snmp mnesia

Dietmar Schaefer <>
Wed Feb 2 10:23:45 CET 2005


HI !


Did I find something strange ?


I am using Distributed Erlang , SNMP, Mnesia.

Yesterday I decided to enhance my MIB incorporate
an additional index:



 externalInterfacesEntry OBJECT-TYPE
    SYNTAX ExternalInterfacesEntry
 
    ACCESS not-accessible
    STATUS mandatory
    DESCRIPTION
    "A list of the external 4D-Planner interfaces "
    INDEX { hIndex,externalInterfaceIndex }
    ::= { externalInterfacesList 1 }  
    ExternalInterfacesEntry ::=               SEQUENCE {
        hIndex                                              
DisplayString (SIZE(0..10)),             <----this entry is new       
       externalInterfaceIndex                     INTEGER (1.. 30),
        externalInterfaceIdent                     DisplayString 
(SIZE(0..10)),
        externalInterfaceStatus                    INTEGER,
        externalInterfaceCommand              INTEGER,
        externalInterfaceCommandResult    INTEGER,
        externalInterfaceRowStatus             RowStatus
    }


hIndex OBJECT-TYPE
    SYNTAX DisplayString (SIZE(0..10))
 
    ACCESS read-only
    STATUS mandatory
    DESCRIPTION
    "A index that uniquely identifies an entry in the
     processesList table. "
    ::= { externalInterfacesEntry 1 }

externalInterfaceIndex OBJECT-TYPE
    SYNTAX INTEGER (1.. 30)
 
    ACCESS read-only
    STATUS mandatory
    DESCRIPTION
    "A index that uniquely identifies an entry in the externalInterfaces 
table."
    ::= { externalInterfacesEntry 2 }



I changed the database initialization,header files, deleted and created 
new tables but
asking my agent I got:

* SNMP A-NET-IF INFO: time in agent: 25801 mysec
** SNMP MASTER-AGENT LOG:
   apply: snmp_generic,table_func,[get_next,
                                   [],
                                   [0],
                                   {externalInterfacesList,mnesia}]

** SNMP MASTER-AGENT LOG:
   returned: [{[1,4,119,107,115,50,1],"wks2"}]

=ERROR REPORT==== 2-Feb-2005::09:51:09 ===
** User error: Got "wks2" from 
{snmp_generic,table_func,[{externalInterfacesList,mnesia}]}. Using wrongType

despite the fact that this is right !


I was looking for what might have caused this "misbehavior" and couldn't 
find anything ---- until
I deleted the mnesa schema and created  a new one.

Now it works !

As far as I understand deleteing the schema  should not be necessary ??

Any advice ?


Regards


Dietmar









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