Hi,
I have a question 

My replication database always pending and i check log for the result : 
Error-: Database 'msdb' cannot be opened due to inaccessible files or insufficient memory or disk space.  See the SQL Server errorlog for details.An exception occurred while executing a Transact-SQL statement or batch..
17156 3a68  10/10 09:07:23 76571 CSQLRestoreBase::getAFilesToRestoreForLiveSync(8704): -Error-: Failed to get last restore point for server vCOMMVAULT-CS-3\COMMVAULT] with error r0xEDA00077:{CSQLRestoreBase::GetLastRestorePointForLiveSync(8688)/CV.0x77-Failed to get last restored state of database aWFEngine] for live sync.}].
17156 3a68  10/10 09:07:23 76571 CSQLRestoreBase::GetAfilesForAllDatabases(10292): -Info--: Failed to get AFile information or no AFile information found on the CS for database bWFEngine].
17156 3a68  10/10 09:07:23 76571 CsqlDMO::getDBLastRestoreInfo(6167): -Error-: Database 'msdb' cannot be opened due to inaccessible files or insufficient memory or disk space.  See the SQL Server errorlog for details.An exception occurred while executing a Transact-SQL statement or batch..
17156 3a68  10/10 09:07:23 76571 CSQLRestoreBase::getAFilesToRestoreForLiveSync(8704): -Error-: Failed to get last restore point for server COMMVAULT-CS-3\COMMVAULT] with error h0xEDA00077:{CSQLRestoreBase::GetLastRestorePointForLiveSync(8688)/CV.0x77-Failed to get last restored state of database aUsageHistoryDB] for live sync.}].
17156 3a68  10/10 09:07:23 76571 CSQLRestoreBase::GetAfilesForAllDatabases(10292): -Info--: Failed to get AFile information or no AFile information found on the CS for database dUsageHistoryDB].
17156 3a68  10/10 09:07:23 76571 CsqlDMO::getDBLastRestoreInfo(6167): -Error-: Database 'msdb' cannot be opened due to inaccessible files or insufficient memory or disk space.  See the SQL Server errorlog for details.An exception occurred while executing a Transact-SQL statement or batch..
17156 3a68  10/10 09:07:23 76571 CSQLRestoreBase::getAFilesToRestoreForLiveSync(8704): -Error-: Failed to get last restore point for server COMMVAULT-CS-3\COMMVAULT] with error 0xEDA00077:{CSQLRestoreBase::GetLastRestorePointForLiveSync(8688)/CV.0x77-Failed to get last restored state of database oDM2] for live sync.}].
17156 3a68  10/10 09:07:23 76571 CSQLRestoreBase::GetAfilesForAllDatabases(10292): -Info--: Failed to get AFile information or no AFile information found on the CS for database fDM2].
17156 3a68  10/10 09:07:23 76571 CsqlDMO::getDBLastRestoreInfo(6167): -Error-: Database 'msdb' cannot be opened due to inaccessible files or insufficient memory or disk space.  See the SQL Server errorlog for details.An exception occurred while executing a Transact-SQL statement or batch..
17156 3a68  10/10 09:07:23 76571 CSQLRestoreBase::getAFilesToRestoreForLiveSync(8704): -Error-: Failed to get last restore point for server oCOMMVAULT-CS-3\COMMVAULT] with error U0xEDA00077:{CSQLRestoreBase::GetLastRestorePointForLiveSync(8688)/CV.0x77-Failed to get last restored state of database aCVCloud] for live sync.}].
17156 3a68  10/10 09:07:23 76571 CSQLRestoreBase::GetAfilesForAllDatabases(10292): -Info--: Failed to get AFile information or no AFile information found on the CS for database CVCloud].
17156 3a68  10/10 09:07:23 76571 CsqlDMO::getDBLastRestoreInfo(6167): -Error-: Database 'msdb' cannot be opened due to inaccessible files or insufficient memory or disk space.  See the SQL Server errorlog for details.An exception occurred while executing a Transact-SQL statement or batch..
17156 3a68  10/10 09:07:23 76571 CSQLRestoreBase::getAFilesToRestoreForLiveSync(8704): -Error-: Failed to get last restore point for server rCOMMVAULT-CS-3\COMMVAULT] with error M0xEDA00077:{CSQLRestoreBase::GetLastRestorePointForLiveSync(8688)/CV.0x77-Failed to get last restored state of database dCommServ] for live sync.}].
17156 3a68  10/10 09:07:23 76571 CSQLRestoreBase::GetAfilesForAllDatabases(10292): -Info--: Failed to get AFile information or no AFile information found on the CS for database CommServ].
17156 3a68  10/10 09:07:23 76571 CsqlDMO::getDBLastRestoreInfo(6167): -Error-: Database 'msdb' cannot be opened due to inaccessible files or insufficient memory or disk space.  See the SQL Server errorlog for details.An exception occurred while executing a Transact-SQL statement or batch..
17156 3a68  10/10 09:07:23 76571 CSQLRestoreBase::getAFilesToRestoreForLiveSync(8704): -Error-: Failed to get last restore point for server eCOMMVAULT-CS-3\COMMVAULT] with error 30xEDA00077:{CSQLRestoreBase::GetLastRestorePointForLiveSync(8688)/CV.0x77-Failed to get last restored state of database tAppStudioDB] for live sync.}].
17156 3a68  10/10 09:07:23 76571 CSQLRestoreBase::GetAfilesForAllDatabases(10292): -Info--: Failed to get AFile information or no AFile information found on the CS for database dAppStudioDB].

I checked the memory and disk, there was still plenty
 

Any Ideas?