# Failed to parse\[host\]? **URL:** \ **Category:** Beats\ **Tags:** beats-development\ **Created:** [September 30, 2018, 9:33pm UTC](https://discuss.elastic.co/t/failed-to-parse-host/150489 "2018-09-30T21:33:13Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![paulkeogh](https://avatars.discourse-cdn.com/v4/letter/p/8dc957/32.png) [@paulkeogh](https://discuss.elastic.co/u/paulkeogh)\ **Post date:** [September 30, 2018, 9:33pm UTC](https://discuss.elastic.co/t/failed-to-parse-host/150489/1 "2018-09-30T21:33:14Z")
I am developing a custom beats client. After a recent upgrade on my elastic server, the beat is now failing to publish with an error of; ``` 2018-09-30T22:25:17.152+0100 WARN elasticsearch/client.go:520 Cannot index event publisher.Event{..., "host":common.MapStr{"name":"DESKTOP-6KQL7DR"}, ...}, Private:interface {}(nil)}, Flags:0x0} (status=400): {"type":"mapper_parsing_exception","reason":"failed to parse [host]","caused_by":{"type":"illegal_state_exception", "reason":"Can't get text on a START_OBJECT at 1:49"}} ``` There is a corresponding exception in the elastic logs. I know there is a breaking change in the release notes for this, but I cannot see how to apply it to a custom beat - any suggestions ? Thanks, ---
**Author:** ![shaunak](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/shaunak/32/6643_2.png) [@shaunak](https://discuss.elastic.co/u/shaunak)\ **Post date:** [October 1, 2018, 2:55am UTC](https://discuss.elastic.co/t/failed-to-parse-host/150489/2 "2018-10-01T02:55:03Z")
Could you post the complete exception from the elasticsearch log here? ---
**Author:** ![paulkeogh](https://avatars.discourse-cdn.com/v4/letter/p/8dc957/32.png) [@paulkeogh](https://discuss.elastic.co/u/paulkeogh)\ **Post date:** [October 1, 2018, 7:24pm UTC](https://discuss.elastic.co/t/failed-to-parse-host/150489/3 "2018-10-01T19:24:19Z")
``` [2018-10-01T19:10:01,769][DEBUG][o.e.a.b.TransportShardBulkAction] [chaindata][3] failed to execute bulk item (index) BulkShardRequest [[chaindata][3]] containing [index {[chaindata][_doc][OB8JMWYB2O_hlHL_jpAp], source[_na_]}] org.elasticsearch.index.mapper.MapperParsingException: failed to parse at org.elasticsearch.index.mapper.DocumentParser.wrapInMapperParsingException(DocumentParser.java:171) ~[elasticsearch-6.4.0.jar:6.4.0] at org.elasticsearch.index.mapper.DocumentParser.parseDocument(DocumentParser.java:72) ~[elasticsearch-6.4.0.jar:6.4.0] at org.elasticsearch.index.mapper.DocumentMapper.parse(DocumentMapper.java:263) ~[elasticsearch-6.4.0.jar:6.4.0] at org.elasticsearch.index.shard.IndexShard.prepareIndex(IndexShard.java:725) ~[elasticsearch-6.4.0.jar:6.4.0] at org.elasticsearch.index.shard.IndexShard.applyIndexOperation(IndexShard.java:702) ~[elasticsearch-6.4.0.jar:6.4.0] at org.elasticsearch.index.shard.IndexShard.applyIndexOperationOnPrimary(IndexShard.java:682) ~[elasticsearch-6.4.0.jar:6.4.0] at org.elasticsearch.action.bulk.TransportShardBulkAction.lambda$executeIndexRequestOnPrimary$2(TransportShardBulkAction.java:560) ~[elasticsearch-6.4.0.jar:6.4.0] at org.elasticsearch.action.bulk.TransportShardBulkAction.executeOnPrimaryWhileHandlingMappingUpdates(TransportShardBulkAction.java:579) ~[elasticsearch-6.4.0.jar:6.4.0] at org.elasticsearch.action.bulk.TransportShardBulkAction.executeIndexRequestOnPrimary(TransportShardBulkAction.java:558) ~[elasticsearch-6.4.0.jar:6.4.0] at org.elasticsearch.action.bulk.TransportShardBulkAction.executeIndexRequest(TransportShardBulkAction.java:141) ~[elasticsearch-6.4.0.jar:6.4.0] at org.elasticsearch.action.bulk.TransportShardBulkAction.executeBulkItemRequest(TransportShardBulkAction.java:247) ~[elasticsearch-6.4.0.jar:6.4.0] at org.elasticsearch.action.bulk.TransportShardBulkAction.performOnPrimary(TransportShardBulkAction.java:124) ~[elasticsearch-6.4.0.jar:6.4.0] at org.elasticsearch.action.bulk.TransportShardBulkAction.shardOperationOnPrimary(TransportShardBulkAction.java:111) ~[elasticsearch-6.4.0.jar:6.4.0] at org.elasticsearch.action.bulk.TransportShardBulkAction.shardOperationOnPrimary(TransportShardBulkAction.java:73) ~[elasticsearch-6.4.0.jar:6.4.0] at org.elasticsearch.action.support.replication.TransportReplicationAction$PrimaryShardReference.perform(TransportReplicationAction.java:1017) ~[elasticsearch-6.4.0.jar:6.4.0] at org.elasticsearch.action.support.replication.TransportReplicationAction$PrimaryShardReference.perform(TransportReplicationAction.java:995) ~[elasticsearch-6.4.0.jar:6.4.0] at