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Briefly, this error occurs when Elasticsearch is unable to parse the trigger due to an unexpected data type. The trigger type is expected to be a string, but a different data type was found. To resolve this issue, you should check the trigger configuration in your Elasticsearch code. Ensure that the trigger type is correctly defined as a string. If you’re using JSON, make sure the trigger type is enclosed in quotes to denote it as a string. Also, validate your JSON for any syntax errors that might be causing the problem.
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This guide will help you check for common problems that cause the log ” could not parse trigger for [{}]. expected trigger type string field; but found [{}] ” 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 for [{}]. expected trigger type string field; but found [{}]” class name is TriggerService.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :
public Trigger parseTrigger(String jobName; XContentParser parser) throws IOException {
XContentParser.Token token = parser.currentToken();
assert token == XContentParser.Token.START_OBJECT;
token = parser.nextToken();
if (token != XContentParser.Token.FIELD_NAME) {
throw new ElasticsearchParseException("could not parse trigger for [{}]. expected trigger type string field; but found [{}]";
jobName; token);
}
String type = parser.currentName();
token = parser.nextToken();
if (token != XContentParser.Token.START_OBJECT) {
