We are trying to setup a single node Kubernetes cluster.
1 Job Manager and 1 Task Manager.
Before we were getting an error, and we followed this thread.
http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/Flink-1-5-4-issues-w-TaskManager-connecting-to-ResourceManager-td23298.html
After following the above mentioned archive , we have used the following 
commands to startup the Flink services :

${FLINK_HOME}/bin/jobmanager.sh start-foreground
${FLINK_HOME}/bin/taskmanager.sh start-foreground

Previously jobmanager was being started as :
${FLINK_HOME}/bin/jobmanager.sh start-foreground  cluster
${FLINK_HOME}/bin/taskmanager.sh start-foreground

It removed that error and now we are getting this error as shown below.
We searched all  archives and have a dead end.
We have set up all ports correctly. Flink version used is 1.6.2.
Thanks in advance.


2018-12-08 06:52:38,959 WARN akka.remote.ReliableDeliverySupervisor - 
Association with remote system 
[akka.tcp://flink@flink-taskmanager-6cf55db87b-5x9sd:6122] has failed, address 
is now gated for [50] ms. Reason: [Disassociated]
          2018-12-08 06:52:41,863 INFO 
org.apache.flink.runtime.resourcemanager.StandaloneResourceManager - 
Registering TaskManager with ResourceID 037d1c33ec0406598f2ce30472f97e65 
(akka.tcp://flink@flink-taskmanager-6cf55db87b-5x9sd:6122/user/taskmanager_0) 
at ResourceManager
          2018-12-08 06:53:23,619 INFO 
org.apache.flink.runtime.resourcemanager.StandaloneResourceManager - The 
heartbeat of TaskManager with id e0383ee248832f639659082c70a2f4e9 timed out.
          2018-12-08 06:53:23,619 INFO 
org.apache.flink.runtime.resourcemanager.StandaloneResourceManager - Closing 
TaskExecutor connection e0383ee248832f639659082c70a2f4e9 because: The heartbeat 
of TaskManager with id e0383ee248832f639659082c70a2f4e9 timed out.
          2018-12-08 06:53:48,961 WARN akka.remote.ReliableDeliverySupervisor - 
Association with remote system 
[akka.tcp://flink@flink-taskmanager-6cf55db87b-5x9sd:6122] has failed, address 
is now gated for [50] ms. Reason: [Disassociated]
          2018-12-08 06:53:53,615 WARN akka.remote.ReliableDeliverySupervisor - 
Association with remote system 
[akka.tcp://flink@flink-taskmanager-6cf55db87b-5x9sd:6122] has failed, address 
is now gated for [50] ms. Reason: [Association failed with 
[akka.tcp://flink@flink-taskmanager-6cf55db87b-5x9sd:6122]] Caused by: 
[flink-taskmanager-6cf55db87b-5x9sd: Name or service not known]
          2018-12-08 06:54:03,601 WARN akka.remote.ReliableDeliverySupervisor - 
Association with remote system 
[akka.tcp://flink@flink-taskmanager-6cf55db87b-5x9sd:6122] has failed, address 
is now gated for [50] ms. Reason: [Association failed with 
[akka.tcp://flink@flink-taskmanager-6cf55db87b-5x9sd:6122]] Caused by: 
[flink-taskmanager-6cf55db87b-5x9sd]
          2018-12-08 06:54:13,605 WARN akka.remote.ReliableDeliverySupervisor - 
Association with remote system 
[akka.tcp://flink@flink-taskmanager-6cf55db87b-5x9sd:6122] has failed, address 
is now gated for [50] ms. Reason: [Association failed with 
[akka.tcp://flink@flink-taskmanager-6cf55db87b-5x9sd:6122]] Caused by: 
[flink-taskmanager-6cf55db87b-5x9sd: Name or service not known]
          2018-12-08 06:54:23,613 WARN akka.remote.ReliableDeliverySupervisor - 
Association with remote system 
[akka.tcp://flink@flink-taskmanager-6cf55db87b-5x9sd:6122] has failed, address 
is now gated for [50] ms. Reason: [Association failed with 
[akka.tcp://flink@flink-taskmanager-6cf55db87b-5x9sd:6122]] Caused by: 
[flink-taskmanager-6cf55db87b-5x9sd: Name or service not known]
          2018-12-08 06:54:33,601 WARN akka.remote.ReliableDeliverySupervisor - 
Association with remote system 
[akka.tcp://flink@flink-taskmanager-6cf55db87b-5x9sd:6122] has failed, address 
is now gated for [50] ms. Reason: [Association failed with 
[akka.tcp://flink@flink-taskmanager-6cf55db87b-5x9sd:6122]] Caused by: 
[flink-taskmanager-6cf55db87b-5x9sd]
