[To rel/0.13][IOTDB-4004] Fix mvn release:prepare failed cause by singleton HashVirtualPartitioner (#6845)

Author: Cpaulyz

server/src/main/java/org/apache/iotdb/db/engine/storagegroup/virtualSg/HashVirtualPartitioner.java

@@ -20,11 +20,12 @@
 
 import org.apache.iotdb.db.conf.IoTDBDescriptor;
 import org.apache.iotdb.db.metadata.path.PartialPath;
+import org.apache.iotdb.db.utils.TestOnly;
 
 public class HashVirtualPartitioner implements VirtualPartitioner {
 
   /** total number of virtual storage groups */
-  public static int STORAGE_GROUP_NUM =
+  private static int STORAGE_GROUP_NUM =
       IoTDBDescriptor.getInstance().getConfig().getVirtualStorageGroupNum();
 
   private HashVirtualPartitioner() {}
@@ -47,6 +48,11 @@ private int toStorageGroupId(PartialPath deviceId) {
     return Math.abs(deviceId.hashCode() % STORAGE_GROUP_NUM);
   }
 
+  @TestOnly
+  public void reset() {
+    STORAGE_GROUP_NUM = IoTDBDescriptor.getInstance().getConfig().getVirtualStorageGroupNum();
+  }
+
   private static class HashVirtualPartitionerHolder {
 
     private static final HashVirtualPartitioner INSTANCE = new HashVirtualPartitioner();

server/src/test/java/org/apache/iotdb/db/utils/EnvironmentUtils.java

@@ -31,6 +31,7 @@
 import org.apache.iotdb.db.engine.cache.TimeSeriesMetadataCache;
 import org.apache.iotdb.db.engine.compaction.CompactionTaskManager;
 import org.apache.iotdb.db.engine.cq.ContinuousQueryService;
+import org.apache.iotdb.db.engine.storagegroup.virtualSg.HashVirtualPartitioner;
 import org.apache.iotdb.db.engine.trigger.service.TriggerRegistrationService;
 import org.apache.iotdb.db.exception.ContinuousQueryException;
 import org.apache.iotdb.db.exception.StorageEngineException;
@@ -283,6 +284,9 @@ public static void envSetUp() {
     // reset id method
     DeviceIDFactory.getInstance().reset();
 
+    // reset HashVirtualPartitioner
+    HashVirtualPartitioner.getInstance().reset();
+
     TEST_QUERY_JOB_ID = QueryResourceManager.getInstance().assignQueryId(true);
     TEST_QUERY_CONTEXT = new QueryContext(TEST_QUERY_JOB_ID);
   }