When starting an initiator via 'initiator.start()' the default section of the provided SessionSettings are overwitten in the method 'SessionSettings.getSessionProperties(SessionID, boolean) in line 175. This results in a corrupted session settings configuration. I.e. in case the default section defines a custom data dictionary 'default_dict', the first session section defines some other data dictionary 'dict1' and a second session section defines no data dictionary then the session properties for the second session will contain the 'dict1' data dictionary instead of the 'default_dict' data dictionary. This scenario can be reproduced with the following JUnit test:

package test;

import java.io.IOException;
import java.io.InputStream;
import java.io.StringBufferInputStream;
import java.util.Properties;

import org.junit.Test;

import quickfix.Application;
import quickfix.ApplicationAdapter;
import quickfix.ConfigError;
import quickfix.LogFactory;
import quickfix.MemoryStoreFactory;
import quickfix.MessageStoreFactory;
import quickfix.ScreenLogFactory;
import quickfix.SessionID;
import quickfix.SessionSettings;
import quickfix.ThreadedSocketAcceptor;
import quickfix.ThreadedSocketInitiator;
import quickfix.fix42.MessageFactory;

public class FIXSessionSettingsModificationTest {
@Test
public void testGetSessionProperties() throws ConfigError

}