Hi,
Trying to enable auto-restarts and class hot-reloading for a Java app by
adding spring-boot-devtools to an App Engine Standard Java 8 app. I get
the following error when I run "mvn appengine:run":
[INFO] GCLOUD: java.lang.IllegalArgumentException: Unable to find the main
class to restart
[INFO] GCLOUD: at org.springframework.util.Assert.notNull(Assert.java:134)
[INFO] GCLOUD: at
org.springframework.boot.devtools.restart.Restarter.doStart(Restarter.java:285)
[INFO] GCLOUD: at
org.springframework.boot.devtools.restart.Restarter.start(Restarter.java:273)
[INFO] GCLOUD: at
org.springframework.boot.devtools.restart.Restarter$1.call(Restarter.java:174)
[INFO] GCLOUD: at
org.springframework.boot.devtools.restart.Restarter$1.call(Restarter.java:170)
[INFO] GCLOUD: at
org.springframework.boot.devtools.restart.Restarter$LeakSafeThread.run(Restarter.java:627)
The app starts fine if I remove the spring-boot-devtools dependency but
then I have to restart the app manually every time I change something:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</exclusion>
</exclusions>
</dependency>
Is there a ways to get spring-boot-devtools working with App Engine? What's
the recommended way for hot-reloading/auto-restarts for App Engine Java
applications?
Full codebase available here for reference:
https://github.com/mustpax/appengine-java-spring-boot-test
Thanks!
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