Hi,
I've made some progress insofar as I managed to complete a build from
trunk with my changes, and got mail being delivered to the WinMailDir
(like it ;)) via FetchMail.
I'm running into a few probably Windows-centric issues now though.
(This is on Win7 Pro incidentally.)
First, I had to change the logon identity of the James service
definition to that of my Administrator user, as under the default
(LocalSystem), the maildir folders couldn't be created (I think this
was a perms issue but I don't know exactly why this worked tbh).
Now, it's impossible to move messages (e.g. from inbox to Trash) using
an IMAP client (Thunderbird, in this instance) as the message gets
copied to the destination but not deleted from the source. Here's
typical output:
<snip>
INFO 15:24:05,365 | james.imapserver | ID=3298599 Store failed for
mailbox #private:wib...@mydomain.co.uk:INBOX
org.apache.james.mailbox.exception.MailboxException: Failure while
save Message MaildirMessage 1 {S} Sun Aug 25 21:50:34 BST 2013 in
Mailbox #private:wib...@mydomain.co.uk:INBOX
at
org.apache.james.mailbox.maildir.mail.MaildirMessageMapper.updateFlags(MaildirMessageMapper.java:233)
at
org.apache.james.mailbox.store.StoreMessageManager$2.run(StoreMessageManager.java:536)
at
org.apache.james.mailbox.store.StoreMessageManager$2.run(StoreMessageManager.java:533)
at
org.apache.james.mailbox.store.transaction.TransactionalMapper.execute(TransactionalMapper.java:37)
at
org.apache.james.mailbox.store.StoreMessageManager.setFlags(StoreMessageManager.java:533)
at
org.apache.james.imap.processor.StoreProcessor.setFlags(StoreProcessor.java:245)
at
org.apache.james.imap.processor.StoreProcessor.doProcess(StoreProcessor.java:164)
at
org.apache.james.imap.processor.StoreProcessor.doProcess(StoreProcessor.java:57)
at
org.apache.james.imap.processor.AbstractMailboxProcessor.doProcess(AbstractMailboxProcessor.java:100)
at
org.apache.james.imap.processor.AbstractMailboxProcessor.process(AbstractMailboxProcessor.java:89)
at
org.apache.james.imap.processor.AbstractMailboxProcessor.doProcess(AbstractMailboxProcessor.java:83)
at
org.apache.james.imap.processor.AbstractMailboxProcessor.doProcess(AbstractMailboxProcessor.java:66)
at
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:52)
at
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:54)
at
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:54)
at
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:54)
at
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:54)
at
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:54)
at
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:54)
at
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:54)
at
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:54)
at
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:54)
at
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:54)
at
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:54)
at
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:54)
at
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:54)
at
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:54)
at
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:54)
at
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:54)
at
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:54)
at
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:54)
at
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:54)
at
org.apache.james.imap.processor.base.AbstractChainedProcessor.process(AbstractChainedProcessor.java:54)
at
org.apache.james.imapserver.netty.ImapChannelUpstreamHandler.messageReceived(ImapChannelUpstreamHandler.java:187)
at
org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:75)
at
org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:558)
at
org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:777)
at
org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:296)
at
org.jboss.netty.handler.codec.frame.FrameDecoder.unfoldAndFireMessageReceived(FrameDecoder.java:327)
at
org.jboss.netty.handler.codec.frame.FrameDecoder.callDecode(FrameDecoder.java:305)
at
org.jboss.netty.handler.codec.frame.FrameDecoder.messageReceived(FrameDecoder.java:207)
at
org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:75)
at
org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:558)
at
org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:777)
at
org.jboss.netty.handler.execution.ChannelUpstreamEventRunnable.run(ChannelUpstreamEventRunnable.java:44)
at
org.jboss.netty.handler.execution.OrderedMemoryAwareThreadPoolExecutor$ChildExecutor.run(OrderedMemoryAwareThreadPoolExecutor.java:312)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.io.IOException: Failed to delete original file
'..\var\store\maildir\mydomain.co.uk\wibble\cur\1377463834.cd32e9d983446360.MEBBE,S=2284;2,' after copy to
'..\var\store\maildir\mydomain.co.uk\wibble\cur\1377463834.cd32e9d983446360.MEBBE,S=2284;2,S'
at org.apache.commons.io.FileUtils.moveFile(FileUtils.java:2835)
at
org.apache.james.mailbox.maildir.mail.MaildirMessageMapper.updateFlags(MaildirMessageMapper.java:219)
... 48 more
</snip>
(I'm not sure how I get to see the "48 more", I've already turned up
everything to DEBUG and then to TRACE in log4j.properties.)
Based on some research, I guess that the problem here is that the
original file still has a lock on it when deletion is attempted. I've
had a look at the process handles on the message file using Process
Explorer (SysInternals tool), and accessing a message from the client
typically opens 2-5 handles on the given file, which are released over
a few seconds after accessing it (this is garbage-collection I
assume). However the pattern is similar when moving/deleting a
message (even after any previous handles have expired) so the issue
isn't escapable as easily as waiting 10sec between accessing and
moving/deleting a message (not that that would be practicable anyway).
