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From Robert Krüger <krue...@lesspain.de>
Subject Re: Possible to avoid hangs in org.apache.solr.handler.admin.SystemInfoHandler
Date Thu, 06 Aug 2015 08:25:42 GMT
Thanks for the instructions. I will do that.

Cheers,

Robert

On Wed, Aug 5, 2015 at 9:50 PM, Erick Erickson <erickerickson@gmail.com>
wrote:

> Robert:
>
> Just create a JIRA and submit it. It would be great if there were a
> test that illustrated this, but I'm not sure how that would be
> written. See: https://wiki.apache.org/solr/HowToContribute for the
> general bits on checking out code, creating and attaching patches and
> the like.
>
> Note that the naming conventions are SOLR-XXXX.patch and we use the
> same name for multiple versions.
>
> Best,
> Erick
>
> On Wed, Aug 5, 2015 at 2:52 PM, Robert Krüger <krueger@lesspain.de> wrote:
> > Just to follow up on this: Replacing getCanonicalHostName() by
> getHostName()
> > would solve the problem AFAICS and e.g. Logback does exactly that for
> > exactly the same purpose.
> >
> > http://logback.qos.ch/xref/ch/qos/logback/core/util/ContextUtil.html
> >
> > How do I submit a patch? Via this mailing list?
> >
> > Best regards,
> >
> > Robert
> >
> > On Wed, Aug 5, 2015 at 6:57 PM, Robert Krüger <krueger@lesspain.de>
> wrote:
> >>
> >>
> >> Hi,
> >>
> >> I am tracking down a problem with huge startup delays of a solr instance
> >> and tracked it down to this code in SystemInfoHandler:
> >>
> >>   private void init() {
> >>     try {
> >>       InetAddress addr = InetAddress.getLocalHost();
> >>       hostname = addr.getCanonicalHostName();
> >> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this is where it hangs
> >>     } catch (UnknownHostException e) {
> >>       //default to null
> >>     }
> >>   }
> >>
> >> The setup I have gives me no control over the local network
> configuration
> >> as solr is delivered as part of a larger software that users install on
> >> their machines and that has worked really well and it is technically
> fit for
> >> this purpose just as other no-sql stores or rdbmss. However, when our
> >> software users have problems like a reverse lookup not working because
> they
> >> work in a VPN environment (which in no other way affects the correct
> >> operation of solr) they currently have to wait a minute for solr startup
> >> (otherwise about a second) because two timeouts of these lookups
> happen, one
> >> when setting up the container, another for the core and that only to
> have
> >> the "host" info contain a name that was reverse-looked up.
> >>
> >> Would it be acceptable to submit a patch that allows this to be disabled
> >> overidden by a system property be acceptable? I.e. suppress the lookup
> and
> >> just use what can be retrieved about the host without a lookup (e.g.
> the ip
> >> address).
> >>
> >> Best regards,
> >>
> >> Robert
> >>
> >
> >
> >
> > --
> > Robert Krüger
> > Managing Partner
> > Lesspain GmbH & Co. KG
> >
> > www.lesspain-software.com
>
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>


-- 
Robert Krüger
Managing Partner
Lesspain GmbH & Co. KG

www.lesspain-software.com

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