#1841: mozilla slaves failing in 'git'
-------------------+----------------------
Reporter:  dustin  |       Owner:
    Type:  defect  |      Status:  new
Priority:  major   |   Milestone:  ongoing
 Version:  master  |  Resolution:
Keywords:          |
-------------------+----------------------

Comment (by dustin):

 tcpdump of a brief 'fetch' from my server:
 {{{
 22:24:31.979057 IP adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781 >
 github.com.git: S 846634609:846634609(0) win 5840 <mss
 1460,sackOK,timestamp 2770775669 0,nop,wscale 7>
 22:24:32.045390 IP github.com.git >
 adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781: S
 2231992162:2231992162(0) ack 846634610 win 5792 <mss 1452,sackOK,timestamp
 1433003840 2770775669,nop,wscale 7>
 22:24:32.045418 IP adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781 >
 github.com.git: . ack 1 win 46 <nop,nop,timestamp 2770775686 1433003840>
 22:24:32.045443 IP adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781 >
 github.com.git: P 1:60(59) ack 1 win 46 <nop,nop,timestamp 2770775686
 1433003840>
 22:24:32.112380 IP github.com.git >
 adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781: . ack 60 win 46
 <nop,nop,timestamp 1433003857 2770775686>
 22:24:32.124351 IP github.com.git >
 adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781: P 1:156(155) ack 60 win
 46 <nop,nop,timestamp 1433003860 2770775686>
 22:24:32.124375 IP adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781 >
 github.com.git: . ack 156 win 54 <nop,nop,timestamp 2770775705 1433003860>
 22:24:32.132625 IP github.com.git >
 adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781: . 156:1596(1440) ack 60
 win 46 <nop,nop,timestamp 1433003861 2770775686>
 22:24:32.132650 IP adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781 >
 github.com.git: . ack 1596 win 77 <nop,nop,timestamp 2770775708
 1433003861>
 22:24:32.193696 IP github.com.git >
 adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781: . 1596:3036(1440) ack 60
 win 46 <nop,nop,timestamp 1433003876 2770775705>
 22:24:32.193720 IP adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781 >
 github.com.git: . ack 3036 win 100 <nop,nop,timestamp 2770775723
 1433003876>
 22:24:32.197731 IP github.com.git >
 adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781: P 3036:4476(1440) ack 60
 win 46 <nop,nop,timestamp 1433003876 2770775705>
 22:24:32.197754 IP adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781 >
 github.com.git: . ack 4476 win 122 <nop,nop,timestamp 2770775724
 1433003876>
 22:24:32.203731 IP github.com.git >
 adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781: . 4476:5916(1440) ack 60
 win 46 <nop,nop,timestamp 1433003878 2770775708>
 22:24:32.203755 IP adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781 >
 github.com.git: . ack 5916 win 145 <nop,nop,timestamp 2770775725
 1433003878>
 22:24:32.205677 IP github.com.git >
 adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781: P 5916:6852(936) ack 60
 win 46 <nop,nop,timestamp 1433003878 2770775708>
 22:24:32.205700 IP adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781 >
 github.com.git: . ack 6852 win 167 <nop,nop,timestamp 2770775726
 1433003878>
 22:24:32.222389 IP adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781 >
