incubator-chukwa-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Stuti Awasthi <Stuti_Awas...@persistent.co.in>
Subject RE: Problem in ChukwaRecord file contents
Date Thu, 10 Jun 2010 05:02:28 GMT
Currently I am using FileTailing Adapter. I will try with CharFileTailingAdaptorUTF8.

-----Original Message-----
From: Ariel Rabkin [mailto:asrabkin@gmail.com] 
Sent: Thursday, June 10, 2010 3:13 AM
To: chukwa-user@hadoop.apache.org
Subject: Re: Problem in ChukwaRecord file contents

Yes, CharFileTailingAdaptorUTF8 is designed to do one line per record.
If it does more than that, it's a bug.

--Ari

On Wed, Jun 9, 2010 at 8:00 AM, Corbin Hoenes <corbin@tynt.com> wrote:
> Gerrit -
> It's my understanding that the CharFileTailingAdaptorUTF8 sends only 1 line
> per record.  Why can't Stuti just use this?
> On Jun 8, 2010, at 7:55 AM, Gerrit Jansen van Vuuren wrote:
>
> Have a look at:
>
>
> org.apache.hadoop.chukwa.datacollection.adaptor.filetailer.LWFTAdaptor
>
> protected int extractRecords(ChunkReceiver eq, long buffOffsetInFile,
>       byte[] buf) throws InterruptedException {
>
>
> org.apache.hadoop.chukwa.datacollection.adaptor.filetailer.CharFileTailingAdaptorUTF8
> protected int extractRecords(ChunkReceiver eq, long buffOffsetInFile,
>       byte[] buf) throws InterruptedException {
>
> If you need one line per record you'd have to write your own adaptor. Maybe
> subclass CharFileTailingAdaptorUTF8
>
>
>
> From: Stuti Awasthi [mailto:Stuti_Awasthi@persistent.co.in]
> Sent: Tuesday, June 08, 2010 1:31 PM
> To: chukwa-user@hadoop.apache.org; Gerrit van Vuuren
> Subject: RE: Problem in ChukwaRecord file contents
>
> So is  that means that we will always have several lines of log data in the
> <body> tag of chukwa record?
>  Can you please tell me where is that agent code that defines this.
>
> I have read these ChukwaRecord through Map Reduce and can read the original
> log lines. J
>
> Stuti
>
> From: Gerrit Jansen van Vuuren [mailto:gvanvuuren@specificmedia.com]
> Sent: Tuesday, June 08, 2010 5:53 PM
> To: chukwa-user@hadoop.apache.org
> Subject: RE: Problem in ChukwaRecord file contents
>
> Each chukwa record will contain several lines of log data (depending on how
> the agent defines lines J ).
>
> You can use the MapReduce Jobs, HDFS or Pig to read these files.  You might
> need to do some coding though.
>
> I use pig to read to chukwa files and then to get the original log lines I
> output the data column (i.e. these original records) using a pig BinStorage.
>
> Have a look at
>  com.specificmedia.hadoop.logimport.demux.chukwa.ChukwaArchive() and the
> other chukwa-core classes.
>
> Hope this helps.
>
>
> Cheers,
>
>
>
> From: Stuti Awasthi [mailto:Stuti_Awasthi@persistent.co.in]
> Sent: Tuesday, June 08, 2010 12:51 PM
> To: chukwa-user@hadoop.apache.org
> Subject: Problem in ChukwaRecord file contents
>
> Hi All,
>
> I gave my log file as input to chukwa and converted it to .evt file i.e.
> ChukwaRecord file
> I checked the ChukwaRecord file which is a sequence file with
> ChukwaRecordKey and ChukwaRecord.
> I saw that the ChukwaRecord contains Timestamp and some other fields. One of
> them is the "body" field.
> However, this body field of each record contains a bunch of lines (from my
> original log file).
>
> Contents of Original log file:
>
> May 29 13:00:16 ps3156 syslogd 1.5.0#5ubuntu3: restart.
> May 29 13:00:16 ps3156 anacron[4148]: Job `cron.daily' terminated
> May 29 13:00:16 ps3156 anacron[4148]: Normal exit (1 job run)
