Java Exception - UncheckedExecutionException #13141

senthilnathan-am · 2025-03-25T06:12:39Z

senthilnathan-am
Mar 25, 2025

Hello,

Installed Skywalking latest version and trying to monitor external kubernetes cluster(Istio installed) through it. Followed the steps mentioned at https://skywalking.apache.org/docs/main/next/en/setup/backend/backend-k8s-monitoring/ and configured cadvisor and kube-state-metrics jobs in collector service.

On cluster menu, I could see the number of pods, deployment numbers are displayed but few other graphs are not shown. Under service menu, none of the metrics are shown.

In logs, I could see few exceptions, looks like it is trying to fetch details from kube-system namespace. Need an expert help to fix this error and need to know what is causing this issue.

2025-03-25 06:01:45,510 - org.apache.skywalking.oap.meter.analyzer.dsl.Expression - 92 [grpc-default-executor-1352] ERROR [] - failed to run "(kube_pod_status_phase.retagByK8sMeta('service' , K8sRetagType.Pod2Service , 'pod' , 'namespace').tagNotEqual('service' , '').valueEqual(1).sum(['cluster' , 'service' , 'pod' , 'phase'])).service(['cluster' , 'service'], '::', Layer.K8S_SERVICE)"
com.google.common.util.concurrent.UncheckedExecutionException: com.google.common.util.concurrent.UncheckedExecutionException: io.fabric8.kubernetes.client.KubernetesClientException: Operation: [get]  for kind: [Pod]  with name: [kube-proxy-qjmld]  in namespace: [kube-system]  failed.
        at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2085) ~[guava-32.0.1-jre.jar:?]
        at com.google.common.cache.LocalCache.get(LocalCache.java:4011) ~[guava-32.0.1-jre.jar:?]
        at com.google.common.cache.LocalCache.getOrLoad(LocalCache.java:4034) ~[guava-32.0.1-jre.jar:?]
        at com.google.common.cache.LocalCache$LocalLoadingCache.get(LocalCache.java:5010) ~[guava-32.0.1-jre.jar:?]
        at org.apache.skywalking.oap.meter.analyzer.k8s.K8sInfoRegistry.findService(K8sInfoRegistry.java:133) ~[meter-analyzer-10.1.0.jar:10.1.0]
        at org.apache.skywalking.oap.meter.analyzer.k8s.K8sInfoRegistry.findServiceName(K8sInfoRegistry.java:128) ~[meter-analyzer-10.1.0.jar:10.1.0]
        at org.apache.skywalking.oap.meter.analyzer.dsl.tagOpt.K8sRetagType$1.lambda$execute$0(K8sRetagType.java:40) ~[meter-analyzer-10.1.0.jar:10.1.0]
        at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197) ~[?:?]
        at java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:1024) ~[?:?]
        at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) ~[?:?]
        at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) ~[?:?]
        at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:575) ~[?:?]
        at java.util.stream.AbstractPipeline.evaluateToArrayNode(AbstractPipeline.java:260) ~[?:?]
        at java.util.stream.ReferencePipeline.toArray(ReferencePipeline.java:616) ~[?:?]
        at org.apache.skywalking.oap.meter.analyzer.dsl.tagOpt.K8sRetagType$1.execute(K8sRetagType.java:49) ~[meter-analyzer-10.1.0.jar:10.1.0]
        at org.apache.skywalking.oap.meter.analyzer.dsl.SampleFamily.retagByK8sMeta(SampleFamily.java:429) ~[meter-analyzer-10.1.0.jar:10.1.0]
        at org.codehaus.groovy.vmplugin.v8.IndyInterface.fromCache(IndyInterface.java:321) ~[groovy-4.0.15.jar:4.0.15]
        at Script1.run(Script1.groovy:1) ~[?:?]
        at org.apache.skywalking.oap.meter.analyzer.dsl.Expression.run(Expression.java:81) ~[meter-analyzer-10.1.0.jar:10.1.0]
        at org.apache.skywalking.oap.meter.analyzer.Analyzer.analyse(Analyzer.java:133) ~[meter-analyzer-10.1.0.jar:10.1.0]
        at org.apache.skywalking.oap.meter.analyzer.MetricConvert.toMeter(MetricConvert.java:109) ~[meter-analyzer-10.1.0.jar:10.1.0]
        at org.apache.skywalking.oap.server.receiver.otel.otlp.OpenTelemetryMetricRequestProcessor.lambda$processMetricsRequest$6(OpenTelemetryMetricRequestProcessor.java:123) ~[otel-receiver-plugin-10.1.0.jar:10.1.0]
        at java.util.ArrayList.forEach(ArrayList.java:1596) ~[?:?]
        at org.apache.skywalking.oap.server.receiver.otel.otlp.OpenTelemetryMetricRequestProcessor.lambda$processMetricsRequest$7(OpenTelemetryMetricRequestProcessor.java:123) ~[otel-receiver-plugin-10.1.0.jar:10.1.0]
        at java.util.ArrayList.forEach(ArrayList.java:1596) ~[?:?]
