Unable to LOAD DATA FROM S3 FILE with :aurora: setting

When trying to load files from S3 using with the :aurora: option in the connect string we experience frequent failures resulting from read timeouts after about 20-40 seconds into a file load.

The problem is hit almost immediately if using multiple file loads at the same time. (i.e: 10 that would each take more than 20 seconds to load.)

With the 2.0.2 code these were thrown as: SQLNonTransientConnectionExceptions.

With the 2.2.0 and 2.2.1 code they are:
java.sql.SQLException: (conn=213) Communications link failure with primary host stage-b-hr-db-auroradbcluster-127qwjudpu2jb.cluster-ccucwzbnkosy.us-east-1.rds.amazonaws.com:3306. Read timed out
at org.mariadb.jdbc.internal.util.exceptions.ExceptionMapper.get(ExceptionMapper.java:198)
at org.mariadb.jdbc.internal.util.exceptions.ExceptionMapper.getException(ExceptionMapper.java:110)
at org.mariadb.jdbc.MariaDbStatement.executeExceptionEpilogue(MariaDbStatement.java:235)
at org.mariadb.jdbc.MariaDbStatement.executeInternal(MariaDbStatement.java:332)
at org.mariadb.jdbc.MariaDbStatement.executeUpdate(MariaDbStatement.java:517)
at com.mchange.v2.c3p0.impl.NewProxyStatement.executeUpdate(NewProxyStatement.java:410)
...
Caused by: java.sql.SQLException: Communications link failure with primary host stage-b-hr-db-auroradbcluster-127qwjudpu2jb.cluster-ccucwzbnkosy.us-east-1.rds.amazonaws.com:3306. Read timed out
Query is: LOAD DATA FROM S3 FILE ...
on HostAddress

{host='stage-b-hr-db-auroradbcluster-127qwjudpu2jb.cluster-ccucwzbnkosy.us-east-1.rds.amazonaws.com', port=3306}

,master=true. Driver has reconnect connection
at org.mariadb.jdbc.internal.failover.AbstractMastersListener.throwFailoverMessage(AbstractMastersListener.java:481)
at org.mariadb.jdbc.internal.failover.FailoverProxy.handleFailOver(FailoverProxy.java:309)
at org.mariadb.jdbc.internal.failover.FailoverProxy.executeInvocation(FailoverProxy.java:247)
at org.mariadb.jdbc.internal.failover.FailoverProxy.invoke(FailoverProxy.java:218)
at com.sun.proxy.$Proxy26.executeQuery(Unknown Source)
at org.mariadb.jdbc.MariaDbStatement.executeInternal(MariaDbStatement.java:326)
... 11 more
Caused by: java.net.SocketTimeoutException: Read timed out
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 sun.security.ssl.InputRecord.readFully(InputRecord.java:465)
at sun.security.ssl.InputRecord.read(InputRecord.java:503)
at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:983)
at sun.security.ssl.SSLSocketImpl.readDataRecord(SSLSocketImpl.java:940)
at sun.security.ssl.AppInputStream.read(AppInputStream.java:105)
at java.io.BufferedInputStream.fill(BufferedInputStream.java:246)
at java.io.BufferedInputStream.read1(BufferedInputStream.java:286)
at java.io.BufferedInputStream.read(BufferedInputStream.java:345)
at org.mariadb.jdbc.internal.io.input.StandardPacketInputStream.getPacketArray(StandardPacketInputStream.java:237)
at org.mariadb.jdbc.internal.io.input.StandardPacketInputStream.getPacket(StandardPacketInputStream.java:207)
at org.mariadb.jdbc.internal.protocol.AbstractQueryProtocol.readPacket(AbstractQueryProtocol.java:1337)
at org.mariadb.jdbc.internal.protocol.AbstractQueryProtocol.getResult(AbstractQueryProtocol.java:1318)
at org.mariadb.jdbc.internal.protocol.AbstractQueryProtocol.executeQuery(AbstractQueryProtocol.java:190)
at sun.reflect.GeneratedMethodAccessor47.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.mariadb.jdbc.internal.failover.AbstractMastersListener.invoke(AbstractMastersListener.java:379)
at org.mariadb.jdbc.internal.failover.FailoverProxy.executeInvocation(FailoverProxy.java:225)
... 14 more

I have not changed the validConnectionTimeout setting. When loading 10 files at once these errors happen right at 10 seconds.

Removing the :aurora: parameter and running with no failover/HA settings allows the files to load.