У меня несколько сложная установка, которая не работает, и я изо всех сил пытаюсь отследить первопричину.
Прежде всего, общая картина:
Серверная часть узла - это рабочая роль Windows Azure среднего размера, на которой запущен JBoss 5. Она выполняет потоковую передачу данных JSON, состоящих из нескольких частей или фрагментов.
Внешний интерфейс узла - это рабочая роль Azure Azure среднего размера, на которой запущен JBoss 5. Он запрашивает составные / фрагментированные данные JSON HTTP от внутреннего узла, а затем снова публикует их через http.
Эти потоки довольно просты и могут быть протестированы с помощью браузера или wget.
Мы наблюдаем, что потоки просто перестают работать через некоторое время (от часов до дней). Чтобы отследить это, я запустил wget на стороне внешнего интерфейса (т. Е. На стороне клиента) и wirehark, чтобы посмотреть, что происходит. Wireshark настроен на выгрузку файлов в кольцевой буфер. Скорость потока составляет примерно 100 КБ / с, поэтому производительность не должна быть проблемой. Что я наблюдаю: окно приема wget начинается с 130000, а затем уменьшается до 517 байт. В конечном итоге он достигает 0, а затем wget находится там довольно долго (иногда несколько секунд, иногда до 100 секунд), пока он снова не примет данные. См. Этот wirehark:
No. Time Source Destination Protocol Info 138300 17:33:47.038970 10.211.148.222 94.245.90.204 TCP 52902 > 5284 [ACK] Seq=1 Ack=12610206 Win=27 Len=0 138301 17:33:47.069346 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12610206 Ack=1 Win=514 Len=118 138302 17:33:47.069353 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12610324 Ack=1 Win=514 Len=119 138303 17:33:47.069358 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12610443 Ack=1 Win=514 Len=118 138304 17:33:47.069362 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12610561 Ack=1 Win=514 Len=109 138305 17:33:47.069366 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12610670 Ack=1 Win=514 Len=126 138306 17:33:47.069370 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12610796 Ack=1 Win=514 Len=115 138307 17:33:47.069374 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12610911 Ack=1 Win=514 Len=119 138308 17:33:47.069378 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12611030 Ack=1 Win=514 Len=116 138309 17:33:47.069382 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12611146 Ack=1 Win=514 Len=115 138310 17:33:47.069386 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12611261 Ack=1 Win=514 Len=116 138311 17:33:47.069390 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12611377 Ack=1 Win=514 Len=115 138312 17:33:47.069499 10.211.148.222 94.245.90.204 TCP 52902 > 5284 [ACK] Seq=1 Ack=12611492 Win=22 Len=0 138313 17:33:47.069569 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12611492 Ack=1 Win=514 Len=132 138314 17:33:47.069573 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12611624 Ack=1 Win=514 Len=121 138315 17:33:47.069577 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12611745 Ack=1 Win=514 Len=103 138316 17:33:47.069581 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12611848 Ack=1 Win=514 Len=107 138317 17:33:47.069585 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12611955 Ack=1 Win=514 Len=118 138318 17:33:47.069589 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12612073 Ack=1 Win=514 Len=118 138319 17:33:47.069593 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12612191 Ack=1 Win=514 Len=117 138320 17:33:47.069597 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12612308 Ack=1 Win=514 Len=126 138321 17:33:47.069601 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12612434 Ack=1 Win=514 Len=108 138322 17:33:47.069605 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12612542 