dump-file limits to 2gb
With such config stream.mp3 grows to 2147483647 bytes (2GB-1byte) and stops. Server proceed without problems.
<mount>
<mount-name>/stream</mount-name>
<dump-file>/home/user/dump/stream.mp3</dump-file>
</mount>
icecast 2.3.1 gentoo linux pentium4