Reader: HasMessageAvailableAsync returns True but ReadNextAsync never returns when using StartMessageFromRollbackDuration

I am not sure if this is a Pulsar issue or issue with Pulsar.Client. Hoping someone can help point me in the right direction!

The below function works perfectly when using StartMessageId(MessageId.Earliest). If I try to use StartMessageFromRollbackDuration like below, the HasMessageAvailableAsync() will return true but then the ReadNextAsync will block indefinitely, never returning a message. There is only one message in the queue at the time this runs, if that helps as well.

{
    TimeSpan rollbackDuration = DateTime.Now - startReadtime;
    await using IReader<byte[]> reader = await _readerBuilder
        .StartMessageFromRollbackDuration(rollbackDuration)
        //.StartMessageId(MessageId.Earliest)
        .CreateAsync();

        while (await reader.HasMessageAvailableAsync())
        {
            Message<byte[]> received = await reader.ReadNextAsync();

            if (CheckMessage(received, messageCheck))
            {
                return true;
            }
        }              

    return false;
}

Here are the logs from my Standalone Pulsar image running in Docker from the point of creating the read to attempting to read the next:

20:05:18.932 [pulsar-io-51-2] INFO org.apache.pulsar.broker.service.ServerCnx - [/192.168.176.8:33082] Subscribing on topic persistent://public/default/block-schedule-activity / reader-9b5a98d18f 20:05:18.934 [pulsar-io-51-2] INFO org.apache.pulsar.broker.service.persistent.PersistentTopic - [persistent://public/default/block-schedule-activity][reader-9b5a98d18f] Creating non-durable subscription at msg id null 20:05:18.934 [pulsar-io-51-2] INFO org.apache.bookkeeper.mledger.impl.NonDurableCursorImpl - [public/default/persistent/block-schedule-activity] Created non-durable cursor read-position=10:1 mark-delete-position=10:0 20:05:18.934 [pulsar-io-51-2] INFO org.apache.bookkeeper.mledger.impl.ManagedLedgerImpl - [public/default/persistent/block-schedule-activity] Opened new cursor: NonDurableCursorImpl{ledger=public/default/persistent/block-schedule-activity, ackPos=10:0, readPos=10:1} 20:05:18.973 [bookkeeper-ml-workers-OrderedExecutor-1-0] INFO org.apache.pulsar.broker.service.persistent.PersistentMessageFinder - [persistent://public/default/block-schedule-activity][reader-9b5a98d18f] Found position 10:0 closest to provided timestamp 1594238715935 20:05:18.973 [bookkeeper-ml-workers-OrderedExecutor-1-0] INFO org.apache.pulsar.broker.service.persistent.PersistentSubscription - [persistent://public/default/block-schedule-activity][reader-9b5a98d18f] Successfully disconnected consumers from subscription, proceeding with cursor reset 20:05:18.973 [bookkeeper-ml-workers-OrderedExecutor-1-0] INFO org.apache.bookkeeper.mledger.impl.ManagedCursorImpl - [public/default/persistent/block-schedule-activity] Initiate reset position to 10:1 on cursor reader-9b5a98d18f 20:05:18.975 [bookkeeper-ml-workers-OrderedExecutor-1-0] INFO org.apache.bookkeeper.mledger.impl.ManagedCursorImpl - [public/default/persistent/block-schedule-activity] reset position to 10:1 before current read position 10:1 on cursor reader-9b5a98d18f 20:05:18.976 [bookkeeper-ml-workers-OrderedExecutor-1-0] INFO org.apache.bookkeeper.mledger.impl.ManagedCursorImpl - [public/default/persistent/block-schedule-activity-reader-9b5a98d18f] Rewind from 10:1 to 10:1 20:05:18.976 [bookkeeper-ml-workers-OrderedExecutor-1-0] INFO org.apache.pulsar.broker.service.persistent.PersistentTopic - [persistent://public/default/block-schedule-activity] There are no replicated subscriptions on the topic 20:05:18.976 [bookkeeper-ml-workers-OrderedExecutor-1-0] INFO org.apache.pulsar.broker.service.persistent.PersistentTopic - [persistent://public/default/block-schedule-activity][reader-9b5a98d18f] Created new subscription for 1 20:05:18.976 [bookkeeper-ml-workers-OrderedExecutor-1-0] INFO org.apache.pulsar.broker.service.ServerCnx - [/192.168.176.8:33082] Created subscription on topic persistent://public/default/block-schedule-activity / reader-9b5a98d18f 20:05:30.334 [SyncThread-7-1] INFO org.apache.bookkeeper.bookie.EntryLogManagerBase - Creating a new entry log file because current active log channel has not initialized yet 20:05:30.339 [SyncThread-7-1] INFO org.apache.bookkeeper.bookie.EntryLoggerAllocator - Created new entry log file data/standalone/bookkeeper0/current/0.log for logId 0. 20:05:30.342 [pool-5-thread-1] INFO org.apache.bookkeeper.bookie.EntryLoggerAllocator - Created new entry log file data/standalone/bookkeeper0/current/1.log for logId 1. 20:05:40.046 [pulsar-web-69-5] INFO org.eclipse.jetty.server.RequestLog - 127.0.0.1 - - [08/Jul/2020:20:05:40 +0000] “GET /admin/v2/persistent/public/functions/coordinate/stats?getPreciseBacklog=false HTTP/1.1” 200 1278 “-” “Pulsar-Java-v2.6.0” 1

[Lanayx]

Seems to be the same issue as https://github.com/apache/pulsar/issues/10515

[JarrodJ83]

I will try to put that together. Thanks!