java - NoClassDefFoundError : javax.naming.ldap.LdapName是GAE中的受限类

Question

我们有 Goole App Engine Java 项目，它使用 Plivo(SMS，电话调用平台)发送 SMS。它使用Plivo Java Library 发送短信。当我尝试发送短信时，出现 NoClassDefFoundError 异常

java.lang.NoClassDefFoundError: javax.naming.ldap.LdapName is a restricted class. Please see the Google  App Engine developer's guide for more details.
    at com.google.appengine.tools.development.agent.runtime.Runtime.reject(Runtime.java:51)
    at org.apache.http.conn.ssl.AbstractVerifier.extractCNs(AbstractVerifier.java:277)
    at org.apache.http.conn.ssl.AbstractVerifier.getCNs(AbstractVerifier.java:265)
    at org.apache.http.conn.ssl.AbstractVerifier.verify(AbstractVerifier.java:157)
    at org.apache.http.conn.ssl.AbstractVerifier.verify(AbstractVerifier.java:140)
    at org.apache.http.conn.ssl.SSLSocketFactory.verifyHostname(SSLSocketFactory.java:561)
    at org.apache.http.conn.ssl.SSLSocketFactory.connectSocket(SSLSocketFactory.java:536)
    at org.apache.http.conn.ssl.SSLSocketFactory.connectSocket(SSLSocketFactory.java:403)
    at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:177)
    at org.apache.http.impl.conn.ManagedClientConnectionImpl.open(ManagedClientConnectionImpl.java:304)
    at org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:611)
    at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:446)
    at org.apache.http.impl.client.AbstractHttpClient.doExecute(AbstractHttpClient.java:863)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:106)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:57)
    at com.plivo.helper.api.client.RestAPI.request(RestAPI.java:106)

如何解决这个问题？

Answer 1

您可能知道，App Engine 在沙盒环境中运行，因此某些类不可用。 whitelist页面将告诉您可以使用哪些类。

如果您需要使用这个特定的第三方库，您可以在 Compute Engine 上运行应用的相关部分，或者查看 Managed VMs ，它没有与 App Engine 上的常规 Java 模块相同的限制。缺点是您无法享受相同的自动缩放特性，并且托管虚拟机仍处于预览阶段。