The pull request is here: https://github.com/apache/incubator-beam/pull/69
I'll merge it after the tests have passed and it has been reviewed. On Wed, Mar 23, 2016 at 3:12 PM, Maximilian Michels <[email protected]> wrote: > Hi William, > > I started working on a fix and better testing of the > UnboundedSourceWrapper. I'll get back to you shortly with a pull > request that we should be able to merge soon. > > - Max > > On Wed, Mar 23, 2016 at 1:33 PM, Aljoscha Krettek <[email protected]> wrote: >> Hi, >> as far as I can see from a quick glance the problem is that >> UnboundedSourceWrapper stores an instance of Reader that it gets from the >> Source. The Reader is not Serializable while the UnboundedSource is. I think >> the Reader should be initialized when actually running the source, in the >> run() method. >> >> Cheers, >> Aljoscha >>> On 23 Mar 2016, at 13:07, William McCarthy <[email protected]> >>> wrote: >>> >>> The first stack trace was from the latest runner, yes. I’ve pulled the very >>> latest, just now, and still get the same thing. >>> >>> When I write ‘pulled the very latest’, here’s what I mean (all of the >>> following commands, except the latest, finished with success): >>> >>> $ cd incubator-beam >>> $ git pull >>> …some output, then success >>> $ git branch >>> * master >>> $ mvn -DskipTests clean install >>> …some output, then success >>> $ cd <my project> >>> $ mvn -DskipTests clean install >>> …some output, then success >>> $ <command as output below> >>> >>> Bill >>> >>>> On Mar 22, 2016, at 5:29 AM, Maximilian Michels <[email protected]> wrote: >>>> >>>> Hi William, >>>> >>>> Is the first stack trace from the latest master? Using only the simple >>>> class name of the Runner should actually work now. I've also added a >>>> test to explicitly test that. >>>> >>>> The latter error, as Aljoscha pointed out, this due to batch >>>> execution. Perhaps we could make it explicit during startup which mode >>>> we're executing in. File a JIRA issue for that: >>>> https://issues.apache.org/jira/browse/BEAM-139 >>>> >>>> - Max >>>> >>>> On Tue, Mar 22, 2016 at 10:00 AM, Aljoscha Krettek <[email protected]> >>>> wrote: >>>>> Hi, >>>>> for Flink the runner can internally either translate to a batch job or a >>>>> streaming job. Unbounded sources are not supported when running in batch >>>>> mode so you have to somehow specify that you want to have streaming mode. >>>>> StreamingOptions has method setStreaming, maybe you can specify >>>>> “—streaming true” on the command line to set that flag. >>>>> >>>>> Cheers, >>>>> Aljoscha >>>>>> On 21 Mar 2016, at 23:39, William McCarthy <[email protected]> >>>>>> wrote: >>>>>> >>>>>> I’ve attempted to run the TopHashtagsExample again, using both >>>>>> ‘FlinkPipelineRunner’ and it's fully qualified name. Both bomb out, >>>>>> though the latter gets further. I hope this helps, here is the output of >>>>>> both: >>>>>> >>>>>> $ flink run -c >>>>>> com.google.cloud.dataflow.contrib.kafka.examples.TopHashtagsExample >>>>>> target/beam-1.0-SNAPSHOT.jar --runner=FlinkPipelineRunner >>>>>> --bootstrapServers=cl-pu4p:9092 --topics=test_in --outputTopic=test_out >>>>>> >>>>>> ------------------------------------------------------------ >>>>>> The program finished with the following exception: >>>>>> >>>>>> org.apache.flink.client.program.ProgramInvocationException: The main >>>>>> method caused an error. >>>>>> at >>>>>> org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:520) >>>>>> at >>>>>> org.apache.flink.client.program.PackagedProgram.invokeInteractiveModeForExecution(PackagedProgram.java:403) >>>>>> at >>>>>> org.apache.flink.client.program.Client.runBlocking(Client.java:248) >>>>>> at >>>>>> org.apache.flink.client.CliFrontend.executeProgramBlocking(CliFrontend.java:866) >>>>>> at org.apache.flink.client.CliFrontend.run(CliFrontend.java:333) >>>>>> at >>>>>> org.apache.flink.client.CliFrontend.parseParameters(CliFrontend.java:1189) >>>>>> at org.apache.flink.client.CliFrontend.main(CliFrontend.java:1239) >>>>>> Caused by: java.lang.IllegalArgumentException: Unknown 'runner' >>>>>> specified 'FlinkPipelineRunner', supported pipeline runners >>>>>> [BlockingDataflowPipelineRunner, DataflowPipelineRunner, >>>>>> DirectPipelineRunner] >>>>>> at >>>>>> com.google.cloud.dataflow.sdk.options.PipelineOptionsFactory.parseObjects(PipelineOptionsFactory.java:1486) >>>>>> at >>>>>> com.google.cloud.dataflow.sdk.options.PipelineOptionsFactory.access$400(PipelineOptionsFactory.java:101) >>>>>> at >>>>>> com.google.cloud.dataflow.sdk.options.PipelineOptionsFactory$Builder.as(PipelineOptionsFactory.java:286) >>>>>> at >>>>>> com.google.cloud.dataflow.contrib.kafka.examples.TopHashtagsExample.main(TopHashtagsExample.java:117) >>>>>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) >>>>>> at >>>>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) >>>>>> at >>>>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) >>>>>> at java.lang.reflect.Method.invoke(Method.java:498) >>>>>> at >>>>>> org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:505) >>>>>> ... 6 more >>>>>> Caused by: java.lang.ClassNotFoundException: FlinkPipelineRunner >>>>>> at java.net.URLClassLoader.findClass(URLClassLoader.java:381) >>>>>> at java.lang.ClassLoader.loadClass(ClassLoader.java:424) >>>>>> at java.lang.ClassLoader.loadClass(ClassLoader.java:357) >>>>>> at java.lang.Class.forName0(Native Method) >>>>>> at java.lang.Class.forName(Class.java:264) >>>>>> at >>>>>> com.google.cloud.dataflow.sdk.options.PipelineOptionsFactory.parseObjects(PipelineOptionsFactory.java:1473) >>>>>> ... 14 more >>>>>> >>>>>> >>>>>> $ flink run -c >>>>>> com.google.cloud.dataflow.contrib.kafka.examples.TopHashtagsExample >>>>>> target/beam-1.0-SNAPSHOT.jar >>>>>> --runner=org.apache.beam.runners.flink.FlinkPipelineRunner >>>>>> --bootstrapServers=cl-pu4p:9092 --topics=test_in --outputTopic=test_out >>>>>> >>>>>> ------------------------------------------------------------ >>>>>> The program finished with the following exception: >>>>>> >>>>>> org.apache.flink.client.program.ProgramInvocationException: The main >>>>>> method caused an error. >>>>>> at >>>>>> org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:520) >>>>>> at >>>>>> org.apache.flink.client.program.PackagedProgram.invokeInteractiveModeForExecution(PackagedProgram.java:403) >>>>>> at >>>>>> org.apache.flink.client.program.Client.runBlocking(Client.java:248) >>>>>> at >>>>>> org.apache.flink.client.CliFrontend.executeProgramBlocking(CliFrontend.java:866) >>>>>> at org.apache.flink.client.CliFrontend.run(CliFrontend.java:333) >>>>>> at >>>>>> org.apache.flink.client.CliFrontend.parseParameters(CliFrontend.java:1189) >>>>>> at org.apache.flink.client.CliFrontend.main(CliFrontend.java:1239) >>>>>> Caused by: java.lang.UnsupportedOperationException: The transform >>>>>> Read(UnboundedKafkaSource) is currently not supported. >>>>>> at >>>>>> org.apache.beam.runners.flink.translation.FlinkBatchPipelineTranslator.visitTransform(FlinkBatchPipelineTranslator.java:111) >>>>>> at >>>>>> com.google.cloud.dataflow.sdk.runners.TransformTreeNode.visit(TransformTreeNode.java:219) >>>>>> at >>>>>> com.google.cloud.dataflow.sdk.runners.TransformTreeNode.visit(TransformTreeNode.java:215) >>>>>> at >>>>>> com.google.cloud.dataflow.sdk.runners.TransformTreeNode.visit(TransformTreeNode.java:215) >>>>>> at >>>>>> com.google.cloud.dataflow.sdk.runners.TransformHierarchy.visit(TransformHierarchy.java:102) >>>>>> at >>>>>> com.google.cloud.dataflow.sdk.Pipeline.traverseTopologically(Pipeline.java:259) >>>>>> at >>>>>> org.apache.beam.runners.flink.translation.FlinkPipelineTranslator.translate(FlinkPipelineTranslator.java:34) >>>>>> at >>>>>> org.apache.beam.runners.flink.FlinkPipelineExecutionEnvironment.translate(FlinkPipelineExecutionEnvironment.java:130) >>>>>> at >>>>>> org.apache.beam.runners.flink.FlinkPipelineRunner.run(FlinkPipelineRunner.java:109) >>>>>> at >>>>>> org.apache.beam.runners.flink.FlinkPipelineRunner.run(FlinkPipelineRunner.java:50) >>>>>> at com.google.cloud.dataflow.sdk.Pipeline.run(Pipeline.java:180) >>>>>> at >>>>>> com.google.cloud.dataflow.contrib.kafka.examples.TopHashtagsExample.main(TopHashtagsExample.java:140) >>>>>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) >>>>>> at >>>>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) >>>>>> at >>>>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) >>>>>> at java.lang.reflect.Method.invoke(Method.java:498) >>>>>> at >>>>>> org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:505) >>>>>> ... 6 more >>>>>> >>>>>> >>>>>>> On Mar 21, 2016, at 12:23 PM, Raghu Angadi <[email protected]> wrote: >>>>>>> >>>>>>> Thanks Max. >>>>>>> >>>>>>> Bill McCarthy, >>>>>>> I know you are unblocked and KafkaWriter is good enough. Please try >>>>>>> KafkaIO source from my branch with Flink runner if you get a chance. >>>>>>> >>>>>>> thanks, >>>>>>> Raghu. >>>>>>> >>>>>>> On Mon, Mar 21, 2016 at 6:54 AM, Jean-Baptiste Onofré >>>>>>> <[email protected]> wrote: >>>>>>> Thanks for the update Max ! >>>>>>> >>>>>>> Regards >>>>>>> JB >>>>>>> >>>>>>> >>>>>>> On 03/21/2016 02:39 PM, Maximilian Michels wrote: >>>>>>> FYI: The Runner registration has been fixed. The Flink runner >>>>>>> explicitly registers as of [1]. Also, the SDK tries to look up the >>>>>>> PipelineRunner class in case it has not been registered [2]. >>>>>>> >>>>>>> [1] https://github.com/apache/incubator-beam/pull/40 >>>>>>> [2] https://github.com/apache/incubator-beam/pull/61 >>>>>>> >>>>>>> On Sat, Mar 19, 2016 at 6:43 PM, Maximilian Michels <[email protected]> >>>>>>> wrote: >>>>>>> Great to see such a lively discussion here. >>>>>>> >>>>>>> I think we'll support sinks through the Write interface (like in >>>>>>> batched execution) and also have a dedicated wrapper for the Flink >>>>>>> sinks. This is a very pressing but easy to solve issue of the Flink >>>>>>> runner. Expect it to be in next week. >>>>>>> >>>>>>> Also, the proper registration of the runner is about to to be merged. >>>>>>> We just need an ok from the contributor to merge the changes. >>>>>>> >>>>>>> Best, >>>>>>> Max >>>>>>> >>>>>>> On Sat, Mar 19, 2016 at 12:42 AM, Dan Halperin <[email protected]> >>>>>>> wrote: >>>>>>> Thanks Bill! >>>>>>> >>>>>>> Filed https://issues.apache.org/jira/browse/BEAM-136, but I'm glad it's >>>>>>> not >>>>>>> blocking you! >>>>>>> >>>>>>> On Fri, Mar 18, 2016 at 4:04 PM, William McCarthy >>>>>>> <[email protected]> wrote: >>>>>>> >>>>>>> I tried that, but still no dice: Just to be clear, it’s not a blocker >>>>>>> for >>>>>>> me, given that I have my example running, but for your information the >>>>>>> exception is