Briefly, this error occurs when Elasticsearch is unable to parse a schedule due to an unexpected format or missing schedule type field. This is often due to incorrect syntax or a missing parameter in the schedule configuration. To resolve this issue, you should first verify the schedule syntax and ensure it adheres to the correct format. Secondly, check that the schedule type field is present and correctly defined. Lastly, ensure that the schedule is compatible with the version of Elasticsearch you are using.
This guide will help you check for common problems that cause the log ” could not parse schedule. expected a schedule type field; but found [{}] instead ” 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 schedule. expected a schedule type field; but found [{}] instead” class name is ScheduleRegistry.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :
if (token == XContentParser.Token.FIELD_NAME) { type = parser.currentName(); } else if (type != null) { schedule = parse(context; type; parser); } else { throw new ElasticsearchParseException("could not parse schedule. expected a schedule type field; but found [{}] instead"; token); } } if (schedule == null) { throw new ElasticsearchParseException("could not parse schedule. expected a schedule type field; but no fields were found");
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