Aeron Archive - extend existing recording

I have an Aeron Archive and want to extend the existing recording, i.e. that it continuse to append messages after the service restart.

I wasn't able to find any actual example how to do that, so I came with the my own code based on Aeron javadoc/Aeron Cookbook.

What I have so far

I'm trying to get the lastRecordingId, the position etc. from the archive itself first.

private void findLatestRecording() {
        final RecordingDescriptorConsumer consumer =
                (controlSessionId, correlationId, recordingId,
                        startTimestamp, stopTimestamp, startPosition,
                        stopPosition, initialTermId, segmentFileLength,
                        termBufferLength, mtuLength, sessionId,
                        streamId, strippedChannel, originalChannel,
                        sourceIdentity) ->  {
                    AeronArchiveJournal.this.lastRecordingId = recordingId;
                    AeronArchiveJournal.this.lastRecordingPosition = stopPosition;
                    AeronArchiveJournal.this.initialTermId = initialTermId;
                    AeronArchiveJournal.this.termBufferLength = termBufferLength;
                };

        final long fromRecordingId = 0L;
        final int recordCount = 100;
        final int foundCount = archive.listRecordingsForUri(fromRecordingId, recordCount, AeronChannels.ipc(), AeronStreams.STREAM_ID_JOURNAL, consumer);

        if (foundCount == 0) {
            LOG.info("No previous recording found, will start a new one");
        }
    }

then I'm trying to extend the recording

 private void extendExistingRecording() {
        publication = aeron.addExclusivePublication(AeronChannels.ipc(), AeronStreams.STREAM_ID_JOURNAL);

        String channelUri = new ChannelUriStringBuilder()
                .media(CommonContext.IPC_MEDIA)
                .initialPosition(lastRecordingPosition, initialTermId, termBufferLength)
                .build();

        LOG.info("Extending existing recording");
        LOG.info("Recording id: {}", lastRecordingId);
        LOG.info("Channel URI: {}", channelUri);


        archive.extendRecording(lastRecordingId, channelUri, AeronStreams.STREAM_ID_JOURNAL, SourceLocation.LOCAL);

        LOG.info("Waiting for recording to start for session {}", publication.sessionId());
        final CountersReader counters = aeron.countersReader();
        int counterId = RecordingPos.findCounterIdBySession(counters, publication.sessionId());

        while (CountersReader.NULL_COUNTER_ID == counterId) {
            journalIdleStrategy.idle();
            counterId = RecordingPos.findCounterIdBySession(counters, publication.sessionId());
        }
        lastRecordingId = RecordingPos.getRecordingId(counters, counterId);

    }

However the CountersReader loop never finishes and aeron prints following warning:

io.aeron.archive.client.ArchiveEvent: WARN - cannot extend recording 0 image.joinPosition=0 != rec.stopPosition=25312

Clearly I'm missing something, but so far I'm not able to figure out what.