Unable to see the logs in kibana dashboard . But Filebeat is working fine

I'm unable to see the logs in kibana(kibana 6.3.1) dashboard. But Filebeat is working fine. When I checked it in logstash, I got some errors. Please find the error message below & give some advice about this.

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[2020-02-28T06:01:28,119][DEBUG][o.e.a.b.TransportShardBulkAction] [logstash-2020.02.28][4] failed to execute bulk item (index) BulkShardRequest [[logstash-2020.02.28][4]] containing [25] requests

org.elasticsearch.index.mapper.MapperParsingException: failed to parse [host]

            at org.elasticsearch.index.mapper.FieldMapper.parse(FieldMapper.java:302) ~[elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.index.mapper.DocumentParser.parseObjectOrField(DocumentParser.java:481) ~[elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.index.mapper.DocumentParser.parseObject(DocumentParser.java:496) ~[elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.index.mapper.DocumentParser.innerParseObject(DocumentParser.java:390) ~[elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.index.mapper.DocumentParser.parseObjectOrNested(DocumentParser.java:380) ~[elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.index.mapper.DocumentParser.internalParseDocument(DocumentParser.java:95) ~[elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.index.mapper.DocumentParser.parseDocument(DocumentParser.java:69) ~[elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.index.mapper.DocumentMapper.parse(DocumentMapper.java:261) ~[elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.index.shard.IndexShard.prepareIndex(IndexShard.java:700) ~[elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.index.shard.IndexShard.applyIndexOperation(IndexShard.java:677) ~[elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.index.shard.IndexShard.applyIndexOperationOnPrimary(IndexShard.java:658) ~[elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.action.bulk.TransportShardBulkAction.lambda$executeIndexRequestOnPrimary$2(TransportShardBulkAction.java:553) ~[elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.action.bulk.TransportShardBulkAction.executeOnPrimaryWhileHandlingMappingUpdates(TransportShardBulkAction.java:572) ~[elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.action.bulk.TransportShardBulkAction.executeIndexRequestOnPrimary(TransportShardBulkAction.java:551) ~[elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.action.bulk.TransportShardBulkAction.executeIndexRequest(TransportShardBulkAction.java:142) [elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.action.bulk.TransportShardBulkAction.executeBulkItemRequest(TransportShardBulkAction.java:248) [elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.action.bulk.TransportShardBulkAction.performOnPrimary(TransportShardBulkAction.java:125) [elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.action.bulk.TransportShardBulkAction.shardOperationOnPrimary(TransportShardBulkAction.java:112) [elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.action.bulk.TransportShardBulkAction.shardOperationOnPrimary(TransportShardBulkAction.java:74) [elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.action.support.replication.TransportReplicationAction$PrimaryShardReference.perform(TransportReplicationAction.java:1018) [elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.action.support.replication.TransportReplicationAction$PrimaryShardReference.perform(TransportReplicationAction.java:996) [elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.action.support.replication.ReplicationOperation.execute(ReplicationOperation.java:103) [elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.action.support.replication.TransportReplicationAction$AsyncPrimaryAction.onResponse(TransportReplicationAction.java:357) [elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.action.support.replication.TransportReplicationAction$AsyncPrimaryAction.onResponse(TransportReplicationAction.java:297) [elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.action.support.replication.TransportReplicationAction$1.onResponse(TransportReplicationAction.java:959) [elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.action.support.replication.TransportReplicationAction$1.onResponse(TransportReplicationAction.java:956) [elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.index.shard.IndexShardOperationPermits.acquire(IndexShardOperationPermits.java:270) [elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.index.shard.IndexShardOperationPermits.acquire(IndexShardOperationPermits.java:237) [elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.index.shard.IndexShard.acquirePrimaryOperationPermit(IndexShard.java:2213) [elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.action.support.replication.TransportReplicationAction.acquirePrimaryShardReference(TransportReplicationAction.java:968) [elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.action.support.replication.TransportReplicationAction.access$500(TransportReplicationAction.java:98) [elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.action.support.replication.TransportReplicationAction$AsyncPrimaryAction.doRun(TransportReplicationAction.java:318) [elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:37) [elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.action.support.replication.TransportReplicationAction$PrimaryOperationTransportHandler.messageReceived(TransportReplicationAction.java:293) [elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.action.support.replication.TransportReplicationAction$PrimaryOperationTransportHandler.messageReceived(TransportReplicationAction.java:280) [elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.xpack.security.transport.SecurityServerTransportInterceptor$ProfileSecuredRequestHandler$1.doRun(SecurityServerTransportInterceptor.java:259) [x-pack-security-6.3.1.jar:6.3.1]

