Fielddata is disabled on text fields by default kibana

Question

Fielddata is disabled on text fields by default

Hello,

Something weird happend lately in my elasticsearch setup. Metricbeat index got replaced with a new name like the old one is like metricbeat.x.date, but now the index is showing as metricbeat. Version and when trying to visualize. I am getting the bellow error.

Error:

[esaggs] > Request to Elasticsearch failed: {"error":{"root_cause":[{"type":"illegal_argument_exception","reason":"Fielddata is disabled on text fields by default. Set fielddata=true on [host.name] in order to load fielddata in memory by uninverting the inverted index. Note that this can however use significant memory. Alternatively use a keyword field instead."}],"type":"search_phase_execution_exception","reason":"all shards failed","phase":"query","grouped":true,"failed_shards":[{"shard":0,"index":"metricbeat-7.2.1","node":"iD4ffU_sR2-uLU_SP01Ukw","reason":{"type":"illegal_argument_exception","reason":"Fielddata is disabled on text fields by default. Set fielddata=true on [host.name] in order to load fielddata in memory by uninverting the inverted index. Note that this can however use significant memory. Alternatively use a keyword field instead."}}],"caused_by":{"type":"illegal_argument_exception","reason":"Fielddata is disabled on text fields by default. Set fielddata=true on [host.name] in order to load fielddata in memory by uninverting the inverted index. Note that this can however use significant memory. Alternatively use a keyword field instead.","caused_by":{"type":"illegal_argument_exception","reason":"Fielddata is disabled on text fields by default. Set fielddata=true on [host.name] in order to load fielddata in memory by uninverting the inverted index. Note that this can however use significant memory. Alternatively use a keyword field instead."}}},"status":400}

Tried solutions:

Provided the following in console.

PUT my_index/_doc/host.name.keyword
{
"properties": {
"my_field": {
"type": "text",
"fielddata": true
}
}
}

#output:#
{
"_index" : "my_index",
"_type" : "_doc",
"_id" : "host.name",
"_version" : 1,
"_seq_no" : 0,
"_primary_term" : 1,
"found" : true,
"_source" : {
"properties" : {
"my_field" : {
"type" : "text",
"fielddata" : true
}
}
}
}

And also

PUT my_index/_doc/host.name
{
"properties": {
"my_field": {
"type": "text",
"fielddata": true
}
}
}

Output:
{
"_index" : "my_index",
"_type" : "_doc",
"_id" : "host.name",
"_version" : 2,
"result" : "updated",
"_shards" : {
"total" : 2,
"successful" : 1,
"failed" : 0
},
"_seq_no" : 2,
"_primary_term" : 2
}

Can any one help me out on my issue.