MariaDbPoolDataSource's initiailzation freezes for 2 minutes with aurora

I use a MariaDbPoolDataSource connected to Aurora Mysql.

I use the url `jdbc:mysql:aurora://my.cluster-xxxxxxxx.us-east-1.rds.amazonaws.com/dbuseLegacyDatetimeCode=false&serverTimezone=GMT`, `minPoolSize=1` and `maxPoolSize = 8`.

In AWS Java 8 lambda sometimes the pool initialization freezes.
I reproduce this issue on my PC using Java 11, I get the follow stack trace

"nettyCallPool-4-1 @call-handler#3" #14 prio=10 os_prio=0 tid=0x00007f1bb8088800 nid=0x72c0 runnable [0x00007f1bdcaf8000]
java.lang.Thread.State: RUNNABLE
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.socketRead(SocketInputStream.java:116)
at java.net.SocketInputStream.read(SocketInputStream.java:171)
at java.net.SocketInputStream.read(SocketInputStream.java:141)
at java.io.FilterInputStream.read(FilterInputStream.java:133)
at org.mariadb.jdbc.internal.io.input.ReadAheadBufferedStream.fillBuffer(ReadAheadBufferedStream.java:130)
at org.mariadb.jdbc.internal.io.input.ReadAheadBufferedStream.read(ReadAheadBufferedStream.java:103)

• locked <0x00000000dce8c1b8> (a org.mariadb.jdbc.internal.io.input.ReadAheadBufferedStream)
  at org.mariadb.jdbc.internal.io.input.StandardPacketInputStream.getPacketArray(StandardPacketInputStream.java:244)
  at org.mariadb.jdbc.internal.io.input.StandardPacketInputStream.getPacket(StandardPacketInputStream.java:215)
  at org.mariadb.jdbc.internal.com.read.ReadInitialHandShakePacket.<init>(ReadInitialHandShakePacket.java:89)
  at org.mariadb.jdbc.internal.protocol.AbstractConnectProtocol.handleConnectionPhases(AbstractConnectProtocol.java:688)
  at org.mariadb.jdbc.internal.protocol.AbstractConnectProtocol.connect(AbstractConnectProtocol.java:412)
  at org.mariadb.jdbc.internal.protocol.AbstractConnectProtocol.connect(AbstractConnectProtocol.java:369)
  at org.mariadb.jdbc.internal.protocol.AuroraProtocol.loop(AuroraProtocol.java:167)
  at org.mariadb.jdbc.internal.failover.impl.AuroraListener.reconnectFailedConnection(AuroraListener.java:210)
  at org.mariadb.jdbc.internal.failover.impl.MastersSlavesListener.initializeConnection(MastersSlavesListener.java:170)
  at org.mariadb.jdbc.internal.failover.FailoverProxy.<init>(FailoverProxy.java:116)
  at org.mariadb.jdbc.internal.util.Utils.retrieveProxy(Utils.java:542)
  at org.mariadb.jdbc.internal.util.pool.Pool.addConnection(Pool.java:218)
  at org.mariadb.jdbc.internal.util.pool.Pool.<init>(Pool.java:127)
  at org.mariadb.jdbc.internal.util.pool.Pools.retrievePool(Pools.java:53)
• locked <0x00000000dc162190> (a java.util.concurrent.ConcurrentHashMap)
  at org.mariadb.jdbc.MariaDbPoolDataSource.initialize(MariaDbPoolDataSource.java:624)
• locked <0x00000000dbfdae08> (a org.mariadb.jdbc.MariaDbPoolDataSource)

After two minutes I get the pool working without exception.

This behavior fits really bad in a Lambda.