add isSolidityRequest check for MaintenanceUnavailableException

Author: Sunny Jiao

framework/src/main/java/org/tron/core/Wallet.java

@@ -174,6 +174,7 @@
 import org.tron.core.db.Manager;
 import org.tron.core.db.TransactionContext;
 import org.tron.core.db2.core.Chainbase;
+import org.tron.core.db2.core.Chainbase.Cursor;
 import org.tron.core.exception.AccountResourceInsufficientException;
 import org.tron.core.exception.BadItemException;
 import org.tron.core.exception.ContractExeException;
@@ -784,8 +785,10 @@ public WitnessList getPaginatedNowWitnessList(long offset, long limit) throws
       In the maintenance period, the VoteStores will be cleared.
       To avoid the race condition of VoteStores deleted but Witness vote counts not updated,
       return retry error.
+      Only apply to non-solidity request.
     */
-    if (chainBaseManager.getDynamicPropertiesStore().getStateFlag() == 1) {
+    boolean isSolidityRequest = Args.getInstance().isSolidityNode() || (getCursor() == Cursor.SOLIDITY);
+    if (!isSolidityRequest && chainBaseManager.getDynamicPropertiesStore().getStateFlag() == 1) {
       String message =
           "Service temporarily unavailable during maintenance period. Please try again later.";
       throw new MaintenanceUnavailableException(message);