Question

我已为我想在Heroku上部署的postgresql应用设置了一个远程gradle数据库。在我的机器上运行我的应用程序时它工作正常。但是，我很难连接到我在Heroku上设置的数据库，所以我想我只是尝试连接到我的远程数据库。这是我的应用日志中出现的错误：

2016-08-18T13:28:12.606715+00:00 app[web.1]: [JarClassLoader] INFO:  findResource(): unable to locate "org/postgresql/translation/messages_en.properties"
2016-08-18T13:28:12.609362+00:00 app[web.1]: Exception in thread "main" java.lang.reflect.InvocationTargetException
2016-08-18T13:28:12.609487+00:00 app[web.1]:    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
2016-08-18T13:28:12.609542+00:00 app[web.1]:    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
2016-08-18T13:28:12.609642+00:00 app[web.1]:    at java.lang.reflect.Method.invoke(Method.java:498)
2016-08-18T13:28:12.609715+00:00 app[web.1]:    at com.simontuffs.onejar.Boot.main(Boot.java:161)
2016-08-18T13:28:12.609970+00:00 app[web.1]: Caused by: org.postgresql.util.PSQLException: Connection to localhost:5432 refused. Check that the hostname and port are correct and that the postmaster is accepting TCP/IP connections.
2016-08-18T13:28:12.610011+00:00 app[web.1]:    at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:239)
2016-08-18T13:28:12.610060+00:00 app[web.1]:    at org.postgresql.core.ConnectionFactory.openConnection(ConnectionFactory.java:66)
2016-08-18T13:28:12.610112+00:00 app[web.1]:    at org.postgresql.jdbc2.AbstractJdbc2Connection.<init>(AbstractJdbc2Connection.java:127)
2016-08-18T13:28:12.610162+00:00 app[web.1]:    at org.postgresql.jdbc3.AbstractJdbc3Connection.<init>(AbstractJdbc3Connection.java:29)
2016-08-18T13:28:12.610440+00:00 app[web.1]:    at org.postgresql.Driver.connect(Driver.java:282)
2016-08-18T13:28:12.610602+00:00 app[web.1]:    at net.bethydiakabana.mbta.MbtaApplication.run(MbtaApplication.java:79)
2016-08-18T13:28:12.611050+00:00 app[web.1]: Caused by: java.net.ConnectException: Connection refused
2016-08-18T13:28:12.611072+00:00 app[web.1]:    at java.net.PlainSocketImpl.socketConnect(Native Method)
2016-08-18T13:28:12.611122+00:00 app[web.1]:    at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
2016-08-18T13:28:12.611146+00:00 app[web.1]:    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
2016-08-18T13:28:12.611170+00:00 app[web.1]:    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
2016-08-18T13:28:12.611286+00:00 app[web.1]:    at org.postgresql.core.PGStream.<init>(PGStream.java:61)
2016-08-18T13:28:12.611331+00:00 app[web.1]:    ... 23 more
2016-08-18T13:28:12.688094+00:00 heroku[web.1]: Process exited with status 1
2016-08-18T13:28:12.703273+00:00 heroku[web.1]: State changed from starting to crashed

我已经读过我需要更改postgres配置文件中的权限但我仍然遇到相同的错误。在windows机器上解决此问题的最佳方法是什么？

修改

我已经设置了heroku postgres数据库，看看这是否会有所帮助。我不确定它是否仍然存在连接问题以及定位主类。是否仍然值得连接到我的原始数据库？这是我现在得到的错误：

 Starting process with command `java -Ddw.server.connector.port=37275 -Ddw.database.user=mmcyajlpsbacac -Ddw.database.password=C6nrfQzuoS2ZEMDaTqVEssPDxa -Ddw.database.url=jdbc:postgresql://ec2-54-235-254-199.compute-1.amazonaws.com:5 432/d8hvhhr0h3hr8d?user=mmcyajlpsbacac&password=C6nrfQzuoS2ZEMDaTqVEssPDxa&sslmo de=require  $JAVA_OPTS -jar build/libs/mbta-tweets.jar server config.yaml`
2016-08-18T17:25:22.842387+00:00 app[web.1]: Setting JAVA_TOOL_OPTIONS defaults based on dyno size. Custom settings will override them.
2016-08-18T17:25:22.846667+00:00 app[web.1]: Picked up JAVA_TOOL_OPTIONS: -Xmx350m -Xss512k -Dfile.encoding=UTF-8
2016-08-18T17:25:23.220849+00:00 app[web.1]: Error: Could not find or load main class 432.d8hvhhr0h3hr8d?user=mmcyajlpsbacac&password=C6nrfQzuoS2ZEMDaTqVEssPDxa&sslmo
2016-08-18T17:25:23.317758+00:00 heroku[web.1]: Process exited with status 1
2016-08-18T17:25:23.331809+00:00 heroku[web.1]: State changed from starting to crashed

以下是配置类读取的yaml配置的摘录：

server:
  type: simple
  applicationContextPath: /application
  adminContextPath: /admin
  connector:
    type: http
    port: 8080

database:
  # the name of your JDBC driver
  driverClass: org.postgresql.Driver

  # the username
  user: someusername

  # the password
  password: somepassword

  # the JDBC URL
  url: jdbc:postgresql://host:port/dbname?user=username&password=password

这是我的procfile：

web: java $JAVA_OPTS -Ddw.server.connector.port=$PORT -Ddw.database.user=$JDBC_DATABASE_USERNAME -Ddw.database.password=$JDBC_DATABASE_PASSWORD -Ddw.database.url=$JDBC_DATABASE_URL  $JAVA_OPTS -jar build/libs/mbta-tweets.jar server config.yaml

Answer 1

此消息：

Caused by: org.postgresql.util.PSQLException: Connection to localhost:5432 refused

建议您尝试连接到Heroku上localhost上的数据库，这当然不正确。您能说明如何在Java代码中配置数据库连接吗？

postgres服务器拒绝连接到heroku

1 个答案: