I used mongo-connector to copy all specific collections to elastic and it terminates giving these errors :-
[2016-06-28 18:19:36,517][DEBUG][action.admin.indices.mapping.put] [Left Hand] failed to put mappings on indices [[mycaptionlabsproddev]], type [invoiceHistory] java.lang.IllegalArgumentException: [invoiceItems] is defined as an object in mapping [invoiceHistory] but this name is already used for a field in other types at org.elasticsearch.index.mapper.MapperService.checkFieldUniqueness(MapperService.java:469) at org.elasticsearch.index.mapper.MapperService.merge(MapperService.java:335) at org.elasticsearch.index.mapper.MapperService.merge(MapperService.java:289) at org.elasticsearch.cluster.metadata.MetaDataMappingService$PutMappingExecutor.applyRequest(MetaDataMappingService.java:303) at org.elasticsearch.cluster.metadata.MetaDataMappingService$PutMappingExecutor.execute(MetaDataMappingService.java:230) at org.elasticsearch.cluster.service.InternalClusterService.runTasksForExecutor(InternalClusterService.java:468) at org.elasticsearch.cluster.service.InternalClusterService$UpdateTask.run(InternalClusterService.java:772) at org.elasticsearch.common.util.concurrent.PrioritizedEsThreadPoolExecutor$TieBreakingPrioritizedRunnable.runAndClean(PrioritizedEsThreadPoolExecutor.java:231) at org.elasticsearch.common.util.concurrent.PrioritizedEsThreadPoolExecutor$TieBreakingPrioritizedRunnable.run(PrioritizedEsThreadPoolExecutor.java:194) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:745) [2016-06-28 18:19:36,520][DEBUG][action.admin.indices.mapping.put] [Left Hand] failed to put mappings on indices [[mycaptionlabsproddev]], type [invoiceHistory] java.lang.IllegalArgumentException: [invoiceItems] is defined as an object in mapping [invoiceHistory] but this name is already used for a field in other types at org.elasticsearch.index.mapper.MapperService.checkFieldUniqueness(MapperService.java:469) at org.elasticsearch.index.mapper.MapperService.merge(MapperService.java:335) at org.elasticsearch.index.mapper.MapperService.merge(MapperService.java:289) at org.elasticsearch.cluster.metadata.MetaDataMappingService$PutMappingExecutor.applyRequest(MetaDataMappingService.java:303) at org.elasticsearch.cluster.metadata.MetaDataMappingService$PutMappingExecutor.execute(MetaDataMappingService.java:230) at org.elasticsearch.cluster.service.InternalClusterService.runTasksForExecutor(InternalClusterService.java:468) at org.elasticsearch.cluster.service.InternalClusterService$UpdateTask.run(InternalClusterService.java:772) at org.elasticsearch.common.util.concurrent.PrioritizedEsThreadPoolExecutor$TieBreakingPrioritizedRunnable.runAndClean(PrioritizedEsThreadPoolExecutor.java:231) at org.elasticsearch.common.util.concurrent.PrioritizedEsThreadPoolExecutor$TieBreakingPrioritizedRunnable.run(PrioritizedEsThreadPoolExecutor.java:194) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:745) [2016-06-28 18:19:36,521][DEBUG][action.bulk ] [Left Hand] [mycaptionlabsproddev][0] failed to execute bulk item (index)