Ack=1 Win=514 Len=112 138323 17:33:47.069609 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12612654 Ack=1 Win=514 Len=109 138324 17:33:47.069613 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12612763 Ack=1 Win=514 Len=107 138325 17:33:47.069617 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12612870 Ack=1 Win=514 Len=104 138326 17:33:47.069621 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12612974 Ack=1 Win=514 Len=115 138327 17:33:47.069625 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12613089 Ack=1 Win=514 Len=107 138328 17:33:47.069629 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12613196 Ack=1 Win=514 Len=107 138329 17:33:47.069633 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12613303 Ack=1 Win=514 Len=123 138330 17:33:47.069638 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12613426 Ack=1 Win=514 Len=105 138331 17:33:47.069641 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12613531 Ack=1 Win=514 Len=129 138332 17:33:47.069712 10.211.148.222 94.245.90.204 TCP 52902 > 5284 [ACK] Seq=1 Ack=12613660 Win=14 Len=0 138333 17:33:47.069756 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12613660 Ack=1 Win=514 Len=111 138334 17:33:47.069761 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12613771 Ack=1 Win=514 Len=114 138335 17:33:47.069765 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12613885 Ack=1 Win=514 Len=127 138336 17:33:47.069769 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12614012 Ack=1 Win=514 Len=109 138337 17:33:47.069773 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12614121 Ack=1 Win=514 Len=107 138338 17:33:47.069777 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12614228 Ack=1 Win=514 Len=106 138339 17:33:47.069781 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12614334 Ack=1 Win=514 Len=120 138340 17:33:47.069785 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12614454 Ack=1 Win=514 Len=110 138341 17:33:47.069789 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12614564 Ack=1 Win=514 Len=114 138342 17:33:47.069793 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12614678 Ack=1 Win=514 Len=107 138343 17:33:47.069797 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12614785 Ack=1 Win=514 Len=109 138344 17:33:47.069801 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12614894 Ack=1 Win=514 Len=119 138345 17:33:47.069805 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12615013 Ack=1 Win=514 Len=113 138346 17:33:47.069809 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12615126 Ack=1 Win=514 Len=116 138347 17:33:47.069813 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12615242 Ack=1 Win=514 Len=120 138348 17:33:47.069817 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12615362 Ack=1 Win=514 Len=114 138349 17:33:47.069870 10.211.148.222 94.245.90.204 TCP 52902 > 5284 [ACK] Seq=1 Ack=12615476 Win=7 Len=0 138350 17:33:47.069908 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12615476 Ack=1 Win=514 Len=108 138351 17:33:47.069912 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12615584 Ack=1 Win=514 Len=107 138352 17:33:47.069916 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12615691 Ack=1 Win=514 Len=107 138353 17:33:47.069919 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12615798 Ack=1 Win=514 Len=115 138354 17:33:47.069923 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12615913 Ack=1 Win=514 Len=120 138355 17:33:47.069927 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12616033 Ack=1 Win=514 Len=107 138356 17:33:47.069931 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12616140 Ack=1 Win=514 Len=119 138357 17:33:47.069935 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12616259 