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mongod crash, bug fix when connections > wiredtiger's session_max #1582

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mongod crash, bug fix when connections > wiredtiger's session_max #1582

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if user's max connections is greater than wiredtiger's session_max， it will crush.

wiredtiger's session_max must great than user's connection.

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y123456yz commented Nov 2, 2023 •
edited by edzh
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2023-10-30T03:53:07.009+0000 I NETWORK  [conn57884] received client metadata from xxx15.12:58836 conn57884: { driver: { name: "NetworkInterfaceTL", version: "4.0.3" }, os: { type: "Linux", name: "Ubuntu", architecture: "x86_64", version: "16.04" } }
2023-10-30T03:53:07.014+0000 I NETWORK  [conn57887] received client metadata from 1xxx.15.12:58838 conn57887: { driver: { name: "NetworkInterfaceTL", version: "4.0.3" }, os: { type: "Linux", name: "Ubuntu", architecture: "x86_64", version: "16.04" } }
2023-10-30T03:53:07.015+0000 I ACCESS   [conn57883] Successfully authenticated as principal __system on local
2023-10-30T03:53:07.023+0000 I ACCESS   [conn57886] Successfully authenticated as principal __system on local
2023-10-30T03:53:07.024+0000 I ACCESS   [conn57887] Successfully authenticated as principal __system on local
2023-10-30T03:53:07.024+0000 I ACCESS   [conn57885] Successfully authenticated as principal __system on local
2023-10-30T03:53:07.025+0000 I ACCESS   [conn57884] Successfully authenticated as principal __system on local
2023-10-30T03:53:07.026+0000 I ACCESS   [conn57879] Successfully authenticated as principal __system on local
2023-10-30T03:53:07.028+0000 E STORAGE  [conn57884] WiredTiger error (-31802) [1698637987:28742][1:0x7f3f0ebf5700], WT_CONNECTION.open_session: __open_session, 2161: out of sessions, configured for 20030 (including internal sessions): WT_ERROR: non-specific WiredTiger error Raw: [1698637987:28742][1:0x7f3f0ebf5700], WT_CONNECTION.open_session: __open_session, 2161: out of sessions, configured for 20030 (including internal sessions): WT_ERROR: non-specific WiredTiger error
2023-10-30T03:53:07.028+0000 F -        [conn57884] Invariant failure: conn->open_session(conn, NULL, "isolation=snapshot", &_session) resulted in status UnknownError: -31802: WT_ERROR: non-specific WiredTiger error at src/mongo/db/storage/wiredtiger/wiredtiger_session_cache.cpp 103
2023-10-30T03:53:07.031+0000 E STORAGE  [conn57886] WiredTiger error (-31802) [1698637987:31368][1:0x7f3f0e9f3700], WT_CONNECTION.open_session: __open_session, 2161: out of sessions, configured for 20030 (including internal sessions): WT_ERROR: non-specific WiredTiger error Raw: [1698637987:31368][1:0x7f3f0e9f3700], WT_CONNECTION.open_session: __open_session, 2161: out of sessions, configured for 20030 (including internal sessions): WT_ERROR: non-specific WiredTiger error
2023-10-30T03:53:07.031+0000 F -        [conn57886] Invariant failure: conn->open_session(conn, NULL, "isolation=snapshot", &_session) resulted in status UnknownError: -31802: WT_ERROR: non-specific WiredTiger error at src/mongo/db/storage/wiredtiger/wiredtiger_session_cache.cpp 103
2023-10-30T03:53:07.041+0000 F -        [conn57884] 

***aborting after invariant() failure


2023-10-30T03:53:07.041+0000 F -        [conn57886] 

