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Posted to users@kafka.apache.org by Ross Black <ro...@gmail.com> on 2012/06/01 02:59:06 UTC

Re: Anything common gotchas we should add to the FAQ?

I just fell into the trap of using:

        Properties props = new Properties();
        props.put("compression.codec", 2);
        ProducerConfig config = new ProducerConfig(props);

instead of

        props.put("compression.codec", "2");

or (better because it forces a string)

        props.setProperty("compression.codec", "2");

Using an int value means that no compression occurs, and no errors/warnings
are emitted.

Ross



On 30 May 2012 13:45, Jun Rao <ju...@gmail.com> wrote:

> Another thing is that if zk namespace is used, the namespace needs to be
> create manually using ZK client shell first.
>
> Thanks,
>
> Jun
>
> On Tue, May 29, 2012 at 8:01 AM, Jay Kreps <ja...@gmail.com> wrote:
>
> > There was a question about getting the exception when the consumer
> doesn't
> > have any metadata, which is normal. I was going to document that.
> Anything
> > else I should add?
> >
> > -Jay
> >
>

Re: Anything common gotchas we should add to the FAQ?

Posted by Jay Kreps <ja...@gmail.com>.

Hmm, Ross, that actually sounds more like a bug. Rather than fix it, I
think we should just get rid of these numeric codes entirely, they are
pretty obscure. I filed
  https://issues.apache.org/jira/browse/KAFKA-363

Should be a pretty easy one to fix...

-Jay

On Thu, May 31, 2012 at 5:59 PM, Ross Black <ro...@gmail.com> wrote:

> I just fell into the trap of using:
>
>        Properties props = new Properties();
>        props.put("compression.codec", 2);
>        ProducerConfig config = new ProducerConfig(props);
>
> instead of
>
>        props.put("compression.codec", "2");
>
> or (better because it forces a string)
>
>        props.setProperty("compression.codec", "2");
>
> Using an int value means that no compression occurs, and no errors/warnings
> are emitted.
>
> Ross
>
>
>
> On 30 May 2012 13:45, Jun Rao <ju...@gmail.com> wrote:
>
> > Another thing is that if zk namespace is used, the namespace needs to be
> > create manually using ZK client shell first.
> >
> > Thanks,
> >
> > Jun
> >
> > On Tue, May 29, 2012 at 8:01 AM, Jay Kreps <ja...@gmail.com> wrote:
> >
> > > There was a question about getting the exception when the consumer
> > doesn't
> > > have any metadata, which is normal. I was going to document that.
> > Anything
> > > else I should add?
> > >
> > > -Jay
> > >
> >
>