When using the sshexec task to run remote commands, I sometimes get the
following error message:

Remote command failed with exit status -1

Running the command manually through an ssh connection yields no error and an
exit status of 0. Several other people have run into the same issue in this thread:
http://www.mail-archive.com/user@ant.apache.org/msg28578.html

There is a proposed patch included in the email thread that fixed the problem
for some people. Hopefully we can get it into a future Ant release. For now I
have to set failonerror=false in all of our sshexec calls. When there is a real
error our scripts won't be able to detect it and handle it gracefully.