]
at
io.fabric8.kubernetes.client.dsl.base.BaseOperation.get(BaseOperation.java:90)
~[flink-dist-1.15.1.jar:1.15.1]
at
io.fabric8.kubernetes.client.extended.leaderelection.resourcelock.ConfigMapLock.get(ConfigMapLock.java:55)
~[flink-dist-1.15.1.jar:1.15.1]
at
io.fabric8.kubernetes.client.extended.leaderelection.LeaderElector.tryAcquireOrRenew(LeaderElector.java:134)
~[flink-dist-1.15.1.jar:1.15.1]
at
io.fabric8.kubernetes.client.extended.leaderelection.LeaderElector.lambda$acquire$0(LeaderElector.java:82)
~[flink-dist-1.15.1.jar:1.15.1]
at
io.fabric8.kubernetes.client.extended.leaderelection.LeaderElector.lambda$loop$3(LeaderElector.java:198)
~[flink-dist-1.15.1.jar:1.15.1]
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
~[?:?]
at java.util.concurrent.FutureTask.runAndReset(Unknown Source) ~[?:?]
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown
Source) ~[?:?]
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
~[?:?]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
~[?:?]
at java.lang.Thread.run(Unknown Source) ~[?:?]
Caused by: java.io.FileNotFoundException: /opt/flink/.kube/config (No such file
or directory)
at java.io.FileInputStream.open0(Native Method) ~[?:?]
at java.io.FileInputStream.open(Unknown Source) ~[?:?]
at java.io.FileInputStream.<init>(Unknown Source) ~[?:?]
at
org.apache.flink.kubernetes.shaded.com.fasterxml.jackson.dataformat.yaml.YAMLFactory.createParser(YAMLFactory.java:354)
~[flink-dist-1.15.1.jar:1.15.1]
at
org.apache.flink.kubernetes.shaded.com.fasterxml.jackson.dataformat.yaml.YAMLFactory.createParser(YAMLFactory.java:15)
~[flink-dist-1.15.1.jar:1.15.1]
at
org.apache.flink.kubernetes.shaded.com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:3494)
~[flink-dist-1.15.1.jar:1.15.1]
at
io.fabric8.kubernetes.client.internal.KubeConfigUtils.parseConfig(KubeConfigUtils.java:42)
~[flink-dist-1.15.1.jar:1.15.1]
at
io.fabric8.kubernetes.client.utils.TokenRefreshInterceptor.intercept(TokenRefreshInterceptor.java:44)
~[flink-dist-1.15.1.jar:1.15.1]
at
org.apache.flink.kubernetes.shaded.okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:142)
~[flink-dist-1.15.1.jar:1.15.1]
at
org.apache.flink.kubernetes.shaded.okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:117)
~[flink-dist-1.15.1.jar:1.15.1]
at
io.fabric8.kubernetes.client.utils.ImpersonatorInterceptor.intercept(ImpersonatorInterceptor.java:68)
~[flink-dist-1.15.1.jar:1.15.1]
at
org.apache.flink.kubernetes.shaded.okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:142)
~[flink-dist-1.15.1.jar:1.15.1]
at
org.apache.flink.kubernetes.shaded.okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:117)
~[flink-dist-1.15.1.jar:1.15.1]
at
io.fabric8.kubernetes.client.utils.HttpClientUtils.lambda$createApplicableInterceptors$6(HttpClientUtils.java:290)
~[flink-dist-1.15.1.jar:1.15.1]
at
org.apache.flink.kubernetes.shaded.okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:142)
~[flink-dist-1.15.1.jar:1.15.1]
at
org.apache.flink.kubernetes.shaded.okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:117)
~[flink-dist-1.15.1.jar:1.15.1]
at
org.apache.flink.kubernetes.shaded.okhttp3.RealCall.getResponseWithInterceptorChain(RealCall.java:229)
~[flink-dist-1.15.1.jar:1.15.1]
at
org.apache.flink.kubernetes.shaded.okhttp3.RealCall.execute(RealCall.java:81)
~[flink-dist-1.15.1.jar:1.15.1]
at
io.fabric8.kubernetes.client.dsl.base.OperationSupport.retryWithExponentialBackoff(OperationSupport.java:585)
~[flink-dist-1.15.1.jar:1.15.1]
at
io.fabric8.kubernetes.client.dsl.base.OperationSupport.handleResponse(OperationSupport.java:558)
~[flink-dist-1.15.1.jar:1.15.1]
at
io.fabric8.kubernetes.client.dsl.base.OperationSupport.handleResponse(OperationSupport.java:521)
~[flink-dist-1.15.1.jar:1.15.1]
at
io.fabric8.kubernetes.client.dsl.base.OperationSupport.handleGet(OperationSupport.java:488)
~[flink-dist-1.15.1.jar:1.15.1]
at
io.fabric8.kubernetes.client.dsl.base.OperationSupport.handleGet(OperationSupport.java:470)
~[flink-dist-1.15.1.jar:1.15.1]
at
io.fabric8.kubernetes.client.dsl.base.BaseOperation.handleGet(BaseOperation.java:830)
~[flink-dist-1.15.1.jar:1.15.1]
at
io.fabric8.kubernetes.client.dsl.base.BaseOperation.getMandatory(BaseOperation.java:200)
~[flink-dist-1.15.1.jar:1.15.1]
... 12 more