> May 29 13:09:02 ps3156 /USR/SBIN/CRON[19815]: (root) CMD (  [ -x
> /usr/lib/php5/maxlifetime ] && [ -d /var/lib/php5 ] && find /var/lib/php5/
> -type f -cmin +$(/usr/lib/php5/maxlifetime) -print0 | xargs -n 200 -r -0 rm)
> May 29 13:09:02 ps3156 /USR/SBIN/CRON[19815]: (root) CMD (  [ -x
> /usr/lib/php5/maxlifetime ] && [ -d /var/lib/php5 ] && find /var/lib/php5/
> -type f -cmin +$(/usr/lib/php5/maxlifetime) -print0 | xargs -n 200 -r -0 rm)
>
>
> Contents of ChukwaRecord file:
>
> {"DataType": "SysLog", "Key":
> "1275118200000/ps3156.persistent.co.in/1275118216000", "Timestamp":
> 1275118216000, "mapFields": {"csource": "ps3156.persistent.co.in", "capp":
> "/home/hadoop/Test/syslog_test", "ctags": " cluster="chukwa"", "body": "May
> 29 13:00:16 ps3156 syslogd 1.5.0#5ubuntu3: restart.
> May 29 13:00:16 ps3156 anacron[4148]: Job `cron.daily' terminated
> May 29 13:00:16 ps3156 anacron[4148]: Normal exit (1 job run)
> May 29 13:09:02 ps3156 /USR/SBIN/CRON[19815]: (root) CMD (  [ -x
> /usr/lib/php5/maxlifetime ] && [ -d /var/lib/php5 ] && find /var/lib/php5/
> -type f -cmin +$(/usr/lib/php5/maxlifetime) -print0 | xargs -n 200 -r -0 rm)
> May 29 13:09:02 ps3156 /USR/SBIN/CRON[19815]: (root) CMD (  [ -x
> /usr/lib/php5/maxlifetime ] && [ -d /var/lib/php5 ] && find /var/lib/php5/
> -type f -cmin +$(/usr/lib/php5/maxlifetime) -print0 | xargs -n 200 -r -0 rm)
> } }
>
> I can see that each record in the ChukwaRecord file contains a chunk of
> lines from the original log file. Is this behavior correct?
> According to my understanding, each record in the ChukwaRecord file should
> contain only one line from the original log file.
> Is it possible to create such a ChukwaRecord file?
> Please suggest.
>
>
> Stuti
>
> DISCLAIMER ========== This e-mail may contain privileged and confidential
> information which is the property of Persistent Systems Ltd. It is intended
> only for the use of the individual or entity to which it is addressed. If
> you are not the intended recipient, you are not authorized to read, retain,
> copy, print, distribute or use this message. If you have received this
> communication in error, please notify the sender and delete all copies of
> this message. Persistent Systems Ltd. does not accept any liability for
> virus infected mails.
>
> DISCLAIMER ========== This e-mail may contain privileged and confidential
> information which is the property of Persistent Systems Ltd. It is intended
> only for the use of the individual or entity to which it is addressed. If
> you are not the intended recipient, you are not authorized to read, retain,
> copy, print, distribute or use this message. If you have received this
> communication in error, please notify the sender and delete all copies of
> this message. Persistent Systems Ltd. does not accept any liability for
> virus infected mails.
>



-- 
Ari Rabkin asrabkin@gmail.com
UC Berkeley Computer Science Department

DISCLAIMER
==========
This e-mail may contain privileged and confidential information which is the property of Persistent
Systems Ltd. It is intended only for the use of the individual or entity to which it is addressed.
If you are not the intended recipient, you are not authorized to read, retain, copy, print,
distribute or use this message. If you have received this communication in error, please notify
the sender and delete all copies of this message. Persistent Systems Ltd. does not accept
any liability for virus infected mails.

Mime
View raw message