[NO ISSUE][*DB] Prevent metadata node from receiving metadata replicas

Change-Id: I879195e84328d86fad439ea825201ad052a30699
Reviewed-on: https://asterix-gerrit.ics.uci.edu/c/asterixdb/+/18296
Reviewed-by: Michael Blow <mblow@apache.org>
Reviewed-by: Murtadha Hubail <mhubail@apache.org>
Tested-by: Michael Blow <mblow@apache.org>
diff --git a/asterixdb/asterix-app/src/main/java/org/apache/asterix/app/nc/NCAppRuntimeContext.java b/asterixdb/asterix-app/src/main/java/org/apache/asterix/app/nc/NCAppRuntimeContext.java
index 4d32967..61656b7 100644
--- a/asterixdb/asterix-app/src/main/java/org/apache/asterix/app/nc/NCAppRuntimeContext.java
+++ b/asterixdb/asterix-app/src/main/java/org/apache/asterix/app/nc/NCAppRuntimeContext.java
@@ -22,6 +22,7 @@
 import java.rmi.RemoteException;
 import java.rmi.server.UnicastRemoteObject;
 import java.util.Collection;
+import java.util.OptionalInt;
 import java.util.Set;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.ConcurrentMap;
@@ -160,6 +161,7 @@
     private ICacheManager cacheManager;
     private IConfigValidator configValidator;
     private IDiskWriteRateLimiterProvider diskWriteRateLimiterProvider;
+    private Integer metadataPartitionId;
 
     public NCAppRuntimeContext(INCServiceContext ncServiceContext, NCExtensionManager extensionManager,
             IPropertiesFactory propertiesFactory) {
@@ -443,6 +445,7 @@
     @Override
     public void initializeMetadata(boolean newUniverse, int partitionId) throws Exception {
         LOGGER.info("Bootstrapping metadata");
+        metadataPartitionId = partitionId;
         MetadataNode.INSTANCE.initialize(this, ncExtensionManager.getMetadataTupleTranslatorProvider(),
                 ncExtensionManager.getMetadataExtensions(), partitionId);
 
@@ -636,4 +639,9 @@
     public IDiskWriteRateLimiterProvider getDiskWriteRateLimiterProvider() {
         return diskWriteRateLimiterProvider;
     }
+
+    @Override
+    public OptionalInt getMetadataPartitionId() {
+        return metadataPartitionId == null ? OptionalInt.empty() : OptionalInt.of(metadataPartitionId);
+    }
 }
diff --git a/asterixdb/asterix-common/src/main/java/org/apache/asterix/common/api/INcApplicationContext.java b/asterixdb/asterix-common/src/main/java/org/apache/asterix/common/api/INcApplicationContext.java
index 5475b97..a5ae099 100644
--- a/asterixdb/asterix-common/src/main/java/org/apache/asterix/common/api/INcApplicationContext.java
+++ b/asterixdb/asterix-common/src/main/java/org/apache/asterix/common/api/INcApplicationContext.java
@@ -20,6 +20,7 @@
 
 import java.io.IOException;
 import java.rmi.RemoteException;
+import java.util.OptionalInt;
 import java.util.concurrent.Executor;
 
 import org.apache.asterix.common.context.IStorageComponentProvider;
@@ -147,4 +148,6 @@
      * @return the disk write rate limiter provider
      */
     IDiskWriteRateLimiterProvider getDiskWriteRateLimiterProvider();
+
+    OptionalInt getMetadataPartitionId();
 }
diff --git a/asterixdb/asterix-replication/src/main/java/org/apache/asterix/replication/messaging/PartitionResourcesListTask.java b/asterixdb/asterix-replication/src/main/java/org/apache/asterix/replication/messaging/PartitionResourcesListTask.java
index 0f5949e..97d03e6 100644
--- a/asterixdb/asterix-replication/src/main/java/org/apache/asterix/replication/messaging/PartitionResourcesListTask.java
+++ b/asterixdb/asterix-replication/src/main/java/org/apache/asterix/replication/messaging/PartitionResourcesListTask.java
@@ -51,6 +51,11 @@
     @Override
     public void perform(INcApplicationContext appCtx, IReplicationWorker worker) throws HyracksDataException {
         LOGGER.debug("processing {}", this);
+        if (appCtx.getMetadataPartitionId().isPresent() && appCtx.getMetadataPartitionId().getAsInt() == partition
+                && appCtx.getReplicaManager().getPartitions().contains(partition)) {
+            LOGGER.warn("received request to get metadata files from non-master {}", worker.getRemoteAddress());
+            throw new IllegalStateException();
+        }
         final PersistentLocalResourceRepository localResourceRepository =
                 (PersistentLocalResourceRepository) appCtx.getLocalResourceRepository();
         localResourceRepository.cleanup(partition);