bitten-slave stuck after executing shell script

[d.misev@…]

All goes fine with the build, until a step tries to execute a ​script that starts a server.

The recipe step:

<step id="start server" onerror="ignore" timeout="60">
  <sh:exec file="/tmp/rasdaman_inst/bin/start_rasdaman.sh"/>
</step>

On the server where bitten-slave executes the build I can verify that the server is successfully started, but the build is still stuck at this step.

The log from bitten-slave ends with a bunch of keepalive messages:

[DEBUG   ] Sending POST request to 'http://kahlua.eecs.jacobs-university.de/trac/rasdaman/builds/933/steps/'
[INFO    ] Executing build step 'start server', onerror = ignore
[DEBUG   ] Executing <function exec_ at 0x2cc7500> with arguments: {'file_': '/tmp/rasdaman_inst/bin/start_rasdaman.sh'}
[DEBUG   ] Executing ['/tmp/rasdaman_inst/bin/start_rasdaman.sh'], (pid = 11526, timeout = None)
[INFO    ] start_rasdaman.sh: starting rasdaman server complex...
[INFO    ] Using error text file: /tmp/rasdaman_inst/share/rasdaman//errtxts
[INFO    ] rasmgr: rasdaman server manager tool. rasdaman osgeolive.5-20-g2052d29 -- generated on 08.02.2013 12:48:36.
[INFO    ] Copyright 2003, 2004, 2005, 2006, 2007, 2008, 2009 Peter Baumann, rasdaman GmbH.
[INFO    ] Rasdaman community is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
[INFO    ] Rasdaman community is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
[INFO    ] 
[INFO    ] rasmgr log file is: /tmp/rasdaman_inst/log//rasmgr.011532.log
[INFO    ] start_rasdaman.sh: starting all rasdaman servers...
[INFO    ] rasadmin:localhost> up srv -all
[INFO    ]     Started 10 servers on 1 hosts
[INFO    ] start_rasdaman.sh: done.
[DEBUG   ] Sending keepalive
[DEBUG   ] Sending POST request to 'http://kahlua.eecs.jacobs-university.de/trac/rasdaman/builds/933/keepalive/'
[DEBUG   ] Sending keepalive
[DEBUG   ] Sending POST request to 'http://kahlua.eecs.jacobs-university.de/trac/rasdaman/builds/933/keepalive/'
[DEBUG   ] Sending keepalive
[DEBUG   ] Sending POST request to 'http://kahlua.eecs.jacobs-university.de/trac/rasdaman/builds/933/keepalive/'
[DEBUG   ] Sending keepalive
[DEBUG   ] Sending POST request to 'http://kahlua.eecs.jacobs-university.de/trac/rasdaman/builds/933/keepalive/'
[DEBUG   ] Sending keepalive
[DEBUG   ] Sending POST request to 'http://kahlua.eecs.jacobs-university.de/trac/rasdaman/builds/933/keepalive/'
[DEBUG   ] Sending keepalive
....

bitten slave and master are from trunk, revision 1011, slave is on Debian 6.0, 64 bit, python 2.6.6