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https://issues.apache.org/jira/browse/FLINK-21685?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17303866#comment-17303866
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Yang Wang commented on FLINK-21685:
-----------------------------------
[~trohrmann] At the very beginning, we have dedicated thread pool for
{{Fabric8FlinkKubeClient}}. The default value is 4 and I think it is enough for
almost cases. But we make Kubernetes Client in KubernetesResourceManagerDriver
use io-executor in FLINK-19700.
So are you suggesting to change back to use the dedicated thread pool for
{{Fabric8FlinkKubeClient}}? After then, I think we also need to introduce a new
config option to configure the pool size.
Beyond this change, I still have the concern about how we calculate the default
io-executor pool size based on hardware information. In containerize
environment, it will cause the value too small.
> Flink JobManager failed to restart from checkpoint in kubernetes HA setup
> -------------------------------------------------------------------------
>
> Key: FLINK-21685
> URL: https://issues.apache.org/jira/browse/FLINK-21685
> Project: Flink
> Issue Type: Bug
> Components: Deployment / Kubernetes
> Affects Versions: 1.12.1, 1.12.2
> Reporter: Peng Zhang
> Priority: Major
> Attachments: 01-role.yaml, 02-role-binding.yaml, 03-config.yaml,
> 06-jobmanager-deployment.yaml, 08-taskmanager-deployment.yaml, flink-ha.log,
> jstack.jm.1, scalyr-logs.txt.zip
>
>
> We use Flink K8S session cluster with HA mode (1 JobManager and 4
> TaskManagers). When jobs are running in Flink, and JobManager restarted,
> Flink JobManager failed to recover job from checkpoint
> {code}
> 2021-03-08 13:16:42,962 INFO
> org.apache.flink.runtime.checkpoint.DefaultCompletedCheckpointStore [] -
> Trying to fetch 1 checkpoints from storage.
> 2021-03-08 13:16:42,962 INFO
> org.apache.flink.runtime.checkpoint.DefaultCompletedCheckpointStore [] -
> Trying to fetch 1 checkpoints from storage.
> 2021-03-08 13:16:42,962 INFO
> org.apache.flink.runtime.checkpoint.DefaultCompletedCheckpointStore [] -
> Trying to retrieve checkpoint 1.
> 2021-03-08 13:16:43,014 INFO
> org.apache.flink.runtime.checkpoint.CheckpointCoordinator [] - Restoring
> job 9a534b2e309b24f78866b65d94082ead from Checkpoint 1 @ 1615208258041 for
> 9a534b2e309b24f78866b65d94082ead located at
> s3a://zalando-stellar-flink-state-eu-central-1-staging/checkpoints/9a534b2e309b24f78866b65d94082ead/chk-1.
>
> 2021-03-08 13:16:43,023 INFO
> org.apache.flink.runtime.checkpoint.CheckpointCoordinator [] - No master
> state to restore
> 2021-03-08 13:16:43,024 INFO org.apache.flink.runtime.jobmaster.JobMaster
> [] - Using failover strategy
> org.apache.flink.runtime.executiongraph.failover.flip1.RestartPipelinedRegionFailoverStrategy@58d927d2
> for BrandCollectionTrackingJob (9a534b2e309b24f78866b65d94082ead).
> 2021-03-08 13:16:43,046 INFO
> org.apache.flink.runtime.jobmaster.JobManagerRunnerImpl [] - JobManager
> runner for job BrandCollectionTrackingJob (9a534b2e309b24f78866b65d94082ead)
> was granted leadership with session id c258d8ce-69d3-49df-8bee-1b748d5bbe74
> at akka.tcp://[email protected]:6123/user/rpc/jobmanager_2.
> 2021-03-08 13:16:43,060 WARN akka.remote.transport.netty.NettyTransport
> [] - Remote connection to [null] failed with
> java.net.NoRouteToHostException: No route to host
> 2021-03-08 13:16:43,060 WARN akka.remote.ReliableDeliverySupervisor
> [] - Association with remote system
> [akka.tcp://[email protected]:6123] has failed, address is now gated for
> [50] ms. Reason: [Association failed with
> [akka.tcp://[email protected]:6123]] Caused by:
> [java.net.NoRouteToHostException: No route to host]
> {code}
> Attached is the log, and our configuration.
>
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