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From Robert Metzger <rmetz...@apache.org>
Subject Re: NoClassDefFoundError with ElasticsearchSink on Yarn
Date Fri, 09 Sep 2016 09:49:50 GMT
Hi Steffen,

I think it would be good to add it to the documentation.
Would you like to open a pull request?


Regards,
Robert


On Mon, Sep 5, 2016 at 10:26 PM, Steffen Hausmann <
steffen@hausmann-family.de> wrote:

> Thanks Aris for your explanation!
>
> A guava version mismatch was indeed the problem. But in addition to
> shading the guava dependencies, I encountered another issue caused by
> conflicting files in META-INF/services:
>
> RemoteTransportException[[Failed to deserialize response of type
>> [org.elasticsearch.action.admin.cluster.node.liveness.LivenessResponse]]];
>> nested: TransportSerializationException[Failed to deserialize response
>> of type [org.elasticsearch.action.admin.cluster.node.liveness.LivenessResponse]];
>> nested: ExceptionInInitializerError; nested: IllegalArgumentException[An
>> SPI class of type org.apache.lucene.codecs.PostingsFormat with name
>> 'Lucene50' does not exist.  You need to add the corresponding JAR file
>> supporting this SPI to your classpath.  The current classpath supports the
>> following names: [es090, completion090, XBloomFilter]];
>>
>
> By adding the following bits to my pom.xml file, the conflicting files are
> appended instead of overwritten and hence the ElasticSearch sink works as
> expected:
>
> <transformer implementation="org.apache.maven.plugins.shade.resource.Appe
>> ndingTransformer">
>>     <resource>META-INF/services/org.apache.lucene.codecs.Codec</resource>
>> </transformer>
>> <transformer implementation="org.apache.maven.plugins.shade.resource.Appe
>> ndingTransformer">
>>     <resource>META-INF/services/org.apache.lucene.codecs.DocValu
>> esFormat</resource>
>> </transformer>
>> <transformer implementation="org.apache.maven.plugins.shade.resource.Appe
>> ndingTransformer">
>>    <resource>META-INF/services/org.apache.lucene.codecs.Postin
>> gsFormat</resource>
>> </transformer>
>>
>
> Maybe this is something that can be added to the documentation?
>
> Thanks,
> Steffen
>
> On 01/09/2016 12:22, aris kol wrote:
>
>> Classic problem of every uber-jar containing Hadoop dependencies and
>> being deployed on Yarn.
>>
>> What actually happens is that some Hadoop dependency relies on an
>> old version of guava (11 in this case), which doesn't have the method.
>> You may have assembled your fat-jar properly, but because Hadoop deps
>> get introduced to your classpath before your own, you invoke the method
>> using the guava 11 version of the class.
>>
>> I fixed that by adding this line:
>>
>>
>> ++ Seq(assemblyShadeRules in assembly :=
>> Seq(ShadeRule.rename("com.google.common.**" -> "shaded.@1").inAll))
>>
>> on the artefact that gets deployed on flink.
>>
>> What this practically does is to shade the guava dependencies. Instead
>> of containing references to com.google.common your build will reference
>> shaded.com.google.common and as a result it will use the proper class in
>> your fat jar.
>> Get a bit creative with the name (ie use shadedhausmann instead of
>> shaded) to avoid colliding with external deps shading stuff (something
>> you have to do when using guava, joda, jackson etc).
>>
>> Let me know if this helped.
>>
>> Aris
>>
>> ------------------------------------------------------------------------
>> *From:* Steffen Hausmann <steffen@hausmann-family.de>
>> *Sent:* Thursday, September 1, 2016 8:58 AM
>> *To:* user@flink.apache.org
>> *Subject:* NoClassDefFoundError with ElasticsearchSink on Yarn
>>
>>
>> Hi there,
>>
>> I’m running a flink program that reads from a Kinesis stream and
>> eventually writes to an Elasticsearch2 sink. When I’m running the
>> program locally from the IDE, everything seems to work fine, but when
>> I’m executing the same program on an EMR cluster with Yarn, a
>> NoClassDefFoundError occurs:java.lang.NoSuchMethodError:
>>
>> com.google.common.util.concurrent.MoreExecutors.directExecut
>> or()Ljava/util/concurrent/Executor;
>>         at
>> org.elasticsearch.threadpool.ThreadPool.<clinit>(ThreadPool.java:190)
>>         at
>> org.elasticsearch.client.transport.TransportClient$Builder.
>> build(TransportClient.java:133)
>>         at
>> org.apache.flink.streaming.connectors.elasticsearch2.Elastic
>> searchSink.open(ElasticsearchSink.java:164)
>>         at
>> org.apache.flink.api.common.functions.util.FunctionUtils.ope
>> nFunction(FunctionUtils.java:38)
>>         at
>> org.apache.flink.streaming.api.operators.AbstractUdfStreamOp
>> erator.open(AbstractUdfStreamOperator.java:91)
>>         at
>> org.apache.flink.streaming.runtime.tasks.StreamTask.openAllO
>> perators(StreamTask.java:376)
>>         at
>> org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(
>> StreamTask.java:256)
>>         at org.apache.flink.runtime.taskmanager.Task.run(Task.java:584)
>>         at java.lang.Thread.run(Thread.java:745)
>>
>> I’ve installed flink on an EMR cluster from the binary distribution
>> flink-1.1.1-bin-hadoop27-scala_2.10.tgzand the jar file that is executed
>> on the cluster is build with mvn clean package(I’ve attached the pom.xml
>> for reference).
>>
>> There is a thread on this list that seems to be related, but I’m afraid
>> I couldn’t draw any conclusions from it:
>> http://apache-flink-user-mailing-list-archive.2336050.n4.
>> nabble.com/classpath-issue-on-yarn-tt6442.html#none
>>
>> Any idea, what’s wrong?
>>
>> Thanks,
>> Steffen
>>
>>

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