For "REST only client" I mean using only the REST API to interact with the Flink cluster, i.e. without creating any PackagedProgram and thus incurring into classpath problems. I've implemented a running job server that was using the REST API to upload the job jar and execute the run command but then I gave up because I was not able to run any code after env.execute..so I ended up using SSH to the remote server and using the CLI client. This has the limitation of not being able to get the job id and monitor the job status or get back exceptions when deploying the job. So now I was trying to explore this new way of submitting the job (that computes the jobGraph on the client side and submit it to the cluster).
On Fri, Oct 30, 2020 at 10:32 AM Chesnay Schepler <ches...@apache.org> wrote: > To clarify, if the job creation fails on the JM side, in 1.11 the job > submission will fail, in 1.12 it will succeed but the job will be in a > failed state. > > On 10/30/2020 10:23 AM, Chesnay Schepler wrote: > > 1) the job still reaches a failed state, which you can poll for, see 2) > 2) polling is your only way. > > What do you mean with "REST only client"? Do you mean a plain http client, > not something that Flink provides? > > On 10/30/2020 10:02 AM, Flavio Pompermaier wrote: > > Nothing to do also with IntelliJ..do you have any sample project I > can reuse to test the job submission to a cluster? > I can't really understand why the classes within the fat jar are not found > when generating the PackagedProgram. > Ideally, I'd prefer to use REST only client (so no need to build package > programs and introduce classpath problems..) but I have 2 questions: > > - I remember that when submitting jobs from REST there's no way to > detect failures in the job creation (like missing classes, classpath > problems, etc). Am I wrong? > - I'd like to monitor the progress of my batch job (for example I can > count the number of completed vertices wrt the total count of vertices). Is > there any suggested way to do that apart from polling? > > Best, > Flavio > > On Wed, Oct 28, 2020 at 12:19 PM Flavio Pompermaier <pomperma...@okkam.it> > wrote: > >> I'm runnin the code from Eclipse, the jar exists and it contains the >> classes Flink is not finding..maybe I can try to use IntelliJ in the >> afternoon >> >> On Wed, Oct 28, 2020 at 12:13 PM Chesnay Schepler <ches...@apache.org> >> wrote: >> >>> @Kostas: Ah, I missed that. >>> >>> @Flavio: the only alternative I can think your jar does not contain the >>> classes, or does not exist at all on the machine your application is run >>> on. >>> >>> On 10/28/2020 12:08 PM, Kostas Kloudas wrote: >>> > Hi all, >>> > >>> > I will have a look in the whole stack trace in a bit. >>> > >>> > @Chesnay Schepler I think that we are setting the correct classloader >>> > during jobgraph creation [1]. Is that what you mean? >>> > >>> > Cheers, >>> > Kostas >>> > >>> > [1] >>> https://github.com/apache/flink/blob/master/flink-clients/src/main/java/org/apache/flink/client/program/PackagedProgramUtils.java#L122 >>> > >>> > On Wed, Oct 28, 2020 at 11:02 AM Flavio Pompermaier >>> > <pomperma...