          2018-12-08 06:54:33,619 INFO 
org.apache.flink.runtime.resourcemanager.StandaloneResourceManager - The 
heartbeat of TaskManager with id 037d1c33ec0406598f2ce30472f97e65 timed out.
          2018-12-08 06:54:33,619 INFO 
org.apache.flink.runtime.resourcemanager.StandaloneResourceManager - Closing 
TaskExecutor connection 037d1c33ec0406598f2ce30472f97e65 because: The heartbeat 
of TaskManager with id 037d1c33ec0406598f2ce30472f97e65 timed out.
          2018-12-08 06:59:04,160 INFO 
org.apache.flink.runtime.resourcemanager.StandaloneResourceManager - 
Registering TaskManager with ResourceID 0c12c8035663c0b7bc94d520b3c6ff0a 
(akka.tcp://flink@flink-taskmanager-6cf55db87b-5x9sd:6122/user/taskmanager_0) 
at ResourceManager
          2018-12-08 07:00:08,983 WARN akka.remote.ReliableDeliverySupervisor - 
Association with remote system 
[akka.tcp://flink@flink-taskmanager-6cf55db87b-5x9sd:6122] has failed, address 
is now gated for [50] ms. Reason: [Disassociated]
          2018-12-08 07:00:12,040 INFO 
org.apache.flink.runtime.resourcemanager.StandaloneResourceManager - 
Registering TaskManager with ResourceID 8949a9d85ec65b207654b28bf60ba10c 
(akka.tcp://flink@flink-taskmanager-6cf55db87b-5x9sd:6122/user/taskmanager_0) 
at ResourceManager
          2018-12-08 07:00:53,619 INFO 
org.apache.flink.runtime.resourcemanager.StandaloneResourceManager - The 
heartbeat of TaskManager with id 0c12c8035663c0b7bc94d520b3c6ff0a timed out.
          2018-12-08 07:00:53,619 INFO 
org.apache.flink.runtime.resourcemanager.StandaloneResourceManager - Closing 
TaskExecutor connection 0c12c8035663c0b7bc94d520b3c6ff0a because: The heartbeat 
of TaskManager with id 0c12c8035663c0b7bc94d520b3c6ff0a timed out.
          2018-12-08 07:01:18,969 WARN akka.remote.ReliableDeliverySupervisor - 
Association with remote system 
[akka.tcp://flink@flink-taskmanager-6cf55db87b-5x9sd:6122] has failed, address 
is now gated for [50] ms. Reason: [Disassociated]
          2018-12-08 07:01:23,604 WARN akka.remote.ReliableDeliverySupervisor - 
Association with remote system 
[akka.tcp://flink@flink-taskmanager-6cf55db87b-5x9sd:6122] has failed, address 
is now gated for [50] ms. Reason: [Association failed with 
[akka.tcp://flink@flink-taskmanager-6cf55db87b-5x9sd:6122]] Caused by: 
[flink-taskmanager-6cf55db87b-5x9sd: Name or service not known]
          2018-12-08 07:01:33,601 WARN akka.remote.ReliableDeliverySupervisor - 
Association with remote system 
[akka.tcp://flink@flink-taskmanager-6cf55db87b-5x9sd:6122] has failed, address 
is now gated for [50] ms. Reason: [Association failed with 
[akka.tcp://flink@flink-taskmanager-6cf55db87b-5x9sd:6122]] Caused by: 
[flink-taskmanager-6cf55db87b-5x9sd]
          2018-12-08 07:01:43,615 WARN akka.remote.ReliableDeliverySupervisor - 
Association with remote system 
[akka.tcp://flink@flink-taskmanager-6cf55db87b-5x9sd:6122] has failed, address 
is now gated for [50] ms. Reason: [Association failed with 
[akka.tcp://flink@flink-taskmanager-6cf55db87b-5x9sd:6122]] Caused by: 
[flink-taskmanager-6cf55db87b-5x9sd: Name or service not known]
          2018-12-08 07:01:53,601 WARN akka.remote.ReliableDeliverySupervisor - 
Association with remote system 
[akka.tcp://flink@flink-taskmanager-6cf55db87b-5x9sd:6122] has failed, address 
is now gated for [50] ms. Reason: [Association failed with 
[akka.tcp://flink@flink-taskmanager-6cf55db87b-5x9sd:6122]] Caused by: 
[flink-taskmanager-6cf55db87b-5x9sd]
          2018-12-08 07:02:03,614 WARN akka.remote.ReliableDeliverySupervisor - 
Association with remote system 
[akka.tcp://flink@flink-taskmanager-6cf55db87b-5x9sd:6122] has failed, address 
is now gated for [50] ms. Reason: [Association failed with 
[akka.tcp://flink@flink-taskmanager-6cf55db87b-5x9sd:6122]] Caused by: 
[flink-taskmanager-6cf55db87b-5x9sd: Name or service not known]
          2018-12-08 07:02:03,619 INFO 
org.apache.flink.runtime.resourcemanager.StandaloneResourceManager - The 
