I'm trying to upgrade our Flink cluster from 1.4.2 to 1.7.2
When I bring up the cluster, the task managers refuse to connect to the job managers with the following error.
2019-03-14 10:34:41,551 WARN akka.remote.ReliableDeliverySupervisor
- Association with remote system [akka.tcp://flink#cluster:22671] has failed, address is now gated for [50] ms. Reason: [Association failed with [akka.tcp://flink#cluster:22671]] Caused by: [cluster: Name or service not known]
Now, this works correctly if I add the following line into the /etc/hosts file.
x.x.x.x job-manager-address.com cluster
Why is Flink 1.7.2 connecting to JM using cluster in the address? Flink 1.4.2 used to have the job manager's address instead of the word cluster.
The jobmanager.sh script was being invoked with a second argument called cluster.
${Flink_HOME}/bin/jobmanager.sh start cluster
Prior to 1.5, the script expected an execution mode (local or cluster) but this is no longer the case. Invoking the script without the second argument solved this issue.
${Flink_HOME}/bin/jobmanager.sh start
http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/Flink-1-7-2-Task-Manager-not-able-to-connect-to-Job-Manager-td26707.html
https://github.com/apache/flink/commit/d61664ca64bcb82c4e8ddf03a2ed38fe8edafa98
https://github.com/apache/flink/blob/c6878aca6c5aeee46581b4d6744b31049db9de95/flink-dist/src/main/flink-bin/bin/jobmanager.sh#L21-L25
Related
My goal is to create a streaming pipeline to read data from Apache Kafka, process the data, and write back to it.
Because of security reasons, I want to avoid Docker and use Podman.
I have set up a minimal cluster via a docker-compose.yml with a jobmanager, taskmanager and a Python SDK harness worker. The SDK harness worker seems to get stuck when i try to execute a pipeline.
Running the pipeline (reading a multi-line .txt file and writing it back in a file) it gets transferred to the jobmanager and taskmanager correctly, but then goes idle. When I look in the pythonsdk container, the logs show the following message repeatedly:
2022/12/04 16:13:02 Starting worker pool 1: python -m
apache_beam.runners.worker.worker_pool_main --service_port=50000
--container_executable=/opt/apache/beam/boot
Starting worker with command ['/opt/apache/beam/boot', '--id=1-1',
'--logging_endpoint=localhost:45087',
'--artifact_endpoint=localhost:35323',
'--provision_endpoint=localhost:36435',
'--control_endpoint=localhost:33237']
2022/12/04 16:16:31 Failed to obtain provisioning information: failed to
dial server at localhost:36435
caused by:
context deadline exceeded
Here is a link to a test pipeline that was created:
Example on github
Environment:
Debian 11;
Podman;
Python 3.2.9;
apache-beam==2.38.0; and
podman-compose
The setup of the cluster defined in:
docker-compose.yml
1x flink-jobmanager (flink version 1.14)
1x flink-taskmanager
1x Python Harness SDK
I chose to create a SDK container manually because I don't have Docker installed and Flink fails when it tries to create a container
over Docker.
I suspect that I have made a mistake in the network setup or there are some configurations missing for the harness worker, but I could not figure out the problem. Any thoughts?
Crossposted in user mailing list of beam.apache.org
I am trying to use adaptive schedule with flink 1.14 to run flink job based on available resources instead of waiting for required parallelism (scaling) but I don't see flink is getting recognize adaptive schedule.
Ex: flink run -m yarn-cluster -ynm jobName -p 128 -D jobmanager.scheduler=Adaptive -D cluster.declarative-resource-management.enabled=true -c className JarName
Reference : https://nightlies.apache.org/flink/flink-docs-release-1.14/docs/deployment/elastic_scaling/
Caused by: java.util.concurrent.CompletionException: java.util.concurrent.CompletionException: org.apache.flink.runtime.jobmanager.scheduler.NoResourceAvailableException: Slot request bulk is not fulfillable! Could not allocate the required slot within slot request timeout
at org.apache.flink.runtime.scheduler.DefaultScheduler.lambda$assignResource$8(DefaultScheduler.java:515)
... 37 more
Caused by: java.util.concurrent.CompletionException: org.apache.flink.runtime.jobmanager.scheduler.NoResourceAvailableException: Slot request bulk is not fulfillable! Could not allocate the required slot within slot request timeout
at java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:292)
at java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:308)
at java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:607)
at java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:591)
... 35 more
Regards,
Madan
See the section of the docs describing Limitations of Elastic Scaling. In particular, this part, which explains that yarn is not supported:
Deployment is only supported as a standalone application deployment. Active resource providers (such as native Kubernetes, YARN) are explicitly not supported. Standalone session clusters are not supported either. The application deployment is limited to single job applications.
