Event Error as Server-side Exception: resource limit reached


I am subscribing a spectrum attribute of a DS(a/b/c). Sometimes I get an error as
org.omg.CORBA.TRANSIENT: Server-side Exception: resource limit reached vmcid: OMG minor code: 1 completed: No Severity: PANIC Reason: TangoApi_CANNOT_IMPORT_DEVICE Origin: Connection.dev_import(a/b/c)
Can anybody tell what this error exactly notifies and the probable reasons for this?

Good question.
I don't think I have ever encountered this error but the error message is suggesting the Tango DatabaseDS device server didn't have enough resources (RAM, opened file descriptors limit, …?) to execute your request properly when trying to import a Tango device.

Is the computer where your TANGO database server server is running under heavy load?
Do you have a huge number of clients doing a huge number of queries in parallel at high frequency? (A big number of client applications trying to connect to many TANGO devices which are currently not running?)

Are you creating DeviceProxies all the time at high frequency, without reusing the created DeviceProxy objects?

You can use the Database Monitoring tool (DBBench) to monitor the number and type of commands sent to the Database Server.
You can start this tool from Astor by right-clicking on the TANGO_HOST database and select "Database Monitoring".

In a similar way, you can also use the Database BlackBox right-click menu item to see the last 50 queries sent to the Database server. This could help to eventually identify a client which would send a huge/abnormal number of commands to the Database server.

Kind regards,
Rosenberg's Law: Software is easy to make, except when you want it to do something new.
Corollary: The only software that's worth making is software that does something new.
Register or login to create to post a reply.