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From "Andrei Dulceanu (JIRA)" <j...@apache.org>
Subject [jira] [Created] (OAK-6737) Standby server should send timely responses to all client requests
Date Thu, 28 Sep 2017 06:56:00 GMT
Andrei Dulceanu created OAK-6737:

             Summary: Standby server should send timely responses to all client requests
                 Key: OAK-6737
                 URL: https://issues.apache.org/jira/browse/OAK-6737
             Project: Jackrabbit Oak
          Issue Type: Improvement
          Components: segment-tar, tarmk-standby
            Reporter: Andrei Dulceanu
            Assignee: Andrei Dulceanu
            Priority: Minor
             Fix For: 1.8, 1.7.9

Currently all the {{GetXXXRequestHandler}} (where XXX stands for Blob, Head, References and
Segment), on the server discard client requests which cannot be satisfied (i.e. the requested
object does not exist (yet) on the server). A more transparent approach would be to timely
respond to all client requests, clearly stating that the object was not found. This would
improve a lot debugging for example, because all requests and their responses could be easily
followed from the client log, without needing to know what actually happened on the server.

Below, a possible implementation for {{GetHeadRequestHandler}}, suggested by [~frm] in a comment
on OAK-6678:

String id = reader.readHeadRecordId();

if (id == null) {
    ctx.writeAndFlush(new NotFoundGetHeadResponse(msg.getClientId(), id));

ctx.writeAndFlush(new GetHeadResponse(msg.getClientId(), id));

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