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Message-ID: <CAAHxn98G9kKtVi34mC+NHwasixZd63C8+s5gC5T5o-vKUVVoKQ@mail.gmail.com> Date: Mon, 19 May 2025 17:03:40 +0200 From: Simon Campion <simon.campion@...pl.com> To: Neal Cardwell <ncardwell@...gle.com> Cc: netdev@...r.kernel.org, Eric Dumazet <edumazet@...gle.com>, Yuchung Cheng <ycheng@...gle.com>, Kevin Yang <yyd@...gle.com> Subject: Re: [EXT] Re: tcp: socket stuck with zero receive window after SACK Gladly! I attached the output of nstat -az. I ran it twice, right before a 602 byte retransmit was received and dropped, and right after, in case looking at the diff is helpful. Here's the first run: #kernel IpInReceives 18788097214 0.0 IpInHdrErrors 47522 0.0 IpInAddrErrors 0 0.0 IpForwDatagrams 11778747 0.0 IpInUnknownProtos 0 0.0 IpInDiscards 0 0.0 IpInDelivers 18776248435 0.0 IpOutRequests 14428799907 0.0 IpOutDiscards 40798 0.0 IpOutNoRoutes 0 0.0 IpReasmTimeout 0 0.0 IpReasmReqds 32952 0.0 IpReasmOKs 16476 0.0 IpReasmFails 0 0.0 IpFragOKs 0 0.0 IpFragFails 0 0.0 IpFragCreates 0 0.0 IpOutTransmits 14440537900 0.0 IcmpInMsgs 7052154 0.0 IcmpInErrors 107 0.0 IcmpInCsumErrors 0 0.0 IcmpInDestUnreachs 100237 0.0 IcmpInTimeExcds 298 0.0 IcmpInParmProbs 0 0.0 IcmpInSrcQuenchs 0 0.0 IcmpInRedirects 67 0.0 IcmpInEchos 4035849 0.0 IcmpInEchoReps 2915703 0.0 IcmpInTimestamps 0 0.0 IcmpInTimestampReps 0 0.0 IcmpInAddrMasks 0 0.0 IcmpInAddrMaskReps 0 0.0 IcmpOutMsgs 7061967 0.0 IcmpOutErrors 0 0.0 IcmpOutRateLimitGlobal 0 0.0 IcmpOutRateLimitHost 47087 0.0 IcmpOutDestUnreachs 10421 0.0 IcmpOutTimeExcds 449 0.0 IcmpOutParmProbs 0 0.0 IcmpOutSrcQuenchs 0 0.0 IcmpOutRedirects 46216 0.0 IcmpOutEchos 2969032 0.0 IcmpOutEchoReps 4035849 0.0 IcmpOutTimestamps 0 0.0 IcmpOutTimestampReps 0 0.0 IcmpOutAddrMasks 0 0.0 IcmpOutAddrMaskReps 0 0.0 IcmpMsgInType0 2915703 0.0 IcmpMsgInType3 100237 0.0 IcmpMsgInType5 67 0.0 IcmpMsgInType8 4035849 0.0 IcmpMsgInType11 298 0.0 IcmpMsgOutType0 4035849 0.0 IcmpMsgOutType3 10421 0.0 IcmpMsgOutType5 46216 0.0 IcmpMsgOutType8 2969032 0.0 IcmpMsgOutType11 449 0.0 TcpActiveOpens 7902932 0.0 TcpPassiveOpens 1447146 0.0 TcpAttemptFails 41605 0.0 TcpEstabResets 1327046 0.0 TcpInSegs 4953075475 0.0 TcpOutSegs 2988066928 0.0 TcpRetransSegs 656187 0.0 TcpInErrs 0 0.0 TcpOutRsts 3401866 0.0 TcpInCsumErrors 0 0.0 UdpInDatagrams 13816173054 0.0 UdpNoPorts 10435 0.0 UdpInErrors 2 0.0 UdpOutDatagrams 493212273 0.0 UdpRcvbufErrors 0 0.0 UdpSndbufErrors 10 0.0 UdpInCsumErrors 0 0.0 UdpIgnoredMulti 0 0.0 UdpMemErrors 0 0.0 UdpLiteInDatagrams 0 0.0 UdpLiteNoPorts 0 0.0 UdpLiteInErrors 0 0.0 UdpLiteOutDatagrams 0 0.0 UdpLiteRcvbufErrors 