Hello Ufuk, I'm using EMR 4.4.0.
Thanks, Timur On Tue, Apr 5, 2016 at 2:18 AM, Ufuk Celebi <u...@apache.org> wrote: > Hey Timur, > > which EMR version are you using? > > – Ufuk > > On Tue, Apr 5, 2016 at 1:43 AM, Timur Fayruzov <timur.fairu...@gmail.com> > wrote: > > Thanks for the answer, Ken. > > > > My understanding is that file system selection is driven by the following > > sections in core-site.xml: > > <property> > > <name>fs.s3.impl</name> > > <!--<value>com.amazon.ws.emr.hadoop.fs.EmrFileSystem</value>--> <!-- > This > > was the original value --> > > <value>org.apache.hadoop.fs.s3native.NativeS3FileSystem</value> > > </property> > > > > <property> > > <name>fs.s3n.impl</name> > > <value>com.amazon.ws.emr.hadoop.fs.EmrFileSystem</value> > > </property> > > > > If I run the program using configuration above with s3n (and also > modifying > > credential keys to use s3n) it fails with the same error, but there is no > > "... opening key ..." logs. S3a seems to be not supported, it fails with > the > > following: > > Caused by: java.io.IOException: No file system found with scheme s3a, > > referenced in file URI 's3a://<my key>'. > > at org.apache.flink.core.fs.FileSystem.get(FileSystem.java:296) > > at org.apache.flink.core.fs.Path.getFileSystem(Path.java:311) > > at > > > org.apache.flink.api.common.io.FileInputFormat.createInputSplits(FileInputFormat.java:450) > > at > > > org.apache.flink.api.common.io.FileInputFormat.createInputSplits(FileInputFormat.java:57) > > at > > > org.apache.flink.runtime.executiongraph.ExecutionJobVertex.<init>(ExecutionJobVertex.java:156) > > ... 23 more > > > > I am puzzled by the fact that EMRFS is still apparently referenced > somewhere > > as an implementation for S3 protocol, I'm not able to locate where this > > configuration is set. > > > > > > On Mon, Apr 4, 2016 at 4:07 PM, Ken Krugler <kkrugler_li...@transpac.com > > > > wrote: > >> > >> Normally in Hadoop jobs you’d want to use s3n:// as the protocol, not > s3. > >> > >> Though EMR has some support for magically treating the s3 protocol as > s3n > >> (or maybe s3a now, with Hadoop 2.6 or later) > >> > >> What happens if you use s3n://<key info>/<path to file> for the --input > >> parameter? > >> > >> — Ken > >> > >> On Apr 4, 2016, at 2:51pm, Timur Fayruzov <timur.fairu...@gmail.com> > >> wrote: > >> > >> Hello, > >> > >> I'm trying to run a Flink WordCount job on an AWS EMR cluster. I > succeeded > >> with a three-step procedure: load data from S3 to cluster's HDFS, run > Flink > >> Job, unload outputs from HDFS to S3. > >> > >> However, ideally I'd like to read/write data directly from/to S3. I > >> followed the instructions here: > >> > https://ci.apache.org/projects/flink/flink-docs-release-1.0/apis/batch/connectors.html > , > >> more specifically I: > >> 1. Modified flink-conf to point to /etc/hadoop/conf > >> 2. Modified core-site.xml per link above (not clear why why it is not > >> using IAM, I had to provide AWS keys explicitly). > >> > >> Run the following command: > >> HADOOP_CONF_DIR=/etc/hadoop/conf flink-1.0.0/bin/flink run -m > yarn-cluster > >> -yn 1 -yjm 768 -ytm 768 flink-1.0.0/examples/batch/WordCount.jar --input > >> s3://<my key> --output hdfs:///flink-output > >> > >> First, I see messages like that: > >> 2016-04-04 21:37:10,418 INFO > >> org.apache.hadoop.fs.s3native.NativeS3FileSystem - Opening > key > >> '<my key>' for reading at position '333000' > >> > >> Then, it fails with the following error: > >> > >> ------------------------------------------------------------ > >> > >> The program finished with the following exception: > >> > >> > >> org.apache.flink.client.program.ProgramInvocationException: The program > >> execution failed: Failed to submit job fc13373d993539e647f164e12d82bf90 > >> (WordCount Example) > >> > >> at org.apache.flink.client.program.Client.runBlocking(Client.java:381) > >> > >> at org.apache.flink.client.program.Client.runBlocking(Client.java:355) > >> > >> at org.apache.flink.client.program.Client.runBlocking(Client.java:315) > >> > >> at > >> > org.apache.flink.client.program.ContextEnvironment.execute(ContextEnvironment.java:60) > >> > >> at > >> > org.apache.flink.examples.java.wordcount.WordCount.main(WordCount.java:90) > >> > >> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > >> > >> at > >> > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) > >> > >> at > >> > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > >> > >> at java.lang.reflect.Method.invoke(Method.java:606) > >> > >> at > >> > org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:505) > >> > >> 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: org.apache.flink.runtime.client.JobExecutionException: Failed > >> to submit job fc13373d993539e647f164e12d82bf90 (WordCount Example) > >> > >> at > >> org.apache.flink.runtime.jobmanager.JobManager.org > $apache$flink$runtime$jobmanager$JobManager$$submitJob(JobManager.scala:1100) > >> > >> at > >> > org.apache.flink.runtime.jobmanager.JobManager$$anonfun$handleMessage$1.applyOrElse(JobManager.scala:380) > >> > >> at > >> > scala.runtime.AbstractPartialFunction.apply(AbstractPartialFunction.scala:36) > >> > >> at > >> > org.apache.flink.yarn.YarnJobManager$$anonfun$handleYarnMessage$1.applyOrElse(YarnJobManager.scala:153) > >> > >> at scala.PartialFunction$OrElse.apply(PartialFunction.scala:167) > >> > >> at > >> > org.apache.flink.runtime.LeaderSessionMessageFilter$$anonfun$receive$1.applyOrElse(LeaderSessionMessageFilter.scala:36) > >> > >> at > >> > scala.runtime.AbstractPartialFunction.apply(AbstractPartialFunction.scala:36) > >> > >> at > >> org.apache.flink.runtime.LogMessages$$anon$1.apply(LogMessages.scala:33) > >> > >> at > >> org.apache.flink.runtime.LogMessages$$anon$1.apply(LogMessages.scala:28) > >> > >> at scala.PartialFunction$class.applyOrElse(PartialFunction.scala:123) > >> > >> at > >> > org.apache.flink.runtime.LogMessages$$anon$1.applyOrElse(LogMessages.scala:28) > >> > >> at akka.actor.Actor$class.aroundReceive(Actor.scala:465) > >> > >> at > >> > org.apache.flink.runtime.jobmanager.JobManager.aroundReceive(JobManager.scala:106) > >> > >> at akka.actor.ActorCell.receiveMessage(ActorCell.scala:516) > >> > >> at akka.actor.ActorCell.invoke(ActorCell.scala:487) > >> > >> at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:254) > >> > >> at akka.dispatch.Mailbox.run(Mailbox.scala:221) > >> > >> at akka.dispatch.Mailbox.exec(Mailbox.scala:231) > >> > >> at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260) > >> > >> at > >> > scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339) > >> > >> at > >> scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979) > >> > >> at > >> > scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107) > >> > >> Caused by: org.apache.flink.runtime.JobException: Creating the input > >> splits caused an error: > >> > org.apache.hadoop.conf.Configuration.addResource(Lorg/apache/hadoop/conf/Configuration;)V > >> > >> at > >> > org.apache.flink.runtime.executiongraph.ExecutionJobVertex.<init>(ExecutionJobVertex.java:172) > >> > >> at > >> > org.apache.flink.runtime.executiongraph.ExecutionGraph.attachJobGraph(ExecutionGraph.java:696) > >> > >> at > >> org.apache.flink.runtime.jobmanager.JobManager.org > $apache$flink$runtime$jobmanager$JobManager$$submitJob(JobManager.scala:1023) > >> > >> ... 21 more > >> > >> Caused by: java.lang.NoSuchMethodError: > >> > org.apache.hadoop.conf.Configuration.addResource(Lorg/apache/hadoop/conf/Configuration;)V > >> > >> at > >> > com.amazon.ws.emr.hadoop.fs.EmrFileSystem.initialize(EmrFileSystem.java:96) > >> > >> at > >> > org.apache.flink.runtime.fs.hdfs.HadoopFileSystem.initialize(HadoopFileSystem.java:321) > >> > >> at org.apache.flink.core.fs.FileSystem.get(FileSystem.java:291) > >> > >> at org.apache.flink.core.fs.Path.getFileSystem(Path.java:311) > >> > >> at > >> > org.apache.flink.api.common.io.FileInputFormat.createInputSplits(FileInputFormat.java:450) > >> > >> at > >> > org.apache.flink.api.common.io.FileInputFormat.createInputSplits(FileInputFormat.java:57) > >> > >> at > >> > org.apache.flink.runtime.executiongraph.ExecutionJobVertex.<init>(ExecutionJobVertex.java:156) > >> > >> ... 23 more > >> > >> > >> Somehow, it's still tries to use EMRFS (which may be a valid thing?), > but > >> it is failing to initialize. I don't know enough about EMRFS/S3 interop > so > >> don't know how diagnose it further. > >> > >> I run Flink 1.0.0 compiled for Scala 2.11. > >> > >> Any advice on how to make it work is highly appreciated. > >> > >> > >> Thanks, > >> > >> Timur > >> > >> > >> > >> > >> -------------------------- > >> Ken Krugler > >> +1 530-210-6378 > >> http://www.scaleunlimited.com > >> custom big data solutions & training > >> Hadoop, Cascading, Cassandra & Solr > >> > >> > >> > >> > >> > > >