        at java.util.Collections$UnmodifiableCollection.forEach(Collections.java:1116) ~[?:?]
        at org.apache.skywalking.oap.server.receiver.otel.otlp.OpenTelemetryMetricRequestProcessor.processMetricsRequest(OpenTelemetryMetricRequestProcessor.java:96) ~[otel-receiver-plugin-10.1.0.jar:10.1.0]
        at org.apache.skywalking.oap.server.receiver.otel.otlp.OpenTelemetryMetricHandler.export(OpenTelemetryMetricHandler.java:59) ~[otel-receiver-plugin-10.1.0.jar:10.1.0]
        at io.opentelemetry.proto.collector.metrics.v1.MetricsServiceGrpc$MethodHandlers.invoke(MetricsServiceGrpc.java:246) ~[receiver-proto-10.1.0.jar:10.1.0]
        at io.grpc.stub.ServerCalls$UnaryServerCallHandler$UnaryServerCallListener.onHalfClose(ServerCalls.java:182) ~[grpc-stub-1.63.0.jar:1.63.0]
        at io.grpc.internal.ServerCallImpl$ServerStreamListenerImpl.halfClosed(ServerCallImpl.java:356) ~[grpc-core-1.63.0.jar:1.63.0]
        at io.grpc.internal.ServerImpl$JumpToApplicationThreadServerStreamListener$1HalfClosed.runInContext(ServerImpl.java:861) ~[grpc-core-1.63.0.jar:1.63.0]
        at io.grpc.internal.ContextRunnable.run(ContextRunnable.java:37) ~[grpc-core-1.63.0.jar:1.63.0]
        at io.grpc.internal.SerializingExecutor.run(SerializingExecutor.java:133) ~[grpc-core-1.63.0.jar:1.63.0]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144) ~[?:?]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642) ~[?:?]
        at java.lang.Thread.run(Thread.java:1583) [?:?]
Caused by: com.google.common.util.concurrent.UncheckedExecutionException: io.fabric8.kubernetes.client.KubernetesClientException: Operation: [get]  for kind: [Pod]  with name: [kube-proxy-qjmld]  in namespace: [kube-system]  failed.
        at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2085) ~[guava-32.0.1-jre.jar:?]
        at com.google.common.cache.LocalCache.get(LocalCache.java:4011) ~[guava-32.0.1-jre.jar:?]
        at com.google.common.cache.LocalCache.getOrLoad(LocalCache.java:4034) ~[guava-32.0.1-jre.jar:?]
        at com.google.common.cache.LocalCache$LocalLoadingCache.get(LocalCache.java:5010) ~[guava-32.0.1-jre.jar:?]
        at org.apache.skywalking.library.kubernetes.KubernetesPods.findByObjectID(KubernetesPods.java:82) ~[library-kubernetes-support-10.1.0.jar:10.1.0]
        at org.apache.skywalking.oap.meter.analyzer.k8s.K8sInfoRegistry.lambda$new$16(K8sInfoRegistry.java:84) ~[meter-analyzer-10.1.0.jar:10.1.0]
        at com.google.common.cache.CacheLoader$FunctionToCacheLoader.load(CacheLoader.java:169) ~[guava-32.0.1-jre.jar:?]
        at com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3570) ~[guava-32.0.1-jre.jar:?]
        at com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2312) ~[guava-32.0.1-jre.jar:?]
        at com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2189) ~[guava-32.0.1-jre.jar:?]
        at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2079) ~[guava-32.0.1-jre.jar:?]
        ... 36 more
Caused by: io.fabric8.kubernetes.client.KubernetesClientException: Operation: [get]  for kind: [Pod]  with name: [kube-proxy-qjmld]  in namespace: [kube-system]  failed.
        at io.fabric8.kubernetes.client.KubernetesClientException.launderThrowable(KubernetesClientException.java:159) ~[kubernetes-client-api-6.7.1.jar:?]
        at io.fabric8.kubernetes.client.dsl.internal.BaseOperation.requireFromServer(BaseOperation.java:187) ~[kubernetes-client-6.7.1.jar:?]
        at io.fabric8.kubernetes.client.dsl.internal.BaseOperation.get(BaseOperation.java:141) ~[kubernetes-client-6.7.1.jar:?]
        at io.fabric8.kubernetes.client.dsl.internal.BaseOperation.get(BaseOperation.java:92) ~[kubernetes-client-6.7.1.jar:?]
        at org.apache.skywalking.library.kubernetes.KubernetesPods$2.load(KubernetesPods.java:69) ~[library-kubernetes-support-10.1.0.jar:10.1.0]
        at org.apache.skywalking.library.kubernetes.KubernetesPods$2.load(KubernetesPods.java:60) ~[library-kubernetes-support-10.1.0.jar:10.1.0]
        at com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3570) ~[guava-32.0.1-jre.jar:?]
        at com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2312) ~[guava-32.0.1-jre.jar:?]
        at com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2189) ~[guava-32.0.1-jre.jar:?]
