Hi Eric, I submitted an initial patch for CHUKWA-734 with a bunch of issues in my comment as well. I've also taken time to read through as much documentation as possible and have a much better idea of data adaptors which essentially provide data to the agent(s). The Nagios work is very nice and I'll look at implementing this with my monitoring of Nutch logs. Thanks Lewis
On Sun, Feb 15, 2015 at 10:03 AM, Lewis John Mcgibbney < lewis.mcgibb...@gmail.com> wrote: > This is dynamite I checked out the source from svn and I have undertaken > initial analysis. Your hBase package looks like it inherits feom a nice > interface face plus your documentation is very helpful. > Thanks > > > On Sunday, February 15, 2015, Eric Yang <eric...@gmail.com> wrote: > >> Hi Lewis, >> >> There is an example in Chukwa to write errors out map reduce error to >> InError file, and send out Nagios alert. >> The example is in: >> src/main/java/org/apache/hadoop/chukwa/extraction/demux/DemuxManager.java >> >> Nagios support is updated in CHUKWA-735 to support better encryption for >> Nagios communication. >> >> Log4j Nagios appender maybe useful in CHUKWA-734. >> >> regards, >> Eric >> >> On Sat, Feb 14, 2015 at 1:31 PM, Lewis John Mcgibbney < >> lewis.mcgibb...@gmail.com> wrote: >> >>> https://issues.apache.org/jira/browse/CHUKWA-734 >>> >>> On Sat, Feb 14, 2015 at 12:13 PM, Lewis John Mcgibbney < >>> lewis.mcgibb...@gmail.com> wrote: >>> >>>> Hi Eric, >>>> Thank you for the feedback. >>>> This is more than helpful. >>>> I am going to write a Gora module for Chuckwa. >>>> I am going to progress on basis of implementing log monitor for Nutch. >>>> Can Chuckwa currently write to file and email response? >>>> Thanks >>>> Lewis >>>> >>>> [0] http://gora.apache.org >>>> >>>> On Sat, Feb 14, 2015 at 9:30 AM, Eric Yang <eric...@gmail.com> wrote: >>>> >>>>> Hi Lewis, >>>>> >>>>> Parse error can be captured and store errors to another HDFS >>>>> location. In Chukwa 0.4 and earlier, we have demux map reduce job which >>>>> does the extraction and store structured data in HDFS, and errors are >>>>> channel to another HDFS folder called InError, with the cause of the >>>>> parsing error. This is still a batch oriented operation. In Chukwa 0.6, >>>>> we can setup multiple pipeline writer. The pipeline writers can be >>>>> configured to provide parsing and channel error to somewhere else, if data >>>>> parse properly, then write it to HBase or HDFS. However, you will need to >>>>> write the pipeline writer class to extend this functionality. We >>>>> currently >>>>> only have a couple pipeline writers, LocalWriter, HBaseWriter, and >>>>> SeqFileWriter. SeqFileWriter needs to be the last one in the pipeline, if >>>>> you choose to write data to HDFS. See this page for how to configure >>>>> pipeline writer to achieve partially of what you are looking for: >>>>> >>>>> http://chukwa.apache.org/docs/r0.6.0/pipeline.html >>>>> >>>>> Hope this helps. >>>>> >>>>> regards, >>>>> Eric >>>>> >>>>> On Thu, Feb 12, 2015 at 11:12 PM, Lewis John Mcgibbney < >>>>> lewis.mcgibb...@gmail.com> wrote: >>>>> >>>>>> Hi Folks, >>>>>> For some time I have been meaning to get in touch to get advice on >>>>>> developing a tool for log analysis of Apache Nutch [0] logs. >>>>>> What I am referring to particularly is monitoring of logs in a bid to >>>>>> identify particular errors which we may anticipate. >>>>>> Nutch jobs are batch oriented in architecture which are inherited >>>>>> from Hadoop, we typically see errors in the parse phase of a crawl so it >>>>>> is >>>>>> events like this that I would like to anticipate, monitor and report on, >>>>>> possibly through email. >>>>>> So I am therefore thinking about building a Chuckwa-powered tool for >>>>>> Nutch which would become part of our codebase. >>>>>> Is Chukwa the right tool for this? Any information about similar >>>>>> efforts would be very much appreciated. >>>>>> best >>>>>> Lewis >>>>>> >>>>>> [0] http://nutch.apache.org >>>>>> >>>>>> -- >>>>>> *Lewis* >>>>>> >>>>> >>>>> >>>> >>>> >>>> -- >>>> *Lewis* >>>> >>> >>> >>> >>> -- >>> *Lewis* >>> >> >> > > -- > *Lewis* > > -- *Lewis*
