we need to connect to an external service using at least TLS 1.1, which doesn\'t work on the local development server using the Java SDK v. 1.9.32. Is there a way to force t
Adding to the above answer, since TLS 1.1 and 1.2 are disabled by default on JDK 7, if you don't want to use JDK 8 you can also try modifying the last line of dev_appserver.sh with the following flags:
exec "${RUN_JAVA}" "${SCRIPT_NAME}" \
-Ddeployment.security.TLSv1.1=true -Ddeployment.security.TLSv1.2=true -ea -cp "${JAR_FILE}" \
com.google.appengine.tools.KickStart \
com.google.appengine.tools.development.DevAppServerMain "$@"
Or dev_appserver.cmd on Windows:
java -Ddeployment.security.TLSv1.1=true -Ddeployment.security.TLSv1.2=true -cp "%~dp0\..\lib\appengine-tools-api.jar" ^
com.google.appengine.tools.KickStart ^
com.google.appengine.tools.development.DevAppServerMain %*
My local Appengine development server started to use TLS 1.2 once I installed JDK 8 (before I was using JDK 7). JDK 8 uses TLS 1.2 by default.