Chuck, I might owe you a lot of beers… Going to remove all the terminate() and
see what happens!
Thanks,
Matteo
On 21/mar/2013, at 19:19, Chuck Hill <ch...@global-village.net> wrote:
>
> On 2013-03-21, at 10:54 AM, Altera WO Team wrote:
>
>>
>> On 21/mar/2013, at 18:46, Chuck Hill <ch...@global-village.net> wrote:
>>
>>>
>>> On 2013-03-21, at 6:47 AM, Altera WO Team wrote:
>>>
>>>> I tried anyway and I can confirm. I'm not creating needless sessions.
>>>>
>>>> The app locks up anyway though…
>>>
>>> Did adding the finally blocks in your terminate() method help? Is anything
>>> in your code calling session.terminate() directly? A logout link?
>>
>> the finally blocks didn't help.
>>
>> Something is calling session.terminate() directly though, happens when a
>> something bad happens in a direct action.
>>
>> if (existingSession() != null)
>> sess().terminate();
>>
>> It's called only if we can't parse the parameters and should never happen.
>> I'll put some logging in those cases.
>>
>> Why should this be a problem?
>
> I thought it was fixed in 5.4.3, but I could be wrong. In some past version
> if that same URL can in in rapid succession, you would get deadlocks like you
> are seeing. The solution at the time was to not call terminate directly and
> instead set the session timeout to a couple seconds. That allowed both
> requests to clear before terminating the session.
>
>
> Chuck
>
>
>>>> I lost hope in finding the real reason, for now I would be happy to find a
>>>> dirty workaround. I need those apps to bounce anyway.
>>>>
>>>> I already tried using ERTimeToKill and it's ineffective.
>>>>
>>>> The lockups are quite rare: I have 10 instances running, bouncing every 6
>>>> hours and it happens maybe 2 times a week, but if an instance locks up the
>>>> instances running become 9 and in the long run I'll have everything locked
>>>> up.
>>>>
>>>> Any suggestions?
>>>
>>> I don't recall how ERTimeToKill works, but with those stuck threads you are
>>> going to need to do
>>>
>>> Runtime.getRuntime().exit(1);
>>>
>>> and if THAT does not kill it, this should:
>>>
>>> Runtime.getRuntime().halt(1);
>>>
>>>
>>> Chuck
>>>>
>>>> On 20/mar/2013, at 01:16, Chuck Hill <ch...@global-village.net> wrote:
>>>>
>>>>> I think the problem is not that it is creating needless sessions, but
>>>>> that a checked-out session is not getting checked back in.
>>>>>
>>>>> Chuck
>>>>>
>>>>>
>>>>> On 2013-03-19, at 5:08 PM, Simon wrote:
>>>>>
>>>>>> if we have this kind of issue the first thing we do is log out session
>>>>>> creation and check the stack traces. stick something like this in your
>>>>>> session constructor then check the output:
>>>>>>
>>>>>> public Session() {
>>>>>> super();
>>>>>> StringWriter stringWriter = new StringWriter();
>>>>>>
>>>>>> PrintWriter printWriter = new PrintWriter(stringWriter);
>>>>>>
>>>>>> (new Throwable()).printStackTrace(printWriter);
>>>>>>
>>>>>> String trace = stringWriter.toString(); <---- log this somewhere that
>>>>>> you can get easy access to
>>>>>>
>>>>>> }
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> On 19 March 2013 23:15, Altera WO Team <webobje...@altera.it> wrote:
>>>>>> Wow, good hint!
>>>>>>
>>>>>> In theory I'm not touching a Session but sometimes, when something in an
>>>>>> EO changes I trigger e-mail sending.
>>>>>> I use ERMailDeliveryHTML using a component instantiated with a brand new
>>>>>> wocontext using ERXWOContext.newContext()
>>>>>> the component is not referencing a Session in any part.
>>>>>>
>>>>>> Could it be the cause?
>>>>>>
>>>>>> Matteo
>>>>>>
>>>>>>
>>>>>> On 19/mar/2013, at 21:24, Simon <si...@potwells.co.uk> wrote:
>>>>>>
>>>>>>> ...or you are touching the session object outside the RR loop. the
>>>>>>> classic gotcha is rendering a component in a thread that touches the
>>>>>>> session in some way e.g. delivering an email in a thread that uses a
>>>>>>> component to render it's content... been caught by that one soooo many
>>>>>>> times!
>>>>>>>
>>>>>>>
>>>>>>> On 19 March 2013 17:51, Chuck Hill <ch...@global-village.net> wrote:
>>>>>>> Hi Matteo,
>>>>>>>
>>>>>>> You have one or more Zombie (aka Immortal) Sessions, as shown by stack
>>>>>>> traces like this:
>>>>>>> "WorkerThread11" prio=10 tid=0x0000000041848800 nid=0x1010 in
>>>>>>> Object.wait() [0x00007f16f7cfa000]
>>>>>>> java.lang.Thread.State: WAITING (on object monitor)
>>>>>>> at java.lang.Object.wait(Native Method)
>>>>>>> - waiting on <0x00000000d120b328> (a
>>>>>>> com.webobjects.appserver.WOSessionStore$TimeoutEntry)
>>>>>>> at java.lang.Object.wait(Object.java:485)
>>>>>>> at
>>>>>>> com.webobjects.appserver.WOSessionStore.checkOutSessionWithID(WOSessionStore.java:191)
>>>>>>> - locked <0x00000000d120b328> (a
>>>>>>> com.webobjects.appserver.WOSessionStore$TimeoutEntry)
>>>>>>> at
>>>>>>> com.webobjects.appserver.WOApplication.restoreSessionWithID(WOApplication.java:1913)
>>>>>>> at
>>>>>>> er.extensions.appserver.ERXApplication.restoreSessionWithID(ERXApplication.java:2403)
>>>>>>> at
>>>>>>> er.extensions.appserver.ERXWOContext.existingSession(ERXWOContext.java:57)
>>>>>>> at
>>>>>>> er.extensions.appserver.ERXWOContext.hasSession(ERXWOContext.java:69)
>>>>>>> at
>>>>>>> com.webobjects.appserver.WOAction.existingSession(WOAction.java:190)
>>>>>>> at com.tla.calendar.DirectAction.goToAction(DirectAction.java:454)
>>>>>>>
>>>>>>>
>>>>>>> This likely has one of two causes:
>>>>>>> 1. The application is getting OutOfMemory errors, which can leave the
>>>>>>> session store in an insane state
>>>>>>> 2. The app is throwing an exception from sleep() in Session. If you
>>>>>>> overrride sleep() it should use a try...finally block
>>>>>>>
>>>>>>> public void sleep() {
>>>>>>> try {
>>>>>>> // Your code here!