 github.com.git: P 60:579(519) ack 6852 win 167 <nop,nop,timestamp
 2770775730 1433003878>
 22:24:32.247370 IP adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781 >
 github.com.git: . 579:2019(1440) ack 6852 win 167 <nop,nop,timestamp
 2770775736 1433003878>
 22:24:32.337099 IP github.com.git >
 adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781: . ack 2019 win 77
 <nop,nop,timestamp 1433003913 2770775730>
 22:24:32.337126 IP adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781 >
 github.com.git: P 2019:2892(873) ack 6852 win 167 <nop,nop,timestamp
 2770775759 1433003913>
 22:24:32.347111 IP github.com.git >
 adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781: P 6852:7300(448) ack
 2019 win 77 <nop,nop,timestamp 1433003915 2770775730>
 22:24:32.347227 IP github.com.git >
 adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781: P 7300:7748(448) ack
 2019 win 77 <nop,nop,timestamp 1433003915 2770775730>
 22:24:32.347242 IP adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781 >
 github.com.git: . ack 7748 win 212 <nop,nop,timestamp 2770775761
 1433003915>
 22:24:32.349057 IP github.com.git >
 adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781: P 7748:8196(448) ack
 2019 win 77 <nop,nop,timestamp 1433003915 2770775730>
 22:24:32.351125 IP github.com.git >
 adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781: P 8196:8364(168) ack
 2019 win 77 <nop,nop,timestamp 1433003915 2770775730>
 22:24:32.351126 IP github.com.git >
 adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781: P 8364:8420(56) ack 2019
 win 77 <nop,nop,timestamp 1433003915 2770775730>
 22:24:32.351154 IP adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781 >
 github.com.git: . ack 8420 win 257 <nop,nop,timestamp 2770775762
 1433003915>
 22:24:32.422252 IP github.com.git >
 adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781: P 8420:9485(1065) ack
 2892 win 99 <nop,nop,timestamp 1433003934 2770775759>
 22:24:32.460445 IP adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781 >
 github.com.git: . ack 9485 win 280 <nop,nop,timestamp 2770775790
 1433003934>
 22:24:32.492844 IP github.com.git >
 adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781: P 9485:9520(35) ack 2892
 win 99 <nop,nop,timestamp 1433003952 2770775762>
 22:24:32.492869 IP adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781 >
 github.com.git: . ack 9520 win 280 <nop,nop,timestamp 2770775798
 1433003952>
 22:24:32.508862 IP github.com.git >
 adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781: P 9520:9678(158) ack
 2892 win 99 <nop,nop,timestamp 1433003956 2770775762>
 22:24:32.508886 IP adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781 >
 github.com.git: . ack 9678 win 302 <nop,nop,timestamp 2770775802
 1433003956>
 22:24:32.522870 IP github.com.git >
 adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781: . 9678:11118(1440) ack
 2892 win 99 <nop,nop,timestamp 1433003959 2770775762>
 22:24:32.522895 IP adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781 >
 github.com.git: . ack 11118 win 325 <nop,nop,timestamp 2770775805
 1433003959>
 22:24:32.528808 IP github.com.git >
 adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781: . 11118:12558(1440) ack
