EVALUATION

when we pack/unpack unbundles in fast debug build, the unpack200.exe output a bundle of output to the stdout:

bit length overflow
code 4 bits 6->7

bit length overflow
code 5 bits 6->7

...

unpack200 will complete successfully. but when we invoke it via Runtime.getRuntime.Exec, if it is printing substantial output to its stdout or stderr streams, p.waitFor on the forked process will hang.

this is a known issue and the solution is to read in the forked process output stream in the background:
http://java.sun.com/j2se/1.3/relnotes-solaris.html#product-notes