timoninmaxim commented on a change in pull request #9313:
URL: https://github.com/apache/ignite/pull/9313#discussion_r702816881



##########
File path: 
modules/core/src/main/java/org/apache/ignite/internal/processors/cache/GridCacheProcessor.java
##########
@@ -3778,43 +3780,50 @@ private void checkReadOnlyState(
 
         GridPlainClosure2<Collection<byte[]>, byte[], 
IgniteInternalFuture<Boolean>> startCacheClsr =
             (grpKeys, masterKeyDigest) -> {
-            List<DynamicCacheChangeRequest> srvReqs = null;
-            Map<String, DynamicCacheChangeRequest> clientReqs = null;
-
-            Iterator<byte[]> grpKeysIter = grpKeys.iterator();
-
-            for (StoredCacheData ccfg : storedCacheDataList) {
-                assert !ccfg.config().isEncryptionEnabled() || 
grpKeysIter.hasNext();
-
-                DynamicCacheChangeRequest req = prepareCacheChangeRequest(
-                    ccfg.config(),
-                    ccfg.config().getName(),
-                    null,
-                    resolveCacheType(ccfg.config()),
-                    ccfg.sql(),
-                    failIfExists,
-                    true,
-                    restartId,
-                    disabledAfterStart,
-                    ccfg.queryEntities(),
-                    ccfg.config().isEncryptionEnabled() ? grpKeysIter.next() : 
null,
-                    ccfg.config().isEncryptionEnabled() ? masterKeyDigest : 
null);
-
-                if (req != null) {
-                    if (req.clientStartOnly()) {
-                        if (clientReqs == null)
-                            clientReqs = 
U.newLinkedHashMap(storedCacheDataList.size());
-
-                        clientReqs.put(req.cacheName(), req);
-                    }
-                    else {
-                        if (srvReqs == null)
-                            srvReqs = new 
ArrayList<>(storedCacheDataList.size());
+                List<DynamicCacheChangeRequest> srvReqs = null;
+                Map<String, DynamicCacheChangeRequest> clientReqs = null;
+
+                Iterator<byte[]> grpKeysIter = grpKeys.iterator();
+
+                for (StoredCacheData ccfg : storedCacheDataList) {
+                    assert ccfg.grpKeyEncrypted() == null || 
ccfg.config().isEncryptionEnabled();
+
+                    // Reuse encription key if passed for this group. Take 
next generated otherwise.
+                    GroupKeyEncrypted encrKey = 
ccfg.config().isEncryptionEnabled() ? (ccfg.grpKeyEncrypted() != null ?
+                        ccfg.grpKeyEncrypted() : new GroupKeyEncrypted(0, 
grpKeysIter.next())) : null;
+
+                    DynamicCacheChangeRequest req = prepareCacheChangeRequest(
+                        ccfg.config(),
+                        ccfg.config().getName(),
+                        null,
+                        resolveCacheType(ccfg.config()),
+                        ccfg.sql(),
+                        failIfExists,
+                        true,
+                        restartId,
+                        disabledAfterStart,
+                        ccfg.queryEntities(),
+                        encrKey != null ? encrKey.key() : null,
+                        encrKey != null ? masterKeyDigest : null);
+
+                    if (encrKey != null)
+                        req.encryptionKeyId(encrKey.id());

Review comment:
       Let's move this setting inside the `prepareCacheChangeRequest` method. 
Now you have 2 places to fill `DynamicCacheChangeRequest` with info about 
encrypted key - key and id are set separately. 




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