Ack=1 Win=514 Len=122 138358 17:33:47.069939 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12616381 Ack=1 Win=514 Len=105 138359 17:33:47.069943 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12616486 Ack=1 Win=514 Len=113 138360 17:33:47.069947 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12616599 Ack=1 Win=514 Len=107 138361 17:33:47.069950 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12616706 Ack=1 Win=514 Len=114 138362 17:33:47.069954 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12616820 Ack=1 Win=514 Len=127 138363 17:33:47.069959 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12616947 Ack=1 Win=514 Len=132 138364 17:33:47.070004 10.211.148.222 94.245.90.204 TCP [TCP ZeroWindow] 52902 > 5284 [ACK] Seq=1 Ack=12617079 Win=0 Len=0 138365 17:33:47.390902 94.245.90.204 10.211.148.222 TCP [TCP ZeroWindowProbe] 5284 > 52902 [ACK] Seq=12617079 Ack=1 Win=514 Len=1 138366 17:33:47.599283 10.211.148.222 94.245.90.204 TCP [TCP ZeroWindow] [TCP ACKed lost segment] 52902 > 5284 [ACK] Seq=1 Ack=12617080 Win=0 Len=0 138367 17:33:48.203458 94.245.90.204 10.211.148.222 TCP [TCP ZeroWindowProbe] 5284 > 52902 [ACK] Seq=12617080 Ack=1 Win=514 Len=1 138368 17:33:48.411799 10.211.148.222 94.245.90.204 TCP [TCP ZeroWindow] [TCP ACKed lost segment] 52902 > 5284 [ACK] Seq=1 Ack=12617081 Win=0 Len=0 139055 17:33:50.015857 94.245.90.204 10.211.148.222 TCP [TCP ZeroWindowProbe] 5284 > 52902 [ACK] Seq=12617081 Ack=1 Win=514 Len=1 139056 17:33:50.224262 10.211.148.222 94.245.90.204 TCP [TCP ZeroWindow] [TCP ACKed lost segment] 52902 > 5284 [ACK] Seq=1 Ack=12617082 Win=0 Len=0 141485 17:33:54.234768 94.245.90.204 10.211.148.222 TCP [TCP ZeroWindowProbe] 5284 > 52902 [ACK] Seq=12617082 Ack=1 Win=514 Len=1 141972 17:33:54.442993 10.211.148.222 94.245.90.204 TCP [TCP ZeroWindow] [TCP ACKed lost segment] 52902 > 5284 [ACK] Seq=1 Ack=12617083 Win=0 Len=0 146212 17:34:03.422127 94.245.90.204 10.211.148.222 TCP [TCP ZeroWindowProbe] 5284 > 52902 [ACK] Seq=12617083 Ack=1 Win=514 Len=1 146214 17:34:03.630469 10.211.148.222 94.245.90.204 TCP [TCP ZeroWindow] [TCP ACKed lost segment] 52902 > 5284 [ACK] Seq=1 Ack=12617084 Win=0 Len=0 153400 17:34:22.203389 94.245.90.204 10.211.148.222 TCP [TCP ZeroWindowProbe] 5284 > 52902 [ACK] Seq=12617084 Ack=1 Win=514 Len=1 153967 17:34:22.411696 10.211.148.222 94.245.90.204 TCP [TCP ZeroWindow] [TCP ACKed lost segment] 52902 > 5284 [ACK] Seq=1 Ack=12617085 Win=0 Len=0 156977 17:34:59.547273 94.245.90.204 10.211.148.222 TCP [TCP ZeroWindowProbe] 5284 > 52902 [ACK] Seq=12617085 Ack=1 Win=514 Len=1 156978 17:34:59.755506 10.211.148.222 94.245.90.204 TCP [TCP ZeroWindow] [TCP ACKed lost segment] 52902 > 5284 [ACK] Seq=1 Ack=12617086 Win=0 Len=0 156983 17:35:49.424340 10.211.148.222 94.245.90.204 TCP [TCP Window Update] 52902 > 5284 [ACK] Seq=1 Ack=12617086 Win=517 Len=0 156984 17:35:49.427810 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12617086 Ack=1 Win=514 Len=1440 156985 17:35:49.427893 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12618526 Ack=1 Win=514 Len=1440 156986 17:35:49.427934 10.211.148.222 94.245.90.204 TCP 52902 > 5284 [ACK] Seq=1 Ack=12619966 Win=506 Len=0 156987 17:35:49.427960 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12619966 Ack=1 Win=514 Len=1440 156988 17:35:49.427991 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=12621406 Ack=1 Win=514 Len=1440
Я не понимаю, почему wget так долго занят. Также я вижу подобное поведение с нашим клиентом JBoss / java. «Обычно» поток выглядит так:
No. Time Source Destination Protocol Info
46 17:31:04.858278 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=1 Ack=1 Win=514 Len=108
