Hi Ashish,
I am the user who has many OOM with the trunk and feed Norman with my
issues :)
1.
Indeed, you have the dump with CircularQueue from mina 2.0.0-RC1. This
is the release we normally use in james and give the issue after a
certain period of time. I mean, the server can stay working correctly 2
days or crash after 2 hours (see
http://apache.u-mangate.com/james/oom/oom.png) due to a peak in memory
usage. T
To further investigate, we tried with mina trunk 2.0.0-RC2-SNAPSHOT :
There, we see a direct crash. I've uploaded such a dump on
http://apache.u-mangate.com/james/oom/index.html (click on shift-f5 to
force refresh, I setup the web server in a hurry). You will see there
recursive ConcurrentLinkedQueue.
2.
As shown on http://apache.u-mangate.com/james/oom/oom.png, the system
works while the line is flat (mail are received, spooled,
delivered,...). On a few seconds, it peaks and of course, nothing works
anymore. So, the messages don't remain in the spool. I made tests with
quite huge messages, and they are delivered very fast as soon as they
arrive in James.
Don't hesitate to ask more questions or propose additional tests.
Many tks in advance,
Eric
On 04/09/2010 12:40 PM, Ashish wrote:
Norman,
Couple of more queries
1. The heap dump uses circularqueue class, so seem to be taken for an
earlier trunk snapshot. Is my take correct?
2. What's the state of the System? are the clients receiving the
messages. The queue seems to be holding a very large number of
objects.
Essentially what I want to know is, if the clients are receiving the
messages or the Server is holding them up.
Will spend more time with the issue and see what I can figure out.
thanks
ashish
On Thu, Apr 8, 2010 at 2:03 PM, Norman Maurer
<norman.mau...@googlemail.com> wrote:
Maybe Eric can do, cause he is the one who see it very freqently..
So Eric...;) ?
Thx,
Norman
2010/4/8 Ashish<paliwalash...@gmail.com>:
Can you provide the heapdump for this OOM?
thanks
ashish
On Thu, Apr 8, 2010 at 1:40 PM, Ashish<paliwalash...@gmail.com> wrote:
On Thu, Apr 8, 2010 at 1:28 PM, Norman Maurer
<norman.mau...@googlemail.com> wrote:
Hi Ashish,
I think we tracked down the source of the problem a bit more.. The OOM
seems to be related to IMAP. Our IMAP server component is using the
StreamIoHandler (its the only one of our components who use this
handler). So I suspect there is the problem.
So there are two possible problems:
1) Bug in StreamIoHandler
2) Wrong usage of StreamIoHandler. Our implementations is here:
http://svn.apache.org/viewvc/james/server/trunk/imapserver/src/main/java/org/apache/james/imapserver/mina/ImapIoHandler.java?view=markup
Thx,
Norman
Sorry, haven't been able to look at this so far :(
earliest I can give it a shot will be on Sunday.
thanks
ashish
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