So maybe what I need to do there is force GC (or find what is keeping
the handles/locks alive and make it release them) before doing the move?
Also, I'm curious why that operation is copy-then-delete, when other
move operations in maildir (e.g. from new -> cur when read, which
works fine) are presumably "normal" moves.
Another issue is that the server seems to report all messages as
Draft, but one thing at a time ;)
I should have known it wouldn't be so easy... Any thoughts or advice
on the above?
Robin Bankhead
Quoting Eric Charles <e...@apache.org>:
On 16/08/13 18:36, Robin Bankhead wrote:
Hi Eric,
Thanks for your reply.
Quoting Eric Charles <e...@apache.org>:
1. The support on windows has been asked and the answer has been that
the maildir de-facto norm does not support this.
Fair enough; if this document [1] is THE (de facto) spec, then its scope
is obviously narrow insofar as it's *nix-centric and I'm sure Windows
implementation was not considered by the author. Nevertheless, barring
this one technical incompatibility, I can't see anything else standing
against such implementation, can you?
If the rigidity of the "standard" is considered of such importance that
a deviant implementation isn't acceptable, then an alternative could be
to clone/extend it, implement the necessary character-switch, and call
the result something else (AwesomeDir, whatever) to avoid confusion ;)
WinMailDir?
2. Where is the [1] you are referring to? Btw I think we could make it
configurable to allow the mailbox-maildir to use a windows-friendly
character. Maybe that character has already been proposed somewhere
else? The default would of course be the standard norm.
Sorry about that, I cut but forgot to paste... That link was just to the
maildir subfolder in the svn repo; instead of that, here's a patch! Not
sure if it's the preferred format (and is against 0.4 version, not
trunk, as my test target initially will be the server 3.0beta4 release)
but should be apparent what it does at least. (Actually it does exactly
nothing functionally different, but replacing all hard-coded references
to the colon with a constant that's easier to flip.)
I've seen semicolon and (I think) comma suggested in the pages I came
across, but really it matters little as long as it's not a colon, other
NTFS/FAT reserved character, or character that could appear elsewhere in
the filename - which leaves us plenty of options. James can't be the
first project to have wrestled with this particular conundrum when
porting to Windows, so it might be the case that there already is a
favoured choice among those projects, but I'd need to investigate further.
Certainly there would have to be a different default for Windows because
the global default simply doesn't work there, but many users wouldn't
care what character was used instead, so that decision ought not to be
forced on them.
Next I'll look into implementing an OS-detecting switch for this and an
optional preference to specify the character used. I realise this
remains very hypothetical for actual submission, but does that sound
like the best approach?
Rather than os-detecting system, the failing character could be
defined by configuration, default being the standard one.
Thanks,
Robin Bankhead
[1] http://cr.yp.to/proto/maildir.html
On 14/08/13 16:11, Robin Bankhead wrote:
Hi,
I've been looking at James as a replacement for our legacy Windows-
based
email setup, at which point my hopes of a maildir-based message store
were dashed (because of a filesystem reserved character (colon) in the
spec).
Moving to maildir appealed to me because the legacy software uses mbox
but the local spool is now up to nearly 2GB and the risk of corruption
is starting to bother me (well, that and the next Windows update could
render that abandonware unusable). I daresay it would improve
performance somewhat as well.
I've had a look at the source, and from what I can see, the edits
required to use an alternative character (eg semicolon) in message file
naming only amount to a couple of lines, or a bit more to make it a
configurable option.
I'm ready to try building and testing a patch myself, but before I fling
myself into that I felt it sensible to ask:
1. Has this been proposed before, and if so, are there technical reasons
why it was decided against? (No sense in going over old ground)
2. Should I be looking further afield in the source than the specific
Maildir code, i.e. the contents of [1], for potential conflicts? (I
guess in theory the answer should be "no", but y'all know the codebase
better than I!)
Any advice would be very welcome.
Regards,
Robin Bankhead
---------------------------------------------------------------------
To unsubscribe, e-mail: server-user-unsubscr...@james.apache.org
For additional commands, e-mail: server-user-h...@james.apache.org
---------------------------------------------------------------------
To unsubscribe, e-mail: server-user-unsubscr...@james.apache.org
For additional commands, e-mail: server-user-h...@james.apache.org
---------------------------------------------------------------------
To unsubscribe, e-mail: server-user-unsubscr...@james.apache.org
For additional commands, e-mail: server-user-h...@james.apache.org
---------------------------------------------------------------------
To unsubscribe, e-mail: server-user-unsubscr...@james.apache.org
For additional commands, e-mail: server-user-h...@james.apache.org
---------------------------------------------------------------------
To unsubscribe, e-mail: server-user-unsubscr...@james.apache.org
For additional commands, e-mail: server-user-h...@james.apache.org
