IGNITE-27384 Throw when CacheConfiguration#extraStoragePaths contains duplicates (#12588)

Author: nizhikov

modules/core/src/main/java/org/apache/ignite/internal/processors/cache/ValidationOnNodeJoinUtils.java

@@ -21,6 +21,7 @@
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.Collections;
+import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
 import java.util.Objects;
@@ -397,6 +398,11 @@ else if (cc.getRebalanceMode() == SYNC) {
             if (!F.isEmpty(cc.getStoragePaths())) {
                 List<String> csp = Arrays.asList(cc.getStoragePaths());
 
+                if (csp.size() != new HashSet<>(csp).size()) {
+                    throw new IgniteCheckedException("CacheConfiguration contains duplicates " +
+                        "[storagePaths=" + Arrays.toString(cc.getStoragePaths()) + ']');
+                }
+
                 Set<String> nodeStorages = nodeStorages(c.getDataStorageConfiguration());
 
                 if (!nodeStorages.containsAll(csp)) {

modules/core/src/test/java/org/apache/ignite/internal/processors/cache/persistence/filename/CustomCacheStorageConfigurationSelfTest.java

@@ -22,6 +22,7 @@
 import java.util.Set;
 import java.util.function.Consumer;
 import java.util.stream.IntStream;
+import javax.cache.CacheException;
 import org.apache.ignite.IgniteCache;
 import org.apache.ignite.IgniteCheckedException;
 import org.apache.ignite.Ignition;
@@ -226,6 +227,19 @@ public void testDifferentStoragePathForGroupThrows() throws Exception {
                     .setIndexPath(myPath.getAbsolutePath())),
                 IgniteCheckedException.class
             );
+
+            assertThrowsWithCause(
+                () -> srv.createCache(new CacheConfiguration<>("my-cache4")
+                    .setStoragePaths(myPath2.getAbsolutePath(), myPath3.getAbsolutePath(), myPath2.getAbsolutePath())),
+                CacheException.class
+            );
+
+            assertThrowsWithCause(
+                () -> srv.createCache(new CacheConfiguration<>("my-cache4")
+                    .setGroupName("grp-4")
+                    .setStoragePaths(myPath2.getAbsolutePath(), myPath3.getAbsolutePath(), myPath2.getAbsolutePath())),
+                IgniteCheckedException.class
+            );
         };
 
         try (IgniteEx srv = startGrid(new IgniteConfiguration().setDataStorageConfiguration(new DataStorageConfiguration()