 2892 win 99 <nop,nop,timestamp 1433003959 2770775762>
 22:24:32.528828 IP adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781 >
 github.com.git: . ack 12558 win 348 <nop,nop,timestamp 2770775806
 1433003959>
 22:24:32.532700 IP github.com.git >
 adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781: . 12558:13998(1440) ack
 2892 win 99 <nop,nop,timestamp 1433003959 2770775762>
 22:24:32.532719 IP adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781 >
 github.com.git: . ack 13998 win 370 <nop,nop,timestamp 2770775807
 1433003959>
 22:24:32.536653 IP github.com.git >
 adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781: . 13998:15438(1440) ack
 2892 win 99 <nop,nop,timestamp 1433003959 2770775762>
 22:24:32.536680 IP adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781 >
 github.com.git: . ack 15438 win 393 <nop,nop,timestamp 2770775809
 1433003959>
 22:24:32.542674 IP github.com.git >
 adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781: . 15438:16878(1440) ack
 2892 win 99 <nop,nop,timestamp 1433003959 2770775762>
 22:24:32.542698 IP adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781 >
 github.com.git: . ack 16878 win 416 <nop,nop,timestamp 2770775810
 1433003959>
 22:24:32.546545 IP github.com.git >
 adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781: P 16878:18318(1440) ack
 2892 win 99 <nop,nop,timestamp 1433003960 2770775790>
 22:24:32.546571 IP adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781 >
 github.com.git: . ack 18318 win 438 <nop,nop,timestamp 2770775811
 1433003960>
 22:24:32.550415 IP github.com.git >
 adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781: . 18318:19758(1440) ack
 2892 win 99 <nop,nop,timestamp 1433003960 2770775790>
 22:24:32.550440 IP adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781 >
 github.com.git: . ack 19758 win 461 <nop,nop,timestamp 2770775812
 1433003960>
 22:24:32.562232 IP github.com.git >
 adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781: . 19758:21198(1440) ack
 2892 win 99 <nop,nop,timestamp 1433003968 2770775798>
 22:24:32.562257 IP adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781 >
 github.com.git: . ack 21198 win 483 <nop,nop,timestamp 2770775815
 1433003968>
 22:24:32.566205 IP github.com.git >
 adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781: . 21198:22638(1440) ack
 2892 win 99 <nop,nop,timestamp 1433003968 2770775798>
 22:24:32.566229 IP adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781 >
 github.com.git: . ack 22638 win 501 <nop,nop,timestamp 2770775816
 1433003968>
 22:24:32.576261 IP github.com.git >
 adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781: . 22638:24078(1440) ack
 2892 win 99 <nop,nop,timestamp 1433003972 2770775802>
 22:24:32.579988 IP github.com.git >
 adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781: . 24078:25518(1440) ack
 2892 win 99 <nop,nop,timestamp 1433003972 2770775802>
 22:24:32.580012 IP adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781 >
 github.com.git: . ack 25518 win 501 <nop,nop,timestamp 2770775819
 1433003972>
 22:24:32.593956 IP github.com.git >
 adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781: . 25518:26958(1440) ack
 2892 win 99 <nop,nop,timestamp 1433003976 2770775805>
 22:24:32.597723 IP github.com.git >
 adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781: . 26958:28398(1440) ack
 2892 win 99 <nop,nop,timestamp 1433003976 2770775805>
 22:24:32.597747 IP adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781 >
 github.com.git: . ack 28398 win 501 <nop,nop,timestamp 2770775824
 1433003976>
 22:24:32.601820 IP github.com.git >
 adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781: . 28398:29838(1440) ack
 2892 win 99 <nop,nop,timestamp 1433003978 2770775806>
 22:24:32.605731 IP github.com.git >
 adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781: . 29838:31278(1440) ack
 2892 win 99 <nop,nop,timestamp 1433003978 2770775806>
 22:24:32.605753 IP adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781 >
 github.com.git: . ack 31278 win 501 <nop,nop,timestamp 2770775826
 1433003978>
 22:24:32.611711 IP github.com.git >
 adsl-99-89-149-21.dsl.chcgil.sbcglobal.net.33781: P 31278:32718(1440) ack
 2892 win 99 <nop,nop,timestamp 1433003979 2770775807>
 }}}

 and the same from a cm-bbot-linux-001:
 {{{
 20:17:40.628403 IP cm-bbot-linux-001.sj.mozilla.com.60831 >
 github.com.git: S 3512995651:3512995651(0) win 5840 <mss
 1460,sackOK,timestamp 681688542 0,nop,wscale 6>
 20:17:40.699016 IP github.com.git > cm-bbot-
 linux-001.sj.mozilla.com.60831: S 1747304768:1747304768(0) ack 3512995652
 win 5792 <mss 1460,sackOK,timestamp 3417924511 681688542,nop,w
 scale 7>
 20:17:40.699041 IP cm-bbot-linux-001.sj.mozilla.com.60831 >
 github.com.git: . ack 1 win 92 <nop,nop,timestamp 681688560 3417924511>
 20:17:40.699094 IP cm-bbot-linux-001.sj.mozilla.com.60831 >
 github.com.git: P 1:60(59) ack 1 win 92 <nop,nop,timestamp 681688560
 3417924511>
 20:17:40.770063 IP github.com.git > cm-bbot-
 linux-001.sj.mozilla.com.60831: . ack 60 win 46 <nop,nop,timestamp
 3417924529 681688560>
 20:17:40.781458 IP github.com.git > cm-bbot-
 linux-001.sj.mozilla.com.60831: P 1:156(155) ack 60 win 46
 <nop,nop,timestamp 3417924532 681688560>
 20:17:40.781466 IP github.com.git > cm-bbot-
 linux-001.sj.mozilla.com.60831: P 156:220(64) ack 60 win 46
 <nop,nop,timestamp 3417924532 681688560>
 20:17:40.781488 IP cm-bbot-linux-001.sj.mozilla.com.60831 >
 github.com.git: . ack 156 win 108 <nop,nop,timestamp 681688580 3417924532>
 20:17:40.781495 IP cm-bbot-linux-001.sj.mozilla.com.60831 >
 github.com.git: . ack 220 win 108 <nop,nop,timestamp 681688580 3417924532>
 20:17:40.852168 IP github.com.git > cm-bbot-
 linux-001.sj.mozilla.com.60831: . 220:1668(1448) ack 60 win 46
 <nop,nop,timestamp 3417924550 681688580>
 20:17:40.852176 IP github.com.git > cm-bbot-
 linux-001.sj.mozilla.com.60831: . 1668:3116(1448) ack 60 win 46
 <nop,nop,timestamp 3417924550 681688580>
 20:17:40.852182 IP github.com.git > cm-bbot-
 linux-001.sj.mozilla.com.60831: . 3116:4564(1448) ack 60 win 46
 <nop,nop,timestamp 3417924550 681688580>
 20:17:40.852223 IP cm-bbot-linux-001.sj.mozilla.com.60831 >
 github.com.git: . ack 1668 win 154 <nop,nop,timestamp 681688598
 3417924550>
 20:17:40.852229 IP cm-bbot-linux-001.sj.mozilla.com.60831 >
 github.com.git: . ack 3116 win 199 <nop,nop,timestamp 681688598
 3417924550>
 20:17:40.852236 IP cm-bbot-linux-001.sj.mozilla.com.60831 >
 github.com.git: . ack 4564 win 244 <nop,nop,timestamp 681688598
 3417924550>
