Home » Networking » Net_Sieve » Bug #8452

[2006-08-16 07:36 UTC] selsky at columbia dot edu

Description:
------------
Occasionally, my Sieve server (Cyrus 2.3 snapshot) freaks out
and doesn't actually return any data on the port after
completing the TCP handshake. This causes the _recvLn() to
return a continuous stream of ''. The while(true) loop
therefore never stops and Apache begins to consume 100% CPU.
There is a check in _recvLn() for $lastline === '', but it has
been commented out since it was added in CVS version 1.5
(http://cvs.php.net/viewvc.cgi/pear/Net_Sieve/Sieve.php?
annotate=1.10 near line 914)

Can that check be uncommented and the trailing ': ' of the
error messsage removed?

[2006-08-16 07:53 UTC] amistry at php dot net

This bug has been fixed in CVS.

If this was a documentation problem, the fix will appear on pear.php.net by the end of next Sunday (CET).

If this was a problem with the pear.php.net website, the change should be live shortly.

Otherwise, the fix will appear in the package's next release.

Thank you for the report and for helping us make PEAR better.

[2006-08-16 08:29 UTC] amistry at php dot net

Is there a sequence of commands that causes this "freak-out" with the Sieve server? If you can isolate that it would be helpful for writing a testcase for SieveTest.php. Thanks.

[2006-08-16 08:53 UTC] selsky at columbia dot edu

We connect to Sieve via an stunnel wrapper. I'm able to get
the error without issueing any Sieve commands at all. The
server freaks out before sending any output at all (and
before the client says anything. Try the following in a
loop:

echo 'logout' | openssl s_client -connect cyrushost:2001 -
quiet

(2001 is the stunnel wrapped port)

Occasionally, the s_client command exits like so:

read:errno=131

[2006-08-17 06:25 UTC] selsky at columbia dot edu

I was finally able to track this down. The problem occurs
when Cyrus dies on one of my murder front-end hosts, but
stunnel remains up. Net_Sieve connects successfully via SSL
to stunnel, but then stunnel forwards the connection to the
closed sieve port. The openssl s_client command returns
"read:errno=131" whereas Net_Sieve (before this fix) would
just loop forever.

[2006-08-17 16:16 UTC] amistry at php dot net

Well I'm not sure how to write a testcase for this situation. If you'd like you can have a stab at SieveTest.php. Either way we have it logged here in the bug tracker for future reference. Thanks.

[2006-12-22 20:54 UTC] amistry at php dot net

Thank you for your bug report. This issue has been fixed
in the latest released version of the package, which you can download at
http://pear.php.net/get/Net_Sieve