> Source: [sk150652](https://support.checkpoint.com/results/sk/sk150652)

# sk150652 - Domains are unable to synchronize in HA environment, after restoring a snapshot on a single Multi-Domain Management server

| Property | Value |
|----------|-------|
| Solution ID | sk150652 |
| Date Created | 2019-04-02 |
| Last Modified | 2020-01-06 |
| Technical Level | Advanced |
| Products | Multi-Domain Security Management Server |
| Versions | R82.10, R81.20, R82, R82.20 |
| OS | Gaia |

## Symptoms

- * Domain synchronization fails with: `"NGM failed to import data"`.

* In the log file: XXX there are missing work sessions on one of the machines:  
  `
  infrastructure.logging.DefaultExceptionLoggerHandlerImpl [qtp403314650-6793]: incident [3a6709d4-e187-4850-a7cb-6c245eddadf4]: 
  com.checkpoint.infrastructure.utils.runtime.CpAssertionError: The following assignments workSessions are missing: [26b95079-1595-42dc-9bf1-362192f9fea6, 46daa860-b2be-4dae-86d2-843153179301]. Make sure that the following domains are synced: [a0bbbc99-adef-4ef8-bb6d-cebcebcebceb, 8bf4ac51-2df7-40e1-9bce-bedbedbedbed]`

* Checking the database, work sessions are missing on one of the machines:  

  ```
  
  [Expert@MDM02:0]# psql_client cpm postgres -c "select objid, applicationname,username,numberoflocks,state from worksession where 
  objid='26b95079-1595-42dc-9bf1-362192f9fea6'"
                  objid                 |  applicationname   | username | numberoflocks |   state
  --------------------------------------+--------------------+----------+---------------+-----------
  26b95079-1595-42dc-9bf1-362192f9fea6 | cpmidu_update_tool | fwm_user |             0 | PUBLISHED
  (1 row)
   
  [Expert@MDM02:0]# psql_client cpm postgres -c "select objid, applicationname,username,numberoflocks,state from worksession where 
  objid='46daa860-b2be-4dae-86d2-843153179301'"
                  objid                 | applicationname | username | numberoflocks |   state
  --------------------------------------+-----------------+----------+---------------+-----------
  46daa860-b2be-4dae-86d2-843153179301 | fwm             | fwm_user |             0 | PUBLISHED
  (1 row)
   
  Work sessions on the Primary MDM01
  [Expert@MDM01:0]# psql_client cpm postgres -c "select objid, applicationname,username,numberoflocks,state from worksession where 
  objid='26b95079-1595-42dc-9bf1-362192f9fea6'"
  objid | applicationname | username | numberoflocks | state
  -------+-----------------+----------+---------------+-------
  (0 rows)
   
  [Expert@MDM01:0]# psql_client cpm postgres -c "select objid, applicationname,username,numberoflocks,state from worksession where 
  objid='46daa860-b2be-4dae-86d2-843153179301'"
  objid | applicationname | username | numberoflocks | state
  -------+-----------------+----------+---------------+-------
  (0 rows)
  ```

  <br />

## Cause

Snapshot has been restored on only one of the machines, or MDS backup was restored on only one machine.

## Solution

This solution requires authentication. Please log in to view the full solution.

---

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