Elasticsearch Watcher error while trying to send email attachment, dashboard.pdf - elasticsearch

Question

I have created a watcher alert from the advanced option which sends dashboard.pdf as an email attachment when the triggering condition is met. Now when the criteria is matching (threshold is exceeded) then it is throwing error as below in the watcher output.
"root_cause": [
{
"type": "connect_timeout_exception",
"reason": "Connect to mydomainname.com:443 [mydomainname.com/XX.X.XXX.XXX] failed: Connect timed out"
}
],
"type": "connect_timeout_exception",
"reason": "Connect to mydomainname.com:443 [mydomainname.com/XX.X.XXX.XXX] failed: Connect timed out",
"caused_by": {
"type": "socket_timeout_exception",
"reason": "Connect timed out"
Below is found from Elasticsearch log.
[2022-03-29T11:39:54,682][ERROR][o.e.x.w.a.e.ExecutableEmailAction] [node-1] failed to execute action [test_watcher_1_last10mins_gte5_tran_dt_accord_sof/email_admin]
org.apache.http.conn.ConnectTimeoutException: Connect to mydomainname.com:443 [mydomainname.com/XX.X.XXX.XXX] failed: Connect timed out
....
....
Caused by: java.net.SocketTimeoutException: Connect timed out
Below is the watcher script.
{
"trigger": {
"schedule": {
"interval": "6m"
}
},
"input": {
"search": {
"request": {
"search_type": "query_then_fetch",
"indices": [
"my_index"
],
"rest_total_hits_as_int": true,
"body": {
"size": 0,
"query": {
"bool": {
"must": [
{
"bool": {
"minimum_should_match": 1,
"should": [
{
"match_phrase": {
"partner.keyword": "RXGTY"
}
},
{
"match_phrase": {
"partner.keyword": "VGHUT"
}
}
]
}
},
{
"match": {
"state.keyword": {"query": "Fail"}
}
},
{
"match": {
"ops.keyword": {"query": "api_name"}
}
}
],
"filter": {
"range": {
"datetime": {
"gte": "{{ctx.trigger.scheduled_time}}||-5m",
"lte": "{{ctx.trigger.scheduled_time}}",
"format": "strict_date_optional_time||epoch_millis"
}
}
}
}
}
}
}
}
},
"condition": {
"script": {
"source": "if (ctx.payload.hits.total >= params.threshold) { return true; } return false;",
"lang": "painless",
"params": {
"threshold": 1
}
}
},
"actions": {
"email_admin": {
"email": {
"profile": "standard",
"attachments": {
"dashboard.pdf": {
"reporting": {
"url": "https://mydomainname.com/api/reporting/generate/printablePdf?jobParams= ..removing the rest portion of the url for security reason",
"auth": {"type":"basic","username":"elastic","password":"pass"}
}
},
"data.yml": {
"data": {
"format": "yaml"
}
}
},
"from": "from_email#xyz.com",
"to": [
"to_email_name <to_email#abc.com>"
],
"subject": "Elastic Watcher : Alert 1",
"body": {
"text": "Too many error in the system, see attached data."
}
}
}
},
"transform": {
"script": {
"source": "HashMap result = new HashMap(); result.result = ctx.payload.hits.total; return result;",
"lang": "painless",
"params": {
"threshold": 1
}
}
}
}
Our elastic stack version is 7.11.1 and the license is activated, basic stack security is enabled.
Note that, when I have tried the same from local kibana (7.10.1), where the trial license is activated, there this alerting action is working perfectly. Also note that, in my local stack, the security feature is not enabled.
Please help!!
Regards,
Souvik