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I have every day some lines (5-10) of "Read queue under heavy load" in my logs without any problems.

Yesterday i had a lot of these lines and after a while smartfox had an unknown problem and didnt accept new connections.

What is this message, how can i find more information about this? Can i do anything to know more about it?

INFO | jvm 1 | 2010/10/07 15:38:50 | 15:38:49.967 - [ WARNING ] > Read queue under heavy load (115 msgs)
INFO | jvm 1 | 2010/10/07 15:38:50 | 15:38:49.968 - [ WARNING ] > Read queue under heavy load (103 msgs)
INFO | jvm 1 | 2010/10/07 15:38:50 | 15:38:50.051 - [ WARNING ] > Read queue under heavy load (140 msgs)
INFO | jvm 1 | 2010/10/07 15:40:16 | 15:40:16.746 - [ WARNING ] > Connection was closed during login phase.
INFO | jvm 1 | 2010/10/07 15:50:06 | 15:50:05.977 - [ WARNING ] > Read queue under heavy load (131 msgs)
INFO | jvm 1 | 2010/10/07 15:50:06 | 15:50:06.042 - [ WARNING ] > Read queue under heavy load (111 msgs)
INFO | jvm 1 | 2010/10/07 15:50:06 | 15:50:06.049 - [ WARNING ] > Read queue under heavy load (115 msgs)
INFO | jvm 1 | 2010/10/07 15:50:06 | 15:50:06.050 - [ WARNING ] > Read queue under heavy load (113 msgs)
INFO | jvm 1 | 2010/10/07 15:50:06 | 15:50:06.074 - [ WARNING ] > Read queue under heavy load (141 msgs)
INFO | jvm 1 | 2010/10/07 15:50:06 | 15:50:06.094 - [ WARNING ] > Read queue under heavy load (112 msgs)
INFO | jvm 1 | 2010/10/07 15:50:06 | 15:50:06.286 - [ WARNING ] > Read queue under heavy load (163 msgs)
INFO | jvm 1 | 2010/10/07 15:50:15 | 15:50:15.644 - [ WARNING ] > Read queue under heavy load (117 msgs)
INFO | jvm 1 | 2010/10/07 15:50:16 | 15:50:16.171 - [ WARNING ] > Read queue under heavy load (152 msgs)
INFO | jvm 1 | 2010/10/07 15:50:16 | 15:50:16.187 - [ WARNING ] > Read queue under heavy load (157 msgs)
INFO | jvm 1 | 2010/10/07 15:50:16 | 15:50:16.358 - [ WARNING ] > Read queue under heavy load (108 msgs)
INFO | jvm 1 | 2010/10/07 15:50:17 | 15:50:17.646 - [ WARNING ] > Connection was closed during login phase.
INFO | jvm 1 | 2010/10/07 15:50:25 | 15:50:25.714 - [ WARNING ] > Read queue under heavy load (115 msgs)
INFO | jvm 1 | 2010/10/07 15:50:36 | 15:50:36.016 - [ WARNING ] > Read queue under heavy load (112 msgs)
INFO | jvm 1 | 2010/10/07 15:50:36 | 15:50:36.442 - [ WARNING ] > Read queue under heavy load (107 msgs)
INFO | jvm 1 | 2010/10/07 15:50:36 | 15:50:36.916 - [ WARNING ] > Read queue under heavy load (152 msgs)
INFO | jvm 1 | 2010/10/07 15:50:37 | 15:50:37.069 - [ WARNING ] > Read queue under heavy load (103 msgs)
INFO | jvm 1 | 2010/10/07 15:50:37 | 15:50:37.475 - [ WARNING ] > Read queue under heavy load (107 msgs)
INFO | jvm 1 | 2010/10/07 15:50:38 | 15:50:38.442 - [ WARNING ] > Connection was closed during login phase.