50 17:31:04.858306 10.211.148.222 94.245.90.204 TCP 52902 > 5284 [ACK] Seq=1 Ack=109 Win=516 Len=0
61 17:31:04.858528 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=109 Ack=1 Win=514 Len=95
166 17:31:04.861793 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=204 Ack=1 Win=514 Len=107
167 17:31:04.861813 10.211.148.222 94.245.90.204 TCP 52902 > 5284 [ACK] Seq=1 Ack=311 Win=515 Len=0
320 17:31:04.869327 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=311 Ack=1 Win=514 Len=102
326 17:31:04.869393 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=413 Ack=1 Win=514 Len=117
327 17:31:04.869408 10.211.148.222 94.245.90.204 TCP 52902 > 5284 [ACK] Seq=1 Ack=530 Win=515 Len=0
328 17:31:04.869419 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=530 Ack=1 Win=514 Len=96
329 17:31:04.870048 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=626 Ack=1 Win=514 Len=113
330 17:31:04.870069 10.211.148.222 94.245.90.204 TCP 52902 > 5284 [ACK] Seq=1 Ack=739 Win=514 Len=0
337 17:31:04.870431 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=739 Ack=1 Win=514 Len=107
383 17:31:04.871195 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=846 Ack=1 Win=514 Len=116
388 17:31:04.871222 10.211.148.222 94.245.90.204 TCP 52902 > 5284 [ACK] Seq=1 Ack=962 Win=513 Len=0
423 17:31:04.872362 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=962 Ack=1 Win=514 Len=99
440 17:31:04.873151 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=1061 Ack=1 Win=514 Len=100
446 17:31:04.873182 10.211.148.222 94.245.90.204 TCP 52902 > 5284 [ACK] Seq=1 Ack=1161 Win=512 Len=0
508 17:31:04.875097 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=1161 Ack=1 Win=514 Len=98
599 17:31:04.877254 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=1259 Ack=1 Win=514 Len=104
604 17:31:04.877307 10.211.148.222 94.245.90.204 TCP 52902 > 5284 [ACK] Seq=1 Ack=1363 Win=517 Len=0
639 17:31:04.878517 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=1363 Ack=1 Win=514 Len=115
657 17:31:04.878662 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=1478 Ack=1 Win=514 Len=104
660 17:31:04.878693 10.211.148.222 94.245.90.204 TCP 52902 > 5284 [ACK] Seq=1 Ack=1582 Win=516 Len=0
683 17:31:04.879737 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=1582 Ack=1 Win=514 Len=106
716 17:31:04.880392 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=1688 Ack=1 Win=514 Len=100
720 17:31:04.880448 10.211.148.222 94.245.90.204 TCP 52902 > 5284 [ACK] Seq=1 Ack=1788 Win=515 Len=0
767 17:31:04.882359 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=1788 Ack=1 Win=514 Len=104
841 17:31:04.883507 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=1892 Ack=1 Win=514 Len=108
843 17:31:04.883527 10.211.148.222 94.245.90.204 TCP 52902 > 5284 [ACK] Seq=1 Ack=2000 Win=515 Len=0
851 17:31:04.884238 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=2000 Ack=1 Win=514 Len=101
896 17:31:04.885225 94.245.90.204 10.211.148.222 TCP 5284 > 52902 [PSH, ACK] Seq=2101 Ack=1 Win=514 Len=116
904 17:31:04.885276 10.211.148.222 94.245.90.204 TCP 52902 > 5284 [ACK] Seq=1 Ack=2217 Win=514 Len=0
Также я действительно не понимаю, почему размер окна всего 517 байт. Любая идея? Пакеты данных настолько малы (100-200 байтов) из-за используемого текущего протокола уровня 7.
Изменить: передача данных не удалась после 6 ГБ или 8 ГБ. кажется, нет 32-битной штуки. Ссылка / оборудование неизвестно, но предполагается, что оно находится в одном центре обработки данных microsoft azure. Вот настройка подключения wget (удалите несколько бит для минимальной конфиденциальности):
No. Time Source Destination Protocol Info
157007 17:50:49.590140 10.211.148.222 94.245.90.204 TCP 58291 > 5284 [SYN] Seq=0 Win=8192 Len=0 MSS=1460 WS=8
Frame 157007 (66 bytes on wire, 66 bytes captured)
