On Tue, Feb 26, 2019 at 6:37 PM Lothruin Mirwen <lothruin.mir...@gmail.com>
wrote:
> Hi BookKeepers!
>
> I have an issue with DL LogReader.readNext(false) [ie: blocking]
>
> Such call should "block until return a record if there are records in the
> stream (aka catching up). Otherwise it would wait up to {@link
> DistributedLogConfiguration#getReadAheadWaitTime()} milliseconds and return
> null if there isn't any more records in the stream." (from javadoc).
>
> It normally works but with empty logs (no data ever written to DL/BK) it
> blocks forever. It seems that with no data it never "catchUp" and wait
> forever.
>
How do you create the empty logs? Did you just open a log writer without
writing records, or you use Namespace to create a log?
The difference is 1) first approach will have a log segment with zero
entries; 2) second approach might not even have any log segments.
I guess the difference between 1) and 2) cause the differences at handling
`readNext(false)`. If you can share more details about your setup, I have a
better idea of the direction at looking into the problem.
> As workaround I forcefully write a dummy record into the log. I'm missing
> something? Is there any missing configuration I need to provide to BK?
>
> Best regards
>
> Diego Salvi
>
