问题
I tried to stop a job through flink stop
flink stop [jobid]
However the CLI throws error and does not allow me to stop the job. I could cancel it. What could be the reason here?
Stopping job c7196bb1d21d679efed73770a4e4f9ed.
------------------------------------------------------------ The program finished with the following exception:
org.apache.flink.util.FlinkException: Could not stop the job c7196bb1d21d679efed73770a4e4f9ed. at org.apache.flink.client.cli.CliFrontend.lambda$stop$5(CliFrontend.java:557) at org.apache.flink.client.cli.CliFrontend.runClusterAction(CliFrontend.java:988) at org.apache.flink.client.cli.CliFrontend.stop(CliFrontend.java:550) at org.apache.flink.client.cli.CliFrontend.parseParameters(CliFrontend.java:1065) at org.apache.flink.client.cli.CliFrontend.lambda$main$11(CliFrontend.java:1129) at org.apache.flink.runtime.security.NoOpSecurityContext.runSecured(NoOpSecurityContext.java:30) at org.apache.flink.client.cli.CliFrontend.main(CliFrontend.java:1129) Caused by: java.util.concurrent.ExecutionException: org.apache.flink.runtime.rest.util.RestClientException: [Job termination (STOP) failed: This job is not stoppable.] at java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:357) at java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1915) at org.apache.flink.client.program.rest.RestClusterClient.stop(RestClusterClient.java:392) at org.apache.flink.client.cli.CliFrontend.lambda$stop$5(CliFrontend.java:555) ... 6 more Caused by: org.apache.flink.runtime.rest.util.RestClientException: [Job termination (STOP) failed: This job is not stoppable.] at org.apache.flink.runtime.rest.RestClient.parseResponse(RestClient.java:351) at org.apache.flink.runtime.rest.RestClient.lambda$submitRequest$3(RestClient.java:335) at java.util.concurrent.CompletableFuture.uniCompose(CompletableFuture.java:952) at java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:926) at java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:442) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748)
回答1:
For a Flink job to be stoppable, all of its sources have to implement the Stoppable interface, and at this point it is still the case that very few do. Among the source connectors bundled with Flink, only the Storm SpoutWrapper, the TwitterSource, and the NifiSource support stop.
It may appear that you are meant to use stop, but for most purposes, the cancel command is more appropriate. The only conceivable benefit to stopping, as opposed to canceling, is that you might avoid lost or duplicated results. But if you are using connectors that implement the checkpointing interface, such as the Kafka connector, then it doesn't matter how you shutdown a job -- you can achieve exactly-once semantics regardless.
回答2:
I used cancel command to terminate the flink streming job.
>flink cancel [JobId]
>flink cancel 79045f661e3ac9b082f63726bfb61597
来源：https://stackoverflow.com/questions/53735318/flink-how-to-solve-error-this-job-is-not-stoppable