Java version - jdk1.8.0_201

We are running a Tomcat Http2 Server and a Jetty http2 client.

When we send the 1st request from jetty client to tomcat server with streamId as 2147483641, the 1st response from tomcat comes after almost 5 seconds.

After further debugging we got to know that the problem seems to be because of the below code in Http2UpgradeHandler class:

private void closeIdleStreams(int newMaxActiveRemoteStreamId) throws Http2Exception 
{
         for (int i = maxActiveRemoteStreamId + 2; i < 
                                newMaxActiveRemoteStreamId; i += 2) 
            {

             Stream stream = getStream(i, false);
             if (stream != null) {
                 stream.closeIfIdle();
             }
         }
         maxActiveRemoteStreamId = newMaxActiveRemoteStreamId;
     }

When we take 1st StreamId as 2147483641, the above loop takes around 4~5 seconds to execute and hence, the response is delayed.