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Briefly, this error occurs when Elasticsearch is unable to parse the input for a watch due to an unknown input type. This typically happens when the input type specified in the watch definition is not recognized by Elasticsearch. To resolve this issue, you can check the watch definition and ensure that the input type is correctly specified. If the input type is a custom one, make sure it has been properly registered. Also, ensure that the Elasticsearch version supports the input type you’re using.
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This guide will help you check for common problems that cause the log ” could not parse input for watch [{}]. unknown input type [{}] ” 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 input for watch [{}]. unknown input type [{}]” class name is InputRegistry.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :
token
);
} else if (token == XContentParser.Token.START_OBJECT) {
InputFactory factory = factories.get(type);
if (factory == null) {
throw new ElasticsearchParseException("could not parse input for watch [{}]. unknown input type [{}]"; watchId; type);
}
input = factory.parseExecutable(watchId; parser);
} else {
throw new ElasticsearchParseException(
"could not parse input for watch [{}]. expected an object representing input [{}]; " + "but found [{}] instead";