 20:17:40.852443 IP github.com.git > cm-bbot-
 linux-001.sj.mozilla.com.60831: . 4564:6012(1448) ack 60 win 46
 <nop,nop,timestamp 3417924550 681688580>
 20:17:40.852480 IP cm-bbot-linux-001.sj.mozilla.com.60831 >
 github.com.git: . ack 6012 win 289 <nop,nop,timestamp 681688598
 3417924550>
 20:17:40.923181 IP github.com.git > cm-bbot-
 linux-001.sj.mozilla.com.60831: P 6012:6852(840) ack 60 win 46
 <nop,nop,timestamp 3417924567 681688598>
 20:17:40.923213 IP cm-bbot-linux-001.sj.mozilla.com.60831 >
 github.com.git: . ack 6852 win 335 <nop,nop,timestamp 681688616
 3417924567>
 20:17:40.923265 IP cm-bbot-linux-001.sj.mozilla.com.60831 >
 github.com.git: P 60:64(4) ack 6852 win 335 <nop,nop,timestamp 681688616
 3417924567>
 20:17:40.927681 IP cm-bbot-linux-001.sj.mozilla.com.60832 >
 github.com.git: S 3825055815:3825055815(0) win 5840 <mss
 1460,sackOK,timestamp 681688617 0,nop,wscale 6>
 20:17:40.998555 IP github.com.git > cm-bbot-
 linux-001.sj.mozilla.com.60832: S 88648109:88648109(0) ack 3825055816 win
 5792 <mss 1460,sackOK,timestamp 1432901076 681688617,nop,wscal
 e 7>
 20:17:40.998573 IP cm-bbot-linux-001.sj.mozilla.com.60832 >
 github.com.git: . ack 1 win 92 <nop,nop,timestamp 681688634 1432901076>
 20:17:40.998625 IP cm-bbot-linux-001.sj.mozilla.com.60832 >
 github.com.git: P 1:60(59) ack 1 win 92 <nop,nop,timestamp 681688634
 1432901076>
 20:17:41.034573 IP github.com.git > cm-bbot-
 linux-001.sj.mozilla.com.60831: . ack 64 win 46 <nop,nop,timestamp
 3417924595 681688616>
 20:17:41.048303 IP github.com.git > cm-bbot-
 linux-001.sj.mozilla.com.60831: F 6852:6852(0) ack 64 win 46
 <nop,nop,timestamp 3417924599 681688616>
 20:17:41.069876 IP github.com.git > cm-bbot-
 linux-001.sj.mozilla.com.60832: . ack 60 win 46 <nop,nop,timestamp
 1432901094 681688634>
 20:17:41.080241 IP github.com.git > cm-bbot-
 linux-001.sj.mozilla.com.60832: P 1:346(345) ack 60 win 46
 <nop,nop,timestamp 1432901096 681688634>
 20:17:41.080248 IP github.com.git > cm-bbot-
 linux-001.sj.mozilla.com.60832: P 346:409(63) ack 60 win 46
 <nop,nop,timestamp 1432901096 681688634>
 20:17:41.080279 IP cm-bbot-linux-001.sj.mozilla.com.60832 >
 github.com.git: . ack 346 win 108 <nop,nop,timestamp 681688655 1432901096>
 20:17:41.080285 IP cm-bbot-linux-001.sj.mozilla.com.60832 >
 github.com.git: . ack 409 win 108 <nop,nop,timestamp 681688655 1432901096>
 20:17:41.086911 IP cm-bbot-linux-001.sj.mozilla.com.60831 >
 github.com.git: . ack 6853 win 335 <nop,nop,timestamp 681688657
 3417924599>
 20:17:41.151464 IP github.com.git > cm-bbot-
 linux-001.sj.mozilla.com.60832: P 409:1857(1448) ack 60 win 46
 <nop,nop,timestamp 1432901114 681688655>
 20:17:41.151471 IP github.com.git > cm-bbot-
 linux-001.sj.mozilla.com.60832: . 1857:3305(1448) ack 60 win 46
 <nop,nop,timestamp 1432901114 681688655>
 20:17:41.151476 IP github.com.git > cm-bbot-
 linux-001.sj.mozilla.com.60832: . 3305:4753(1448) ack 60 win 46
 <nop,nop,timestamp 1432901114 681688655>
 20:17:41.151480 IP github.com.git > cm-bbot-
 linux-001.sj.mozilla.com.60832: . 4753:6201(1448) ack 60 win 46
 <nop,nop,timestamp 1432901114 681688655>
 20:17:41.151515 IP cm-bbot-linux-001.sj.mozilla.com.60832 >
 github.com.git: . ack 1857 win 154 <nop,nop,timestamp 681688673
 1432901114>
 20:17:41.151521 IP cm-bbot-linux-001.sj.mozilla.com.60832 >
