RFA InvalidUsageException while decoding RDMFieldDictionary – version mismatch after ClearCache

mktdata

Hi Support Team,

I’m using RFA (OMM Consumer) and decoding the field dictionary using:

m_RDMFieldDictionary.decodeRDMFldDictionary(series);

I intermittently hit the following exception:

InvalidUsageException
Classification: IncorrectAPIUsage
StatusText: RDMFieldDictionary::decodeRDMFldDictionary -
Series has Version mismatch '4.20.68' vs. previously found '4.20.66'

I am making the 2 request to two different kind of dictionaries RFA_String rdmFld("RWFFld", 6, false); and RFA_String rdmEnum("RWFEnum", 7, false); at a one time like this

m_reqMsg.clear();

	m_attribInfo.clear();

	m_reqMsg.setMsgModelType( rfa::rdm::MMT_DICTIONARY );

	m_reqMsg.setInteractionType( ReqMsg::InitialImageFlag | ReqMsg::InterestAfterRefreshFlag );

	m_attribInfo.setDataMask( rfa::rdm::DICTIONARY_NORMAL );

	m_attribInfo.setServiceName( RFA_String( serviceName.c_str(), serviceName.length(), false) );

	m_attribInfo.setName( m_rdmFld );

	m_reqMsg.setAttribInfo( m_attribInfo );

	m_ommItemIntSpec.setMsg( &m_reqMsg );

	m_rdmFldDictHandle = m_oMMConsumer->registerClient(m_eventQueue,

												&m_ommItemIntSpec,

												*this,

												NULL

												);

	m_attribInfo.setName( m_rdmEnum );

	m_reqMsg.setAttribInfo( m_attribInfo );

	m_ommItemIntSpec.setMsg( &m_reqMsg );

	m_rdmEnumDictHandle = m_oMMConsumer->registerClient(m_eventQueue,

												&m_ommItemIntSpec,

												*this,

												NULL

);

Questions :-
1) What needs to be done in case of we get indication mask as RespMsg::DoNotCacheFlag on first refresh message ? Is it possible any how?
2) What needs to be done in case of we get indication mask as RespMsg::ClearCacheFlag on first refresh message ?
3) Why version mismatch error was occurring?

I have also attached the ss of log

Jirapongse

@mktdata

Thank you for reaching out to us.

According to the error message, the application may be reusing the m_RDMFieldDictionary for decoding. The message indicates that m_RDMFieldDictionary already contains dictionary version 4.20.66, while the application attempts to decode version 4.20.68.

1. DoNotCacheFlag indicates that the message should not be cached.
2. ClearCacheFlag indicates that the cache should be cleared. The cached data for this stream must be deleted.
3. You should check whether m_RDMFieldDictionary was reused for decoding.