Post upgrading to 5.1 I was advised by Andrea Schweer to babysit the first run-through of media-filter as it converts new JPG thumbnails for all of the assets.
I notice that the media-filter process seems to have some sort of leak. Disk space in /tmp/ just keeps creeping up until the disk is full (mind you, it only had 2.8GB available to begin with – I need to alter some storage allocations). Aborting it (^C), causes the disk space to return to what it was when I started the process.
I had thought that possibly a reference to a file system-back object is not being explicitly dropped and is relying on garbage-collection to clean it up (although garbage-collection won’t get invoked when /tmp/ is running short of space). This is not the case, as when I use jconsole to force a GC on the media-filter process, the space does not reclaim, only the heap-space. So presumably the reference to it is still alive.
There are many sets of files in /tmp/ that are created, they look like: