Pure Controller Failed

Original query, unchanged.

Syslog
| where SyslogMessage has "purity.alert"
| extend Message = replace_regex(SyslogMessage, "#012", "\n")
| extend ParsedLog = extract_all(@"((?P<process>.*?)\[(?P<processid>.*?)\]:\s(?P<object>.*)\[(?P<responsecode>\w+)\][\s\S]*Severity:\s*(?P<severity>\S+)\s*(Tag:\s*(?P<reason>\S+))?\s*UTC([\s\S]*)Array Name:\s*(?P<objectname>\S+)\s*Domain:\s*(?P<domainorigin>\S+)\s*(?P<part2log>[\s\S]*))", dynamic(['process','processid','object','objectname','responsecode','severity','reason','domainorigin','part2log']), Message)
| mv-expand ParsedLog
| extend ResidueLog = tostring(ParsedLog[8])
| extend Rlog = extract_all(@"(((Suggested Action:\s*(?P<action>[\s\S]*)\s*Knowledge Base Article:\s*(?P<url>.*))|(Knowledge Base Article:\s*(?P<url>.*)\s*Suggested Action:\s*(?P<action>.*)\s*)|(Suggested Action:\s*(?P<action>[\s\S]*)))(([\s\S]*)Purity Version:\s*(?P<pversion>.*))?\s*([\s\S]*)Variables: \(below\)\s*(?P<subject>[\s\S]*))", dynamic(['action','url','pversion','subject']),ResidueLog)
| mv-expand Rlog
| extend PureLogType = ParsedLog[0], PureProcessID = ParsedLog[1], PureObject = ParsedLog[2], PureCode = ParsedLog[4], PureSeverity = ParsedLog[5], PureReason = ParsedLog[6], PureObjectName = ParsedLog[3], PureDomainOrigin = ParsedLog[7], PureAction = Rlog[0], PureUrl = Rlog[1], PureVersion = Rlog[2], PureMessage = Rlog[3]
| project-away ResidueLog, Rlog, ParsedLog
| where PureObject matches regex @"(Controllers ct[0-9] have failed)"