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Briefly, this error occurs when Elasticsearch cannot parse the trigger event for a specific watch due to an unexpected token. This usually happens due to a syntax error or incorrect formatting in the watch definition. To resolve this issue, you should first check the watch definition for any syntax errors or incorrect formatting. Make sure that the JSON is valid and all necessary fields are included. If the error persists, try to simplify the watch definition to identify the problematic part. Lastly, ensure that the Elasticsearch version supports the features used in the watch definition.
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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 [{}]. unexpected token [{}] ” 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 [{}]. unexpected token [{}]” class name is ScheduleTriggerEvent.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :
} catch (ElasticsearchParseException pe) {
throw new ElasticsearchParseException("could not parse [{}] trigger event for [{}] for watch [{}]. failed to parse " +
"date field [{}]"; pe; ScheduleTriggerEngine.TYPE; context; watchId; currentFieldName);
}
}else {
throw new ElasticsearchParseException("could not parse trigger event for [{}] for watch [{}]. unexpected token [{}]";
context; watchId; token);
}
} // should never be; it's fully controlled internally (not coming from the user)
