web UI hangs as app reads all old junitResult..xml files

10 views

Skip to first unread message

Kevin Goess

unread,

Sep 8, 2015, 1:33:28 PM9/8/15

to Jenkins Users

The first time we click on a link to see a build, the web UI hangs for about ten minutes. stracing the thread that's got 100% of the cpu shows that it's reading each one of the 500 junitResult.xml files:

...

open("/var/lib/jenkins/jobs/www/builds/42596/junitResult.xml", O_RDONLY) = 382

open("/var/lib/jenkins/jobs/www/builds/42595/build.xml", O_RDONLY) = 382

...

Each junitResult.xml file is about 17MB and takes about a second to load, so the 500 files take almost ten minutes to load the page.

Any subsequent page loads for that particular build are immediate, and jenkins doesn't go troll all the old junitResult.xml files. In fact loading that build again even while the first one is still doing its thing is immediate.

We're running v1.613. It seems like the change is recent-ish (last month or two?) but we can't tie it to any particular change.