Re: Hang in WOMailDelivery.sendEmail
Re: Hang in WOMailDelivery.sendEmail
- Subject: Re: Hang in WOMailDelivery.sendEmail
- From: Allen Cronce <email@hidden>
- Date: Wed, 21 Sep 2005 16:12:16 -0700
Thanks for getting back to me Chuck. But is it safe to call
WOMailDelivery.sendEmail from another thread? I've found that more often
than not, WO calls out of the main thread or request/response loop lead
to "ahem", undefined behavior.
Best,
--
Allen Cronce
Chuck Hill wrote:
> The first thing I would do is to use java.util.Timer and a separate
> thread. That way, at least the app won't hang if the mail thread
> stalls out waiting for a server response.
>
> Chuck
>
>
> On Sep 21, 2005, at 10:54 AM, Allen Cronce wrote:
>
>> Hi all,
>>
>> We're trying to debug a hang that happens sporadically when sending
>> e-mails. Currently we send e-mails using WOMailDelivery.sendEmail
>> from a
>> WOTimer in our application instance. This centralizes all e-mail sends
>> for the application. In the future we'd like to use Project Wonder
>> ERJavaMail framework, but we can't do that short term.
>>
>> The really weird thing is that the stack trace indicates that the
>> underlying socket code is waiting forever for data back from the e- mail
>> server. I would have expected instead to see some sort of threading
>> deadlock, but that doesn't seem to be the case. We control both the
>> e-mail server and the application server but we can see no obvious
>> problem in any of our logs.
>>
>> Here's the stack trace (note that I've edited out most of the worker
>> threads since they're all the same):
>>
>> --snip--
>> WorkerThread0:
>> [1] java.net.PlainSocketImpl.accept (PlainSocketImpl.java:351)
>> [2] java.net.ServerSocket.implAccept (ServerSocket.java:448)
>> [3] java.net.ServerSocket.accept (ServerSocket.java:419)
>> [4] com.webobjects.appserver._private.WOWorkerThread.run
>> (WOWorkerThread.java:238)
>> [5] java.lang.Thread.run (Thread.java:552)
>> Thread-0:
>> [1] java.lang.Thread.sleep (native method)
>> [2] com.webobjects.appserver.WOApplication$_LifebeatThread.run
>> (WOApplication.java:1,233)
>> Session Timeout Thread:
>> Current thread isn't suspended.
>> Signal Dispatcher:
>> Finalizer:
>> [1] java.lang.Object.wait (native method)
>> [2] java.lang.ref.ReferenceQueue.remove (ReferenceQueue.java:111)
>> [3] java.lang.ref.ReferenceQueue.remove (ReferenceQueue.java:127)
>> [4] java.lang.ref.Finalizer$FinalizerThread.run (Finalizer.java:159)
>> Reference Handler:
>> [1] java.lang.Object.wait (native method)
>> [2] java.lang.Object.wait (Object.java:429)
>> [3] java.lang.ref.Reference$ReferenceHandler.run (Reference.java: 115)
>> main:
>> [1] java.net.SocketInputStream.socketRead0 (native method)
>> [2] java.net.SocketInputStream.read (SocketInputStream.java:129)
>> [3] java.io.BufferedInputStream.fill (BufferedInputStream.java:183)
>> [4] java.io.BufferedInputStream.read (BufferedInputStream.java:201)
>> [5] sun.net.TransferProtocolClient.readServerResponse
>> (TransferProtocolClient.java:49)
>> [6] sun.net.smtp.SmtpClient.issueCommand (SmtpClient.java:46)
>> [7] sun.net.smtp.SmtpClient.openServer (SmtpClient.java:112)
>> [8] sun.net.smtp.SmtpClient.<init> (SmtpClient.java:135)
>> [9] com.webobjects.appserver.WOMailDelivery.sendEmail
>> (WOMailDelivery.java:201)
>> [10] com.paceap.ilok.Application.timer (Application.java:832)
>> [11] sun.reflect.GeneratedMethodAccessor12.invoke (null)
>> [12] sun.reflect.DelegatingMethodAccessorImpl.invoke
>> (DelegatingMethodAccessorImpl.java:25)
>> [13] java.lang.reflect.Method.invoke (Method.java:324)
>> [14] com.webobjects.foundation.NSSelector.invoke (NSSelector.java:
>> 354)
>> [15] com.webobjects.foundation.NSSelector.invoke (NSSelector.java:
>> 381)
>> [16] com.webobjects.appserver.WOTimer.fire (WOTimer.java:190)
>> [17] com.webobjects.appserver._WORunLoop._nextTimerInterval
>> (_WORunLoop.java:179)
>> [18] com.webobjects.appserver._WORunLoop._limitDate
>> (_WORunLoop.java:84)
>> [19] com.webobjects.appserver._WORunLoop.runBeforeDate
>> (_WORunLoop.java:63)
>> [20] com.webobjects.appserver.WOApplication._runOnce
>> (WOApplication.java:775)
>> [21] com.webobjects.appserver.WOApplication.run
>> (WOApplication.java:900)
>> [22] com.webobjects.appserver.WOApplication.main
>> (WOApplication.java:324)
>> [23] com.paceap.ilok.Application.main (Application.java:106)
>> [24] sun.reflect.NativeMethodAccessorImpl.invoke0 (native method)
>> [25] sun.reflect.NativeMethodAccessorImpl.invoke
>> (NativeMethodAccessorImpl.java:39)
>> [26] sun.reflect.DelegatingMethodAccessorImpl.invoke
>> (DelegatingMethodAccessorImpl.java:25)
>> [27] java.lang.reflect.Method.invoke (Method.java:324)
>> [28] com.webobjects._bootstrap.WOBootstrap.main (WOBootstrap.java: 71)
>>
>> --snip--
>>
>> Any ideas as to how to resolve this would be much appreciated.
>>
>> Best regards,
>> --
>> Allen Cronce
>> _______________________________________________
>> Do not post admin requests to the list. They will be ignored.
>> Webobjects-dev mailing list (email@hidden)
>> Help/Unsubscribe/Update your Subscription:
>> 40global-village.net
>>
>> This email sent to email@hidden
>>
>
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Webobjects-dev mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden