Cyrus SEEN and uidl patch

Sun Apr 1 05:25:57 EDT 2012

Good morning,

I'm running an ISP environment with Cyrus 2.3.18. I have seen, we have 
some problems when sync_client tries to do a SEEN from some mailboxes. 
First of all, say that we had to patch Cyrus IMAP with this proposed 
patch http://www.irbs.net/internet/info-cyrus/0602/0330.html because 
else... our customers who used Outlook (with any version!!!, even 
2010!!!) and pop3 mail retrieval protocol and the option of left message 
copy on the server, where constantly downloading the same messages one 
time and another (and always they checked for new mail in this MUA... 
and obviously you know... our customer's annoyance). After applying this 
patch, although the first problem has been corrected, (the Outlook and 
UIDL one...) I have observed (and reproduced) that sync_client's forked 
proccess gets stuck with some mailboxes when SEEN actions that had to 
move big strings like this one :

cyr_dbtool /expert/correo/imap/domain/e/egoitz.com/user/e/egoitz.seen 
skiplist show
04409b4d4f77894d	1 1333240179 13393 1333240678 
11,25,57,63,88,96:97,104,120,130,147,152,158:160,198,204,218,256,263,273,333,335,355,382:383,420,441,458,467,509,514,530,545,548,594,601,616,641,661,665:666,681,703,743,812,819,824,838,847,859,865,878,889,891,894,899,934,953,984,997,1002,1009,1024,1033,1068,1070,1123,1126,1165,1170,1175:1176,1179,1195,1197,1211,1221,1230,1261,1263,1275,1282,1299,1314,1334,1345,1364,1377,1417,1419,1421,1439,1443,1451,1454,1462,1476,1478,1515,1526,1529,1540,1564:1566,1573,1593,1608,1626,1628,1674,1697,1702,1713,1719,1736,1738,1748,1769,1775,1781,1830,1834,1842,1865,1870,1888,1910,1923,1930,1932,1935,1940,1973:1974,2005,2009,2011,2027,2044,2069,2079,2095,2101:2102,2119,2122,2134,2137,2141,2143,2154,2209,2223,2247,2267,2271,2287,2313,2331,2333:2334,2336,2338,2356,2370,2387,2431,2451,2478,2493,2517,2520,2550,2556,2572,2575,2594,2596,2600,2607,2658:2659,2708,2715,2732,2744,2766,2778,2817,2830,2885,2889,2904,2911,2917,2920,2930,2940,2955,2962,2970:2971,2985,3011,3031,3039:3040,3061,3091,3096,3147,31
 54,3164,
3171,3180,3183,3191:3192,3199,3219,3221,3225,3227,3230,3235,3254,3264,3273,3280,3304,3343,3361,3371,3375,3406,3414,3419,3425,3445,3463,3489,3492,3499,3525,3556,3564,3604,3636,3643,3665,3667,3670,3691:3692,3747,3797,3801,3803,3811,3852,3872,3883,3886,3907,3930,3993,4020,4036,4043,4105,4113,4142,4149,4159,4172,4187,4218,4220,4257,4309,4363,4365,4369,4371,4393:4394,4400,4434,4463,4481,4515,4551,4554,4581,4585,4591,4600,4641,4663,4710,4713,4721,4767,4792,4818,4872,4898,4928,4961,4977,4979:4981,4983,5009,5014,5037,5064,5076,5105,5156,5165,5177,5193,5208,5241,5261,5275,5281,5296,5298,5311,5313,5321,5328,5334,5343,5363,5392,5395,5401,5404,5408,5427,5440,5453,5466,5483,5520,5527,5537,5549,5597,5603,5608,5613,5652,5683,5688,5692,5719,5730,5747,5753,5764,5804,5845,5848,5860,5880,5883,5887,5910,5919:5920,5937,5950,5963,5974,5980,6014,6017,6032,6043,6052,6054,6070,6143,6180,6194,6273,6307,6342,6378,6384,6389,6407,6418,6421,6435,6443,6452,6480,6488,6534,6544,6556,6566,6576,6588,6603,6616,
 6691,673
3,6736,6749,6772,6820,6844,6860,6864,6878,6907,6913,6921,6932,6977,6988,6990,6996,7014,7030,7034,7042,7052,7084,7087,7095,7142,7151,7157,7162,7176:7177,7187,7194,7199,7215,7247,7275,7282,7331,7340:7341,7346,7349,7376,7383:7384,7403,7425,7479,7566,7571,7603,7611,7623,7648,7688:7689,7728,7758,7766,7795,7806,7815,7819,7851,7854,7863,7887,7915,7919,7929:7930,7932,7941,7981,7985,8147,8200,8257,8282,8287,8304,8309,8317,8321,8324,8326,8328,8330,8335,8359,8366:8367,8372,8432,8455,8460,8476,8499,8504,8513,8519,8531,8542,8567,8569,8575,8647,8660:8661,8669,8687:8688,8724,8750,8754,8773,8778,8792,8816,8834,8838,8876,8912,8927,8934,8937:8938,8969,8980:8981,9005,9008,9018,9029,9035:9036,9040,9044,9052,9066,9069,9076:9077,9084,9087:9088,9110,9131,9143,9152,9181,9191,9200,9207,9233,9255,9317,9340,9350,9359,9375,9402,9405,9412,9416:9417,9420:9421,9427,9433,9441,9445,9448,9451,9466,9473,9478,9505,9532,9569,9572,9598,9600,9609,9636,9645,9657,9671,9690,9702,9709,9711:9712,9714,9717,9729,9735,973
 7,9740:9
741,9750,9752,9755,9776,9782,9787,9799:9800,9817,9825,9833,9836,9889,9894:9895,9901,9903,9907:9908,9916,9919:9920,9923,9932,9938,9957,9972,10000,10027,10062,10065,10095,10109,10147,10159,10183,10186,10193,10239,10307,10347,10374,10423,10426,10434,10437,10479:10480,10495,10502,10513,10515,10523:10524,10538,10552,10566,10574,10595,10611,10615,10620,10624,10647:10648,10650,10660,10672,10674,10683:10684,10704,10715,10757:10758,10780,10784,10786,10788,10826,10830,10841,10863,10865,10868,10873,10884,10892,10905,10915,10927,10953:10954,10962,10975,11027,11042,11044,11053,11056,11061,11076,11103,11169,11196,11205,11218,11285,11295,11315,11317,11331,11333:11334,11338,11351,11354,11361,11377:11378,11381,11405,11407,11412,11414,11440,11452,11484,11486,11489,11493,11498,11541,11552,11562,11579,11601,11608,11610,11618,11657,11684,11688:11689,11697,11713,11717,11730,11739,11750,11754,11775,11788,11794,11840,11862,11864,11869,11871:11872,11901:11902,11922,11926,11954,11957,11967,11979,11991
 ,11994,1
1996,12007:12008,12014:12015,12019,12022,12030,12039,12046,12048:12049
17ee87c64f778f64	1 1333240441 20 1333240546 1:15,20
60fce00e4f778f59	1 1333240443 36 1333240403 1:31,33:35
6dd5e44d4f778f49	1 1333240233 71 1333240678 1:71

After doing some tests, and as said before, reproduced the problem... 
have noticed that sync_client is not being able to handle this big 
string with the function prot_printf as left in the proposed patch in 
the previous written URL 
(http://www.irbs.net/internet/info-cyrus/0602/0330.html). With other 
smaller strings has no problem with SEEN, but with this one, as said 
gets stuck there. So... like Outlook is a very used MUA (very known in 
fact....) and replication is essential IMHO to work smoothly.... I 
wanted to propose you this modified version of the patch I have attached 
to this mail. If you were so kind, I would be very thanked if you told 
me if you see some problem applying this to Cyrus-IMAPd 2.3.18 (you 
know... you would have to apply them with -p0 because have not take care 
with file locations.... sorry :) ). I have checked that when applying my 
modified version of the patch, the problem of SEEN mailboxes gets fixed 
and although have not tested directly the Outlook problem has to be 
corrected too... because of the own naure of the changes. If you see it 
ok?, wouldn't it be fine if you commit it to the official cvs of this 
nice server project?. I mean this is a very common problem that could 
happen, and the replication IMHO makes Cyrus (apart from other features 
of course) to be the better software of this kind.

So to summarize... do you see any problem with this patch?... and to be 
applied to now patched servers (with previous version of the patch of 
the proposed patch of the URL) ?. Could it be committed to cvs?

Thanks a lot for you're time,
Best regards
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