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** [tickets:#3119] mds: sender take very long time to send all messages**
**Status:** assigned
**Milestone:** 5.20.01
**Created:** Tue Nov 12, 2019 04:28 AM UTC by Thuan Tran
**Last Updated:** Tue Nov 12, 2019 04:28 AM UTC
**Owner:** Thuan Tran
mdstest 27 3 failed because still not finish after 5 minutes timeout.
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<141>1 2019-11-06T19:12:14.000741+01:00 SC-1 mdstest 3207 mds.log [meta
sequenceId="3255"] FCTRL: [me] --> [node:1001001, ref:1097055188],
SndQData[fseq:1511, len:50043], sndwnd[acked:1510, send:2001, nacked:1100946]
<141>1 2019-11-06T19:12:14.0009+01:00 SC-1 mdstest 3207 mds.log [meta
sequenceId="3256"] FCTRL: [me] --> [node:1001001, ref:1097055188],
SndQData[fseq:1512, len:50043], sndwnd[acked:1510, send:2001, nacked:1150989]
<141>1 2019-11-06T19:12:15.00198+01:00 SC-1 mdstest 3207 mds.log [meta
sequenceId="3257"] FCTRL: [me] --> [node:1001001, ref:1097055188],
SndQData[fseq:1513, len:50043], sndwnd[acked:1512, send:2001, nacked:1100946]
<141>1 2019-11-06T19:12:15.00218+01:00 SC-1 mdstest 3207 mds.log [meta
sequenceId="3258"] FCTRL: [me] --> [node:1001001, ref:1097055188],
SndQData[fseq:1514, len:50043], sndwnd[acked:1512, send:2001, nacked:1150989]
<141>1 2019-11-06T19:12:16.002938+01:00 SC-1 mdstest 3207 mds.log [meta
sequenceId="3259"] FCTRL: [me] --> [node:1001001, ref:1097055188],
SndQData[fseq:1515, len:50043], sndwnd[acked:1514, send:2001, nacked:1100946]
<141>1 2019-11-06T19:12:16.003065+01:00 SC-1 mdstest 3207 mds.log [meta
sequenceId="3260"] FCTRL: [me] --> [node:1001001, ref:1097055188],
SndQData[fseq:1516, len:50043], sndwnd[acked:1514, send:2001, nacked:1150989]
<141>1 2019-11-06T19:12:17.004259+01:00 SC-1 mdstest 3207 mds.log [meta
sequenceId="3261"] FCTRL: [me] --> [node:1001001, ref:1097055188],
SndQData[fseq:1517, len:50043], sndwnd[acked:1516, send:2001, nacked:1100946]
<141>1 2019-11-06T19:12:17.004391+01:00 SC-1 mdstest 3207 mds.log [meta
sequenceId="3262"] FCTRL: [me] --> [node:1001001, ref:1097055188],
SndQData[fseq:1518, len:50043], sndwnd[acked:1516, send:2001, nacked:1150989]
<141>1 2019-11-06T19:12:18.005538+01:00 SC-1 mdstest 3207 mds.log [meta
sequenceId="3263"] FCTRL: [me] --> [node:1001001, ref:1097055188],
SndQData[fseq:1519, len:50043], sndwnd[acked:1518, send:2001, nacked:1100946]
<141>1 2019-11-06T19:12:18.005657+01:00 SC-1 mdstest 3207 mds.log [meta
sequenceId="3264"] FCTRL: [me] --> [node:1001001, ref:1097055188],
SndQData[fseq:1520, len:50043], sndwnd[acked:1518, send:2001, nacked:1150989]
<141>1 2019-11-06T19:12:19.006773+01:00 SC-1 mdstest 3207 mds.log [meta
sequenceId="3265"] FCTRL: [me] --> [node:1001001, ref:1097055188],
SndQData[fseq:1521, len:50043], sndwnd[acked:1520, send:2001, nacked:1100946]
<141>1 2019-11-06T19:12:19.007061+01:00 SC-1 mdstest 3207 mds.log [meta
sequenceId="3266"] FCTRL: [me] --> [node:1001001, ref:1097055188],
SndQData[fseq:1522, len:50043], sndwnd[acked:1520, send:2001, nacked:1150989]
<141>1 2019-11-06T19:12:20.007882+01:00 SC-1 mdstest 3207 mds.log [meta
sequenceId="3267"] FCTRL: [me] --> [node:1001001, ref:1097055188],
SndQData[fseq:1523, len:50043], sndwnd[acked:1522, send:2001, nacked:1100946]
<141>1 2019-11-06T19:12:20.008005+01:00 SC-1 mdstest 3207 mds.log [meta
sequenceId="3268"] FCTRL: [me] --> [node:1001001, ref:1097055188],
SndQData[fseq:1524, len:50043], sndwnd[acked:1522, send:2001, nacked:1150989]
<141>1 2019-11-06T19:12:21.009234+01:00 SC-1 mdstest 3207 mds.log [meta
sequenceId="3269"] FCTRL: [me] --> [node:1001001, ref:1097055188],
SndQData[fseq:1525, len:50043], sndwnd[acked:1524, send:2001, nacked:1100946]
<141>1 2019-11-06T19:12:21.009381+01:00 SC-1 mdstest 3207 mds.log [meta
sequenceId="3270"] FCTRL: [me] --> [node:1001001, ref:1097055188],
SndQData[fseq:1526, len:50043], sndwnd[acked:1524, send:2001, nacked:1150989]
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>From mds.log, sender only send 2 msg in one second, sender wait for chunkAck
>from receiver
but receiver only get 2 msg (5 to send chunkAck) then wait timer timeout then
send ChunkAck of 2 msg.
This scenario repeat make this communication become very long time.
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