        at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2079) ~[guava-32.0.1-jre.jar:?]
        at com.google.common.cache.LocalCache.get(LocalCache.java:4011) ~[guava-32.0.1-jre.jar:?]
        at com.google.common.cache.LocalCache.getOrLoad(LocalCache.java:4034) ~[guava-32.0.1-jre.jar:?]
        at com.google.common.cache.LocalCache$LocalLoadingCache.get(LocalCache.java:5010) ~[guava-32.0.1-jre.jar:?]
        at org.apache.skywalking.library.kubernetes.KubernetesPods.findByObjectID(KubernetesPods.java:82) ~[library-kubernetes-support-10.1.0.jar:10.1.0]
        at org.apache.skywalking.oap.meter.analyzer.k8s.K8sInfoRegistry.lambda$new$16(K8sInfoRegistry.java:84) ~[meter-analyzer-10.1.0.jar:10.1.0]
        at com.google.common.cache.CacheLoader$FunctionToCacheLoader.load(CacheLoader.java:169) ~[guava-32.0.1-jre.jar:?]
        at com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3570) ~[guava-32.0.1-jre.jar:?]
        at com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2312) ~[guava-32.0.1-jre.jar:?]
        at com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2189) ~[guava-32.0.1-jre.jar:?]
        at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2079) ~[guava-32.0.1-jre.jar:?]
        ... 36 more
Caused by: java.io.IOException
        at io.fabric8.kubernetes.client.dsl.internal.OperationSupport.waitForResult(OperationSupport.java:515) ~[kubernetes-client-6.7.1.jar:?]
        at io.fabric8.kubernetes.client.dsl.internal.OperationSupport.handleResponse(OperationSupport.java:535) ~[kubernetes-client-6.7.1.jar:?]
        at io.fabric8.kubernetes.client.dsl.internal.OperationSupport.handleGet(OperationSupport.java:478) ~[kubernetes-client-6.7.1.jar:?]
        at io.fabric8.kubernetes.client.dsl.internal.BaseOperation.handleGet(BaseOperation.java:741) ~[kubernetes-client-6.7.1.jar:?]
        at io.fabric8.kubernetes.client.dsl.internal.BaseOperation.requireFromServer(BaseOperation.java:185) ~[kubernetes-client-6.7.1.jar:?]
        at io.fabric8.kubernetes.client.dsl.internal.BaseOperation.get(BaseOperation.java:141) ~[kubernetes-client-6.7.1.jar:?]
        at io.fabric8.kubernetes.client.dsl.internal.BaseOperation.get(BaseOperation.java:92) ~[kubernetes-client-6.7.1.jar:?]
        at org.apache.skywalking.library.kubernetes.KubernetesPods$2.load(KubernetesPods.java:69) ~[library-kubernetes-support-10.1.0.jar:10.1.0]
        at org.apache.skywalking.library.kubernetes.KubernetesPods$2.load(KubernetesPods.java:60) ~[library-kubernetes-support-10.1.0.jar:10.1.0]
        at com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3570) ~[guava-32.0.1-jre.jar:?]
        at com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2312) ~[guava-32.0.1-jre.jar:?]
        at com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2189) ~[guava-32.0.1-jre.jar:?]
        at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2079) ~[guava-32.0.1-jre.jar:?]
        at com.google.common.cache.LocalCache.get(LocalCache.java:4011) ~[guava-32.0.1-jre.jar:?]
        at com.google.common.cache.LocalCache.getOrLoad(LocalCache.java:4034) ~[guava-32.0.1-jre.jar:?]
        at com.google.common.cache.LocalCache$LocalLoadingCache.get(LocalCache.java:5010) ~[guava-32.0.1-jre.jar:?]
        at org.apache.skywalking.library.kubernetes.KubernetesPods.findByObjectID(KubernetesPods.java:82) ~[library-kubernetes-support-10.1.0.jar:10.1.0]
        at org.apache.skywalking.oap.meter.analyzer.k8s.K8sInfoRegistry.lambda$new$16(K8sInfoRegistry.java:84) ~[meter-analyzer-10.1.0.jar:10.1.0]
        at com.google.common.cache.CacheLoader$FunctionToCacheLoader.load(CacheLoader.java:169) ~[guava-32.0.1-jre.jar:?]
        at com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3570) ~[guava-32.0.1-jre.jar:?]
        at com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2312) ~[guava-32.0.1-jre.jar:?]
        at com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2189) ~[guava-32.0.1-jre.jar:?]
        at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2079) ~[guava-32.0.1-jre.jar:?]
        ... 36 more
Caused by: java.net.ConnectException
        at jdk.internal.net.http.common.Utils.toConnectException(Utils.java:1041) ~[java.net.http:?]
        at jdk.internal.net.http.PlainHttpConnection.connectAsync(PlainHttpConnection.java:227) ~[java.net.http:?]
