[Quickfixj-users] a deadlock while doing the Session.isLoggedOn()

[Alexander G. <ago...@ac...>]

Hello,

My quickfix/j 1.0.5 application runs into a deadlock. I'm using the =
onLogout() callback to count the sessions that are still logged on. The =
method Session.disconnect() from where the onLogout() is called is =
synchronized by the Session instance. Inside the onLogout() I'm calling =
the sess=3DSession.lookupSession() followed by the sess.isLoggedOn() for =
every section that is returned by the SessionSettings.sectionIterator(). =
The problem arises when there are 2 concurrent onLogout() calls from 2 =
different Session instances. The session1 thread is calling =
session2_instance.isLoggedOn() while the session2 thread is calling =
session1_instance.isLoggedOn(). Since isLoggedOn() is also synchronized =
by the Session instance, and since both instances are already locked, =
both threads will be waiting for their locks forever. Can this be =
fixed/workarrounded?=20

Thank you,
Alexander Gorbachev.