ConcurrentModificationException when stopping the Initiator

[kurudj]

Describe the bug
When attempting to stop an initiator by calling a initiator_.stop(); we get a ConcurrentModificationException that based on the stack trace is happening on the inside of the library.

Caused by: java.util.ConcurrentModificationException
	at java.base/java.util.HashMap$HashIterator.remove(HashMap.java:1507)
	at quickfix.mina.initiator.AbstractSocketInitiator.stopInitiators(AbstractSocketInitiator.java:320)
	at quickfix.SocketInitiator.stop(SocketInitiator.java:142)
	at quickfix.Connector.stop(Connector.java:45)

To Reproduce

It would be hard to reproduce since this callback is a part of a quite large codebase. The callback is made from a QuickFIXClient.java class from a close() method that attempts to close the connection.

Expected behavior

No exceptions.

system information:

• OS: Linux
• Java version: jdk-13
• QFJ Version: 2.2.1

Additional context

[chrjohn]

Hi @kurudj ,

this has already been fixed in #324 as part of QFJ 2.3.0. Could you please try again with that version?

Thanks and cheers,
Chris.