@okkam.it> wrote: >>> >> Always the same problem. >>> >> >>> >> Caused by: java.lang.ClassNotFoundException: it.test.XXX >>> >> at java.base/java.net >>> .URLClassLoader.findClass(URLClassLoader.java:471) >>> >> at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:589) >>> >> at >>> org.apache.flink.util.FlinkUserCodeClassLoader.loadClassWithoutExceptionHandling(FlinkUserCodeClassLoader.java:61) >>> >> at >>> org.apache.flink.util.ChildFirstClassLoader.loadClassWithoutExceptionHandling(ChildFirstClassLoader.java:74) >>> >> at >>> org.apache.flink.util.FlinkUserCodeClassLoader.loadClass(FlinkUserCodeClassLoader.java:48) >>> >> at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522) >>> >> ... 10 more >>> >> >>> >> I've also tried with >>> >> >>> >> flinkConf.set(CoreOptions.CLASSLOADER_RESOLVE_ORDER, >>> "parent-first"); >>> >> >>> >> but nothing changes. >>> >> >>> >> On Wed, Oct 28, 2020 at 10:34 AM Chesnay Schepler <ches...@apache.org> >>> wrote: >>> >>> hmm..it appears as if PackagedProgramUtils#createJobGraph does some >>> things outside the usercode classlodaer (getPipelineFromProgram()), >>> specifically the call to the main method. >>> >>> >>> >>> @klou This seems like wrong behavior? >>> >>> >>> >>> @Flavio What you could try in the meantime is wrap the call to >>> createJobGraph like this: >>> >>> >>> >>> final ClassLoader contextClassLoader = >>> Thread.currentThread().getContextClassLoader(); >>> >>> try { >>> >>> >>> >>> Thread.currentThread().setContextClassLoader(packagedProgram.getUserCodeClassLoader()); >>> >>> // do tstuff >>> >>> } finally { >>> >>> Thread.currentThread().setContextClassLoader(contextClassLoader); >>> >>> } >>> >>> >>> >>> >>> >>> On 10/28/2020 10:12 AM, Flavio Pompermaier wrote: >>> >>> >>> >>> Any help here? How can I understand why the classes inside the jar >>> are not found when creating the PackagedProgram? >>> >>> >>> >>> On Tue, Oct 27, 2020 at 11:04 AM Flavio Pompermaier < >>> pomperma...@okkam.it> wrote: >>> >>>> In the logs I see that the jar is the classpath (I'm trying to >>> debug the program from the IDE)..isn'it? >>> >>>> >>> >>>> Classpath: [file:/tmp/job-bundle.jar] >>> >>>> ... >>> >>>> >>> >>>> Best, >>> >>>> Flavio >>> >>>> >>> >>>> On Tue, Oct 27, 2020 at 10:39 AM Chesnay Schepler < >>> ches...@apache.org> wrote: >>> >>>>> * your JobExecutor is _not_ putting it on the classpath. >>> >>>>> >>> >>>>> On 10/27/2020 10:36 AM, Chesnay Schepler wrote: >>> >>>>> >>> >>>>> Well it happens on the client before you even hit the >>> RestClusterClient, so I assume that either your jar is not packaged >>> correctly or you your JobExecutor is putting it on the classpath. >>> >>>>> >>> >>>>> On 10/27/2020 9:42 AM, Flavio Pompermaier wrote: >>> >>>>> >>> >>>>> Sure. Here it is (org.apache.flink.client.cli.JobExecutor is my >>> main class I'm trying to use as a client towards the Flink cluster - >>> session mode). >>> >>>>> it/test/MyOb is within the fat jar (/tmp/job-bundle.jar). >>> >>>>> >>> >>>>> The code of getBatchEnv is: >>> >>>>> >>> >>>>> @Deprecated >>> >>>>> public static BatchEnv getBatchEnv() { >>> >>>>> // TODO use the following when ready to convert from/to >>> datastream >>> >>>>> // return >>> getTableEnv(EnvironmentSettings.newInstance().inBatchMode().build()); >>> >>>>> ExecutionEnvironment env = >>> ExecutionEnvironment.getExecutionEnvironment(); >>> >>>>> BatchTableEnvironment