0 0.0 UdpLiteSndbufErrors 0 0.0 UdpLiteInCsumErrors 0 0.0 UdpLiteIgnoredMulti 0 0.0 UdpLiteMemErrors 0 0.0 Ip6InReceives 268280 0.0 Ip6InHdrErrors 0 0.0 Ip6InTooBigErrors 0 0.0 Ip6InNoRoutes 39 0.0 Ip6InAddrErrors 0 0.0 Ip6InUnknownProtos 0 0.0 Ip6InTruncatedPkts 0 0.0 Ip6InDiscards 0 0.0 Ip6InDelivers 85862 0.0 Ip6OutForwDatagrams 0 0.0 Ip6OutRequests 500197 0.0 Ip6OutDiscards 1 0.0 Ip6OutNoRoutes 591 0.0 Ip6ReasmTimeout 0 0.0 Ip6ReasmReqds 0 0.0 Ip6ReasmOKs 0 0.0 Ip6ReasmFails 0 0.0 Ip6FragOKs 0 0.0 Ip6FragFails 0 0.0 Ip6FragCreates 0 0.0 Ip6InMcastPkts 194727 0.0 Ip6OutMcastPkts 426562 0.0 Ip6InOctets 20173005 0.0 Ip6OutOctets 45359068 0.0 Ip6InMcastOctets 14345494 0.0 Ip6OutMcastOctets 39440790 0.0 Ip6InBcastOctets 0 0.0 Ip6OutBcastOctets 0 0.0 Ip6InNoECTPkts 268280 0.0 Ip6InECT1Pkts 0 0.0 Ip6InECT0Pkts 0 0.0 Ip6InCEPkts 0 0.0 Ip6OutTransmits 500197 0.0 Icmp6InMsgs 23176 0.0 Icmp6InErrors 0 0.0 Icmp6OutMsgs 437389 0.0 Icmp6OutErrors 0 0.0 Icmp6InCsumErrors 0 0.0 Icmp6OutRateLimitHost 0 0.0 Icmp6InDestUnreachs 0 0.0 Icmp6InPktTooBigs 0 0.0 Icmp6InTimeExcds 0 0.0 Icmp6InParmProblems 0 0.0 Icmp6InEchos 0 0.0 Icmp6InEchoReplies 0 0.0 Icmp6InGroupMembQueries 0 0.0 Icmp6InGroupMembResponses 0 0.0 Icmp6InGroupMembReductions 0 0.0 Icmp6InRouterSolicits 12339 0.0 Icmp6InRouterAdvertisements 0 0.0 Icmp6InNeighborSolicits 2117 0.0 Icmp6InNeighborAdvertisements 8720 0.0 Icmp6InRedirects 0 0.0 Icmp6InMLDv2Reports 0 0.0 Icmp6OutDestUnreachs 0 0.0 Icmp6OutPktTooBigs 0 0.0 Icmp6OutTimeExcds 0 0.0 Icmp6OutParmProblems 0 0.0 Icmp6OutEchos 0 0.0 Icmp6OutEchoReplies 0 0.0 Icmp6OutGroupMembQueries 0 0.0 Icmp6OutGroupMembResponses 0 0.0 Icmp6OutGroupMembReductions 0 0.0 Icmp6OutRouterSolicits 2 0.0 Icmp6OutRouterAdvertisements 0 0.0 Icmp6OutNeighborSolicits 69476 0.0 Icmp6OutNeighborAdvertisements 2116 0.0 Icmp6OutRedirects 0 0.0 Icmp6OutMLDv2Reports 365795 0.0 Icmp6InType133 12339 0.0 Icmp6InType135 2117 0.0 Icmp6InType136 8720 0.0 Icmp6OutType133 2 0.0 Icmp6OutType135 69476 0.0 Icmp6OutType136 2116 0.0 Icmp6OutType143 365795 0.0 Udp6InDatagrams 6 0.0 Udp6NoPorts 0 0.0 Udp6InErrors 0 0.0 Udp6OutDatagrams 6 0.0 Udp6RcvbufErrors 0 0.0 Udp6SndbufErrors 0 0.0 Udp6InCsumErrors 0 0.0 Udp6IgnoredMulti 0 0.0 Udp6MemErrors 0 0.0 UdpLite6InDatagrams 0 0.0 UdpLite6NoPorts 0 0.0 UdpLite6InErrors 0 0.0 UdpLite6OutDatagrams 0 0.0 UdpLite6RcvbufErrors 0 0.0 UdpLite6SndbufErrors 0 0.0 UdpLite6InCsumErrors 0 0.0 UdpLite6MemErrors 0 0.0 TcpExtSyncookiesSent 0 0.0 TcpExtSyncookiesRecv 0 0.0 TcpExtSyncookiesFailed 0 0.0 TcpExtEmbryonicRsts 3 0.0 TcpExtPruneCalled 3891 0.0 TcpExtRcvPruned 0 0.0 TcpExtOfoPruned 