Bug 964135

Summary: pmchart fails to plot an archive
Product: [Fedora] Fedora EPEL Reporter: Marko Myllynen <myllynen>
Component: pcp-guiAssignee: Nathan Scott <nathans>
Status: CLOSED NOTABUG QA Contact: Fedora Extras Quality Assurance <extras-qa>
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Version: el6CC: mgoodwin, myllynen, nathans
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Last Closed: 2013-08-05 02:12:35 UTC Type: Bug
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Example archives none

Description Marko Myllynen 2013-05-17 10:49:54 UTC 
Description of problem:
I'll attach three different archives, one for incoming traffic, one for outgoing traffic, and one containing both, all generated from the same CSV data. Using pminfo/pmval shows no differences for the corresponding metrics.

Opening csv-data-lan-out with "pmchart -t 1m -a csv-data-lan-out" and plotting csv_data_lan_out.test.lan_outbytes_linux.eth0.txbyt_s works as expected but opening csv-data-lan-both with "pmchart -t 1m -a csv-data-lan-both" and plotting csv_data_lan_both.test.lan_outbytes_linux.eth0.txbyt_s produces an empty view.

Version-Release number of selected component (if applicable):
pcp-3.8.0-1.el6.x86_64
pcp-gui-1.5.8-2.el6.x86_64
Comment 1 Marko Myllynen 2013-05-17 10:50:40 UTC 
Created attachment 749294 [details]
Example archives
Comment 2 Nathan Scott 2013-07-26 05:03:33 UTC 
| ... plotting csv_data_lan_both.test.lan_outbytes_linux.eth0.txbyt_s
| produces an empty view

It appears there is only a single value in the archive for this metric - is that expected?  It also has a timestamp that is for the final fetch group in the archive.

$ pmdumplog -z -a csv-data-lan-both | grep csv_data_lan_both.test.lan_outbytes_linux.eth0.txbyt_s
PMID: 245.0.12 (csv_data_lan_both.test.lan_outbytes_linux.eth0.txbyt_s)
23:59:00.000  245.0.12 (csv_data_lan_both.test.lan_outbytes_linux.eth0.txbyt_s): value 657803.87

pmchart is going to have a hard time working with a single data point.  Could this be a failure to import all the data you expected, Marko?  (and also, is it an archive that would be susceptible to the earlier log import issues around out-of-time-order records?)

thanks.
Comment 3 Nathan Scott 2013-08-05 02:12:35 UTC 
As per earlier comments, on closer inspection of the archive this appears to not be a bug.
Comment 4 Marko Myllynen 2013-08-05 15:55:32 UTC 
Hi Nathan,

yes, agreed, all the evidence suggests that this was also collateral damage of bug 958745.

Thanks.