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From Hari Shreedharan <hshreedha...@cloudera.com>
Subject Re: Setting up flume to use ganglia results in a lot of error messages in /var/log/messages
Date Wed, 23 Jan 2013 22:14:07 GMT
I attached a patch to FLUME-1870. Can you guys give it a try and see if you are hitting the
issue now?  


Hari  

--  
Hari Shreedharan


On Wednesday, January 23, 2013 at 1:38 PM, Hari Shreedharan wrote:

> Looks like this is happening because for certain metrics which cannot be converted into
float (for example strings), we are sending the type as float, causing Ganglia to log those
messages. I think it should be fairly easy to write a patch to fix this. I filed FLUME-1870
to track this.  
>  
>  
> Thanks,
> Hari
>  
> --  
> Hari Shreedharan
>  
>  
> On Wednesday, January 23, 2013 at 1:23 PM, Mike Percy wrote:
>  
> > Not sure when or how it broke, as I know of people using it in production. There
is a way to configure it for different versions of Ganglia, like 3.0, 3.1. Might be worth
trying both values to see if it's a problem with one or the other: http://flume.apache.org/FlumeUserGuide.html#ganglia-reporting
> >  
> >  
> > On Wed, Jan 23, 2013 at 1:12 PM, Connor Woodson <cwoodson.dev@gmail.com (mailto:cwoodson.dev@gmail.com)>
wrote:
> > > I have not had success with Ganglia, due to the same issue I think as you've
encountered.
> > >  
> > > - Connor
> > >  
> > >  
> > > On Wed, Jan 23, 2013 at 6:04 AM, Christian Schroer <cschroer@autoscout24.com
(mailto:cschroer@autoscout24.com)> wrote:
> > > > Hi,
> > > >  
> > > > i have the same problem here, using Flume-NG 1.2 from CDH4.1.2.
> > > > I deleted all related RRDs, gmetad recreates them and i see those errors
again.
> > > >  
> > > > Disk space, inodes, ... are fine. All RRDs not related to Flume-NG are
fine, too.
> > > >  
> > > > These errors result in a gmetad crash after while (more metrics =>
earlier crash). If I disable ganglia support gmetad runs without any problem.
> > > >  
> > > > Regards
> > > > Christian
> > > >  
> > > > -----Urspr√ľngliche Nachricht-----
> > > > Von: Alexander Alten-Lorenz [mailto:wget.null@gmail.com]
> > > > Gesendet: Mittwoch, 12. Dezember 2012 15:43
> > > > An: user@flume.apache.org (mailto:user@flume.apache.org)
> > > > Betreff: Re: Setting up flume to use ganglia results in a lot of error
messages in /var/log/messages
> > > >  
> > > > Looks like the RRD's are damaged, maybe the harddisk full?
> > > >  
> > > > - Alex
> > > >  
> > > > On Dec 12, 2012, at 11:38 AM, Juhani Connolly <juhani_connolly@cyberagent.co.jp
(mailto:juhani_connolly@cyberagent.co.jp)> wrote:
> > > >  
> > > > > We just noticed that ganglia's gmetad is spamming messages like the
following
> > > > >
> > > > > Dec  9 03:13:20 om-pat-obs01 /usr/sbin/gmetad[17407]: RRD_update
(/var/lib/ganglia/rrds/Flume KDDI/blog-wap02/flume.SINK.avro2.Type.rrd): /var/lib/ganglia/rrds/Flume
KDDI/blog-wap02/flume.SINK.avro2.Type.rrd: conversion of 'SINK' to float not complete: tail
'SINK'
> > > > > Dec  9 03:13:20 om-pat-obs01 /usr/sbin/gmetad[17407]: RRD_update
(/var/lib/ganglia/rrds/Flume KDDI/blog-wap02/flume.CHANNEL.ch1.Type.rrd): /var/lib/ganglia/rrds/Flume
KDDI/blog-wap02/flume.CHANNEL.ch1.Type.rrd: conversion of 'CHANNEL' to float not complete:
tail 'CHANNEL'
> > > > > Dec  9 03:13:20 om-pat-obs01 /usr/sbin/gmetad[17407]: RRD_update
(/var/lib/ganglia/rrds/Flume KDDI/blog-wap11/flume.SINK.avro1.Type.rrd): /var/lib/ganglia/rrds/Flume
KDDI/blog-wap11/flume.SINK.avro1.Type.rrd: conversion of 'SINK' to float not complete: tail
'SINK'
> > > > > Dec  9 03:13:20 om-pat-obs01 /usr/sbin/gmetad[17407]: RRD_update
(/var/lib/ganglia/rrds/Flume KDDI/blog-wap11/flume.SOURCE.scribe.Type.rrd): /var/lib/ganglia/rrds/Flume
KDDI/blog-wap11/flume.SOURCE.scribe.Type.rrd: conversion of 'SOURCE' to float not complete:
tail 'SOURCE'
> > > > >
> > > > > The counters are tracked fine on the web interface, but we've had
issues(gmetad crashing or not starting up, I'm still trying to get specifics from the responsible
people). I can't say for sure if this is a ganglia problem or a problem with flumes ganglia
support. Anyone else feeding their counters to ganglia getting similar? Perhaps the ganglia
ml may be more appropriate, not sure on this one.
> > > >  
> > > > --
> > > > Alexander Alten-Lorenz
> > > > http://mapredit.blogspot.com
> > > > German Hadoop LinkedIn Group: http://goo.gl/N8pCF
> > > >  
> > >  
> >  
>  


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