With some Mp3 files, Tika does not return but will use 100% CPU. Memory consumption remains constant.
More details about the file (returned by /usr/bin/file command):
MPEG ADTS, layer III, v2, 32 kbps, 22.05 kHz, Monaural
The problem can be reproduce by simply running:
java -jar tika-app-1.4.jar https://dl.dropboxusercontent.com/u/4508166/tika/taliban.mp3
DISCLAIMER: this mp3 file is a real life example extracted from the Enron email corpus (public domain?). The humoristic content or the name of this file are not meant to propagate any political views.