Public bug reported:
Binary package hint: bootchart
Description: Ubuntu 8.04.1
Release: 8.04
bootchart:
Installed: 0.9-0ubuntu7
Candidate: 0.9-0ubuntu7
Version table:
*** 0.9-0ubuntu7 0
500 http://nl.archive.ubuntu.com hardy/main Packages
100 /var/lib/dpkg/status
The bug:
-----------
In /etc/init.d/stop-bootchart the line:
/usr/bin/java -jar /usr/share/bootchart/bootchart.jar
sometimes crashes with the following message:
Parsing /var/log/bootchart.tgz
Exception in thread "main" java.lang.NullPointerException
at org.bootchart.parser.linux.ProcStatParser.parseLog(Unknown Source)
at org.bootchart.Main.render(Unknown Source)
at org.bootchart.Main.main(Unknown Source)
Analysis:
-----------
I have traced this back to bootchart.jar actually having problems parsing the
log files in /var/log/bootchart.tgz where each time this occurs, one of the
three files lacks a complete record. The last line of such a file allways
contains an uptime entry and is not followed by the content of either
/proc/stat, /proc/diskstats, proc/*/stat of that moment.
It seems that the shell function "stop_bootchart()" in /etc/init.d/stop-
bootchart sometimes has a timing issue, where it kills the bootchart
logging right after the uptime is inserted in the log. On my Via C3
500MHz system, this situation seems to occur regularly, whereas on my
workstation this happened only three or four times in the last couple of
months.
Proposed solution:
------------------------
I'd like to propose a patch for
/usr/share/initramfs-tools/scripts/init-top/bootchart which basicly turns:
sed -e "s/ [0-9].*//;s/\.//" < /proc/uptime
cat /proc/stat
into:
sed -e "s/ [0-9].*//;s/\.//" < /proc/uptime | cat - /proc/stat
With this change I haven't had any bootchart generation failures
whatsoever.
** Affects: bootchart (Ubuntu)
Importance: Undecided
Status: New
--
bootchart.jar crashes on generated bootchart.tgz
https://bugs.launchpad.net/bugs/254954
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