 github.com.git: . ack 3305 win 199 <nop,nop,timestamp 681688673
 1432901114>
 20:17:41.151527 IP cm-bbot-linux-001.sj.mozilla.com.60832 >
 github.com.git: . ack 4753 win 244 <nop,nop,timestamp 681688673
 1432901114>
 20:17:41.151533 IP cm-bbot-linux-001.sj.mozilla.com.60832 >
 github.com.git: . ack 6201 win 289 <nop,nop,timestamp 681688673
 1432901114>
 20:17:41.222399 IP github.com.git > cm-bbot-
 linux-001.sj.mozilla.com.60832: P 6201:6852(651) ack 60 win 46
 <nop,nop,timestamp 1432901132 681688673>
 20:17:41.222430 IP cm-bbot-linux-001.sj.mozilla.com.60832 >
 github.com.git: . ack 6852 win 335 <nop,nop,timestamp 681688690
 1432901132>
 20:17:41.236135 IP cm-bbot-linux-001.sj.mozilla.com.60832 >
 github.com.git: P 60:154(94) ack 6852 win 335 <nop,nop,timestamp 681688694
 1432901132>
 20:17:41.261797 IP cm-bbot-linux-001.sj.mozilla.com.60832 >
 github.com.git: . 154:1602(1448) ack 6852 win 335 <nop,nop,timestamp
 681688700 1432901132>
 20:17:41.332633 IP github.com.git > cm-bbot-
 linux-001.sj.mozilla.com.60832: . ack 1602 win 68 <nop,nop,timestamp
 1432901159 681688694>
 20:17:41.332684 IP cm-bbot-linux-001.sj.mozilla.com.60832 >
 github.com.git: P 1602:2871(1269) ack 6852 win 335 <nop,nop,timestamp
 681688718 1432901159>
 20:17:41.333357 IP github.com.git > cm-bbot-
 linux-001.sj.mozilla.com.60832: P 6852:6968(116) ack 1602 win 68
 <nop,nop,timestamp 1432901160 681688694>
 20:17:41.333618 IP github.com.git > cm-bbot-
 linux-001.sj.mozilla.com.60832: P 6968:7258(290) ack 1602 win 68
 <nop,nop,timestamp 1432901160 681688694>
 20:17:41.333626 IP github.com.git > cm-bbot-
 linux-001.sj.mozilla.com.60832: P 7258:7432(174) ack 1602 win 68
 <nop,nop,timestamp 1432901160 681688694>
 20:17:41.333646 IP cm-bbot-linux-001.sj.mozilla.com.60832 >
 github.com.git: . ack 7432 win 425 <nop,nop,timestamp 681688718
 1432901160>
 20:17:41.333872 IP github.com.git > cm-bbot-
 linux-001.sj.mozilla.com.60832: P 7432:7780(348) ack 1602 win 68
 <nop,nop,timestamp 1432901160 681688694>
 20:17:41.333880 IP github.com.git > cm-bbot-
 linux-001.sj.mozilla.com.60832: P 7780:8012(232) ack 1602 win 68
 <nop,nop,timestamp 1432901160 681688694>
 20:17:41.333904 IP cm-bbot-linux-001.sj.mozilla.com.60832 >
 github.com.git: . ack 8012 win 516 <nop,nop,timestamp 681688718
 1432901160>
 20:17:41.405513 IP github.com.git > cm-bbot-
 linux-001.sj.mozilla.com.60832: P 8012:9006(994) ack 2871 win 91
 <nop,nop,timestamp 1432901178 681688718>
 20:17:41.406102 IP github.com.git > cm-bbot-
 linux-001.sj.mozilla.com.60832: P 9006:9577(571) ack 2871 win 91
 <nop,nop,timestamp 1432901178 681688718>
 20:17:41.406119 IP cm-bbot-linux-001.sj.mozilla.com.60832 >
 github.com.git: . ack 9577 win 606 <nop,nop,timestamp 681688736
 1432901178>
 20:17:41.495128 IP github.com.git > cm-bbot-
 linux-001.sj.mozilla.com.60832: P 9577:9612(35) ack 2871 win 91
 <nop,nop,timestamp 1432901200 681688736>
 }}}

 I was worried about the small window sizes advertised by github.com, but
 it's still in slow-start mode because only about 2.5k are ever sent to
 that host.  In both cases, once things get rolling, github.com is sending
 full-MTU segments (1440 on my system, which uses 802.1q VLAN tagging, and
 1448 on the Mozilla system).

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