below. >>>>>>> >>>>>>> I’ll watch the commit log on the beam incubator and look forward to >>>>>>> deleting my copy of Raghu’s contributions when they’re merger to master. >>>>>>> >>>>>>> Thanks again for everyone’s help, >>>>>>> >>>>>>> Bill >>>>>>> >>>>>>> >>>>>>> Command followed by exception: >>>>>>> >>>>>>> $ flink run -c >>>>>>> com.google.cloud.dataflow.contrib.kafka.examples.TopHashtagsExample >>>>>>> target/beam-1.0-SNAPSHOT.jar >>>>>>> --runner=org.apache.beam.runners.flink.FlinkPipelineRunner >>>>>>> --bootstrapServers=cl-pu4p:9092 --topics=test_in --outputTopic=test_out >>>>>>> >>>>>>> ------------------------------------------------------------ >>>>>>> The program finished with the following exception: >>>>>>> >>>>>>> org.apache.flink.client.program.ProgramInvocationException: The main >>>>>>> method caused an error. >>>>>>> at >>>>>>> org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:520) >>>>>>> at >>>>>>> org.apache.flink.client.program.PackagedProgram.invokeInteractiveModeForExecution(PackagedProgram.java:403) >>>>>>> at org.apache.flink.client.program.Client.runBlocking(Client.java:248) >>>>>>> at >>>>>>> org.apache.flink.client.CliFrontend.executeProgramBlocking(CliFrontend.java:866) >>>>>>> at org.apache.flink.client.CliFrontend.run(CliFrontend.java:333) >>>>>>> at >>>>>>> org.apache.flink.client.CliFrontend.parseParameters(CliFrontend.java:1189) >>>>>>> at org.apache.flink.client.CliFrontend.main(CliFrontend.java:1239) >>>>>>> Caused by: java.lang.IllegalArgumentException: Unknown 'runner' >>>>>>> specified >>>>>>> 'org.apache.beam.runners.flink.FlinkPipelineRunner', supported pipeline >>>>>>> runners [BlockingDataflowPipelineRunner, DataflowPipelineRunner, >>>>>>> DirectPipelineRunner] >>>>>>> at >>>>>>> com.google.cloud.dataflow.sdk.repackaged.com.google.common.base.Preconditions.checkArgument(Preconditions.java:146) >>>>>>> at >>>>>>> com.google.cloud.dataflow.sdk.options.PipelineOptionsFactory.parseObjects(PipelineOptionsFactory.java:1445) >>>>>>> at >>>>>>> com.google.cloud.dataflow.sdk.options.PipelineOptionsFactory.access$400(PipelineOptionsFactory.java:99) >>>>>>> at >>>>>>> com.google.cloud.dataflow.sdk.options.PipelineOptionsFactory$Builder.as(PipelineOptionsFactory.java:284) >>>>>>> at >>>>>>> com.google.cloud.dataflow.contrib.kafka.examples.TopHashtagsExample.main(TopHashtagsExample.java:117) >>>>>>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) >>>>>>> at >>>>>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) >>>>>>> at >>>>>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) >>>>>>> at java.lang.reflect.Method.invoke(Method.java:498) >>>>>>> at >>>>>>> org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:505) >>>>>>> ... 6 more >>>>>>> >>>>>>> On Mar 18, 2016, at 5:35 PM, Thomas Groh <[email protected]> wrote: >>>>>>> >>>>>>> I don't believe the FlinkPipelineRunner is registered the same way the >>>>>>> Dataflow & Direct Pipeline runners are registered; using >>>>>>> org.apache.beam.runners.flink.FlinkPipelineRunner should work >>>>>>> >>>>>>> On Fri, Mar 18, 2016 at 2:10 PM, William McCarthy >>>>>>> <[email protected]> wrote: >>>>>>> >>>>>>> Thanks Dan, >>>>>>> >>>>>>> I tried that, but getting the below. Note that the jar contains the >>>>>>> FlinkPipelineRunner. >>>>>>> >>>>>>> >>>>>>> >>>>>>> % jar -tf target/beam-1.0-SNAPSHOT.jar | grep FlinkPipeline >>>>>>> org/apache/beam/runners/flink/FlinkPipelineRunner.class >>>>>>> org/apache/beam/runners/flink/FlinkPipelineExecutionEnvironment.class >>>>>>> org/apache/beam/runners/flink/FlinkPipelineOptions.class >>>>>>> org/apache/beam/runners/flink/translation/FlinkPipelineTranslator.class >>>>>>> >>>>>>> % flink run -c >>>>>>> com.google.cloud.dataflow.contrib.kafka.examples.TopHashtagsExample >>>>>>> target/beam-1.0-SNAPSHOT.jar --runner=FlinkPipelineRunner >>>>>>> --bootstrapServers=cl-pu4p:9092 --topics=test_in --outputTopic=test_out >>>>>>> >>>>>>> ------------------------------------------------------------ >>>>>>> The program finished with the following exception: >>>>>>> >>>>>>> org.apache.flink.client.program.ProgramInvocationException: The main >>>>>>> method caused an error. >>>>>>> at >>>>>>> org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:520) >>>>>>> at >>>>>>> org.apache.flink.client.program.PackagedProgram.invokeInteractiveModeForExecution(PackagedProgram.java:403) >>>>>>> at org.apache.flink.client.program.Client.runBlocking(Client.java:248) >>>>>>> at >>>>>>> org.apache.flink.client.CliFrontend.executeProgramBlocking(CliFrontend.java:866) >>>>>>> at org.apache.flink.client.CliFrontend.run(CliFrontend.java:333) >>>>>>> at >>>>>>> org.apache.flink.client.CliFrontend.parseParameters(CliFrontend.java:1189) >>>>>>> at org.apache.flink.client.CliFrontend.main(CliFrontend.java:1239) >>>>>>> Caused by: java.lang.IllegalArgumentException: Unknown 'runner' >>>>>>> specified >>>>>>> 'FlinkPipelineRunner', supported pipeline runners >>>>>>> [BlockingDataflowPipelineRunner, DataflowPipelineRunner, >>>>>>> DirectPipelineRunner] >>>>>>> at >>>>>>> com.google.cloud.dataflow.sdk.repackaged.com.google.common.base.Preconditions.checkArgument(Preconditions.java:146) >>>>>>> at >>>>>>> com.google.cloud.dataflow.sdk.options.PipelineOptionsFactory.parseObjects(PipelineOptionsFactory.java:1445) >>>>>>> at >>>>>>> com.google.cloud.dataflow.sdk.options.PipelineOptionsFactory.access$400(PipelineOptionsFactory.java:99) >>>>>>> at >>>>>>> com.google.cloud.dataflow.sdk.options.PipelineOptionsFactory$Builder.as(PipelineOptionsFactory.java:284) >>>>>>> at >>>>>>> com.google.cloud.dataflow.contrib.kafka.examples.TopHashtagsExample.main(TopHashtagsExample.java:117) >>>>>>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) >>>>>>> at >>>>>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) >>>>>>> at >>>>>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) >>>>>>> at java.lang.reflect.Method.invoke(Method.java:498) >>>>>>> at >>>>>>> org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:505) >>>>>>> ... 6 more >>>>>>> >>>>>>> >>>>>>> >>>>>>> On Mar 18, 2016, at 5:00 PM, Dan Halperin <[email protected]> wrote: >>>>>>> >>>>>>> Thanks for catching that, Aljoscha! >>>>>>> >>>>>>> Note that the Flink runner should be available via a command-line option >>>>>>> as well: --runner=FlinkPipelineRunner. >>>>>>> >>>>>>> The list of valid values for that flag is computed by walking the >>>>>>> classpath at runtime, so as long as the Flink jar is present it'll work. >>>>>>> >>>>>>> On Fri, Mar 18, 2016 at 1:21 PM, Aljoscha Krettek <[email protected]> >>>>>>> wrote: >>>>>>> >>>>>>> Hi, >>>>>>> looks like the example is being executed with the DirectPipelineRunner >>>>>>> which does not seem to be able to cope with UnboundedSource. You need >>>>>>> to set >>>>>>> the runner to the FlinkRunner in the example code as described here: >>>>>>> https://github.com/apache/incubator-beam/tree/master/runners/flink#executing-an-example >>>>>>> >>>>>>> The Flink runner should be able to deal with UnboundedSource but has the >>>>>>> limitation that sources are always parallelism=1 (this is being worked >>>>>>> on, >>>>>>> however). >>>>>>> >>>>>>> Cheers, >>>>>>> Aljoscha >>>>>>> On 18 Mar 2016, at 20:56, Dan Halperin <[email protected]> wrote: >>>>>>> >>>>>>> Looks like the Flink runner may not yet support arbitrary code written >>>>>>> with the UnboundedSource API. That is, it looks like the Flink runner >>>>>>> expects the sources to get translated away. >>>>>>> >>>>>>> Max? >>>>>>> >>>>>>> Dan >>>>>>> >>>>>>> On Fri, Mar 18, 2016 at 12:20 PM, William McCarthy >>>>>>> <[email protected]> wrote: >>>>>>> Thanks Raghu, >>>>>>> >>>>>>> When I try to run it on flink using the incubator-beam code, i.e. >>>>>>> >>>>>>> flink run -c >>>>>>> com.google.cloud.dataflow.contrib.kafka.examples.TopHashtagsExample >>>>>>> target/beam-1.0-SNAPSHOT.jar --bootstrapServers=cl-pu4p:9092 >>>>>>> --topics=test_in --outputTopic=test_out >>>>>>> >>>>>>> I get this: >>>>>>> >>>>>>> org.apache.flink.client.program.ProgramInvocationException: The main >>>>>>> method caused an error. >>>>>>> at >>>>>>> org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:520) >>>>>>> at >>>>>>> org.apache.flink.client.program.PackagedProgram.invokeInteractiveModeForExecution(PackagedProgram.java:403) >>>>>>> at >>>>>>> org.apache.flink.client.program.Client.runBlocking(Client.java:248) >>>>>>> at >>>>>>> org.apache.flink.client.CliFrontend.executeProgramBlocking(CliFrontend.java:866) >>>>>>> at org.apache.flink.client.CliFrontend.run(CliFrontend.java:333) >>>>>>> at >>>>>>> org.apache.flink.client.CliFrontend.parseParameters(CliFrontend.java:1189) >>>>>>> at >>>>>>> org.apache.flink.client.CliFrontend.main(CliFrontend.java:1239) >>>>>>> Caused by: java.lang.IllegalStateException: no evaluator registered >>>>>>> for Read(UnboundedKafkaSource) >>>>>>> at >>>>>>> com.google.cloud.dataflow.sdk.runners.DirectPipelineRunner$Evaluator.visitTransform(DirectPipelineRunner.java:852) >>>>>>> at >>>>>>> com.google.cloud.dataflow.sdk.runners.TransformTreeNode.visit(TransformTreeNode.java:219) >>>>>>> at >>>>>>> com.google.cloud.dataflow.sdk.runners.TransformTreeNode.visit(TransformTreeNode.java:215) >>>>>>> at >>>>>>> com.google.cloud.dataflow.sdk.runners.TransformTreeNode.visit(TransformTreeNode.java:215) >>>>>>> at >>>>>>> com.google.cloud.dataflow.sdk.runners.TransformHierarchy.visit(TransformHierarchy.java:102) >>>>>>> at >>>>>>> com.google.cloud.dataflow.sdk.Pipeline.traverseTopologically(Pipeline.java:259) >>>>>>> at >>>>>>> com.google.cloud.dataflow.sdk.runners.DirectPipelineRunner$Evaluator.run(DirectPipelineRunner.java:814) >>>>>>> at >>>>>>> com.google.cloud.dataflow.sdk.runners.DirectPipelineRunner.run(DirectPipelineRunner.java:526) >>>>>>> at >>>>>>> com.google.cloud.dataflow.sdk.runners.DirectPipelineRunner.run(DirectPipelineRunner.java:96) >>>>>>> at com.google.cloud.dataflow.sdk.Pipeline.run(Pipeline.java:180) >>>>>>> at >>>>>>> com.google.cloud.dataflow.contrib.kafka.examples.TopHashtagsExample.main(TopHashtagsExample.java:140) >>>>>>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) >>>>>>> at >>>>>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) >>>>>>> at >>>>>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) >>>>>>> at java.lang.reflect.Method.invoke(Method.java:498) >>>>>>> at >>>>>>> org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:505) >>>>>>> ... 