        at jdk.internal.net.http.AsyncSSLConnection.connectAsync(AsyncSSLConnection.java:56) ~[java.net.http:?]
        at jdk.internal.net.http.Http2Connection.createAsync(Http2Connection.java:527) ~[java.net.http:?]
        at jdk.internal.net.http.Http2ClientImpl.getConnectionFor(Http2ClientImpl.java:138) ~[java.net.http:?]
        at jdk.internal.net.http.ExchangeImpl.get(ExchangeImpl.java:94) ~[java.net.http:?]
        at jdk.internal.net.http.Exchange.establishExchange(Exchange.java:391) ~[java.net.http:?]
        at jdk.internal.net.http.Exchange.responseAsyncImpl0(Exchange.java:584) ~[java.net.http:?]
        at jdk.internal.net.http.Exchange.responseAsyncImpl(Exchange.java:428) ~[java.net.http:?]
        at jdk.internal.net.http.Exchange.responseAsync(Exchange.java:420) ~[java.net.http:?]
        at jdk.internal.net.http.MultiExchange.responseAsyncImpl(MultiExchange.java:413) ~[java.net.http:?]
        at jdk.internal.net.http.MultiExchange.lambda$responseAsyncImpl$7(MultiExchange.java:454) ~[java.net.http:?]
        at java.util.concurrent.CompletableFuture.uniHandle(CompletableFuture.java:934) ~[?:?]
        at java.util.concurrent.CompletableFuture.uniHandleStage(CompletableFuture.java:950) ~[?:?]
        at java.util.concurrent.CompletableFuture.handle(CompletableFuture.java:2372) ~[?:?]
        at jdk.internal.net.http.MultiExchange.responseAsyncImpl(MultiExchange.java:444) ~[java.net.http:?]
        at jdk.internal.net.http.MultiExchange.lambda$responseAsync0$2(MultiExchange.java:346) ~[java.net.http:?]
        at java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1150) ~[?:?]
        at java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:510) ~[?:?]
        at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1773) ~[?:?]
        ... 3 more
Caused by: java.nio.channels.UnresolvedAddressException
        at sun.nio.ch.Net.checkAddress(Net.java:137) ~[?:?]
        at sun.nio.ch.Net.checkAddress(Net.java:145) ~[?:?]
        at sun.nio.ch.SocketChannelImpl.checkRemote(SocketChannelImpl.java:842) ~[?:?]
        at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:865) ~[?:?]
        at jdk.internal.net.http.PlainHttpConnection.lambda$connectAsync$1(PlainHttpConnection.java:210) ~[java.net.http:?]
        at java.security.AccessController.doPrivileged(AccessController.java:571) ~[?:?]
        at jdk.internal.net.http.PlainHttpConnection.connectAsync(PlainHttpConnection.java:212) ~[java.net.http:?]
        at jdk.internal.net.http.AsyncSSLConnection.connectAsync(AsyncSSLConnection.java:56) ~[java.net.http:?]
        at jdk.internal.net.http.Http2Connection.createAsync(Http2Connection.java:527) ~[java.net.http:?]
        at jdk.internal.net.http.Http2ClientImpl.getConnectionFor(Http2ClientImpl.java:138) ~[java.net.http:?]
        at jdk.internal.net.http.ExchangeImpl.get(ExchangeImpl.java:94) ~[java.net.http:?]
        at jdk.internal.net.http.Exchange.establishExchange(Exchange.java:391) ~[java.net.http:?]
        at jdk.internal.net.http.Exchange.responseAsyncImpl0(Exchange.java:584) ~[java.net.http:?]
        at jdk.internal.net.http.Exchange.responseAsyncImpl(Exchange.java:428) ~[java.net.http:?]
        at jdk.internal.net.http.Exchange.responseAsync(Exchange.java:420) ~[java.net.http:?]
        at jdk.internal.net.http.MultiExchange.responseAsyncImpl(MultiExchange.java:413) ~[java.net.http:?]
        at jdk.internal.net.http.MultiExchange.lambda$responseAsyncImpl$7(MultiExchange.java:454) ~[java.net.http:?]
        at java.util.concurrent.CompletableFuture.uniHandle(CompletableFuture.java:934) ~[?:?]
        at java.util.concurrent.CompletableFuture.uniHandleStage(CompletableFuture.java:950) ~[?:?]
        at java.util.concurrent.CompletableFuture.handle(CompletableFuture.java:2372) ~[?:?]
        at jdk.internal.net.http.MultiExchange.responseAsyncImpl(MultiExchange.java:444) ~[java.net.http:?]
        at jdk.internal.net.http.MultiExchange.lambda$responseAsync0$2(MultiExchange.java:346) ~[java.net.http:?]
        at java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1150) ~[?:?]
        at java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:510) ~[?:?]
        at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1773) ~[?:?]
        ... 3 more

