Blocking issue+SQL Server 2012

(@_msparam_0 nvarchar(4000))SELECT
ISNULL((case dmi.mirroring_redo_queue_type when N'UNLIMITED' then 0 else dmi.mirroring_redo_queue end),0) AS [MirroringRedoQueueMaxSize],
ISNULL(dmi.mirroring_connection_timeout,0) AS [MirroringTimeout],
ISNULL(dmi.mirroring_partner_name,'') AS [MirroringPartner],
ISNULL(dmi.mirroring_partner_instance,'') AS [MirroringPartnerInstance],
ISNULL(dmi.mirroring_role,0) AS [MirroringRole],
ISNULL(dmi.mirroring_safety_level + 1, 0) AS [MirroringSafetyLevel],
ISNULL(dmi.mirroring_state + 1, 0) AS [MirroringStatus],
ISNULL(dmi.mirroring_witness_name,'') AS [MirroringWitness],
ISNULL(dmi.mirroring_witness_state + 1, 0) AS [MirroringWitnessStatus],
CAST(case when dmi.mirroring_partner_name is null then 0 else 1 end AS bit) AS [IsMirroringEnabled],
ISNULL(dmi.mirroring_guid,'00000000-0000-0000-0000-0000000000000000') AS [MirroringID],
ISNULL(dmi.mirroring_role_sequence,0) AS [MirroringRoleSequence],
ISNULL(dmi.mirroring_safety_sequence,0) AS [MirroringSafetySequence],
ISNULL(dmi.mirroring_failover_lsn,0) AS [MirroringFailoverLogSequenceNumber],
dtb.is_ansi_null_default_on AS [AnsiNullDefault],
dtb.is_ansi_nulls_on AS [AnsiNullsEnabled],
dtb.is_ansi_padding_on AS [AnsiPaddingEnabled],
dtb.is_ansi_warnings_on AS [AnsiWarningsEnabled],
dtb.is_arithabort_on AS [ArithmeticAbortEnabled],
dtb.is_auto_shrink_on AS [AutoShrink],
dtb.is_cursor_close_on_commit_on AS [CloseCursorsOnCommitEnabled],
dtb.is_concat_null_yields_null_on AS [ConcatenateNullYieldsNull],
dtb.is_numeric_roundabort_on AS [NumericRoundAbortEnabled],
dtb.is_quoted_identifier_on AS [QuotedIdentifiersEnabled],
dtb.is_read_only AS [ReadOnly],
dtb.is_recursive_triggers_on AS [RecursiveTriggersEnabled],
dtb.is_local_cursor_default AS [LocalCursorsDefault],
dtb.page_verify_option AS [PageVerify],
dtb.recovery_model AS [RecoveryModel],
dtb.user_access AS [UserAccess],
dtb.is_db_chaining_on AS [DatabaseOwnershipChaining],
dtb.is_auto_update_stats_async_on AS [AutoUpdateStatisticsAsync],
dtb.is_date_correlation_on AS [DateCorrelationOptimization],
dtb.is_trustworthy_on AS [Trustworthy],
dtb.name AS [Name],
dtb.database_id AS [ID],
dtb.create_date AS [CreateDate],
dtb.is_auto_create_stats_on AS [AutoCreateStatisticsEnabled],
dtb.is_auto_update_stats_on AS [AutoUpdateStatisticsEnabled],
dtb.is_parameterization_forced AS [IsParameterizationForced],
dtb.is_read_committed_snapshot_on AS [IsReadCommittedSnapshotOn],
dtb.is_auto_close_on AS [AutoClose],
dtb.is_broker_enabled AS [BrokerEnabled],
CAST(isnull(dtb.source_database_id, 0) AS bit) AS [IsDatabaseSnapshot],
ISNULL(DB_NAME(dtb.source_database_id), N'') AS [DatabaseSnapshotBaseName],
dtb.is_fulltext_enabled AS [IsFullTextEnabled],
dtb.service_broker_guid AS [ServiceBrokerGuid],
dtb.snapshot_isolation_state AS [SnapshotIsolationState],
(dtb.is_published*1+dtb.is_subscribed*2+dtb.is_merge_published*4) AS [ReplicationOptions],
suser_sname(dtb.owner_sid) AS [Owner],
ISNULL(dtb.log_reuse_wait,0) AS [LogReuseWaitStatus],
drs.recovery_fork_guid AS [RecoveryForkGuid],
drs.database_guid AS [DatabaseGuid],
CAST((case when drs.last_log_backup_lsn is not null then 1 else 0 end) AS bit) AS [HasFullBackup],
CAST(case when dtb.name in ('master','model','msdb','tempdb') then 1 else dtb.is_distributor end AS bit) AS [IsSystemObject],
CAST(case when ctb.database_id is null then 0 else 1  end AS bit) AS [ChangeTrackingEnabled],
CAST(ISNULL(ctb.is_auto_cleanup_on,0) AS bit) AS [ChangeTrackingAutoCleanUp],
ISNULL(ctb.retention_period,0) AS [ChangeTrackingRetentionPeriod],
CAST(ISNULL(ctb.retention_period_units,0) AS tinyint) AS [ChangeTrackingRetentionPeriodUnits],
dtb.containment AS [ContainmentType],
dtb.default_language_lcid AS [DefaultLanguageLcid],
dtb.default_language_name AS [DefaultLanguageName],
dtb.default_fulltext_language_lcid AS [DefaultFullTextLanguageLcid],
ISNULL(dtb.default_fulltext_language_name,N'') AS [DefaultFullTextLanguageName],
CAST(dtb.is_nested_triggers_on AS bit) AS [NestedTriggersEnabled],
CAST(dtb

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