            at org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:37) [elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.xpack.security.transport.SecurityServerTransportInterceptor$ProfileSecuredRequestHandler.messageReceived(SecurityServerTransportInterceptor.java:317) [x-pack-security-6.3.1.jar:6.3.1]

            at org.elasticsearch.transport.RequestHandlerRegistry.processMessageReceived(RequestHandlerRegistry.java:66) [elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.transport.TransportService$7.doRun(TransportService.java:664) [elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingAbstractRunnable.doRun(ThreadContext.java:725) [elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:37) [elasticsearch-6.3.1.jar:6.3.1]

            at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_242]

            at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_242]

            at java.lang.Thread.run(Thread.java:748) [?:1.8.0_242]

Caused by: java.lang.IllegalStateException: Can't get text on a START_OBJECT at 1:180

            at org.elasticsearch.common.xcontent.json.JsonXContentParser.text(JsonXContentParser.java:86) ~[elasticsearch-x-content-6.3.1.jar:6.3.1]

            at org.elasticsearch.common.xcontent.support.AbstractXContentParser.textOrNull(AbstractXContentParser.java:269) ~[elasticsearch-x-content-6.3.1.jar:6.3.1]

            at org.elasticsearch.index.mapper.TextFieldMapper.parseCreateField(TextFieldMapper.java:564) ~[elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.index.mapper.FieldMapper.parse(FieldMapper.java:297) ~[elasticsearch-6.3.1.jar:6.3.1]

            ... 44 more

[2020-02-28T06:01:28,120][DEBUG][o.e.a.b.TransportShardBulkAction] [logstash-2020.02.28][4] failed to execute bulk item (index) BulkShardRequest [[logstash-2020.02.28][4]] containing [25] requests

org.elasticsearch.index.mapper.MapperParsingException: failed to parse [host]

            at org.elasticsearch.index.mapper.FieldMapper.parse(FieldMapper.java:302) ~[elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.index.mapper.DocumentParser.parseObjectOrField(DocumentParser.java:481) ~[elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.index.mapper.DocumentParser.parseObject(DocumentParser.java:496) ~[elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.index.mapper.DocumentParser.innerParseObject(DocumentParser.java:390) ~[elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.index.mapper.DocumentParser.parseObjectOrNested(DocumentParser.java:380) ~[elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.index.mapper.DocumentParser.internalParseDocument(DocumentParser.java:95) ~[elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.index.mapper.DocumentParser.parseDocument(DocumentParser.java:69) ~[elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.index.mapper.DocumentMapper.parse(DocumentMapper.java:261) ~[elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.index.shard.IndexShard.prepareIndex(IndexShard.java:700) ~[elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.index.shard.IndexShard.applyIndexOperation(IndexShard.java:677) ~[elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.index.shard.IndexShard.applyIndexOperationOnPrimary(IndexShard.java:658) ~[elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.action.bulk.TransportShardBulkAction.lambda$executeIndexRequestOnPrimary$2(TransportShardBulkAction.java:553) ~[elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.action.bulk.TransportShardBulkAction.executeOnPrimaryWhileHandlingMappingUpdates(TransportShardBulkAction.java:572) ~[elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.action.bulk.TransportShardBulkAction.executeIndexRequestOnPrimary(TransportShardBulkAction.java:551) ~[elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.action.bulk.TransportShardBulkAction.executeIndexRequest(TransportShardBulkAction.java:142) [elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.action.bulk.TransportShardBulkAction.executeBulkItemRequest(TransportShardBulkAction.java:248) [elasticsearch-6.3.1.jar:6.3.1]

            at org.elasticsearch.action.bulk.TransportShardBulkAction.performOnPrimary(TransportShardBulkAction.java:125) [elasticsearch-6.3.1.jar:6.3.1]

See here or here.