***aborting after invariant() failure


2023-10-30T03:53:07.042+0000 E STORAGE  [conn57120] WiredTiger error (-31802) [1698637987:42823][1:0x7f3f3e9f0700], WT_CONNECTION.open_session: __open_session, 2161: out of sessions, configured for 20030 (including internal sessions): WT_ERROR: non-specific WiredTiger error Raw: [1698637987:42823][1:0x7f3f3e9f0700], WT_CONNECTION.open_session: __open_session, 2161: out of sessions, configured for 20030 (including internal sessions): WT_ERROR: non-specific WiredTiger error
2023-10-30T03:53:07.042+0000 F -        [conn57120] Invariant failure: conn->open_session(conn, NULL, "isolation=snapshot", &_session) resulted in status UnknownError: -31802: WT_ERROR: non-specific WiredTiger error at src/mongo/db/storage/wiredtiger/wiredtiger_session_cache.cpp 103
2023-10-30T03:53:07.042+0000 F -        [conn57120] 

***aborting after invariant() failure


2023-10-30T03:53:07.052+0000 E STORAGE  [conn57876] WiredTiger error (-31802) [1698637987:52901][1:0x7f3f0f3fd700], WT_CONNECTION.open_session: __open_session, 2161: out of sessions, configured for 20030 (including internal sessions): WT_ERROR: non-specific WiredTiger error Raw: [1698637987:52901][1:0x7f3f0f3fd700], WT_CONNECTION.open_session: __open_session, 2161: out of sessions, configured for 20030 (including internal sessions): WT_ERROR: non-specific WiredTiger error
2023-10-30T03:53:07.052+0000 F -        [conn57876] Invariant failure: conn->open_session(conn, NULL, "isolation=snapshot", &_session) resulted in status UnknownError: -31802: WT_ERROR: non-specific WiredTiger error at src/mongo/db/storage/wiredtiger/wiredtiger_session_cache.cpp 103
2023-10-30T03:53:07.053+0000 F -        [conn57876] 

