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 >> >> >> >> >> >