6 more >>>>>>> >>>>>>> Any ideas? >>>>>>> >>>>>>> Bill >>>>>>> >>>>>>> On Mar 18, 2016, at 2:47 PM, Raghu Angadi <[email protected]> wrote: >>>>>>> >>>>>>> Thanks for trying it. >>>>>>> >>>>>>> I fixed the CheckStyle error (not sure why my build is not failing). >>>>>>> Let me know if you see any issues running with Beam. I haven't tried >>>>>>> it. I >>>>>>> should. In fact Daniel Halperin says my patch should be against Beam.. >>>>>>> >>>>>>> Raghu. >>>>>>> >>>>>>> On Fri, Mar 18, 2016 at 11:22 AM, William McCarthy >>>>>>> <[email protected]> wrote: >>>>>>> Thanks JB, Emanuele, Kostas & Raghu, especially Kostas and Raghu for >>>>>>> pointing me to working code. >>>>>>> >>>>>>> I’m in the middle of a hack day at the moment, so the speed of your >>>>>>> responses has been very welcome. >>>>>>> >>>>>>> In the first instance, I’ll try using your changes, Raghu. I’ve >>>>>>> cloned your repo, switched to the kafka branch and built both >>>>>>> contrib/kafka >>>>>>> and contrib/examples/kafka. The contrib/kafka initially failed with a >>>>>>> CheckStyle error >>>>>>> (/Users/bill/dev/DataflowJavaSDK/contrib/kafka/src/main/java/com/google/cloud/dataflow/contrib/kafka/KafkaIO.java:683:12: >>>>>>> 'private' modifier out of order with the JLS suggestions)… I’ve fixed >>>>>>> that >>>>>>> in my local clone and now it’s building fine. I hope to be able to run >>>>>>> your >>>>>>> contrib unchanged on top of the incubator-beam codebase, which will be >>>>>>> what >>>>>>> I attempt to do now. >>>>>>> >>>>>>> Thanks again to all, for your swift help. >>>>>>> >>>>>>> Bill >>>>>>> >>>>>>> On Mar 18, 2016, at 12:55 PM, Raghu Angadi <[email protected]> >>>>>>> wrote: >>>>>>> >>>>>>> Hi Bill, >>>>>>> >>>>>>> We have fairly well tested patch for KafkaIO (pr #121). It will be >>>>>>> merged soon. The example there keeps track of top hashtags in 10 minute >>>>>>> sliding window and writes the results to another Kafka topic. Please >>>>>>> try it >>>>>>> if you can. It is well tested on Google Cloud Dataflow. I have not run >>>>>>> it >>>>>>> using Flink runner. >>>>>>> >>>>>>> Raghu. >>>>>>> >>>>>>> On Fri, Mar 18, 2016 at 9:46 AM, Kostas Kloudas >>>>>>> <[email protected]> wrote: >>>>>>> Hello Bill, >>>>>>> >>>>>>> This is a known limitation of the Flink Runner. >>>>>>> There is a JIRA issue for that >>>>>>> https://issues.apache.org/jira/browse/BEAM-127 >>>>>>> >>>>>>> A wrapper for Flink sinks will come soon and as Beam evolves, >>>>>>> a more Beam-y solution will come as well. >>>>>>> >>>>>>> Kostas >>>>>>> On Mar 18, 2016, at 5:23 PM, William McCarthy >>>>>>> <[email protected]> wrote: >>>>>>> >>>>>>> Hi, >>>>>>> >>>>>>> I’m trying to write a proof-of-concept which takes messages from >>>>>>> Kafka, transforms them using Beam on Flink, then pushes the results >>>>>>> onto a >>>>>>> different Kafka topic. >>>>>>> >>>>>>> I’ve used the KafkaWindowedWordCountExample as a starting point, >>>>>>> and that’s doing the first part of what I want to do, but it outputs to >>>>>>> text >>>>>>> files as opposed to Kafka. FlinkKafkaProducer08 looks promising, but I >>>>>>> can’t >>>>>>> figure out how to plug it into the pipeline. I was thinking that it >>>>>>> would be >>>>>>> wrapped with an UnboundedFlinkSink, or some such, but that doesn’t seem >>>>>>> to >>>>>>> exist. >>>>>>> >>>>>>> Any advice or thoughts on what I’m trying to do? >>>>>>> >>>>>>> I’m running the latest incubator-beam (as of last night from >>>>>>> Github), Flink 1.0.0 in cluster mode and Kafka 0.9.0.1, all on Google >>>>>>> Compute Engine (Debian Jessie). >>>>>>> >>>>>>> Thanks, >>>>>>> >>>>>>> Bill McCarthy >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> -- >>>>>>> Jean-Baptiste Onofré >>>>>>> [email protected] >>>>>>> http://blog.nanthrax.net >>>>>>> Talend - http://www.talend.com >>>>>>> >>>>>> >>>>> >>> >>