Arrival Time: Apr 16, 2012 17:50:49.590140000
Frame Number: 157007
Frame Length: 66 bytes
Capture Length: 66 bytes
Ethernet II, Src: 00:15:5d:36:03:6d (00:15:5d:36:03:6d), Dst: 02:f5:0a:d3:ff:0a (02:f5:0a:d3:ff:0a)
Destination: 02:f5:0a:d3:ff:0a (02:f5:0a:d3:ff:0a)
Address: 02:f5:0a:d3:ff:0a (02:f5:0a:d3:ff:0a)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
.... ..1. .... .... .... .... = LG bit: Locally administered address (this is NOT the factory default)
Source: 00:15:5d:36:03:6d (00:15:5d:36:03:6d)
Address: 00:15:5d:36:03:6d (00:15:5d:36:03:6d)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
.... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
Type: IP (0x0800)
Internet Protocol, Src: 10.211.148.222 (10.211.148.222), Dst: 94.245.90.204 (94.245.90.204)
Version: 4
Header length: 20 bytes
Differentiated Services Field: 0x00 (DSCP 0x00: Default; ECN: 0x00)
0000 00.. = Differentiated Services Codepoint: Default (0x00)
.... ..0. = ECN-Capable Transport (ECT): 0
.... ...0 = ECN-CE: 0
Total Length: 52
Identification: 0x17ac (6060)
Flags: 0x02 (Don't Fragment)
0.. = Reserved bit: Not Set
.1. = Don't fragment: Set
..0 = More fragments: Not Set
Fragment offset: 0
Time to live: 128
Protocol: TCP (0x06)
Source: 10.211.148.222 (10.211.148.222)
Destination: 94.245.90.204 (94.245.90.204)
Transmission Control Protocol, Src Port: 58291 (58291), Dst Port: 5284 (5284), Seq: 0, Len: 0
Source port: 58291 (58291)
Destination port: 5284 (5284)
Sequence number: 0 (relative sequence number)
Header length: 32 bytes
Flags: 0x02 (SYN)
0... .... = Congestion Window Reduced (CWR): Not set
.0.. .... = ECN-Echo: Not set
..0. .... = Urgent: Not set
...0 .... = Acknowledgement: Not set
.... 0... = Push: Not set
.... .0.. = Reset: Not set
.... ..1. = Syn: Set
[Expert Info (Chat/Sequence): Connection establish request (SYN): server port 5284]
[Message: Connection establish request (SYN): server port 5284]
[Severity level: Chat]
[Group: Sequence]
.... ...0 = Fin: Not set
Window size: 8192
Options: (12 bytes)
Maximum segment size: 1460 bytes
NOP
Window scale: 8 (multiply by 256)
NOP
NOP
SACK permitted
No. Time Source Destination Protocol Info
157008 17:50:49.591169 94.245.90.204 10.211.148.222 TCP 5284 > 58291 [SYN, ACK] Seq=0 Ack=1 Win=8192 Len=0 MSS=1440 WS=8
Frame 157008 (66 bytes on wire, 66 bytes captured)
Arrival Time: Apr 16, 2012 17:50:49.591169000
Frame Number: 157008
Frame Length: 66 bytes
Capture Length: 66 bytes
Ethernet II, Src: 02:f5:0a:d3:ff:0a (02:f5:0a:d3:ff:0a), Dst: 00:15:5d:36:03:6d (00:15:5d:36:03:6d)
Destination: 00:15:5d:36:03:6d (00:15:5d:36:03:6d)
Address: 00:15:5d:36:03:6d (00:15:5d:36:03:6d)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
.... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
Source: 02:f5:0a:d3:ff:0a (02:f5:0a:d3:ff:0a)
Address: 02:f5:0a:d3:ff:0a (02:f5:0a:d3:ff:0a)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
.... ..1. .... .... .... .... = LG bit: Locally administered address (this is NOT the factory default)
Type: IP (0x0800)
Internet Protocol, Src: 94.245.90.204 (94.245.90.204), Dst: 10.211.148.222 (10.211.148.222)
Version: 4
Header length: 20 bytes
Differentiated Services Field: 0x00 (DSCP 0x00: Default; ECN: 0x00)
0000 00.. = Differentiated Services Codepoint: Default (0x00)
.... ..0. = ECN-Capable Transport (ECT): 0
.... ...0 = ECN-CE: 0
Total Length: 52
Identification: 0x6cbb (27835)
Flags: 0x02 (Don't Fragment)
0.. = Reserved bit: Not Set
.1. = Don't fragment: Set
..0 = More fragments: Not Set
Fragment offset: 0
Time to live: 127
Protocol: TCP (0x06)
Source: 94.245.90.204 (94.245.90.204)
Destination: 10.211.148.222 (10.211.148.222)
Transmission Control Protocol, Src Port: 5284 (5284), Dst Port: 58291 (58291), Seq: 0, Ack: 1, Len: 0