***aborting after invariant() failure


2023-10-30T03:53:07.056+0000 I NETWORK  [listener] connection accepted from 172.16.16.8:47402 #57888 (21018 connections now open)
2023-10-30T03:53:07.057+0000 I NETWORK  [listener] connection accepted from 172.16.16.8:47404 #57889 (21019 connections now open)
2023-10-30T03:53:07.057+0000 I NETWORK  [listener] connection accepted from 172.16.15.12:58842 #57890 (21020 connections now open)
2023-10-30T03:53:07.057+0000 I NETWORK  [listener] connection accepted from 172.16.15.12:58844 #57891 (21021 connections now open)
2023-10-30T03:53:07.057+0000 I NETWORK  [listener] connection accepted from 172.16.14.4:46470 #57892 (21022 connections now open)
2023-10-30T03:53:07.057+0000 I NETWORK  [listener] connection accepted from 172.16.14.4:46474 #57893 (21023 connections now open)
2023-10-30T03:53:07.091+0000 F -        [conn57884] Got signal: 6 (Aborted).
 0x560bd015c071 0x560bd015b289 0x560bd015b76d 0x7f445dae5390 0x7f445d73f428 0x7f445d74102a 0x560bce79a4c8 0x560bce8857ab 0x560bce8867b8 0x560bce8817ad 0x560bce884345 0x560bce88508d 0x560bce857b65 0x560bcf883c4e 0x560bcf03c7aa 0x560bcf0514bb 0x560bcf0a1f6d 0x560bcf0a28fb 0x560bcee2fcb5 0x560bcfbcbae9 0x560bce84457b 0x560bce846957 0x560bce848d29 0x560bce849c61 0x560bce83723a 0x560bcf87dbed 0x560bcf87e274 0x560bcfb28f16 0x560bcfb183d6 0x560bcf87e370 0x560bcfb217d6 0x560bcfb21d9f 0x560bcf6c3d30 0x560bcf6c9d07 0x560bce845089 0x560bce848d29 0x560bce849c61 0x560bce83723a 0x560bce841faa 0x560bce83cc77 0x560bce840481 0x560bcf9fab62 0x560bce83ae8f 0x560bce83e025 0x560bce83c3b7 0x560bce83ccfd 0x560bce840481 0x560bcf9fb0c5 0x560bd00b5634 0x7f445dadb6ba 0x7f445d81141d
----- BEGIN BACKTRACE -----
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"mongodbVersion" : "4.0.3", "gitVersion" : "7ea530946fa7880364d88c8d8b6026bbc9ffa48c", "compiledModules" : [], "uname" : { "sysname" : "Linux", "release" : "5.4.119-19-0008", "version" : "#1 SMP Mon Sep 13 14:54:39 CST 2021", "machine" : "x86_64" }, "somap" : [ { "b" : "560BCDD8E000", "elfType" : 3, "buildId" : "5CEC4F75328106C4E3A4535157518B166B4D38FD" }, { "b" : "7FFDC1E14000", "elfType" : 3, "buildId" : "57CC276D5EF9C861BC97A133F873E93734397F5B" }, { "b" : "7F445EEE4000", "path" : "/usr/lib/x86_64-linux-gnu/libcurl.so.4", "elfType" : 3, "buildId" : "5D192460BE804CC9B9807E6D49834431CBF20E9A" }, { "b" : "7F445ECC9000", "path" : "/lib/x86_64-linux-gnu/libresolv.so.2", "elfType" : 3, "buildId" : "6EF73266978476EF9F2FD2CF31E57F4597CB74F8" }, { "b" : "7F445E885000", "path" : "/lib/x86_64-linux-gnu/libcrypto.so.1.0.0", "elfType" : 3, "buildId" : "250E875F74377DFC74DE48BF80CCB237BB4EFF1D" }, { "b" : "7F445E61C000", "path" : "/lib/x86_64-linux-gnu/libssl.so.1.0.0", "elfType" : 3, "buildId" : 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"1E16CB57F699E215A2A8D4EFEF90883BC749B12D" }, { "b" : "7F445B6CE000", "path" : "/usr/lib/x86_64-linux-gnu/libkrb5support.so.0", "elfType" : 3, "buildId" : "DF3219B89E86920E901BAC4A80AA60F2B6134588" }, { "b" : "7F445B4B3000", "path" : "/usr/lib/x86_64-linux-gnu/libsasl2.so.2", "elfType" : 3, "buildId" : "96BCC7EB28D81B1469EED6F24FC083CBD58577BC" }, { "b" : "7F445B272000", "path" : "/usr/lib/x86_64-linux-gnu/libgssapi.so.3", "elfType" : 3, "buildId" : "1FE877BE52A424D0636AFD4D35BB330E41D6E0F3" }, { "b" : "7F445B00E000", "path" : "/usr/lib/x86_64-linux-gnu/libp11-kit.so.0", "elfType" : 3, "buildId" : "A0E2D03FF5CF65937F4425D4EFD4D655243809EB" }, { "b" : "7F445ADFB000", "path" : "/usr/lib/x86_64-linux-gnu/libtasn1.so.6", "elfType" : 