title: Spring Boot application crashes on Heroku code=H10
body: <p>I have deployed a springboot application on heroku app. The application worked fine for quite a long time.
  But now suddenly i get an error Code="H10" and the app crashes. The build is successfull when deploying to heroku and also the application works locally as well.</p>
  
  <p>The application is in the git repository : <a href="https://github.com/hmanoharan-12/saloncityservice" rel="nofollow noreferrer">https://github.com/hmanoharan-12/saloncityservice</a></p>
  
  <p>I get the error when i send a request to the API. 
  eg:- <code>https://saloncityservice.herokuapp.com/getuser</code></p>
  
  <p>Error in Logs :</p>
  
  <pre><code>2019-11-03T05:56:00.133635+00:00 app[web.1]: at com.webservice.restfulservice.ServiceApplication.main(ServiceApplication.java:10) ~[classes!/:0.0.1-SNAPSHOT]
  2019-11-03T05:56:00.133637+00:00 app[web.1]: at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_222-heroku]
  2019-11-03T05:56:00.133638+00:00 app[web.1]: at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_222-heroku]
  2019-11-03T05:56:00.13364+00:00 app[web.1]: at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_222-heroku]
  2019-11-03T05:56:00.133641+00:00 app[web.1]: at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_222-heroku]
  2019-11-03T05:56:00.133642+00:00 app[web.1]: at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:48) ~[demo-0.0.1-SNAPSHOT.jar:0.0.1-SNAPSHOT]
  2019-11-03T05:56:00.133643+00:00 app[web.1]: at org.springframework.boot.loader.Launcher.launch(Launcher.java:87) ~[demo-0.0.1-SNAPSHOT.jar:0.0.1-SNAPSHOT]
  2019-11-03T05:56:00.133645+00:00 app[web.1]: at org.springframework.boot.loader.Launcher.launch(Launcher.java:51) ~[demo-0.0.1-SNAPSHOT.jar:0.0.1-SNAPSHOT]
  2019-11-03T05:56:00.133646+00:00 app[web.1]: at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:52) ~[demo-0.0.1-SNAPSHOT.jar:0.0.1-SNAPSHOT]
  2019-11-03T05:56:00.133651+00:00 app[web.1]: Caused by: com.mysql.cj.exceptions.CJCommunicationsException: Communications link failure
  2019-11-03T05:56:00.133653+00:00 app[web.1]:
  2019-11-03T05:56:00.133654+00:00 app[web.1]: The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
  2019-11-03T05:56:00.133656+00:00 app[web.1]: at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.8.0_222-heroku]
  2019-11-03T05:56:00.133657+00:00 app[web.1]: at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:1.8.0_222-heroku]
  2019-11-03T05:56:00.133658+00:00 app[web.1]: at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.8.0_222-heroku]
  2019-11-03T05:56:00.13366+00:00 app[web.1]: at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[na:1.8.0_222-heroku]
  2019-11-03T05:56:00.133661+00:00 app[web.1]: at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:61) ~[mysql-connector-java-8.0.17.jar!/:8.0.17]
  2019-11-03T05:56:00.133663+00:00 app[web.1]: at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:105) ~[mysql-connector-java-8.0.17.jar!/:8.0.17]
  2019-11-03T05:56:00.133664+00:00 app[web.1]: at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:151) ~[mysql-connector-java-8.0.17.jar!/:8.0.17]
  2019-11-03T05:56:00.133666+00:00 app[web.1]: at com.mysql.cj.exceptions.ExceptionFactory.createCommunicationsException(ExceptionFactory.java:167) ~[mysql-connector-java-8.0.17.jar!/:8.0.17]
  2019-11-03T05:56:00.133667+00:00 app[web.1]: at com.mysql.cj.protocol.a.NativeSocketConnection.connect(NativeSocketConnection.java:91) ~[mysql-connector-java-8.0.17.jar!/:8.0.17]
