/// Fired when recovery is ended
/// @param subsItem Description of the instrument
/// @param reason Reason of recovery
virtual void InstrumentListener::onRecoveryStopped( SpectraSubscriptionItem const& subsItem, RecoveryReason reason );

It means that the recovery process has been done and Market Data is in a consistent state.

How MOEX Spectra Market Data Adapter reacts on Sequence Reset message

The new type of messages (a message 'Sequence Reset') was introduced in Spectra FAST protocol specification v 1.4.2. 

MOEX Spectra Market Data Adapter handles Sequence Reset message in the following way:

1. A Sequence Reset message received in Incremental feed initiates recovery mechanism for all subscribed instruments. 
   In this case, callbacks Spectra::InstrumentListener::onRecoveryStarted() and Spectra::InstrumentListener::onBookReset() are fired.

2. Sequence filtering mechanism isn't applied to Sequence Reset messages. 
   Therefore, OnRecoveryStarted and OnBookReset callbacks would be fired for each sequence reset message (i.e. twice due to A-B arbitrage).