java.io.IOException: remote file operation failed:... at
hudson.remoting.Channel@35f2fb2:linengbld50: java.io.IOException:
Remote call on linengbld50 failed
...
Caused by: java.io.IOException: Remote call on linengbld50 failed
...
Caused by: java.lang.NoClassDefFoundError: Could not initialize class
 org.apache.tools.ant.Location
...