# Reindex from ES5 to ES6 Failed **URL:** \ **Category:** Elasticsearch\ **Created:** [October 9, 2018, 4:01pm UTC](https://discuss.elastic.co/t/reindex-from-es5-to-es6-failed/151680 "2018-10-09T16:01:08Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![vineeshvraj7](https://avatars.discourse-cdn.com/v4/letter/v/47e85d/32.png) [@vineeshvraj7](https://discuss.elastic.co/u/vineeshvraj7)\ **Post date:** [October 9, 2018, 4:01pm UTC](https://discuss.elastic.co/t/reindex-from-es5-to-es6-failed/151680/1 "2018-10-09T16:01:08Z")
While re-indexing from elasticsearch v5 to v6 remotely, I am getting an exception: “Caused by: com.fasterxml.jackson.core.JsonParseException: Duplicate field” I was doing re-indexing from **V2 =\> V5 =\> V6** **V2 = \> V5 re-indexing was successful** Since V5 =\> V6 failed, I tried to re-index **V2 =\> V6** but that also failed due to same exception. Caused by: com.fasterxml.jackson.core.JsonParseException: Duplicate field 'addressType' at [Source: org.apache.http.nio.entity.ContentInputStream@64ddbc99; line: 1, column: 899] at com.fasterxml.jackson.core.json.JsonReadContext.\_checkDup(JsonReadContext.java:204) ~[jackson-core-2.8.10.jar:2.8.10] at com.fasterxml.jackson.core.json.JsonReadContext.setCurrentName(JsonReadContext.java:198) ~[jackson-core-2.8.10.jar:2.8.10] at com.fasterxml.jackson.core.json.UTF8StreamJsonParser.nextToken(UTF8StreamJsonParser.java:777) ~[jackson-core-2.8.10.jar:2.8.10] at com.fasterxml.jackson.core.JsonGenerator.copyCurrentStructure(JsonGenerator.java:1813) ~[jackson-core-2.8.10.jar:2.8.10] at com.fasterxml.jackson.core.JsonGenerator.copyCurrentStructure(JsonGenerator.java:1814) ~[jackson-core-2.8.10.jar:2.8.10] at com.fasterxml.jackson.core.JsonGenerator.copyCurrentStructure(JsonGenerator.java:1814) ~[jackson-core-2.8.10.jar:2.8.10] at org.elasticsearch.common.xcontent.json.JsonXContentGenerator.copyCurrentStructure(JsonXContentGenerator.java:393) ~[elasticsearch-x-content-6.4.2.jar:6.4.2] at org.elasticsearch.common.xcontent.XContentBuilder.copyCurrentStructure(XContentBuilder.java:910) ~[elasticsearch-x-content-6.4.2.jar:6.4.2] at org.elasticsearch.index.reindex.remote.RemoteResponseParsers.lambda$static$2(RemoteResponseParsers.java:80) ~[?:?] at org.elasticsearch.common.xcontent.AbstractObjectParser.lambda$declareObject$1(AbstractObjectParser.java:146) ~[elasticsearch-x-content-6.4.2.jar:6.4.2] at org.elasticsearch.common.xcontent.ObjectParser.lambda$declareField$1(ObjectParser.java:213) ~[elasticsearch-x-content-6.4.2.jar:6.4.2] at org.elasticsearch.common.xcontent.ObjectParser.parseValue(ObjectParser.java:314) ~[elasticsearch-x-content-6.4.2.jar:6.4.2] at org.elasticsearch.common.xcontent.ObjectParser.parseSub(ObjectParser.java:326) ~[elasticsearch-x-content-6.4.2.jar:6.4.2] at org.elasticsearch.common.xcontent.ObjectParser.parse(ObjectParser.java:168) ~[elasticsearch-x-content-6.4.2.jar:6.4.2] at org.elasticsearch.common.xcontent.ConstructingObjectParser.parse(ConstructingObjectParser.java:169) ~[elasticsearch-x-content-6.4.2.jar:6.4.2] at org.elasticsearch.common.xcontent.AbstractObjectParser.lambda$declareObjectArray$7(AbstractObjectParser.java:184) ~[elasticsearch-x-content-6.4.2.jar:6.4.2] at org.elasticsearch.common.xcontent.AbstractObjectParser.lambda$declareFieldArray$13(AbstractObjectParser.java:212) ~[elasticsearch-x-content-6.4.2.jar:6.4.2] at org.elasticsearch.common.xcontent.AbstractObjectParser.parseArray(AbstractObjectParser.java:230) ~[elasticsearch-x-content-6.4.2.jar:6.4.2] at org.elasticsearch.common.xcontent.AbstractObjectParser.lambda$declareFieldArray$14(AbstractObjectParser.java:212) ~[elasticsearch-x-content-6.4.2.jar:6.4.2] at org.elasticsearch.common.xcontent.ObjectParser.lambda$declareField$1(ObjectParser.java:213) ~[elasticsearch-x-content-6.4.2.jar:6.4.2] at org.elasticsearch.common.xcontent.ObjectParser.parseValue(ObjectParser.java:314) ~[elasticsearch-x-content-6.4.2.jar:6.4.2] at org.elasticsearch.common.xcontent.ObjectParser.parseArray(ObjectParser.java:308) ~[elasticsearch-x-content-6.4.2.jar:6.4.2] at org.elasticsearch.common.xcontent.ObjectParser.parseSub(ObjectParser.java:329) ~[elasticsearch-x-content-6.4.2.jar:6.4.2] at org.elasticsearch.common.xcontent.ObjectParser.parse(ObjectParser.java:168) ~[elasticsearch-x-content-6.4.2.jar:6.4.2] at org.elasticsearch.common.xcontent.ConstructingObjectParser.parse(ConstructingObjectParser.java:169) ~[elasticsearch-x-content-6.4.2.jar:6.4.2] at org.elasticsearch.common.xcontent.AbstractObjectParser.lambda$declareObject$1(AbstractObjectParser.java:146) ~[elasticsearch-x-content-6.4.2.jar:6.4.2] at org.elasticsearch.common.xcontent.ObjectParser.lambda$declareField$1(ObjectParser.java:213) ~[elasticsearch-x-content-6.4.2.jar:6.4.2] at org.elasticsearch.common.xcontent.ObjectParser.parseValue(ObjectParser.java:314) ~[elasticsearch-x-content-6.4.2.jar:6.4.2] at org.elasticsearch.common.xcontent.ObjectParser.parseSub(ObjectParser.java:326) ~[elasticsearch-x-content-6.4.2.jar:6.4.2] at org.elasticsearch.common.xcontent.ObjectParser.parse(ObjectParser.java:168) ~[elasticsearch-x-content-6.4.2.jar:6.4.2] at org.elasticsearch.common.xcontent.ConstructingObjectParser.parse(ConstructingObjectParser.java:169) ~[elasticsearch-x-content-6.4.2.jar:6.4.2] at org.elasticsearch.common.xcontent.ConstructingObjectParser.apply(ConstructingObjectParser.java:161) ~[elasticsearch-x-content-6.4.2.jar:6.4.2] at org.elasticsearch.common.xcontent.ConstructingObjectParser.apply(ConstructingObjectParser.java:76) ~[elasticsearch-x-content-6.4.2.jar:6.4.2] at org.elasticsearch.index.reindex.remote.RemoteScrollableHitSource$1RetryHelper$1.onSuccess(RemoteScrollableHitSource.java:191) ~[?:?] ... 18 more ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [November 6, 2018, 4:07pm UTC](https://discuss.elastic.co/t/reindex-from-es5-to-es6-failed/151680/2 "2018-11-06T16:07:50Z")
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