org.elasticsearch.action.support.replication.ReplicationOperation.execute(ReplicationOperation.java:101) ~[elasticsearch-6.4.0.jar:6.4.0] at org.elasticsearch.action.support.replication.TransportReplicationAction$AsyncPrimaryAction.onResponse(TransportReplicationAction.java:356) ~[elasticsearch-6.4.0.jar:6.4.0] at org.elasticsearch.action.support.replication.TransportReplicationAction$AsyncPrimaryAction.onResponse(TransportReplicationAction.java:296) ~[elasticsearch-6.4.0.jar:6.4.0] at org.elasticsearch.action.support.replication.TransportReplicationAction$1.onResponse(TransportReplicationAction.java:958) ~[elasticsearch-6.4.0.jar:6.4.0] at org.elasticsearch.action.support.replication.TransportReplicationAction$1.onResponse(TransportReplicationAction.java:955) ~[elasticsearch-6.4.0.jar:6.4.0] at org.elasticsearch.index.shard.IndexShardOperationPermits.acquire(IndexShardOperationPermits.java:271) ~[elasticsearch-6.4.0.jar:6.4.0] at org.elasticsearch.index.shard.IndexShardOperationPermits.acquire(IndexShardOperationPermits.java:238) ~[elasticsearch-6.4.0.jar:6.4.0] at org.elasticsearch.index.shard.IndexShard.acquirePrimaryOperationPermit(IndexShard.java:2249) ~[elasticsearch-6.4.0.jar:6.4.0] at org.elasticsearch.action.support.replication.TransportReplicationAction.acquirePrimaryShardReference(TransportReplicationAction.java:967) ~[elasticsearch-6.4.0.jar:6.4.0] at org.elasticsearch.action.support.replication.TransportReplicationAction.access$500(TransportReplicationAction.java:97) ~[elasticsearch-6.4.0.jar:6.4.0] at org.elasticsearch.action.support.replication.TransportReplicationAction$AsyncPrimaryAction.doRun(TransportReplicationAction.java:317) ~[elasticsearch-6.4.0.jar:6.4.0] at org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:37) ~[elasticsearch-6.4.0.jar:6.4.0] at org.elasticsearch.action.support.replication.TransportReplicationAction$PrimaryOperationTransportHandler.messageReceived(TransportReplicationAction.java:292) ~[elasticsearch-6.4.0.jar:6.4.0] ...... at org.elasticsearch.xpack.security.authc.AuthenticationService.authenticate(AuthenticationService.java:101) [x-pack-security-6.4.0.jar:6.4.0] at org.elasticsearch.xpack.security.transport.ServerTransportFilter$NodeProfile.inbound(ServerTransportFilter.java:130) [x-pack-security-6.4.0.jar:6.4.0] at org.elasticsearch.xpack.security.transport.SecurityServerTransportInterceptor$ProfileSecuredRequestHandler.messageReceived(SecurityServerTransportInterceptor.java:307) [x-pack-security-6.4.0.jar:6.4.0] at org.elasticsearch.transport.RequestHandlerRegistry.processMessageReceived(RequestHandlerRegistry.java:66) [elasticsearch-6.4.0.jar:6.4.0] at org.elasticsearch.transport.TransportService$7.doRun(TransportService.java:665) [elasticsearch-6.4.0.jar:6.4.0] at org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingAbstractRunnable.doRun(ThreadContext.java:723) [elasticsearch-6.4.0.jar:6.4.0] at org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:37) [elasticsearch-6.4.0.jar:6.4.0] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_161] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_161] at java.lang.Thread.run(Thread.java:748) [?:1.8.0_161] Caused by: org.elasticsearch.common.compress.NotXContentException: Compressor detection can only be called on some xcontent bytes or compressed xcontent bytes at org.elasticsearch.common.compress.CompressorFactory.compressor(CompressorFactory.java:56) ~[elasticsearch-6.4.0.jar:6.4.0] at org.elasticsearch.common.xcontent.XContentHelper.createParser(XContentHelper.java:69) ~[elasticsearch-6.4.0.jar:6.4.0] at org.elasticsearch.index.mapper.DocumentParser.parseDocument(DocumentParser.java:65) ~[elasticsearch-6.4.0.jar:6.4.0] ... 54 more ``` ---
**Author:** ![paulkeogh](https://avatars.discourse-cdn.com/v4/letter/p/8dc957/32.png) [@paulkeogh](https://discuss.elastic.co/u/paulkeogh)\ **Post date:** [October 1, 2018, 8:17pm UTC](https://discuss.elastic.co/t/failed-to-parse-host/150489/4 "2018-10-01T20:17:23Z")
I found the answer. The docs here; > describe how to configure host out of the beat; ``` processors: - drop_fields: fields: ["host"] ``` I find it strange though that libbeat 6.4 does not work out of the box with elastic 6.4. ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [October 29, 2018, 8:23pm UTC](https://discuss.elastic.co/t/failed-to-parse-host/150489/5 "2018-10-29T20:23:04Z")
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