TestNG @BeforeTest对象初始化问题

Question

public abstract class TestBase{

protected EnvironmentDetails envdetails;


@BeforeTest(alwaysRun = true)
@Parameters({ "envOld", "envNew", "env", "region", "prodcount", "unixuser", "unixpasswd", "mmPortOld", "mmPortNew" })
public void initialize(@Optional("xyz4") String envOld, @Optional("xyz4") String envNew, @Optional("xyz4") String env, @Optional("All") String region,
            @Optional("5") String prodcount, @Optional("") String unixuser, @Optional("") String unixpasswd, @Optional("6300") String mmPortOld,
            @Optional("6300") String mmPortNew) throws SQLException {

               //Populate envdetails
               //LOG envdetails
            }

}

public class myTest extends TestBase{

@Test(threadPoolSize = 1, invocationCount = 1, groups = { "usersort", "regression" }, dataProvider = "sortingDataProvider")
public void sortTest(final String region, String mmUrl, String servletUrl) {
    //LOG envdetails
}


@DataProvider(name = "sortingDataProvider", parallel = false)
public Object[][] provider(Method method) {
     Object[][] data = null;
     //populate data
     return data;

    }

在上面的代码中，我在 @BeforeTest 中初始化了对象'envdetails'，当我记录对象时，我发现它已正确填充。现在，当我尝试从sortTest方法访问它时，对象 envdetails中的每个实例变量在一次执行中为空，而在其他执行中填充显示，保持代码库和执行参数通过maven不变。这是某种线程问题，还是我犯了一些重大错误。