Source port: 5284 (5284)
Destination port: 58291 (58291)
Sequence number: 0 (relative sequence number)
Acknowledgement number: 1 (relative ack number)
Header length: 32 bytes
Flags: 0x12 (SYN, ACK)
0... .... = Congestion Window Reduced (CWR): Not set
.0.. .... = ECN-Echo: Not set
..0. .... = Urgent: Not set
...1 .... = Acknowledgement: Set
.... 0... = Push: Not set
.... .0.. = Reset: Not set
.... ..1. = Syn: Set
[Expert Info (Chat/Sequence): Connection establish acknowledge (SYN+ACK): server port 5284]
[Message: Connection establish acknowledge (SYN+ACK): server port 5284]
[Severity level: Chat]
[Group: Sequence]
.... ...0 = Fin: Not set
Window size: 8192
Options: (12 bytes)
Maximum segment size: 1440 bytes
NOP
Window scale: 8 (multiply by 256)
NOP
NOP
SACK permitted
[SEQ/ACK analysis]
[This is an ACK to the segment in frame: 157007]
[The RTT to ACK the segment was: 0.001029000 seconds]
No. Time Source Destination Protocol Info
157009 17:50:49.591242 10.211.148.222 94.245.90.204 TCP 58291 > 5284 [ACK] Seq=1 Ack=1 Win=132352 Len=0
Frame 157009 (54 bytes on wire, 54 bytes captured)
Arrival Time: Apr 16, 2012 17:50:49.591242000
Frame Number: 157009
Frame Length: 54 bytes
Capture Length: 54 bytes
Ethernet II, Src: 00:15:5d:36:03:6d (00:15:5d:36:03:6d), Dst: 02:f5:0a:d3:ff:0a (02:f5:0a:d3:ff:0a)
Destination: 02:f5:0a:d3:ff:0a (02:f5:0a:d3:ff:0a)
Address: 02:f5:0a:d3:ff:0a (02:f5:0a:d3:ff:0a)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
.... ..1. .... .... .... .... = LG bit: Locally administered address (this is NOT the factory default)
Source: 00:15:5d:36:03:6d (00:15:5d:36:03:6d)
Address: 00:15:5d:36:03:6d (00:15:5d:36:03:6d)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
.... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
Type: IP (0x0800)
Internet Protocol, Src: 10.211.148.222 (10.211.148.222), Dst: 94.245.90.204 (94.245.90.204)
Version: 4
Header length: 20 bytes
Differentiated Services Field: 0x00 (DSCP 0x00: Default; ECN: 0x00)
0000 00.. = Differentiated Services Codepoint: Default (0x00)
.... ..0. = ECN-Capable Transport (ECT): 0
.... ...0 = ECN-CE: 0
Total Length: 40
Identification: 0x17ad (6061)
Flags: 0x02 (Don't Fragment)
0.. = Reserved bit: Not Set
.1. = Don't fragment: Set
..0 = More fragments: Not Set
Fragment offset: 0
Time to live: 128
Protocol: TCP (0x06)
Source: 10.211.148.222 (10.211.148.222)
Destination: 94.245.90.204 (94.245.90.204)
Transmission Control Protocol, Src Port: 58291 (58291), Dst Port: 5284 (5284), Seq: 1, Ack: 1, Len: 0
Source port: 58291 (58291)
Destination port: 5284 (5284)
[Stream index: 2]
Sequence number: 1 (relative sequence number)
Acknowledgement number: 1 (relative ack number)
Header length: 20 bytes
Flags: 0x10 (ACK)
0... .... = Congestion Window Reduced (CWR): Not set
.0.. .... = ECN-Echo: Not set
..0. .... = Urgent: Not set
...1 .... = Acknowledgement: Set
.... 0... = Push: Not set
.... .0.. = Reset: Not set
.... ..0. = Syn: Not set
.... ...0 = Fin: Not set
Window size: 132352 (scaled)
[SEQ/ACK analysis]
[This is an ACK to the segment in frame: 157008]
[The RTT to ACK the segment was: 0.000073000 seconds]
No. Time Source Destination Protocol Info
157010 17:50:49.591565 10.211.148.222 94.245.90.204 TCP 58291 > 5284 [PSH, ACK] Seq=1 Ack=1 Win=132352 Len=389
Frame 157010 (443 bytes on wire, 443 bytes captured)
Arrival Time: Apr 16, 2012 17:50:49.591565000
Frame Number: 157010
Frame Length: 443 bytes
Capture Length: 443 bytes
Ethernet II, Src: 00:15:5d:36:03:6d (00:15:5d:36:03:6d), Dst: 02:f5:0a:d3:ff:0a (02:f5:0a:d3:ff:0a)
Destination: 02:f5:0a:d3:ff:0a (02:f5:0a:d3:ff:0a)
Address: 02:f5:0a:d3:ff:0a (02:f5:0a:d3:ff:0a)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
