Run CI Tests on Java 17

[grant]

Run all CI tests on Java 17

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Related resources:

• JDK17 actions/setup-java#233
• Sept 2021 Release Status per Platform, Version & Binary Type adoptium/adoptium#74

[grant]

Adding JDK17 seems to work for all tests but 2 invoker tests:

 @Test
 public void background() throws Exception {
   backgroundTest("BackgroundSnoop");
 }

 @Test
 public void typedBackground() throws Exception {
   backgroundTest("TypedBackgroundSnoop");
 }

https://github.com/GoogleCloudPlatform/functions-framework-java/blob/73ee908f837288e2458d6268426fa80b7703e745/invoker/core/src/test/java/com/google/cloud/functions/invoker/IntegrationTest.java

Error:

https://github.com/GoogleCloudPlatform/functions-framework-java/runs/3667431236

{"severity": "ERROR", "logging.googleapis.com/sourceLocation": {"file": "com/google/cloud/functions/invoker/testfunctions/Log.java", "method": "service"}, "message": ""}

oops
java.lang.Exception: disaster
	at com.google.cloud.functions.invoker.testfunctions.Log.service(Log.java:23)
	at com.google.cloud.functions.invoker.HttpFunctionExecutor.service(HttpFunctionExecutor.java:67)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
	at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:755)
	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:547)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233)
	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1297)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:188)
	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:485)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:186)
	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1212)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
	at com.google.cloud.functions.invoker.runner.Invoker$NotFoundHandler.handle(Invoker.java:392)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
	at org.eclipse.jetty.server.Server.handle(Server.java:500)
	at org.eclipse.jetty.server.HttpChannel.lambda$handle$1(HttpChannel.java:383)
	at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:547)
	at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:375)
	at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:270)
	at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:311)
	at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103)
	at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:117)
	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:806)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:938)
	at java.base/java.lang.Thread.run(Thread.java:833)

[grant]

We should ask some Java experts on what the error means and the potential solution.

[grant]

This should be finished with #114