elasticsearch kibana 5.6 too many dynamic script compilations painless - elasticsearch

Question

I'm trying to extract a term using a pattern from a text field using a painless script on elasticsearch 5.6.
GET _search
{
"size": 5,
"script_fields": {
"ipaddress": {
"script": {
"inline": "Pattern pattern=Pattern.compile(\\\"([A-Z])\\w+\\\"); Matcher matcher =pattern.matcher(doc['Message'].value); if(matcher.find()){return matcher.group();}return null;",
"lang": "painless"
}
}
},
"query": {
"bool": {
"should": [
{
"match_phrase": {
"Message": "Failed password"
}
},
{
"regexp": {
"Message": {
"value": "([A-Z])\\w+"
}
}
}
]
}
}
}
Instead I receive the error
{
"error": {
"root_cause": [
{
"type": "script_exception",
"reason": "compile error",
"script_stack": [
"... pattern=Pattern.compile(\\\"([A-Z])\\w+\\\"); Matcher ...",
" ^---- HERE"
],
"script": "Pattern pattern=Pattern.compile(\\\"([A-Z])\\w+\\\"); Matcher matcher =pattern.matcher(doc['Message'].value); if(matcher.find()){return matcher.group();}return null;",
"lang": "painless"
},
{
"type": "circuit_breaking_exception",
"reason": "[script] Too many dynamic script compilations within one minute, max: [15/min]; please use on-disk, indexed, or scripts with parameters instead; this limit can be changed by the [script.max_compilations_per_minute] setting",
"bytes_wanted": 0,
"bytes_limit": 0
}
],
It seems quoting the regex pattern is the issue as shown in the error ^-------HERE. How can I quote the pattern?