framework/cluster: fix NPE for ms-host status when mgr stops (#10500)

* framework/cluster: fix NPE for ms-host status when mgr stops

This handles an NPE case for when management server host status is not
found in the DB, when stopping the cluster manager.

Signed-off-by: Rohit Yadav <[email protected]>

* Update framework/cluster/src/main/java/com/cloud/cluster/ClusterManagerImpl.java

Co-authored-by: dahn <[email protected]>

* Update framework/cluster/src/main/java/com/cloud/cluster/ClusterManagerImpl.java

---------

Signed-off-by: Rohit Yadav <[email protected]>
Co-authored-by: dahn <[email protected]>

Author: rohityadavcloud

Diff for: framework/cluster/src/main/java/com/cloud/cluster/ClusterManagerImpl.java

@@ -1107,9 +1107,19 @@ public boolean stop() {
         if (_mshostId != null) {
             final ManagementServerHostVO mshost = _mshostDao.findByMsid(_msId);
             if (mshost != null) {
-                final ManagementServerStatusVO mshostStatus = mshostStatusDao.findByMsId(mshost.getUuid());
-                mshostStatus.setLastJvmStop(new Date());
-                mshostStatusDao.update(mshostStatus.getId(), mshostStatus);
+                ManagementServerStatusVO mshostStatus = mshostStatusDao.findByMsId(mshost.getUuid());
+                if (mshostStatus != null) {
+                    mshostStatus.setLastJvmStop(new Date());
+                    mshostStatusDao.update(mshostStatus.getId(), mshostStatus);
+                } else {
+                    logger.warn("Found a management server host [{}] without a status. This should never happen!", mshost);
+                    mshostStatus = new ManagementServerStatusVO();
+                    mshostStatus.setMsId(mshost.getUuid());
+                    mshostStatus.setLastSystemBoot(new Date());
+                    mshostStatus.setLastJvmStart(new Date());
+                    mshostStatus.setUpdated(new Date());
+                    mshostStatusDao.persist(mshostStatus);
+                }
 
                 ManagementServerHost.State msHostState = ManagementServerHost.State.Down;
                 if (ManagementServerHost.State.Maintenance.equals(mshost.getState()) || ManagementServerHost.State.PreparingForMaintenance.equals(mshost.getState())) {