wu-sheng · 2025-03-25T06:14:45Z

wu-sheng
Mar 25, 2025
Collaborator

Do you follow the showcase to make sure the installation correct? https://skywalking.apache.org/docs/skywalking-showcase/next/readme/

0 replies

wu-sheng · 2025-03-25T06:21:50Z

wu-sheng
Mar 25, 2025
Collaborator

com.google.common.util.concurrent.UncheckedExecutionException: com.google.common.util.concurrent.UncheckedExecutionException: io.fabric8.kubernetes.client.KubernetesClientException: Operation: [get]  for kind: [Pod]  with name: [kube-proxy-qjmld]  in namespace: [kube-system]  failed.
        at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2085) ~[guava-32.0.1-jre.jar:?]
        at com.google.common.cache.LocalCache.get(LocalCache.java:4011) ~[guava-32.0.1-jre.jar:?]
        at com.google.common.cache.LocalCache.getOrLoad(LocalCache.java:4034) ~[guava-32.0.1-jre.jar:?]
        at com.google.common.cache.LocalCache$LocalLoadingCache.get(LocalCache.java:5010) ~[guava-32.0.1-jre.jar:?]
        at org.apache.skywalking.oap.meter.analyzer.k8s.K8sInfoRegistry.findService(K8sInfoRegistry.java:133) ~[meter-analyzer-10.1.0.jar:10.1.0]
        at org.apache.skywalking.oap.meter.analyzer.k8s.K8sInfoRegistry.findServiceName(K8sInfoRegistry.java:128) ~[meter-analyzer-10.1.0.jar:10.1.0]
        at org.apache.skywalking.oap.meter.analyzer.dsl.tagOpt.K8sRetagType$1.lambda$execute$0(K8sRetagType.java:40) ~[meter-analyzer-10.1.0.jar:10.1.0]
        at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197) ~[?:?]
        at java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:1024) ~[?:?]

From these logs, it seems your oap server can't access the k8s API server, so it can't get the deployment metadata.

0 replies

senthilnathan-am · 2025-03-25T06:28:58Z

senthilnathan-am
Mar 25, 2025
Author

Thanks @wu-sheng for pointing out the issue. For your information, skywalking is installed in a standalone machine and it is configured to monitor external k8 cluster. Followed the steps mentioned at https://skywalking.apache.org/docs/main/next/en/setup/backend/backend-k8s-monitoring/ . I am sure there is no network issue between the machines

Is there any way to configure k8s API server details on skywalking server application.yaml file?

Also, is the skywalking is capable of monitoring remote k8 cluster?

1 reply

wu-sheng Mar 25, 2025
Collaborator

I don't think this is a good practice to expose api server out of the k8s.
K8s community should have more detailed guides.

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