JdbcIO.readAll not firing results - google-cloud-dataflow

Question

I'm working with Apache Beam, trying to enrich data (based on this), but it seems that Beam has changed in a while, as GroupByKey does not work with unbounded sources (like PubSub) without windowing.
This is what I've got (overly simplified):
PCollection<String> input = pipeline.apply("Read pubsub",
PubsubIO.readStrings().fromTopic(options.getInputTopic()))
.apply("Log element", ParDo.of(new DoFn<String, String>() {
#ProcessElement
public void processElement(ProcessContext c) {
System.out.println(String.format("incomig %s", c.element()));
c.output(c.element());
}
}))
.apply(Window.into(FixedWindows.of(Duration.standardSeconds(5))));
PCollection<KV<String, String>> incomingData = input
.apply("Apply Random Key", MapElements
.via(new SimpleFunction<String, KV<String, String>>() {
public KV<String, String> apply(String json) {
JSONObject jsonObject = new JSONObject(json);
System.out.println(String.format("JSON: %s, %s", jsonObject.getString("id"), jsonObject.get("usageRules")));
return KV.of(jsonObject.getString("id"), json);
}
})
);
PCollection<KV<String,String>> enrichedData = incomingData
.apply("Search in db",
JdbcIO.<KV<String,String>, KV<String,String>>readAll()
.withDataSourceConfiguration(config)
.withQuery("SELECT * FROM myTable WHERE id = ?")
.withParameterSetter((element, preparedStatement) ->
preparedStatement.setString(1, element.getKey())
)
.withRowMapper(resultSet -> {
System.out.println(String.format("Result from db: %s", resultSet.getString("id")));
return KV.of(resultSet.getString("id"), resultSet.getString("id"));
})
.withCoder(KvCoder.of(StringUtf8Coder.of(), StringUtf8Coder.of())));
GroupByKey.applicableTo(enrichedData);
TupleTag<String> CREATE_TAG = new TupleTag<>();
TupleTag<String> UPDATE_TAG = new TupleTag<>();
KeyedPCollectionTuple
.of(CREATE_TAG, incomingData)
.and(UPDATE_TAG, enrichedData)
.apply("Combine", CoGroupByKey.create())
.apply("Show data?", ParDo.of(new DoFn<KV<String, CoGbkResult>, String>() {
#ProcessElement
public void processElement(ProcessContext context) {
System.out.println("Print from CoGbkResult");
System.out.println(context.element().getKey());
System.out.println(context.element().getValue());
}
}));
At the moment, with windowing, getting incoming data, transforming it into JSONObject and searching in BD is working fine, the problem is that any .apply done after the JdbcIO.readAll is not working at all. The line "Print from CoGbkResult" just doesn't get printed at all.
I've tried modifying the window, adding other triggers, trying just to output a result just immediately, but it just stop at the RowMapper.
Thanks for your help