SolrJ 9.3 timeout when using http2, works with http

[Ing. Andrea Vettori]

Hello,
what can cause this issue ?

This times out

                solrServer = new Http2SolrClient.Builder(solrUrl)
                        .withRequestTimeout(SOLR_TIMEOUT_MINUTES, 
TimeUnit.MINUTES)
                        .withConnectionTimeout(SOLR_TIMEOUT_MINUTES, 
TimeUnit.MINUTES)
                        .withIdleTimeout(SOLR_TIMEOUT_MINUTES, TimeUnit.MINUTES)
                        .build();

This works well

                solrServer = new Http2SolrClient.Builder(solrUrl)
                        .useHttp1_1(true)
                        .withRequestTimeout(SOLR_TIMEOUT_MINUTES, 
TimeUnit.MINUTES)
                        .withConnectionTimeout(SOLR_TIMEOUT_MINUTES, 
TimeUnit.MINUTES)
                        .withIdleTimeout(SOLR_TIMEOUT_MINUTES, TimeUnit.MINUTES)
                        .build();

Just upgraded from 8.11 to 9.3 but always used older http client before.
Thanks

— 
Andrea Vettori