Error while connecting to mysql from container to container - docker

Question

I am getting some difficulties to connect from my scala/slick application from one container to mysql in another container.
Here is how I am running docker containers:
// MySQL
docker container run --publish 3306:3306 --name mysqlDb -e MYSQL_ROOT_PASSWORD=123123 -d mysql
// Scala/slick app
docker container run -v /Users/userHome/Sources/slick-dev-box:/home --expose=3306 -it --link mysqlDb:mysql hseeberger/scala-sbt
$ docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
f12b46821f69 hseeberger/scala-sbt "bash" About a minute ago Up About a minute 3306/tcp gracious_engelbart
afcd1902b741 mysql "docker-entrypoint.s…" About an hour ago Up 37 minutes 0.0.0.0:3306->3306/tcp, 33060/tcp mysqlDb
application.conf
mysql = {
profile = "slick.jdbc.MySQLProfile$"
dataSourceClass = "slick.jdbc.DatabaseUrlDataSource"
properties = {
driver = "com.mysql.cj.jdbc.Driver"
url = "jdbc:mysql://172.17.0.2:3360/slick"
user = "root"
password = "123123"
}
}
Error I am getting:
warn] There may be incompatibilities among your library dependencies; run 'evicted' to see detailed eviction warnings.
[info] Running com.avelimited.slick.demo.Runner
[error] (run-main-0) java.sql.SQLTransientConnectionException: mysql - Connection is not available, request timed out after 30005ms.
[error] java.sql.SQLTransientConnectionException: mysql - Connection is not available, request timed out after 30005ms.
[error] at com.zaxxer.hikari.pool.HikariPool.createTimeoutException(HikariPool.java:676)
[error] at com.zaxxer.hikari.pool.HikariPool.getConnection(HikariPool.java:190)
[error] at com.zaxxer.hikari.pool.HikariPool.getConnection(HikariPool.java:155)
[error] at com.zaxxer.hikari.HikariDataSource.getConnection(HikariDataSource.java:100)
[error] at slick.jdbc.hikaricp.HikariCPJdbcDataSource.createConnection(HikariCPJdbcDataSource.scala:14)
[error] at slick.jdbc.JdbcBackend$BaseSession.<init>(JdbcBackend.scala:494)
[error] at slick.jdbc.JdbcBackend$DatabaseDef.createSession(JdbcBackend.scala:46)
[error] at slick.jdbc.JdbcBackend$DatabaseDef.createSession(JdbcBackend.scala:37)
[error] at slick.basic.BasicBackend$DatabaseDef.acquireSession(BasicBackend.scala:250)
[error] at slick.basic.BasicBackend$DatabaseDef.acquireSession$(BasicBackend.scala:249)
[error] at slick.jdbc.JdbcBackend$DatabaseDef.acquireSession(JdbcBackend.scala:37)
[error] at slick.basic.BasicBackend$DatabaseDef$$anon$3.run(BasicBackend.scala:275)
[error] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
[error] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
[error] at java.lang.Thread.run(Thread.java:748)
[error] Caused by: java.lang.NullPointerException
[error] at slick.jdbc.DriverDataSource.getConnection(DriverDataSource.scala:101)
[error] at com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:369)
[error] at com.zaxxer.hikari.pool.PoolBase.newPoolEntry(PoolBase.java:198)
[error] at com.zaxxer.hikari.pool.HikariPool.createPoolEntry(HikariPool.java:467)
[error] at com.zaxxer.hikari.pool.HikariPool.access$100(HikariPool.java:71)
[error] at com.zaxxer.hikari.pool.HikariPool$PoolEntryCreator.call(HikariPool.java:706)
[error] at com.zaxxer.hikari.pool.HikariPool$PoolEntryCreator.call(HikariPool.java:692)
[error] at java.util.concurrent.FutureTask.run(FutureTask.java:266)
[error] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
[error] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
[error] at java.lang.Thread.run(Thread.java:748)
[error] Nonzero exit code: 1
What I've tried so far:
I tried to use different port like 3360 and 33060, but same result.
Networkwise, when I run ping from app container, I am getting response from mysql container and when I run cat /etc/hosts on app container:
root#f12b46821f69:/home# cat /etc/hosts
127.0.0.1 localhost
::1 localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
172.17.0.2 mysql afcd1902b741 mysqlDb
172.17.0.3 f12b46821f69
Please let me know if there is something else I could check to fix connection issue.

Answer 1

Well, apparently issue was to do with myql-connector driver,
here is the fix I have to apply:
// Before
libraryDependencies += "mysql" % "mysql-connector-java" % "5.1.34"
// After
libraryDependencies += "mysql" % "mysql-connector-java" % "8.0.11"