# \[Hadoop\] java.lang.IncompatibleClassChangeError: Found interface org.apache.hadoop.mapreduce.JobContext, but class was expected **URL:** \ **Category:** Elasticsearch\ **Created:** [April 15, 2014, 7:52am UTC](https://discuss.elastic.co/t/hadoop-java-lang-incompatibleclasschangeerror-found-interface-org-apache-hadoop-mapreduce-jobcontext-but-class-was-expected/17018 "2014-04-15T07:52:36Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![Shaun\_Campbell](https://avatars.discourse-cdn.com/v4/letter/s/e56c9b/32.png) [@Shaun\_Campbell](https://discuss.elastic.co/u/Shaun_Campbell)\ **Post date:** [April 15, 2014, 7:52am UTC](https://discuss.elastic.co/t/hadoop-java-lang-incompatibleclasschangeerror-found-interface-org-apache-hadoop-mapreduce-jobcontext-but-class-was-expected/17018/1 "2014-04-15T07:52:36Z")
Hi there, I'm having a bit of trouble using the Maven published version of elasticsearch-hadoop 1.3.0M3. According to the docs, it should be compatible with both Hadoop 1.x and 2.x, although I'm seeing an error indicating otherwise. I downloaded the sources, and modified the build to compile against hadoop 2.x only and this seems to have worked. Is there a java option perhaps that I should add to make the maven distributed jar work correctly? -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/a78cb9e0-a0e4-4e75-832e-9b2a193e0473%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/a78cb9e0-a0e4-4e75-832e-9b2a193e0473%40googlegroups.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![costin](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/costin/32/44950_2.png) [@costin](https://discuss.elastic.co/u/costin)\ **Post date:** [April 15, 2014, 7:58am UTC](https://discuss.elastic.co/t/hadoop-java-lang-incompatibleclasschangeerror-found-interface-org-apache-hadoop-mapreduce-jobcontext-but-class-was-expected/17018/2 "2014-04-15T07:58:11Z")
Hi, You bumped into a bug that slipped in M3. This has been fixed in master - can you please try out the SNAPSHOTs [1]? Thanks, [1] [Elasticsearch Platform — Find real-time answers at scale | Elastic](http://www.elasticsearch.org/guide/en/elasticsearch/hadoop/current/install.html#download-dev) On 4/15/14 10:52 AM, Shaun Campbell wrote: > Hi there, > > I'm having a bit of trouble using the Maven published version of elasticsearch-hadoop 1.3.0M3. According to the docs, it > should be compatible with both Hadoop 1.x and 2.x, although I'm seeing an error indicating otherwise. I downloaded the > sources, and modified the build to compile against hadoop 2.x only and this seems to have worked. Is there a java option > perhaps that I should add to make the maven distributed jar work correctly? > > -- > You received this message because you are subscribed to the Google Groups "elasticsearch" group. > To unsubscribe from this group and stop receiving emails from it, send an email to > [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com) [mailto:elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). > To view this discussion on the web visit > [https://groups.google.com/d/msgid/elasticsearch/a78cb9e0-a0e4-4e75-832e-9b2a193e0473%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/a78cb9e0-a0e4-4e75-832e-9b2a193e0473%40googlegroups.com) > [https://groups.google.com/d/msgid/elasticsearch/a78cb9e0-a0e4-4e75-832e-9b2a193e0473%40googlegroups.com?utm\_medium=email&utm\_source=footer](https://groups.google.com/d/msgid/elasticsearch/a78cb9e0-a0e4-4e75-832e-9b2a193e0473%40googlegroups.com?utm_medium=email&utm_source=footer). > For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). -- Costin -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/534CE693.5000600%40gmail.com](https://groups.google.com/d/msgid/elasticsearch/534CE693.5000600%40gmail.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![Shaun\_Campbell](https://avatars.discourse-cdn.com/v4/letter/s/e56c9b/32.png) [@Shaun\_Campbell](https://discuss.elastic.co/u/Shaun_Campbell)\ **Post date:** [April 15, 2014, 8:30am UTC](https://discuss.elastic.co/t/hadoop-java-lang-incompatibleclasschangeerror-found-interface-org-apache-hadoop-mapreduce-jobcontext-but-class-was-expected/17018/3 "2014-04-15T08:30:06Z")
Thanks Costin, that has fixed it! 🙂 -----Original Message----- From: [elasticsearch@googlegroups.com](mailto:elasticsearch@googlegroups.com) [[mailto:elasticsearch@googlegroups.com](mailto:elasticsearch@googlegroups.com)] On Behalf Of Costin Leau Sent: 15 April 2014 08:58 To: [elasticsearch@googlegroups.com](mailto:elasticsearch@googlegroups.com) Subject: Re: [Hadoop] java.lang.IncompatibleClassChangeError: Found interface org.apache.hadoop.mapreduce.JobContext, but class was expected Hi, You bumped into a bug that slipped in M3. This has been fixed in master - can you please try out the SNAPSHOTs [1]? Thanks, [1] [Elasticsearch Platform — Find real-time answers at scale | Elastic](http://www.elasticsearch.org/guide/en/elasticsearch/hadoop/current/install.html#download-dev) On 4/15/14 10:52 AM, Shaun Campbell wrote: > Hi there, > > I'm having a bit of trouble using the Maven published version of > elasticsearch-hadoop 1.3.0M3. According to the docs, it should be > compatible with both Hadoop 1.x and 2.x, although I'm seeing an error > indicating otherwise. I downloaded the sources, and modified the build to compile against hadoop 2.x only and this seems to have worked. Is there a java option perhaps that I should add to make the maven distributed jar work correctly? > > -- > You received this message because you are subscribed to the Google Groups "elasticsearch" group. > To unsubscribe from this group and stop receiving emails from it, send > an email to > [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com) [mailto:elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). > To view this discussion on the web visit > [https://groups.google.com/d/msgid/elasticsearch/a78cb9e0-a0e4-4e75-832](https://groups.google.com/d/msgid/elasticsearch/a78cb9e0-a0e4-4e75-832) > e-9b2a193e0473%[40googlegroups.com](http://40googlegroups.com) > [https://groups.google.com/d/msgid/elasticsearch/a78cb9e0-a0e4-4e75-832e-9b2a193e0473%40googlegroups.com?utm\_medium=email&utm\_source=footer](https://groups.google.com/d/msgid/elasticsearch/a78cb9e0-a0e4-4e75-832e-9b2a193e0473%40googlegroups.com?utm_medium=email&utm_source=footer). > For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). -- Costin -- You received this message because you are subscribed to a topic in the Google Groups "elasticsearch" group. To unsubscribe from this topic, visit [https://groups.google.com/d/topic/elasticsearch/53dU6sOvZcc/unsubscribe](https://groups.google.com/d/topic/elasticsearch/53dU6sOvZcc/unsubscribe). To unsubscribe from this group and all its topics, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/534CE693.5000600%40gmail.com](https://groups.google.com/d/msgid/elasticsearch/534CE693.5000600%40gmail.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/71EFF79072522748856FBA8E09C46CB24488CC55%40GBRMBX02.emea.SAS.com](https://groups.google.com/d/msgid/elasticsearch/71EFF79072522748856FBA8E09C46CB24488CC55%40GBRMBX02.emea.SAS.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![costin](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/costin/32/44950_2.png) [@costin](https://discuss.elastic.co/u/costin)\ **Post date:** [April 15, 2014, 8:36am UTC](https://discuss.elastic.co/t/hadoop-java-lang-incompatibleclasschangeerror-found-interface-org-apache-hadoop-mapreduce-jobcontext-but-class-was-expected/17018/4 "2014-04-15T08:36:12Z")
Excellent. The fix will be part of RC1 which is not too far off. Cheers, On 4/15/14 11:30 AM, Shaun Campbell wrote: > Thanks Costin, that has fixed it! 🙂 > > -----Original Message----- > From: [elasticsearch@googlegroups.com](mailto:elasticsearch@googlegroups.com) [[mailto:elasticsearch@googlegroups.com](mailto:elasticsearch@googlegroups.com)] On Behalf Of Costin Leau > Sent: 15 April 2014 08:58 > To: [elasticsearch@googlegroups.com](mailto:elasticsearch@googlegroups.com) > Subject: Re: [Hadoop] java.lang.IncompatibleClassChangeError: Found interface org.apache.hadoop.mapreduce.JobContext, but class was expected > > Hi, > > You bumped into a bug that slipped in M3. This has been fixed in master - can you please try out the SNAPSHOTs [1]? > > Thanks, > > [1] [Elasticsearch Platform — Find real-time answers at scale | Elastic](http://www.elasticsearch.org/guide/en/elasticsearch/hadoop/current/install.html#download-dev) > > On 4/15/14 10:52 AM, Shaun Campbell wrote: > > > Hi there, > > > > I'm having a bit of trouble using the Maven published version of > > elasticsearch-hadoop 1.3.0M3. According to the docs, it should be > > compatible with both Hadoop 1.x and 2.x, although I'm seeing an error > > indicating otherwise. I downloaded the sources, and modified the build to compile against hadoop 2.x only and this seems to have worked. Is there a java option perhaps that I should add to make the maven distributed jar work correctly? > > > > -- > > You received this message because you are subscribed to the Google Groups "elasticsearch" group. > > To unsubscribe from this group and stop receiving emails from it, send > > an email to > > [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com) [mailto:elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). > > To view this discussion on the web visit > > [https://groups.google.com/d/msgid/elasticsearch/a78cb9e0-a0e4-4e75-832](https://groups.google.com/d/msgid/elasticsearch/a78cb9e0-a0e4-4e75-832) > > e-9b2a193e0473%[40googlegroups.com](http://40googlegroups.com) > > [https://groups.google.com/d/msgid/elasticsearch/a78cb9e0-a0e4-4e75-832e-9b2a193e0473%40googlegroups.com?utm\_medium=email&utm\_source=footer](https://groups.google.com/d/msgid/elasticsearch/a78cb9e0-a0e4-4e75-832e-9b2a193e0473%40googlegroups.com?utm_medium=email&utm_source=footer). > > For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). > > -- > Costin > > -- > You received this message because you are subscribed to a topic in the Google Groups "elasticsearch" group. > To unsubscribe from this topic, visit [https://groups.google.com/d/topic/elasticsearch/53dU6sOvZcc/unsubscribe](https://groups.google.com/d/topic/elasticsearch/53dU6sOvZcc/unsubscribe). > To unsubscribe from this group and all its topics, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). > To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/534CE693.5000600%40gmail.com](https://groups.google.com/d/msgid/elasticsearch/534CE693.5000600%40gmail.com). > For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). -- Costin -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/534CEF7C.5090801%40gmail.com](https://groups.google.com/d/msgid/elasticsearch/534CEF7C.5090801%40gmail.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 6, 2017, 1:35am UTC](https://discuss.elastic.co/t/hadoop-java-lang-incompatibleclasschangeerror-found-interface-org-apache-hadoop-mapreduce-jobcontext-but-class-was-expected/17018/5 "2017-07-06T01:35:51Z")