Here is a comment from the Upstart changelog which attempts to explain
the scenario leading to the out-of-memory condition:
* init/job.c: job_new(): Fix for nasty OOM scenario when an attempt is
made
to start a chroot job with same name as running single-instance
non-chroot
job. Previously, the path for a chrooted Job was set from the (nul)
instance
name of its parent JobClass. However, since that job instance name
already
existed outside the chroot and was already D-Bus registered,
nih_dbus_object_new() (which allocates storage and is called by
job_register()) returned NULL and kept doing so due to being called
within NIH_MUST(). This resulted in OOM due to an as-yet unidentified
D-Bus bug (possibly a leak in find_subtree_recurse()).
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https://bugs.launchpad.net/bugs/728531
Title:
chroot support is not reliable
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