OK, I'll raise a JIRA when I get back to work in the morning and have the details. (Our hours are a bit different to most of you guys'.)
John Hurst > -----Original Message----- > From: Rob Davies [mailto:[EMAIL PROTECTED] > Sent: Thursday, 10 November 2005 19:59 > To: [email protected] > Subject: Re: [servicemix-user] Deadlock with bounded queue > > Hi John, > > please raise a jira issue - then we can all track progress on this etc. > I'll have a look at this asap. > > cheers, > > Rob > On 9 Nov 2005, at 23:56, HURST, John B wrote: > > > > > Hi, > > > > A couple of times I've experienced deadlocks with ServiceMix due to > bounded queues becoming full. The most recent case was today, using ST > flow. It's easy to see how ST flow might be susceptible to this, but I > believe I've had it with SEDA also. (Perhaps with a different > queue/cause.) > > > > In the case today I diagnosed it by examining the stack traces of > threads using JMX (jconsole) after ServiceMix had hung. I found that seven > threads are BLOCKED on synchronized (putGuard_) in > BoundedLinkedQueue#put(), while one thread is stuck inside the method > waiting for reconcilePutPermits() to return true. > > > > My test case involves a FTPPoller receiving 1,100 files, passing > them through to a XLST routing component, which passes them on to an > HTTPInvoker component. (Actually both the FTPPoller and HTTPInvoker are > local customizations and I'm using a couple of customized marshallers > too.) I realise 1,100 files is quite a lot to receive at once via FTP. > However, I increased the default capacity of BoundedLinkedQueue (from > 1,024 to 10,240, as an experiment) and things seemed to work OK. I don't > really expect to have 1,100 files at once in real life, but in our > scenario we will receive a couple hundred at once sometimes, so I thought > this was a good test. > > > > Should I raise a JIRA for this, or am I doing something stupid? > > > > I have saved the stack traces. > > > > BTW I'm using ServiceMix 2.0, built from source. > > > > John Hurst > > Wellington, New Zealand > > > > > ____________________________________________________________________ > __ > This email has been scanned by the MessageLabs Email Security > System. > For more information please visit http://www.messagelabs.com/email > ____________________________________________________________________ > __ > >
