not able to connect google cloud sql from google app engine

问题

getting logMessage: "[

j~gcp-ws-203608/20180510t123822.409615356828549281].<stdout>: 2018-05-10 07:20:08.036 ERROR 1 --- [Request5396402F] com.zaxxer.hikari.pool.HikariPool        : HikariPool-1 - Exception during pool initialization.

com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Could not create connection to database server.
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.8.0_112-google-v7]
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:1.8.0_112-google-v7]
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.8.0_112-google-v7]
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[na:1.8.0_112-google-v7]
    at com.mysql.jdbc.Util.handleNewInstance(Util.java:411) ~[jdbc-mysql-connector.jar:na]
    at com.mysql.jdbc.Util.getInstance(Util.java:386) ~[jdbc-mysql-connector.jar:na]
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1014) ~[jdbc-mysql-connector.jar:na]

dependency used:

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency> 

<dependency>
  <groupId>com.google.cloud.sql</groupId>
  <artifactId>mysql-socket-factory-connector-j-6</artifactId>
  <version>1.0.5</version>
</dependency>

回答1:

It seems that something might be wrong with the way you are setting up the connection to the database. Please make sure that:

The proper service account for accessing Cloud SQL from App Engine is setup (if the App Engine application and the Cloud SQL instance are in different Google Cloud Platform projects)
You have an already created database in Cloud SQL
You have added all the correct parameter values (Cloud SQL instance connection name, database, user, and password) to the pom.xml file.
You are creating a connection URL and establishing a connection to the database in the same way it is done in this example

来源：https://stackoverflow.com/questions/50267998/not-able-to-connect-google-cloud-sql-from-google-app-engine

标签

google-app-engine

google-cloud-sql