Code review comment: The most risky bug in this code is: A potential resource leak due to the improper handling of `client` when exceptions other than `NoSuchMethodException` are thrown.  You can modify the code like this: ```java public Table getTable(String dbName, String tableName) {     try (Timer ignored = Tracers.watchScope(EXTERNAL, "HMS.getTable")) {         RecyclableClient client = null;         StarRocksConnectorException connectionException = null;         Object[] args = {dbName, tableName};         String messageIfError = String.format("Failed to get table [%s.%s]", dbName, tableName);          try {             client = getClient();             Class<?>[] argClasses = ClassUtils.getCompatibleParamClasses(args);             Method method = client.hiveClient.getClass().getDeclaredMethod("getTable", argClasses);             return (Table) method.invoke(client.hiveClient, args);         } catch (NoSuchMethodException e) {             // In HMS, throw NoSuchObjectException if db or table does not exist             LOG.warn("{} table not find", String.format("[%s.%s]", dbName, tableName));             return null;         } catch (Throwable e) {             LOG.error(messageIfError, e);             if (client != null) {                 client.close();             }             connectionException = new StarRocksConnectorException(messageIfError + ", msg: " + e.getMessage(), e);             throw connectionException;         } finally {             if (connectionException == null && client != null) {                 client.finish();             }         }     } } ```  Explanation: - The main change happens within the catch block for `Throwable`. We ensure that `client` is closed if it's not null before throwing a new exception to avoid a potential resource leak. - Next, within the `finally` block, we have a condition that now only calls `client.finish()` if there was no exception (`connectionException == null`) and `client` is not null. If there is an exception, we expect the catch block to close the client instead. - The `close()` method should be called on the `client` object whenever we are done with it, no matter if an exception has been thrown or not, to make sure resources are properly released. The original issue was that `client` could potentially never be closed if any exception occurred because the `close()` call was conditioned to a null check for `client` and a non-null check for `connectionException`, which is a logical mistake because `connectionException` will always be null at that point within the `finally` block unless an exception has been thrown and caught above.

Code under review:
public Table getTable(String dbName, String tableName) {
        try (Timer ignored = Tracers.watchScope(EXTERNAL, "HMS.getTable")) {
            RecyclableClient client = null;
            StarRocksConnectorException connectionException = null;
            Object[] args = {dbName, tableName};
            String messageIfError = String.format("Failed to get table [%s.%s]", dbName, tableName);

            try {
                client = getClient();
                Class<?>[] argClasses = ClassUtils.getCompatibleParamClasses(args);
                Method method = client.hiveClient.getClass().getDeclaredMethod("getTable", argClasses);
                return (Table) method.invoke(client.hiveClient, args);
            } catch (NoSuchMethodException e) {
                
                LOG.warn("{} table not find", String.format("[%s.%s]", dbName, tableName));
                return null;
            } catch (Throwable e) {
                LOG.error(messageIfError, e);
                connectionException = new StarRocksConnectorException(messageIfError + ", msg: " + e.getMessage(), e);
                throw connectionException;
            } finally {
                if (client == null && connectionException != null) {
                    LOG.error("Failed to get hive client. {}", connectionException.getMessage());
                } else if (connectionException != null) {
                    LOG.error("An exception occurred when using the current long link " +
                            "to access metastore. msg: {}", messageIfError);
                    client.close();
                } else if (client != null) {
                    client.finish();
                }
            }
        }
    }


Revised code:
public Table getTable(String dbName, String tableName) {
        try (Timer ignored = Tracers.watchScope(EXTERNAL, "HMS.getTable")) {
            return callRPC("getTable", String.format("Failed to get table [%s.%s]", dbName, tableName),
                    dbName, tableName);
        }
    }