0 0.0 TcpExtOutOfWindowIcmps 10 0.0 TcpExtLockDroppedIcmps 178 0.0 TcpExtArpFilter 0 0.0 TcpExtTW 3583160 0.0 TcpExtTWRecycled 4217 0.0 TcpExtTWKilled 0 0.0 TcpExtPAWSActive 0 0.0 TcpExtPAWSEstab 60 0.0 TcpExtDelayedACKs 5133416 0.0 TcpExtDelayedACKLocked 3008 0.0 TcpExtDelayedACKLost 111165 0.0 TcpExtListenOverflows 0 0.0 TcpExtListenDrops 0 0.0 TcpExtTCPHPHits 2023413 0.0 TcpExtTCPPureAcks 53087713 0.0 TcpExtTCPHPAcks 115340211 0.0 TcpExtTCPRenoRecovery 0 0.0 TcpExtTCPSackRecovery 13396 0.0 TcpExtTCPSACKReneging 0 0.0 TcpExtTCPSACKReorder 202 0.0 TcpExtTCPRenoReorder 0 0.0 TcpExtTCPTSReorder 1 0.0 TcpExtTCPFullUndo 0 0.0 TcpExtTCPPartialUndo 1 0.0 TcpExtTCPDSACKUndo 252 0.0 TcpExtTCPLossUndo 85 0.0 TcpExtTCPLostRetransmit 195718 0.0 TcpExtTCPRenoFailures 0 0.0 TcpExtTCPSackFailures 3 0.0 TcpExtTCPLossFailures 0 0.0 TcpExtTCPFastRetrans 381976 0.0 TcpExtTCPSlowStartRetrans 76 0.0 TcpExtTCPTimeouts 195387 0.0 TcpExtTCPLossProbes 110863 0.0 TcpExtTCPLossProbeRecovery 773 0.0 TcpExtTCPRenoRecoveryFail 0 0.0 TcpExtTCPSackRecoveryFail 38 0.0 TcpExtTCPRcvCollapsed 2960 0.0 TcpExtTCPBacklogCoalesce 252840759 0.0 TcpExtTCPDSACKOldSent 111216 0.0 TcpExtTCPDSACKOfoSent 2 0.0 TcpExtTCPDSACKRecv 77523 0.0 TcpExtTCPDSACKOfoRecv 3 0.0 TcpExtTCPAbortOnData 509577 0.0 TcpExtTCPAbortOnClose 1246626 0.0 TcpExtTCPAbortOnMemory 0 0.0 TcpExtTCPAbortOnTimeout 32 0.0 TcpExtTCPAbortOnLinger 0 0.0 TcpExtTCPAbortFailed 0 0.0 TcpExtTCPMemoryPressures 0 0.0 TcpExtTCPMemoryPressuresChrono 0 0.0 TcpExtTCPSACKDiscard 10 0.0 TcpExtTCPDSACKIgnoredOld 2 0.0 TcpExtTCPDSACKIgnoredNoUndo 73310 0.0 TcpExtTCPSpuriousRTOs 23 0.0 TcpExtTCPMD5NotFound 0 0.0 TcpExtTCPMD5Unexpected 0 0.0 TcpExtTCPMD5Failure 0 0.0 TcpExtTCPSackShifted 45975 0.0 TcpExtTCPSackMerged 248207 0.0 TcpExtTCPSackShiftFallback 328257 0.0 TcpExtTCPBacklogDrop 0 0.0 TcpExtPFMemallocDrop 0 0.0 TcpExtTCPMinTTLDrop 0 0.0 TcpExtTCPDeferAcceptDrop 0 0.0 TcpExtIPReversePathFilter 0 0.0 TcpExtTCPTimeWaitOverflow 0 0.0 TcpExtTCPReqQFullDoCookies 0 0.0 TcpExtTCPReqQFullDrop 0 0.0 TcpExtTCPRetransFail 55 0.0 TcpExtTCPRcvCoalesce 1575181380 0.0 TcpExtTCPOFOQueue 2661363 0.0 TcpExtTCPOFODrop 0 0.0 TcpExtTCPOFOMerge 2 0.0 TcpExtTCPChallengeACK 138 0.0 TcpExtTCPSYNChallenge 87 0.0 TcpExtTCPFastOpenActive 0 0.0 TcpExtTCPFastOpenActiveFail 0 0.0 TcpExtTCPFastOpenPassive 0 0.0 TcpExtTCPFastOpenPassiveFail 0 0.0 TcpExtTCPFastOpenListenOverflow 0 0.0 TcpExtTCPFastOpenCookieReqd 0 0.0 TcpExtTCPFastOpenBlackhole 0 0.0 TcpExtTCPSpuriousRtxHostQueues 118 0.0 TcpExtBusyPollRxPackets 0 0.0 TcpExtTCPAutoCorking 20400747 0.0 TcpExtTCPFromZeroWindowAdv 3612949 0.0 TcpExtTCPToZeroWindowAdv 