.... ..1. .... .... .... .... = LG bit: Locally administered address (this is NOT the factory default)
Source: 00:15:5d:36:03:6d (00:15:5d:36:03:6d)
Address: 00:15:5d:36:03:6d (00:15:5d:36:03:6d)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
.... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
Type: IP (0x0800)
Internet Protocol, Src: 10.211.148.222 (10.211.148.222), Dst: 94.245.90.204 (94.245.90.204)
Version: 4
Header length: 20 bytes
Differentiated Services Field: 0x00 (DSCP 0x00: Default; ECN: 0x00)
0000 00.. = Differentiated Services Codepoint: Default (0x00)
.... ..0. = ECN-Capable Transport (ECT): 0
.... ...0 = ECN-CE: 0
Total Length: 429
Identification: 0x17ae (6062)
Flags: 0x02 (Don't Fragment)
0.. = Reserved bit: Not Set
.1. = Don't fragment: Set
..0 = More fragments: Not Set
Fragment offset: 0
Time to live: 128
Protocol: TCP (0x06)
Source: 10.211.148.222 (10.211.148.222)
Destination: 94.245.90.204 (94.245.90.204)
Transmission Control Protocol, Src Port: 58291 (58291), Dst Port: 5284 (5284), Seq: 1, Ack: 1, Len: 389
Source port: 58291 (58291)
Destination port: 5284 (5284)
Sequence number: 1 (relative sequence number)
[Next sequence number: 390 (relative sequence number)]
Acknowledgement number: 1 (relative ack number)
Header length: 20 bytes
Flags: 0x18 (PSH, ACK)
0... .... = Congestion Window Reduced (CWR): Not set
.0.. .... = ECN-Echo: Not set
..0. .... = Urgent: Not set
...1 .... = Acknowledgement: Set
.... 1... = Push: Set
.... .0.. = Reset: Not set
.... ..0. = Syn: Not set
.... ...0 = Fin: Not set
Window size: 132352 (scaled)
[SEQ/ACK analysis]
[Number of bytes in flight: 389]
Data (389 bytes)
0000 47 45 54 20 2f 69 6e 74 65 72 66 61 63 65 73 2f GET /interfaces/
...
0100 54 54 50 2f 31 2e 30 0d 0a 52 61 6e 67 65 3a 20 TTP/1.0..Range:
0110 62 79 74 65 73 3d 37 35 35 37 30 32 33 35 39 36 bytes=7557023596
0120 2d 0d 0a 55 73 65 72 2d 41 67 65 6e 74 3a 20 57 -..User-Agent: W
0130 67 65 74 2f 31 2e 31 31 2e 34 0d 0a 41 63 63 65 get/1.11.4..Acce
0140 70 74 3a 20 2a 2f 2a 0d 0a 48 6f 73 74 3a 20 73 pt: */*.
0170 63 74 69 6f 6e 3a 20 4b 65 65 70 2d 41 6c 69 76 ction: Keep-Aliv
0180 65 0d 0a 0d 0a e....
Изменить: фиксированный заголовок
Нулевой размер окна означает, что ОС получила все данные, которые она могла в своем приемном буфере для этого соединения, и ожидает, пока приложение их прочитает (). Другими словами, если вы не читаете данные, которые отправляет вам сервер, так же быстро, как он их отправляет, в какой-то момент он заблокируется вот так. Как вы используете wget, можете ли вы вставить точный сценарий / команду? То же самое и с вашей java-программой, уверены ли вы, что она читает все данные с сервера и никогда не выполняет резервное копирование, или пропускает событие / уведомление о том, что данные готовы, или имеет проблему, когда она не успевает за чтением ( ) с?
Также проверьте netstat -anp и посмотрите на Recv-Q столбец для этого соединения, если он не 0, то данные сохраняются в буфере, ожидая, пока ваше приложение их прочитает. Изменить: argh, Windows, эта ссылка может помочь.
Извините за задержку обновления, ребята. Короче говоря, причиной всего этого был сломанный NAT в облаке Microsoft Azure. RFC 5382 игнорируется. Их тайм-аут TCP-соединения составляет 60 секунд. Когда истекает этот тайм-аут, соединение не закрывается активно (RST или около того, как предлагается в RFC) или просто игнорируется. Вместо этого происходит очень странная трансляция, из-за которой пакеты прибывают с исходными / целевыми IP-адресами garbeld на правильную виртуальную машину. VM выбрасывает их, но из-за этого было довольно сложно определить их в wirehark. Он будет рассматривать их как совершенно другую связь.
Поводом для решения было сердцебиение на уровне приложений 60-х годов.