TimeValue error on XContentBuilder

Elastic Stack Elasticsearch
1

Getting IllegalArgumentException ("cannot write xcontent for unknown value of type TimeValue") even though org.Elasticsearch.common.unit.TimeValue is an elastic class and is used in org.Elasticsearch.search.builder.PointInTimeBuilder.keepAlive.
This is with version 7.12.1 of Elasticsearch.

2

It's really not clear what this is about.
When are you getting this error exactly?
What API requests are you making?
What is the full response you are getting from Elasticsearch?

3

Using the RestHighLevelClient.search passing in a search request that has a PointInTimeBuilder with a keepAlive of a TimeValue. Getting the IllegalArgumentException in the java code where it is converting the search to XContent.
This is using the PointInTimeBuilder: PointInTimeBuilder (server 7.10.1 API)
Passing in a keepAlive TimeValue: org.Elasticsearch.common.unit.TimeValue

The XContentBuilder is throwing an IllegalArgumentException trying to convert the TimeValue to XContent.

From PointInTimeBuilder:

    @Override
    public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
        builder.startObject(SearchSourceBuilder.POINT_IN_TIME.getPreferredName());
        builder.field(ID_FIELD.getPreferredName(), encodedId);
        if (keepAlive != null) {
            builder.field(KEEP_ALIVE_FIELD.getPreferredName(), keepAlive);
        }
        builder.endObject();
        return builder;
    }

From XContentBuilder:

    private void unknownValue(Object value, boolean ensureNoSelfReferences) throws IOException {
        if (value == null) {
            this.nullValue();
        } else {
            XContentBuilder.Writer writer = (XContentBuilder.Writer)WRITERS.get(value.getClass());
            if (writer != null) {
                writer.write(this, value);
            } else if (value instanceof Path) {
                this.value((Path)value);
            } else if (value instanceof Map) {
                Map<String, ?> valueMap = (Map)value;
                this.map(valueMap, ensureNoSelfReferences, true);
            } else if (value instanceof Iterable) {
                this.value((Iterable)value, ensureNoSelfReferences);
            } else if (value instanceof Object[]) {
                this.values((Object[])value, ensureNoSelfReferences);
            } else if (value instanceof ToXContent) {
                this.value((ToXContent)value);
            } else {
                if (!(value instanceof Enum)) {
                    throw new IllegalArgumentException("cannot write xcontent for unknown value of type " + value.getClass());
                }

                this.value(Objects.toString(value));
            }

        }
    }

To temp fix this, I had to extend TimeValue implemented ToXContent.

4

Interestingly, in a different environment an XContentBuilderExtension is found for TimeValue. Any clue why that would exist in one env and not in another even thought they are both using 7.12.1?

5

In case it gives a clue, I noticed that the package name changed in a recent version...
May be check your imports?

6

I checked my maven dependency:tree and all ES dependencies are 7.12.1.

7

And your Elasticsearch version is also 7.12.1?

Could you run a simple test with 7.17.1 as this might have been fixed since then.

8

I can't test that, it changes too much (Geo, Polygon builders, etc). That said, the version of TimeValue went away starting in 7.16. The package changes. I would hope that a fix was introduced at that time.

9

This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.