3612953 0.0 TcpExtTCPWantZeroWindowAdv 0 0.0 TcpExtTCPSynRetrans 194466 0.0 TcpExtTCPOrigDataSent 1261792021 0.0 TcpExtTCPHystartTrainDetect 40140 0.0 TcpExtTCPHystartTrainCwnd 4828784 0.0 TcpExtTCPHystartDelayDetect 17 0.0 TcpExtTCPHystartDelayCwnd 8489 0.0 TcpExtTCPACKSkippedSynRecv 0 0.0 TcpExtTCPACKSkippedPAWS 3 0.0 TcpExtTCPACKSkippedSeq 580 0.0 TcpExtTCPACKSkippedFinWait2 0 0.0 TcpExtTCPACKSkippedTimeWait 0 0.0 TcpExtTCPACKSkippedChallenge 0 0.0 TcpExtTCPWinProbe 0 0.0 TcpExtTCPKeepAlive 2024725 0.0 TcpExtTCPMTUPFail 0 0.0 TcpExtTCPMTUPSuccess 0 0.0 TcpExtTCPDelivered 1269268682 0.0 TcpExtTCPDeliveredCE 0 0.0 TcpExtTCPAckCompressed 1028306 0.0 TcpExtTCPZeroWindowDrop 485489 0.0 TcpExtTCPRcvQDrop 0 0.0 TcpExtTCPWqueueTooBig 0 0.0 TcpExtTCPFastOpenPassiveAltKey 0 0.0 TcpExtTcpTimeoutRehash 195346 0.0 TcpExtTcpDuplicateDataRehash 53 0.0 TcpExtTCPDSACKRecvSegs 77539 0.0 TcpExtTCPDSACKIgnoredDubious 12 0.0 TcpExtTCPMigrateReqSuccess 0 0.0 TcpExtTCPMigrateReqFailure 0 0.0 TcpExtTCPPLBRehash 0 0.0 IpExtInNoRoutes 4 0.0 IpExtInTruncatedPkts 0 0.0 IpExtInMcastPkts 6 0.0 IpExtOutMcastPkts 16 0.0 IpExtInBcastPkts 0 0.0 IpExtOutBcastPkts 0 0.0 IpExtInOctets 115665856793051 0.0 IpExtOutOctets 20991618500174 0.0 IpExtInMcastOctets 306 0.0 IpExtOutMcastOctets 706 0.0 IpExtInBcastOctets 0 0.0 IpExtOutBcastOctets 0 0.0 IpExtInCsumErrors 0 0.0 IpExtInNoECTPkts 41778706183 0.0 IpExtInECT1Pkts 0 0.0 IpExtInECT0Pkts 299 0.0 IpExtInCEPkts 0 0.0 IpExtReasmOverlaps 0 0.0 And here's the diff: 2c2 < IpInReceives 18788097214 0.0 --- > IpInReceives 18788830514 0.0 5c5 < IpForwDatagrams 11778747 0.0 --- > IpForwDatagrams 11778974 0.0 8,9c8,9 < IpInDelivers 18776248435 0.0 < IpOutRequests 14428799907 0.0 --- > IpInDelivers 18776981508 0.0 > IpOutRequests 14429439831 0.0 19,20c19,20 < IpOutTransmits 14440537900 0.0 < IcmpInMsgs 7052154 0.0 --- > IpOutTransmits 14441178051 0.0 > IcmpInMsgs 7052682 0.0 23c23 < IcmpInDestUnreachs 100237 0.0 --- > IcmpInDestUnreachs 100240 0.0 28,29c28,29 < IcmpInEchos 4035849 0.0 < IcmpInEchoReps 2915703 0.0 --- > IcmpInEchos 4035969 0.0 > IcmpInEchoReps 2916108 0.0 34c34 < IcmpOutMsgs 7061967 0.0 --- > IcmpOutMsgs 7062503 0.0 43,44c43,44 < IcmpOutEchos 2969032 0.0 < IcmpOutEchoReps 4035849 0.0 --- > IcmpOutEchos 2969448 0.0 > IcmpOutEchoReps 4035969 0.0 49,50c49,50 < IcmpMsgInType0 2915703 0.0 < IcmpMsgInType3 100237 0.0 --- > IcmpMsgInType0 2916108 0.0 > IcmpMsgInType3 100240 0.0 52c52 < IcmpMsgInType8 4035849 0.0 --- > IcmpMsgInType8 4035969 0.0 54c54 < IcmpMsgOutType0 4035849 0.0 --- > IcmpMsgOutType0 4035969 0.0 57c57 < IcmpMsgOutType8 2969032 0.0 --- > IcmpMsgOutType8 