> [aroberts@sdfcdmsdaq midas]$ odbedit
> [ODBEdit,ERROR] [odb.cxx:2043:db_open_database,ERROR] Removed ODB client 'ODBEdit', index 0 because process pid 
> 1615051 does not exists
> [ODBEdit,INFO] Removed open record flag from "/Experiment/Security/RPC hosts/Allowed hosts"
> [ODBEdit,INFO] Removed exclusive access mode from "/Experiment/Security/RPC hosts/Allowed hosts"
> [ODBEdit,INFO] Corrected 1 ODB entries
> [ODBEdit,INFO] Deleted entry '/System/Clients/1615051' for client 'ODBEdit' because it is not connected to ODB
> [ODBEdit,INFO] Client 'ODBEdit' on buffer 'SYSMSG' removed by bm_open_buffer because process pid 1615051 does not 
> exist

so far, so good, we connected to ODB (lock was not stuck), cleared out client "odbedit" with pid 1615051 that crashed 
without properly disconnecting. ODB semaphore is working correctly.

> [ODBEdit,ERROR] [odb.cxx:2489:db_lock_database,ERROR] cannot lock ODB semaphore, timeout 10000 ms, aborting...
> Aborted (core dumped)

suddenly, an ODB semaphore timeout...

can you post the stack trace from this core dump? I am pretty sure it will be boring, but just in case...

K.O.