Could not parse trigger event for for watch failed to parse – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-7.15

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Briefly, this error occurs when Elasticsearch is unable to parse the trigger event for a specific watch. This could be due to incorrect syntax, invalid data format, or a missing field in the watch definition. To resolve this issue, you can: 1) Check the syntax of your watch definition and correct any errors. 2) Ensure that the data format matches the expected format. 3) Make sure all required fields are included in the watch definition. 4) If the error persists, consider recreating the watch from scratch.

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This guide will help you check for common problems that cause the log ” could not parse [{}] trigger event for [{}] for watch [{}]. failed to parse ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin.

Log Context

Log “could not parse [{}] trigger event for [{}] for watch [{}]. failed to parse” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 } else if (Field.TRIGGERED_TIME.match(currentFieldName; parser.getDeprecationHandler())) {
 try {
 triggeredTime = WatcherDateTimeUtils.parseDateMath(currentFieldName; parser; ZoneOffset.UTC; clock);
 } catch (ElasticsearchParseException pe) {
 //Failed to parse as a date try datemath parsing
 throw new ElasticsearchParseException("could not parse [{}] trigger event for [{}] for watch [{}]. failed to parse " +
 "date field [{}]"; pe; ScheduleTriggerEngine.TYPE; context; watchId; currentFieldName);
 }  else if (Field.SCHEDULED_TIME.match(currentFieldName; parser.getDeprecationHandler())) {
 try {
 scheduledTime = WatcherDateTimeUtils.parseDateMath(currentFieldName; parser; ZoneOffset.UTC; clock);


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