The only supported deployment options are Standalone in Application Mode (described on this page), Docker in Application Mode and Standalone Kubernetes Application Cluster.
I've just upgraded my flink from version 1.9.1 to 1.11.2 (using docker)
I have already many flink jobs running in version 1.9.1
When I try to upgrade to 1.11.1 and re run my job, it shows error.
2020-11-12 06:49:17,731 WARN org.apache.zookeeper.ClientCnxn []
- SASL configuration failed: javax.security.auth.login.LoginException: No JAAS configuration section named 'Client' was found in specified JAAS configuration file: '/tmp/jaas-1135609831848314731.conf'. Will continue connection to Zookeeper server without SASL authentication, if Zookeeper server allows it.
2020-11-12 06:49:17,739 INFO org.apache.zookeeper.ClientCnxn [] - Opening socket connection to server xxxxxx:2181
2020-11-12 06:49:17,741 ERROR org.apache.curator.ConnectionState [] - Authentication failed
And this is the error after deploying my flink job:
Caused by: java.lang.RuntimeException: API paths not defined
and also:
java.lang.NoSuchMethodError: org.apache.flink.api.common.state.OperatorStateStore.getSerializableListState(Ljava/lang/String;)Lorg/apache/flink/api/common/state/ListState;
Do I need to change every pom for my flink jobs?
Is there any work around without changing my source code?
Thanks
Yes, you do have to rebuild your Flink jobs whenever you update the Flink version being used to run them. The libraries you use should be from the same exact version used by the Job Manager and Task Managers.
If you are trying to automate deployments for a CI/CD pipeline, you could inject the version number into the pom.xml using an environment variable -- but doing things like that can make it hard to debug when things go wrong.
Getting the following flink job submission error,
#centos1 flink-1.10.0]$ ./bin/flink run -m 10.0.2.4:8081 ./examples/batch/WordCount.jar --input file:///storage/flink-1.10.0/test.txt --output file:///storage/flink-1.10.0/wordcount_out
Job has been submitted with JobID 33d489aee848401e08c425b053c854f9
------------------------------------------------------------
The program finished with the following exception:
org.apache.flink.client.program.ProgramInvocationException: The main method caused an error: org.apache.flink.runtime.rest.util.RestClientException: [org.apache.flink.runtime.rest.handler.RestHandlerException: org.apache.flink.runtime.messages.FlinkJobNotFoundException: Could not find Flink job (33d489aee848401e08c425b053c854f9)
....
Caused by: java.util.concurrent.CompletionException: org.apache.flink.runtime.messages.FlinkJobNotFoundException: Could not find Flink job (33d489aee848401e08c425b053c854f9)
Caused by: org.apache.flink.runtime.messages.FlinkJobNotFoundException: Could not find Flink job (33d489aee848401e08c425b053c854f9)
at org.apache.flink.runtime.dispatcher.Dispatcher.getJobMasterGatewayFuture(Dispatcher.java:776)
at org.apache.flink.runtime.dispatcher.Dispatcher.requestJobStatus(Dispatcher.java:505)
... 27 more
]
logs from the taskmanger nodes: saying the file not found.. Is the correct way of pointing files in a flink cluster setup.
