Google App Engine 中的 'platform method missing' 和 'NoSuchMethod' 错误

Question

我有一个 Google App Engine 服务器，它是运行 Google Cloud Endpoints v1 和 Firebase Admin SDK。

当我的移动应用程序访问其中一个云端点时，我在服务器上收到以下错误，特别是生成 HTTP 请求的端点（不确定这是否相关）。但是，从该应用程序访问的所有其他云端点均正常工作。

com.google.appengine.repackaged.com.google.protobuf.UnsafeUtil supportsUnsafeByteBufferOperations
WARNING: platform method missing - proto runtime falling back to safer methods: java.security.AccessControlException: access denied ("java.lang.RuntimePermission" "accessClassInPackage.sun.misc")
com.google.appengine.repackaged.com.google.protobuf.UnsafeUtil supportsUnsafeArrayOperations
WARNING: platform method missing - proto runtime falling back to safer methods: java.security.AccessControlException: access denied ("java.lang.RuntimePermission" "accessClassInPackage.sun.misc")
com.google.appengine.repackaged.com.google.protobuf.UnsafeUtil supportsUnsafeCopyMemory
WARNING: copyMemory is missing from platform - proto runtime falling back to safer methods.
com.google.api.server.spi.SystemServiceServlet init
INFO: SPI restricted: true
com.google.api.server.spi.SystemService invokeServiceMethod
SEVERE: exception occurred while calling backend method
java.lang.NoSuchMethodError: com.google.common.base.Preconditions.checkState(ZLjava/lang/String;Ljava/lang/Object;)V
    at com.google.firebase.FirebaseApp.checkNotDeleted(FirebaseApp.java:314)
    at com.google.firebase.FirebaseApp.getOptions(FirebaseApp.java:260)
    at com.google.firebase.auth.FirebaseAuth.<init>(FirebaseAuth.java:74)
    at com.google.firebase.auth.FirebaseAuth.<init>(FirebaseAuth.java:61)
    at com.google.firebase.auth.FirebaseAuth.<init>(FirebaseAuth.java:52)
    at com.google.firebase.auth.FirebaseAuth$FirebaseAuthService.<init>(FirebaseAuth.java:316)
    at com.google.firebase.auth.FirebaseAuth.getInstance(FirebaseAuth.java:98)
    at com.google.firebase.auth.FirebaseAuth.getInstance(FirebaseAuth.java:85)

有人可以指点一下吗？

我查看了类似的报告，这些报告表明存在 Guava 依赖项的版本冲突。当运行mvn dependency:tree时，说明只有一个Guava依赖（v20.0），被Firebase Admin SDK包含。

Answer 1

不知道发生了什么，但用 mvn clean 修复了它。

Google App Engine 中的 'platform method missing' 和 'NoSuchMethod' 错误

'platform method missing' and 'NoSuchMethod' errors in Google App Engine

java

google-app-engine

maven

firebase

firebase-admin