kumaab commented on code in PR #545:
URL: https://github.com/apache/ranger/pull/545#discussion_r2006145093


##########
security-admin/src/main/java/org/apache/ranger/biz/ServiceDBStore.java:
##########
@@ -6760,14 +6769,25 @@ private void getOrCreateLabel() {
             }
 
             if (xxPolicyLabel != null) {
-                XXPolicyLabelMap xxPolicyLabelMap = new XXPolicyLabelMap();
+                // doing a find to check if the label is already associated 
with the policy (may happen in concurrent sessions)
+                List<XXPolicyLabelMap> xxPolicyLabelMapList = 
daoMgr.getXXPolicyLabelMap().findByPolicyIdAndLabelId(xPolicy.getId(), 
xxPolicyLabel.getId());
+                if (xxPolicyLabelMapList != null && 
!xxPolicyLabelMapList.isEmpty()) {
+                    LOG.info("Policy with id {} already linked to label with 
id = {}", xPolicy.getId(), xxPolicyLabel.getId());
+                } else {
+                    XXPolicyLabelMap xxPolicyLabelMap = new XXPolicyLabelMap();
 
-                xxPolicyLabelMap.setPolicyId(xPolicy.getId());
-                xxPolicyLabelMap.setPolicyLabelId(xxPolicyLabel.getId());
+                    xxPolicyLabelMap.setPolicyId(xPolicy.getId());
+                    xxPolicyLabelMap.setPolicyLabelId(xxPolicyLabel.getId());
 
-                xxPolicyLabelMap = 
rangerAuditFields.populateAuditFieldsForCreate(xxPolicyLabelMap);
+                    xxPolicyLabelMap = 
rangerAuditFields.populateAuditFieldsForCreate(xxPolicyLabelMap);
 
-                daoMgr.getXXPolicyLabelMap().create(xxPolicyLabelMap);
+                    if (doesPolicyExist(xPolicy)) {

Review Comment:
   makes sense.



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