Google app engine local server won't run on eclipse

Issue

My app engine standard application was running till this morning and suddenly it won't run throwing the following error.

INFO: Overwriting system property key 'java.util.logging.config.file', value '/Users/sharon/Library/Application Support/google-cloud-tools-java/managed-cloud-sdk/LATEST/google-cloud-sdk/platform/google_appengine/google/appengine/tools/java/config/sdk/logging.properties' with value 'WEB-INF/logging.properties' from '/Users/sharon/eclipse-workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp2/Lily/WEB-INF/appengine-web.xml'
2023-10-12 17:45:17.863:INFO::main: Logging initialized @768ms to org.eclipse.jetty.util.log.StdErrLog
2023-10-12 17:45:17.936:WARN:oejs.AbstractConnector:main: Ignoring deprecated socket close linger time
Exception in thread "main" java.lang.NoClassDefFoundError: com/google/apphosting/runtime/SessionStore
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:756)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:468)
    at java.net.URLClassLoader.access$100(URLClassLoader.java:74)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:369)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:363)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:362)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
    at com.google.appengine.tools.development.DevAppServerClassLoader.loadClass(DevAppServerClassLoader.java:117)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
    at com.google.apphosting.runtime.jetty9.SessionManagerHandler.create(SessionManagerHandler.java:75)
    at com.google.appengine.tools.development.jetty9.JettyContainerService.startContainer(JettyContainerService.java:360)
    at com.google.appengine.tools.development.AbstractContainerService.startup(AbstractContainerService.java:293)
    at com.google.appengine.tools.development.AutomaticInstanceHolder.startUp(AutomaticInstanceHolder.java:42)
    at com.google.appengine.tools.development.AbstractModule.startup(AbstractModule.java:102)
    at com.google.appengine.tools.development.Modules.startup(Modules.java:118)
    at com.google.appengine.tools.development.DevAppServerImpl.doStart(DevAppServerImpl.java:280)
    at com.google.appengine.tools.development.DevAppServerImpl.access$000(DevAppServerImpl.java:57)
    at com.google.appengine.tools.development.DevAppServerImpl$1.run(DevAppServerImpl.java:229)
    at com.google.appengine.tools.development.DevAppServerImpl$1.run(DevAppServerImpl.java:227)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.google.appengine.tools.development.DevAppServerImpl.start(DevAppServerImpl.java:227)
    at com.google.appengine.tools.development.DevAppServerMain$StartAction.apply(DevAppServerMain.java:381)
    at com.google.appengine.tools.util.Parser$ParseResult.applyArgs(Parser.java:58)
    at com.google.appengine.tools.development.DevAppServerMain.run(DevAppServerMain.java:239)
    at com.google.appengine.tools.development.DevAppServerMain.main(DevAppServerMain.java:230)
Caused by: java.lang.ClassNotFoundException: com.google.apphosting.runtime.SessionStore
    at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
    at com.google.appengine.tools.development.DevAppServerClassLoader.loadClass(DevAppServerClassLoader.java:117)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
    ... 28 more

I don't understand what the error means. What could be the reason? I noticed that it is happening after I upgraded the gcloud sdk version to 45.0.0 but I created another app engine standard application and it works fine.

Solution

This appears to be a bug or regression in cloud sdk 450.0.0 released 2023-10-10 https://cloud.google.com/sdk/docs/release-notes

Specifically:

App Engine Updated the Java SDK to version 2.0.20 build from the open source project

We were able to get local dev server working by pinning the cloudSdk version in our build.gradle file:

appengine {
    // Configure the Cloud SDK version
    tools {
        cloudSdkVersion = '449.0.0'
    }
...etc

Answered By - Spencer Alexander