2969448 0.0 59,65c59,65 < TcpActiveOpens 7902932 0.0 < TcpPassiveOpens 1447146 0.0 < TcpAttemptFails 41605 0.0 < TcpEstabResets 1327046 0.0 < TcpInSegs 4953075475 0.0 < TcpOutSegs 2988066928 0.0 < TcpRetransSegs 656187 0.0 --- > TcpActiveOpens 7903289 0.0 > TcpPassiveOpens 1447188 0.0 > TcpAttemptFails 41607 0.0 > TcpEstabResets 1327071 0.0 > TcpInSegs 4953086019 0.0 > TcpOutSegs 2988189227 0.0 > TcpRetransSegs 656198 0.0 67c67 < TcpOutRsts 3401866 0.0 --- > TcpOutRsts 3401906 0.0 69c69 < UdpInDatagrams 13816173054 0.0 --- > UdpInDatagrams 13816895055 0.0 72c72 < UdpOutDatagrams 493212273 0.0 --- > UdpOutDatagrams 493225063 0.0 87c87 < Ip6InReceives 268280 0.0 --- > Ip6InReceives 268283 0.0 95c95 < Ip6InDelivers 85862 0.0 --- > Ip6InDelivers 85865 0.0 97c97 < Ip6OutRequests 500197 0.0 --- > Ip6OutRequests 500200 0.0 109,110c109,110 < Ip6InOctets 20173005 0.0 < Ip6OutOctets 45359068 0.0 --- > Ip6InOctets 20173232 0.0 > Ip6OutOctets 45359303 0.0 115c115 < Ip6InNoECTPkts 268280 0.0 --- > Ip6InNoECTPkts 268283 0.0 119,120c119,120 < Ip6OutTransmits 500197 0.0 < Icmp6InMsgs 23176 0.0 --- > Ip6OutTransmits 500200 0.0 > Icmp6InMsgs 23177 0.0 122c122 < Icmp6OutMsgs 437389 0.0 --- > Icmp6OutMsgs 437390 0.0 138c138 < Icmp6InNeighborAdvertisements 8720 0.0 --- > Icmp6InNeighborAdvertisements 8721 0.0 152c152 < Icmp6OutNeighborSolicits 69476 0.0 --- > Icmp6OutNeighborSolicits 69477 0.0 158c158 < Icmp6InType136 8720 0.0 --- > Icmp6InType136 8721 0.0 160c160 < Icmp6OutType135 69476 0.0 --- > Icmp6OutType135 69477 0.0 190c190 < TcpExtTW 3583160 0.0 --- > TcpExtTW 3583407 0.0 195c195 < TcpExtDelayedACKs 5133416 0.0 --- > TcpExtDelayedACKs 5133551 0.0 200,202c200,202 < TcpExtTCPHPHits 2023413 0.0 < TcpExtTCPPureAcks 53087713 0.0 < TcpExtTCPHPAcks 115340211 0.0 --- > TcpExtTCPHPHits 2023452 0.0 > TcpExtTCPPureAcks 53091101 0.0 > TcpExtTCPHPAcks 115343941 0.0 213c213 < TcpExtTCPLostRetransmit 195718 0.0 --- > TcpExtTCPLostRetransmit 195727 0.0 219,220c219,220 < TcpExtTCPTimeouts 195387 0.0 < TcpExtTCPLossProbes 110863 0.0 --- > TcpExtTCPTimeouts 195398 0.0 > TcpExtTCPLossProbes 110865 0.0 225c225 < TcpExtTCPBacklogCoalesce 252840759 0.0 --- > TcpExtTCPBacklogCoalesce 252840913 0.0 230,231c230,231 < TcpExtTCPAbortOnData 509577 0.0 < TcpExtTCPAbortOnClose 1246626 0.0 --- > TcpExtTCPAbortOnData 509579 0.0 > TcpExtTCPAbortOnClose 1246649 0.0 257c257 < TcpExtTCPRcvCoalesce 1575181380 0.0 --- > TcpExtTCPRcvCoalesce 1575181523 0.0 272c272 < TcpExtTCPAutoCorking 20400747 0.0 --- > TcpExtTCPAutoCorking 20401664 0.0 276,279c276,279 < TcpExtTCPSynRetrans 194466 0.0 < TcpExtTCPOrigDataSent 1261792021 0.0 < TcpExtTCPHystartTrainDetect 40140 0.0 < TcpExtTCPHystartTrainCwnd 4828784 0.0 --- > TcpExtTCPSynRetrans 194477 0.0 > TcpExtTCPOrigDataSent 1261911536 0.0 > TcpExtTCPHystartTrainDetect 40143 0.0 > TcpExtTCPHystartTrainCwnd 4829428 0.0 289c289 < TcpExtTCPKeepAlive 2024725 0.0 --- > TcpExtTCPKeepAlive 2024763 0.0 292c292 < TcpExtTCPDelivered 1269268682 0.0 --- > TcpExtTCPDelivered 1269388548 0.0 295c295 < TcpExtTCPZeroWindowDrop 485489 0.0 --- > TcpExtTCPZeroWindowDrop 485490 0.0 299c299 < TcpExtTcpTimeoutRehash 195346 0.0 --- > TcpExtTcpTimeoutRehash 195357 0.0 312,313c312,313 < IpExtInOctets 115665856793051 0.0 < IpExtOutOctets 20991618500174 0.0 --- > IpExtInOctets 115667256768208 0.0 > IpExtOutOctets 20993368512190 0.0 319c319 < IpExtInNoECTPkts 41778706183 0.0 --- > IpExtInNoECTPkts 41780216583 0.0 On Mon, 19 May 2025 at 16:42, Neal Cardwell <ncardwell@...gle.com> wrote: > > On Mon, May 19, 2025 at 9:31 AM Simon Campion <simon.campion@...pl.com> wrote: > > > > Hi all, > > > > We have a TCP socket that's stuck in the following state: > > > > * it SACKed ~40KB of data, but misses 602 bytes at the beginning > > * it has a zero receive window > > * the Recv-Q as reported by ss is 0 > > > > Due to the zero window, the kernel drops the missing 602 bytes when > > the peer sends them. So, the socket is stuck indefinitely waiting for > > data it drops when it receives it. Since the Recv-Q as reported by ss > > is 0, we suspect the receive window is not 0 because the owner of the > > socket isn't reading data. Rather, we wonder whether the kernel SACKed > > too much data than it should have, given the receive buffer size, not > > leaving enough space to store the missing bytes when they arrive. > > Could this happen? > > > > We don't have a reproducer for this issue. The socket is still in this > > state, so we're happy to provide more debugging information while we > > have it. This is the first time we've seen this problem. > > > > Here are more details: > > > > # uname -r > > 6.6.83-flatcar > > Thanks for the detailed report! > > Can you please attach the output of the following command, run on the > same machine (and in the same network namespace) as the socket with > the receive buffer that is almost full: > > nstat -az > /tmp/nstat.txt > > This should help us get a better idea about which "prune" methods are > being tried, and which of them are failing to free up enough memory. > > Thanks! > neal View attachment "nstat_2_52.txt" of type "text/plain" (17718 bytes) View attachment "nstat_2_51.txt" of type "text/plain" (17718 bytes)
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