heartbeat of TaskManager with id 8949a9d85ec65b207654b28bf60ba10c timed out.
          2018-12-08 07:02:03,620 INFO 
org.apache.flink.runtime.resourcemanager.StandaloneResourceManager - Closing 
TaskExecutor connection 8949a9d85ec65b207654b28bf60ba10c because: The heartbeat 
of TaskManager with id 8949a9d85ec65b207654b28bf60ba10c timed out.
          2018-12-08 07:06:22,248 INFO 
org.apache.flink.runtime.resourcemanager.StandaloneResourceManager - 
Registering TaskManager with ResourceID 79676d2993f4c61c8a17e37555d50474 
(akka.tcp://flink@flink-taskmanager-6cf55db87b-5x9sd:6122/user/taskmanager_0) 
at ResourceManager
          2018-12-08 07:07:28,960 WARN akka.remote.ReliableDeliverySupervisor - 
Association with remote system 
[akka.tcp://flink@flink-taskmanager-6cf55db87b-5x9sd:6122] has failed, address 
is now gated for [50] ms. Reason: [Disassociated]
          2018-12-08 07:07:31,900 INFO 
org.apache.flink.runtime.resourcemanager.StandaloneResourceManager - 
Registering TaskManager with ResourceID 231a4d51d784b397cc4c5f49559b92bf 
(akka.tcp://flink@flink-taskmanager-6cf55db87b-5x9sd:6122/user/taskmanager_0) 
at ResourceManager
          2018-12-08 07:08:13,639 INFO 
org.apache.flink.runtime.resourcemanager.StandaloneResourceManager - The 
heartbeat of TaskManager with id 79676d2993f4c61c8a17e37555d50474 timed out.
          2018-12-08 07:08:13,639 INFO 
org.apache.flink.runtime.resourcemanager.StandaloneResourceManager - Closing 
TaskExecutor connection 79676d2993f4c61c8a17e37555d50474 because: The heartbeat 
of TaskManager with id 79676d2993f4c61c8a17e37555d50474 timed out.
          2018-12-08 07:08:38,968 WARN akka.remote.ReliableDeliverySupervisor - 
Association with remote system 
[akka.tcp://flink@flink-taskmanager-6cf55db87b-5x9sd:6122] has failed, address 
is now gated for [50] ms. Reason: [Disassociated]
          2018-12-08 07:08:43,611 WARN akka.remote.ReliableDeliverySupervisor - 
Association with remote system 
[akka.tcp://flink@flink-taskmanager-6cf55db87b-5x9sd:6122] has failed, address 
is now gated for [50] ms. Reason: [Association failed with 
[akka.tcp://flink@flink-taskmanager-6cf55db87b-5x9sd:6122]] Caused by: 
[flink-taskmanager-6cf55db87b-5x9sd: Name or service not known]
          2018-12-08 07:08:53,601 WARN akka.remote.ReliableDeliverySupervisor - 
Association with remote system 
[akka.tcp://flink@flink-taskmanager-6cf55db87b-5x9sd:6122] has failed, address 
is now gated for [50] ms. Reason: [Association failed with 
[akka.tcp://flink@flink-taskmanager-6cf55db87b-5x9sd:6122]] Caused by: 
[flink-taskmanager-6cf55db87b-5x9sd]
          2018-12-08 07:09:03,604 WARN akka.remote.ReliableDeliverySupervisor - 
Association with remote system 
[akka.tcp://flink@flink-taskmanager-6cf55db87b-5x9sd:6122] has failed, address 
is now gated for [50] ms. Reason: [Association failed with 
[akka.tcp://flink@flink-taskmanager-6cf55db87b-5x9sd:6122]] Caused by: 
[flink-taskmanager-6cf55db87b-5x9sd: Name or service not known]
          2018-12-08 07:09:13,601 WARN akka.remote.ReliableDeliverySupervisor - 
Association with remote system 
[akka.tcp://flink@flink-taskmanager-6cf55db87b-5x9sd:6122] has failed, address 
is now gated for [50] ms. Reason: [Association failed with 
[akka.tcp://flink@flink-taskmanager-6cf55db87b-5x9sd:6122]] Caused by: 
[flink-taskmanager-6cf55db87b-5x9sd]
          2018-12-08 07:09:23,605 WARN akka.remote.ReliableDeliverySupervisor - 
Association with remote system 
[akka.tcp://flink@flink-taskmanager-6cf55db87b-5x9sd:6122] has failed, address 
is now gated for [50] ms. Reason: [Association failed with 
[akka.tcp://flink@flink-taskmanager-6cf55db87b-5x9sd:6122]] Caused by: 
[flink-taskmanager-6cf55db87b-5x9sd: Name or service not known]
          2018-12-08 07:09:23,629 INFO 
org.apache.flink.runtime.resourcemanager.StandaloneResourceManager - The 
heartbeat of TaskManager with id 231a4d51d784b397cc4c5f49559b92bf timed out.





Regards,
Abhi Thakur

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