ret = BatchTableEnvironment.create(env); >>> >>>>> customizeEnv(ret); >>> >>>>> return new BatchEnv(env, ret); >>> >>>>> } >>> >>>>> >>> >>>>> private static void customizeEnv(TableEnvironment ret) { >>> >>>>> final Configuration conf = ret.getConfig().getConfiguration(); >>> >>>>> // >>> conf.setInteger(ExecutionConfigOptions.TABLE_EXEC_RESOURCE_DEFAULT_PARALLELISM, >>> 2); >>> >>>>> conf.setString(CoreOptions.TMP_DIRS, FLINK_TEST_TMP_DIR); >>> >>>>> conf.setString(BlobServerOptions.STORAGE_DIRECTORY, >>> FLINK_TEST_TMP_DIR); >>> >>>>> // conf.setInteger(ConfigConstants.LOCAL_NUMBER_TASK_MANAGER, >>> 4); //NOSONAR >>> >>>>> // >>> conf.setFloat(ConfigConstants.TASK_MANAGER_MEMORY_FRACTION_KEY, >>> 0.4f);//NOSONAR >>> >>>>> // >>> conf.setLong(TaskManagerOptions.NETWORK_BUFFERS_MEMORY_MAX, 32768 * >>> 2);//NOSONAR >>> >>>>> // conf.setLong(TaskManagerOptions.TASK_CANCELLATION_TIMEOUT, >>> 32768 * 2);// NOSONAR >>> >>>>> conf.setLong(TaskManagerOptions.TASK_CANCELLATION_TIMEOUT, >>> 0);// NOSONAR >>> >>>>> conf.setString(AkkaOptions.ASK_TIMEOUT, "10 min");// NOSONAR >>> >>>>> conf.setString(AkkaOptions.TCP_TIMEOUT, "10 min");// NOSONAR >>> >>>>> conf.setString(AkkaOptions.STARTUP_TIMEOUT, "10 min");// >>> NOSONAR >>> >>>>> conf.set(ClientOptions.CLIENT_TIMEOUT, >>> Duration.ofMinutes(10));// NOSONAR >>> >>>>> final List<String> kryoSerializers = new ArrayList<>(); >>> >>>>> >>> kryoSerializers.add(getKryoSerializerConfigLine(DateTime.class, >>> JodaDateTimeSerializer.class)); >>> >>>>> >>> kryoSerializers.add(getKryoSerializerConfigLine(EntitonAtom.class, >>> TBaseSerializer.class)); >>> >>>>> >>> kryoSerializers.add(getKryoSerializerConfigLine(EntitonQuad.class, >>> TBaseSerializer.class)); >>> >>>>> conf.set(PipelineOptions.KRYO_DEFAULT_SERIALIZERS, >>> kryoSerializers); >>> >>>>> >>> >>>>> } >>> >>>>> >>> >>>>> Classpath: [file:/tmp/job-bundle.jar] >>> >>>>> >>> >>>>> System.out: (none) >>> >>>>> >>> >>>>> System.err: (none) >>> >>>>> at >>> org.apache.flink.client.program.PackagedProgramUtils.generateException(PackagedProgramUtils.java:245) >>> >>>>> at >>> org.apache.flink.client.program.PackagedProgramUtils.getPipelineFromProgram(PackagedProgramUtils.java:164) >>> >>>>> at >>> org.apache.flink.client.program.PackagedProgramUtils.createJobGraph(PackagedProgramUtils.java:77) >>> >>>>> at >>> org.apache.flink.client.program.PackagedProgramUtils.createJobGraph(PackagedProgramUtils.java:109) >>> >>>>> at >>> org.apache.flink.client.cli.JobExecutor.main(JobExecutor.java:42) >>> >>>>> Caused by: java.lang.NoClassDefFoundError: it/test/MyOb >>> >>>>> at >>> it.okkam.datalinks.flink.DatalinksExecutionEnvironment.customizeEnv(DatalinksExecutionEnvironment.java:116) >>> >>>>> at >>> it.okkam.datalinks.flink.DatalinksExecutionEnvironment.getBatchEnv(DatalinksExecutionEnvironment.java:95) >>> >>>>> at it.okkam.datalinks.flink.jobs >>> .EnsReconciliator.main(EnsReconciliator.java:73) >>> >>>>> at >>> java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native >>> Method) >>> >>>>> at >>> java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) >>> >>>>> at >>> java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) >>> >>>>> at java.base/java.lang.reflect.Method.invoke(Method.java:566) >>> >>>>> at >>> org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:288) >>> >>>>> at >>> org.apache.flink.client.program.PackagedProgram.invokeInteractiveModeForExecution(PackagedProgram.java:198) >>> >>>>> at >>> org.apache.flink.client.program.PackagedProgramUtils.getPipelineFromProgram(PackagedProgramUtils.java:150) >>> >>>>> ... 