>>>>>>> } finally {
>>>>>>> super.sleep();
>>>>>>> }
>>>>>>> }
>>>>>>>
>>>>>>>
>>>>>>> Chuck
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> On 2013-03-19, at 9:38 AM, Altera WO Team wrote:
>>>>>>>
>>>>>>>> Hi all,
>>>>>>>>
>>>>>>>> I'm having a strange issue on a WO installation on EC2 (oracle jvm).
>>>>>>>> Same strange application which had immortal sessions…
>>>>>>>>
>>>>>>>> Sometimes (quite rarely) a bounced application (put in refuse new
>>>>>>>> sessions) never quits and it's not accessible from JavaMonitor.
>>>>>>>> If I look at the logs i see:
>>>>>>>>
>>>>>>>> Mar 19 12:38:52 B2C[2002] (ERXNSLogLog4jBridge.java:44) WARN NSLog -
>>>>>>>> <com.tla.calendar.Application>: refusing new clients and below min
>>>>>>>> active session threshold
>>>>>>>> Mar 19 12:38:52 B2C[2002] (ERXNSLogLog4jBridge.java:44) WARN NSLog -
>>>>>>>> <com.tla.calendar.Application>: about to terminate...
>>>>>>>>
>>>>>>>> The only thing left is to kill the instance… Which is not nice.
>>>>>>>>
>>>>>>>> I'm not overriding the terminate() method in Application.
>>>>>>>>
>>>>>>>> I am attaching a stack trace if it helps.
>>>>>>>> <B2Cjstack.txt>
>>>>>>>>
>>>>>>>> Thanks,
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> Matteo Centro
>>>>>>>> _______________________________________________
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>>>>>>>>
>>>>>>>> This email sent to ch...@global-village.net
>>>>>>>
>>>>>>> --
>>>>>>> Chuck Hill
>>>>>>> Executive Managing Partner, VP Development and Technical Services
>>>>>>>
>>>>>>> Practical WebObjects - for developers who want to increase their
>>>>>>> overall knowledge of WebObjects or who are trying to solve specific
>>>>>>> problems.
>>>>>>> http://www.global-village.net/gvc/practical_webobjects
>>>>>>>
>>>>>>> Global Village Consulting ranks 13th in 2012 in BIV's Top 100 Fastest
>>>>>>> Growing Companies in B.C!
>>>>>>> Global Village Consulting ranks 76th in 24th annual PROFIT 200 ranking
>>>>>>> of Canada’s Fastest-Growing Companies by PROFIT Magazine!
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> _______________________________________________
>>>>>>> Do not post admin requests to the list. They will be ignored.
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>>>>>>>
>>>>>>> This email sent to si...@potwells.co.uk
>>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>> --
>>>>> Chuck Hill
>>>>> Executive Managing Partner, VP Development and Technical Services
>>>>>
>>>>> Practical WebObjects - for developers who want to increase their overall
>>>>> knowledge of WebObjects or who are trying to solve specific problems.
>>>>> http://www.global-village.net/gvc/practical_webobjects
>>>>>
>>>>> Global Village Consulting ranks 13th in 2012 in BIV's Top 100 Fastest
>>>>> Growing Companies in B.C!
>>>>> Global Village Consulting ranks 76th in 24th annual PROFIT 200 ranking of
>>>>> Canada’s Fastest-Growing Companies by PROFIT Magazine!
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>
>>> --
>>> Chuck Hill
>>> Executive Managing Partner, VP Development and Technical Services
>>>
>>> Practical WebObjects - for developers who want to increase their overall
>>> knowledge of WebObjects or who are trying to solve specific problems.
>>> http://www.global-village.net/gvc/practical_webobjects
>>>
>>> Global Village Consulting ranks 13th in 2012 in BIV's Top 100 Fastest
>>> Growing Companies in B.C!
>>> Global Village Consulting ranks 76th in 24th annual PROFIT 200 ranking of
>>> Canada’s Fastest-Growing Companies by PROFIT Magazine!
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>
>
> --
> Chuck Hill
> Executive Managing Partner, VP Development and Technical Services
>
> Practical WebObjects - for developers who want to increase their overall
> knowledge of WebObjects or who are trying to solve specific problems.
> http://www.global-village.net/gvc/practical_webobjects
>
> Global Village Consulting ranks 13th in 2012 in BIV's Top 100 Fastest Growing
> Companies in B.C!
> Global Village Consulting ranks 76th in 24th annual PROFIT 200 ranking of
> Canada’s Fastest-Growing Companies by PROFIT Magazine!
>
>
>
>
>
>
>
>
>
>
>
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