ArcadeDB Version: 21.9.1-SNAPSHOT

JDK Version: N/A

OS: N/A

Expected behavior

if the portal is null, the "no data" message should be written to the channel

Actual behavior

the "no data" is sent to the channel, but also a NPE is raised because also a writeCommandComplete() is executed.

      if (portal == null) {
        writeNoData();
        writeCommandComplete(portal.query, portal.cachedResultset == null ? 0 : portal.cachedResultset.size());

I think that we could just drop the writeCommandComplete() statement.