  2019-11-03T05:56:00.133668+00:00 app[web.1]: at com.mysql.cj.NativeSession.connect(NativeSession.java:150) ~[mysql-connector-java-8.0.17.jar!/:8.0.17]
  2019-11-03T05:56:00.13367+00:00 app[web.1]: at com.mysql.cj.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:947) ~[mysql-connector-java-8.0.17.jar!/:8.0.17]
  2019-11-03T05:56:00.133671+00:00 app[web.1]: at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:817) ~[mysql-connector-java-8.0.17.jar!/:8.0.17]
  2019-11-03T05:56:00.133673+00:00 app[web.1]: ... 61 common frames omitted
  2019-11-03T05:56:00.133675+00:00 app[web.1]: Caused by: java.net.SocketTimeoutException: connect timed out
  2019-11-03T05:56:00.133676+00:00 app[web.1]: at java.net.PlainSocketImpl.socketConnect(Native Method) ~[na:1.8.0_222-heroku]
  2019-11-03T05:56:00.133678+00:00 app[web.1]: at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) ~[na:1.8.0_222-heroku]
  2019-11-03T05:56:00.133679+00:00 app[web.1]: at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) ~[na:1.8.0_222-heroku]
  2019-11-03T05:56:00.13368+00:00 app[web.1]: at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) ~[na:1.8.0_222-heroku]
  2019-11-03T05:56:00.133682+00:00 app[web.1]: at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) ~[na:1.8.0_222-heroku]
  2019-11-03T05:56:00.133683+00:00 app[web.1]: at java.net.Socket.connect(Socket.java:589) ~[na:1.8.0_222-heroku]
  2019-11-03T05:56:00.133684+00:00 app[web.1]: at com.mysql.cj.protocol.StandardSocketFactory.connect(StandardSocketFactory.java:155) ~[mysql-connector-java-8.0.17.jar!/:8.0.17]
  2019-11-03T05:56:00.13369+00:00 app[web.1]: at com.mysql.cj.protocol.a.NativeSocketConnection.connect(NativeSocketConnection.java:65) ~[mysql-connector-java-8.0.17.jar!/:8.0.17]
  2019-11-03T05:56:00.133694+00:00 app[web.1]: ... 64 common frames omitted
  2019-11-03T05:56:00.133695+00:00 app[web.1]:
  2019-11-03T05:56:00.213001+00:00 app[web.1]: 2019-11-03 05:56:00.212  INFO 4 --- [           main] o.hibernate.jpa.internal.util.LogHelper  : HHH000204: Processing PersistenceUnitInfo [
  2019-11-03T05:56:00.213005+00:00 app[web.1]: name: default
  2019-11-03T05:56:00.213006+00:00 app[web.1]: ...]
  2019-11-03T05:56:00.327049+00:00 app[web.1]: 2019-11-03 05:56:00.326  INFO 4 --- [           main] org.hibernate.Version                    : HHH000412: Hibernate Core {5.3.11.Final}
  2019-11-03T05:56:00.329135+00:00 app[web.1]: 2019-11-03 05:56:00.328  INFO 4 --- [           main] org.hibernate.cfg.Environment            : HHH000206: hibernate.properties not found
  2019-11-03T05:56:00.586215+00:00 app[web.1]: 2019-11-03 05:56:00.585  INFO 4 --- [           main] o.hibernate.annotations.common.Version   : HCANN000001: Hibernate Commons Annotations {5.0.4.Final}
  2019-11-03T05:56:00.990198+00:00 app[web.1]: 2019-11-03 05:56:00.989  INFO 4 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Starting...
  2019-11-03T05:56:18.877745+00:00 heroku[web.1]: Error R10 (Boot timeout) -&gt; Web process failed to bind to $PORT within 90 seconds of launch
  2019-11-03T05:56:18.910371+00:00 heroku[web.1]: Stopping process with SIGKILL
  2019-11-03T05:56:19.00654+00:00 heroku[web.1]: Process exited with status 137
  2019-11-03T05:56:19.052964+00:00 heroku[web.1]: State changed from starting to crashed
  2019-11-03T05:56:47.774128+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/getuser" host=saloncityservice.herokuapp.com request_id=d15a28c2-0725-45de-a2e9-b41f9e3469d0 fwd="123.231.87.83" dyno= connect= service= status=503 bytes= protocol=https```
  </code></pre>