3 more >>> >>>>> Caused by: java.lang.ClassNotFoundException: it/test/MyOb >>> >>>>> at java.base/java.net >>> .URLClassLoader.findClass(URLClassLoader.java:471) >>> >>>>> at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:589) >>> >>>>> at >>> org.apache.flink.util.FlinkUserCodeClassLoader.loadClassWithoutExceptionHandling(FlinkUserCodeClassLoader.java:61) >>> >>>>> at >>> org.apache.flink.util.ChildFirstClassLoader.loadClassWithoutExceptionHandling(ChildFirstClassLoader.java:74) >>> >>>>> at >>> org.apache.flink.util.FlinkUserCodeClassLoader.loadClass(FlinkUserCodeClassLoader.java:48) >>> >>>>> at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522) >>> >>>>> ... 13 more >>> >>>>> >>> >>>>> On Tue, Oct 27, 2020 at 9:32 AM Robert Metzger < >>> rmetz...@apache.org> wrote: >>> >>>>>> Hi Flavio, >>> >>>>>> can you share the full stacktrace you are seeing? I'm wondering >>> if the error happens on the client or server side (among other questions I >>> have). >>> >>>>>> >>> >>>>>> On Mon, Oct 26, 2020 at 5:58 PM Flavio Pompermaier < >>> pomperma...@okkam.it> wrote: >>> >>>>>>> Hi to all, >>> >>>>>>> I was trying to use the RestClusterClient to submit my job to >>> the Flink cluster. >>> >>>>>>> However when I submit the job Flink cannot find the classes >>> contained in the "fat" jar..what should I do? Am I missing something in my >>> code? >>> >>>>>>> This is the current client code I'm testing: >>> >>>>>>> >>> >>>>>>> public static void main(String[] args) throws >>> MalformedURLException { >>> >>>>>>> final Configuration flinkConf = new Configuration(); >>> >>>>>>> flinkConf.set(RestOptions.ADDRESS, "localhost"); >>> >>>>>>> flinkConf.set(RestOptions.PORT, 8081); >>> >>>>>>> >>> >>>>>>> final File jarFile = new File("/tmp/job-bundle.jar"); >>> >>>>>>> final String jobClass = "it.flink.MyJob"; >>> >>>>>>> >>> >>>>>>> try { >>> >>>>>>> final RestClusterClient<StandaloneClusterId> client = >>> >>>>>>> new RestClusterClient<>(flinkConf, >>> StandaloneClusterId.getInstance()); >>> >>>>>>> >>> >>>>>>> final PackagedProgram packagedProgram = >>> PackagedProgram.newBuilder()// >>> >>>>>>> .setJarFile(jarFile)// >>> >>>>>>> // .setUserClassPaths(userClassPaths) >>> >>>>>>> >>> .setEntryPointClassName(jobClass).setConfiguration(flinkConf)// >>> >>>>>>> .build(); >>> >>>>>>> >>> >>>>>>> final JobGraph jobGraph = >>> >>>>>>> PackagedProgramUtils.createJobGraph(packagedProgram, >>> flinkConf, 1, true); >>> >>>>>>> >>> >>>>>>> final DetachedJobExecutionResult jobExecutionResult = >>> >>>>>>> >>> client.submitJob(jobGraph).thenApply(DetachedJobExecutionResult::new).get(); >>> >>>>>>> >>> >>>>>>> System.out.println(jobExecutionResult.getJobID()); >>> >>>>>>> } catch (Exception ex) { >>> >>>>>>> ex.printStackTrace(); >>> >>>>>>> System.exit(1); >>> >>>>>>> } >>> >>>>>>> } >>> >>>>>>> >>> >>>>>>> Best, >>> >>>>>>> Flavio >>> >>>>> >>> >>>>> >> >> > >
