请注意，InitialContext的javadoc会发出警告：

An InitialContext instance is not synchronized against concurrent
access by multiple threads. Multiple threads each manipulating a
different InitialContext instance need not synchronize.
Threads that need to access a single InitialContext instance
concurrently should synchronize amongst themselves and provide the
necessary locking.

因此，将字段设置为静态并不一定是个好主意，因为您需要同步每个lookup(jndiName)调用，这可能会导致James R. Perkins注解中的其他问题。
但是，正如您已经展示的，getAuthenticationProfile(String credId)调用lookup两次，没有理由不能让BeanFactory保存一个InitialContext，以便通过在相同的调用方法中重用InitialContext来减少示例的数量。

public class BeanFactory {

    private final InitialContext ctx;
    private BeanFactory(InitialContext initialContext) {
        this.ctx = initialContext;
    }
    private static final Logger logger = LogManager.getLogger(BeanFactory.class.getName());
    /**JNDI lookup*/
    public <T> T lookup(String jndiName){
        // logger.info("Inside bean BeanFactory lookup: " + jndiName);
        try {
            return (T) ctx.lookup(jndiName);
        } catch (Exception e) {
            RuntimeException re = new RuntimeException("Could not find jndi: "+jndiName, e);
            logger.error(re);
            throw re;
        }
    }
    /**Setup a new BeanFactory */
    public static BeanFactory create() {
       try {
            return new BeanFactory(new InitialContext());
        } catch (Exception e) {
            throw new RuntimeException("Could not create a new context", e);
            logger.error(re);
            throw re;
        }
    }

这允许getAuthenticationProfile使用单个InitialContext进行2次查找：

BeanFactory ctx = BeanFactory.create();
ResourceProceduresDao            dao = ctx.lookup(ResourceProceduresDao.JNDI_NAME);
AuthenticationProfileRemote apRemote = ctx.lookup(AuthenticationProfileRemote.JNDI_NAME);

您还可以考虑将BeanFactory保存为本地线程是否会有所帮助，尽管我非常担心在应用服务器上这样做，因为您可能无法控制哪些线程和多少线程示例化InitialContext，以及它们从什么上下文运行什么。但是，它可能适合在访问EJB服务器逻辑的独立客户端程序中使用：

private static final ThreadLocal<BeanFactory> BEANS = ThreadLocal.withInitial(BeanFactory::create);
private static BeanFactory local() {
    return BEANS.get();
}
// Example lookups:
ResourceProceduresDao            dao = BeanFactory.local().lookup(ResourceProceduresDao.JNDI_NAME);
AuthenticationProfileRemote apRemote = BeanFactory.local().lookup(AuthenticationProfileRemote.JNDI_NAME);