Null returned instead of empty result in `InfluxQLQueryApi.query()`

[marcinkoziarz]

Steps to reproduce:

1. Start empty Influxdb instance
2. Create bucket named "myBucket"
3. Request list of elements InfluxQLQueryResult result = client.getInfluxQLQueryApi().query(new InfluxQLQuery("show field keys", "myBucket"));

Expected behavior: Code above should return empty result: result.getResults() should return an empty List.

Actual behavior: Code returns null, despite method query(...) being annotated @NonNull.

Specifications:

• Client Version: 7.1.0
• InfluxDB Version: v2.7.6
• JDK Version: openjdk 17.0.11 2024-04-16
• Platform: ArchLinux 6.9.5-arch1-1

I believe error is somewhere in AbstractQueryApi class, in bodyConsumer (lines 118+):

        BufferedSource source = body.source();

        while(source.isOpen() && !source.exhausted() && !cancellable.wasCancelled) {
          // consumer won't be executed when body is empty
          consumer.accept(cancellable, source);
        }

[bednar]

Hi @marcinkoziarz,

Thank you for reporting this issue. We will address it in PR #733.

Best regards