INFO | jvm 1 | 2010/10/07 15:55:13 | 15:55:13.466 - [ WARNING ] > Read queue under heavy load (112 msgs)
INFO | jvm 1 | 2010/10/07 15:55:13 | 15:55:13.538 - [ WARNING ] > Read queue under heavy load (125 msgs)
INFO | jvm 1 | 2010/10/07 15:55:13 | 15:55:13.545 - [ WARNING ] > Read queue under heavy load (104 msgs)
INFO | jvm 1 | 2010/10/07 15:55:13 | 15:55:13.547 - [ WARNING ] > Read queue under heavy load (120 msgs)
INFO | jvm 1 | 2010/10/07 15:55:23 | 15:55:23.690 - [ WARNING ] > Read queue under heavy load (145 msgs)
INFO | jvm 1 | 2010/10/07 15:55:23 | 15:55:23.737 - [ WARNING ] > Read queue under heavy load (130 msgs)
INFO | jvm 1 | 2010/10/07 15:55:23 | 15:55:23.857 - [ WARNING ] > Read queue under heavy load (319 msgs)
INFO | jvm 1 | 2010/10/07 15:55:24 | 15:55:24.211 - [ WARNING ] > Read queue under heavy load (248 msgs)
INFO | jvm 1 | 2010/10/07 15:55:24 | 15:55:24.498 - [ WARNING ] > Read queue under heavy load (122 msgs)
INFO | jvm 1 | 2010/10/07 15:55:24 | 15:55:24.573 - [ WARNING ] > Read queue under heavy load (198 msgs)
INFO | jvm 1 | 2010/10/07 15:55:24 | 15:55:24.597 - [ WARNING ] > Read queue under heavy load (196 msgs)
INFO | jvm 1 | 2010/10/07 15:55:33 | 15:55:33.664 - [ WARNING ] > Read queue under heavy load (221 msgs)
INFO | jvm 1 | 2010/10/07 15:55:33 | 15:55:33.755 - [ WARNING ] > Read queue under heavy load (125 msgs)
INFO | jvm 1 | 2010/10/07 15:55:34 | 15:55:34.543 - [ WARNING ] > Read queue under heavy load (119 msgs)
INFO | jvm 1 | 2010/10/07 15:55:34 | 15:55:34.546 - [ WARNING ] > Read queue under heavy load (143 msgs)
INFO | jvm 1 | 2010/10/07 15:55:43 | 15:55:43.427 - [ WARNING ] > Read queue under heavy load (192 msgs)
INFO | jvm 1 | 2010/10/07 15:55:43 | 15:55:43.431 - [ WARNING ] > Read queue under heavy load (144 msgs)
INFO | jvm 1 | 2010/10/07 15:55:43 | 15:55:43.509 - [ WARNING ] > Read queue under heavy load (191 msgs)
INFO | jvm 1 | 2010/10/07 15:55:43 | 15:55:43.705 - [ WARNING ] > Read queue under heavy load (403 msgs)
INFO | jvm 1 | 2010/10/07 15:55:53 | 15:55:53.164 - [ WARNING ] > Read queue under heavy load (463 msgs)
INFO | jvm 1 | 2010/10/07 15:55:53 | 15:55:53.168 - [ WARNING ] > Read queue under heavy load (194 msgs)
INFO | jvm 1 | 2010/10/07 15:55:53 | 15:55:53.176 - [ WARNING ] > Read queue under heavy load (435 msgs)
INFO | jvm 1 | 2010/10/07 15:55:53 | 15:55:53.181 - [ WARNING ] > Read queue under heavy load (174 msgs)
INFO | jvm 1 | 2010/10/07 15:55:53 | 15:55:53.182 - [ WARNING ] > Read queue under heavy load (176 msgs)
INFO | jvm 1 | 2010/10/07 15:55:53 | 15:55:53.419 - [ WARNING ] > Read queue under heavy load (382 msgs)
INFO | jvm 1 | 2010/10/07 15:56:03 | 15:56:02.908 - [ WARNING ] > Read queue under heavy load (284 msgs)

See http://forums.smartfoxserver.com/viewtopic.php?t=5101