Graph of the Day: Crash Report Metadata
When Firefox crashes, it submits a minidump of the crash; it also submits some key/value metadata. The metadata includes basic information about the product/version/buildid, but it also includes a bunch of other information that we use to group, correlate, and diagnose crashes. Using data collected with jydoop, I created a graph of how frequently various metadata keys were submitted on various platforms:
The jydoop script to collect this data is simple:
import crashstatsutils
import json
import jydoop
setupjob = crashstatsutils.dosetupjob([('meta_data', 'json'), ('processed_data', 'json')])
def map(k, meta_data, processed_data, context):
if processed_data is None:
return
try:
meta = json.loads(meta_data)
processed = json.loads(processed_data)
except:
context.write('jsonerror', 1)
return
product = meta['ProductName']
os = processed.get('os_name', None)
if os is None:
return
context.write((product, os, '$total'), 1)
for key in meta:
context.write((product, os, key), 1)
combine = jydoop.sumreducer
reduce = jydoop.sumreducer
If you are interested in learning what each piece of metadata means and is used for, I’ve started to document them on the Mozilla docs site.
This graph was generated using the flot JS library and the code is available on github.
April 12th, 2013 at 2:08 pm
“Comments” is interesting — it would appear that OS X users are ~4x more likely to enter a comment than Windows users?
*checks CSV data*
Indeed, 3.96% vs 1.05%. Curious.
April 12th, 2013 at 2:30 pm
I suspect that is because 35/40% of our Windows reports are plugin crashes which users were not able to comment on until FF21.