2020-03-19 13:15:29,843 ERROR org.apache.flink.runtime.operators.BatchTask - Error in task code: CHAIN DataSource (at main(WordCount.java:69) (org.apache.flink.api.java.io.TextInputFormat)) -> FlatMap (FlatMap at main(WordCount.java:84)) -> Combine (SUM(1), at main(WordCount.java:87) (1/2)
java.io.IOException: Error opening the Input Split file:/storage/flink-1.10.0/test.txt [0,19]: /storage/flink-1.10.0/test.txt (No such file or directory)
at org.apache.flink.api.common.io.FileInputFormat.open(FileInputFormat.java:824)
at org.apache.flink.api.common.io.DelimitedInputFormat.open(DelimitedInputFormat.java:470)
how to troubleshoot the above error, what to check , very less clues in the flink logs
The reason why is happening is because you are submitting a job across a distributed cluster and the location you have specified is perhaps only accessible by Job manager or machine from where you have submitted your job. However, actual program and Job execution takes place in Task Manager. Better approach for this would be by specifying a location which is accessible by all the nodes, may be HDFS or NFS.
when i configure the flink-conf.yaml to collect metrics with the graphite plugin,
the most time only incomplete metrics are being sent. On the Taskmanager output multiple errors occur like:
2018-08-15 00:58:59,016 WARN org.apache.flink.runtime.metrics.MetricRegistryImpl - Error while registering metric.
java.lang.IllegalArgumentException: A metric named mycomputer.taskmanager.8ceab4c3dfbf9fc5fa2af0447f1373a1.State machine job.Source: Custom Source.0.numRecordsOut already exists
at com.codahale.metrics.MetricRegistry.register(MetricRegistry.java:91)
at org.apache.flink.dropwizard.ScheduledDropwizardReporter.notifyOfAddedMetric(ScheduledDropwizardReporter.java:131)
at org.apache.flink.runtime.metrics.MetricRegistryImpl.register(MetricRegistryImpl.java:329)
at org.apache.flink.runtime.metrics.groups.AbstractMetricGroup.addMetric(AbstractMetricGroup.java:379)
at org.apache.flink.runtime.metrics.groups.AbstractMetricGroup.counter(AbstractMetricGroup.java:312)
at org.apache.flink.runtime.metrics.groups.AbstractMetricGroup.counter(AbstractMetricGroup.java:302)
at org.apache.flink.runtime.metrics.groups.OperatorIOMetricGroup.<init>(OperatorIOMetricGroup.java:41)
at org.apache.flink.runtime.metrics.groups.OperatorMetricGroup.<init>(OperatorMetricGroup.java:48)
at org.apache.flink.runtime.metrics.groups.TaskMetricGroup.addOperator(TaskMetricGroup.java:146)
at org.apache.flink.streaming.api.operators.AbstractStreamOperator.setup(AbstractStreamOperator.java:174)
at org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator.setup(AbstractUdfStreamOperator.java:82)
at org.apache.flink.streaming.runtime.tasks.OperatorChain.<init>(OperatorChain.java:143)
at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:267)
at org.apache.flink.runtime.taskmanager.Task.run(Task.java:711)
at java.lang.Thread.run(Thread.java:748)
I've tried this on a completely freshly prepared flink-1.6.0 release with following config and the precompiled "State machine job" in the examples folder:
metrics.reporters: grph
metrics.reporter.grph.class: org.apache.flink.metrics.graphite.GraphiteReporter
metrics.reporter.grph.host: localhost
metrics.reporter.grph.port: 2003
metrics.reporter.grph.interval: 1 SECONDS
metrics.reporter.grph.protocol: TCP
I use the official graphite docker image (https://hub.docker.com/r/graphiteapp/docker-graphite-statsd/) that is running on the default configuration.
Has anybody an idea, how i can fix this issue?
Thank's and best regards
update
to exclude that a specific local setting is responsible for this behaviour, I repeated the process on a clean EC2 instance. There's exactly the same error here.
How to reproduce:
start EC2 t2.xlarge
installed java
download flink at https://www.apache.org/dyn/closer.lua/flink/flink-1.6.0/flink-1.6.0-bin-scala_2.11.tgz
added the flink-metrics-graphite-1.6.0.jar to lib
configured the flink-yaml.conf as mentioned in my previous post
./bin/start-cluster.sh
./bin/flink run examples/streaming/StateMachineExample.jar
I have not set up graphite in this case, because the error obviously already
occurs before.
After the job has been started you can view the error in the flink dashboard under Task Manager -> Logs