The chapter Using a Simple Lock File System in the ESB Configuration guide shows the following sample configuration

karaf.lock=true
karaf.lock.class=org.apache.karaf.main.SimpleFileLock
karaf.lock.dir=PathToLockFileDirectory
karaf.lock.delay=10

The last variable has an inappropriate value of 10. The unit is actually milliseconds and not seconds so it should rather be set to 10000.
We should update the docs and perhaps qualify the unit of this variable.