i have migrated server side config for my db and I have found some strange behavior of slapadd:
I've got started migration from converting slapd.conf containing my db config and a 'tool-threads' parameter (with value above 1) into common ldif file, in which an 'olcToolThreads' was defined appropriately (i.e above 1). It was the simplest and clear step.
The next step was to 'slapadd -n 0' this ldif file into an empty server config (having slapd stopped), but just at adding 'cn=config' object (which contains olcToolThreads with value > 1) 'slapadd' stuck indefinitely at shed_yelds() call (I have observed this via strace tool from ubuntu).
So as a result slapadd had been in processing its operation indefinitely without any output but was capable to stop working by Ctrl-C handler.
Setting olcToolThreads to 0 or 1 has solved this problem.
I dont know is this a bug or my misconfiguration?