3, "buildId" : "E07E186694852D8F69459C6AB28A53F8DA3CE3B6" }, { "b" : "7F445ABF7000", "path" : "/lib/x86_64-linux-gnu/libkeyutils.so.1", "elfType" : 3, "buildId" : "3364D4BF2113C4E8D17EF533867ECC99A53413D6" }, { "b" : "7F445A9EE000", "path" : "/usr/lib/x86_64-linux-gnu/libheimntlm.so.0", "elfType" : 3, "buildId" : "73A8EADBC85860662B24850E71D4AFBE22C33359" }, { "b" : "7F445A764000", "path" : "/usr/lib/x86_64-linux-gnu/libkrb5.so.26", "elfType" : 3, "buildId" : "59E742306A4EA2872E061ECCE92F35FADDA75357" }, { "b" : "7F445A4C2000", "path" : "/usr/lib/x86_64-linux-gnu/libasn1.so.8", "elfType" : 3, "buildId" : "E5C159E415406AE79D21056D752BA949C408B5B1" }, { "b" : "7F445A28F000", "path" : "/usr/lib/x86_64-linux-gnu/libhcrypto.so.4", "elfType" : 3, "buildId" : "7D15576E1F096614D360784E4A01A1F5FAF908C9" }, { "b" : "7F445A079000", "path" : "/usr/lib/x86_64-linux-gnu/libroken.so.18", "elfType" : 3, "buildId" : "481DB33C28D88E43DA6BED65E1A7599407D4D818" }, { "b" : "7F4459E71000", "path" : "/usr/lib/x86_64-linux-gnu/libffi.so.6", "elfType" : 3, "buildId" : "9D9C958F1F4894AFEF6AECD90D1C430EA29AC34F" }, { "b" : "7F4459C48000", "path" : "/usr/lib/x86_64-linux-gnu/libwind.so.0", "elfType" : 3, "buildId" : 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 mongod(_ZN5mongo15printStackTraceERSo+0x41) [0x560bd015c071]
 mongod(+0x23CD289) [0x560bd015b289]
 mongod(+0x23CD76D) [0x560bd015b76d]
 libpthread.so.0(+0x11390) [0x7f445dae5390]
 libc.so.6(gsignal+0x38) [0x7f445d73f428]
 libc.so.6(abort+0x16A) [0x7f445d74102a]
 mongod(_ZN5mongo24invariantOKFailedWithMsgEPKcRKNS_6StatusERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEES1_j+0x0) [0x560bce79a4c8]
 mongod(_ZN5mongo17WiredTigerSessionC2EP15__wt_connectionPNS_22WiredTigerSessionCacheEmm+0xBB) [0x560bce8857ab]
 mongod(_ZN5mongo22WiredTigerSessionCache10getSessionEv+0xE8) [0x560bce8867b8]
 mongod(+0xAF37AD) [0x560bce8817ad]
 mongod(_ZN5mongo22WiredTigerRecoveryUnit8_txnOpenEv+0x4B5) [0x560bce884345]
 mongod(_ZN5mongo16WiredTigerCursorC1ERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEmbPNS_16OperationContextE+0x8D) [0x560bce88508d]
 mongod(_ZNK5mongo21WiredTigerIndexUnique9newCursorEPNS_16OperationContextEb+0x165) [0x560bce857b65]
 mongod(_ZNK5mongo17IndexAccessMethod10findSingleEPNS_16OperationContextERKNS_7BSONObjE+0xFE) [0x560bcf883c4e]
 mongod(_ZN5mongo11IDHackStage6doWorkEPm+0x14A) [0x560bcf03c7aa]
 mongod(_ZN5mongo9PlanStage4workEPm+0x6B) [0x560bcf0514bb]
 mongod(_ZN5mongo12PlanExecutor11getNextImplEPNS_11SnapshottedINS_7BSONObjEEEPNS_8RecordIdE+0x50D) [0x560bcf0a1f6d]
 mongod(_ZN5mongo12PlanExecutor7getNextEPNS_7BSONObjEPNS_8RecordIdE+0x4B) [0x560bcf0a28fb]
 mongod(+0x10A1CB5) [0x560bcee2fcb5]
 mongod(_ZN5mongo12BasicCommand10Invocation3runEPNS_16OperationContextEPNS_19CommandReplyBuilderE+0xD9) [0x560bcfbcbae9]
 mongod(+0xAB657B) [0x560bce84457b]
 mongod(+0xAB8957) [0x560bce846957]
 mongod(+0xABAD29) [0x560bce848d29]
 mongod(_ZN5mongo23ServiceEntryPointCommon13handleRequestEPNS_16OperationContextERKNS_7MessageERKNS0_5HooksE+0x3C1) [0x560bce849c61]
 mongod(_ZN5mongo23ServiceEntryPointMongod13handleRequestEPNS_16OperationContextERKNS_7MessageE+0x3A) [0x560bce83723a]
 mongod(+0x1AEFBED) [0x560bcf87dbed]
 mongod(_ZN5mongo14DBDirectClient4callERNS_7MessageES2_bPNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE+0x34) [0x560bcf87e274]
 mongod(_ZN5mongo14DBClientCursor4initEv+0x76) [0x560bcfb28f16]
 mongod(_ZN5mongo12DBClientBase5queryERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEENS_5QueryEiiPKNS_7BSONObjEii+0x66) [0x560bcfb183d6]
 mongod(_ZN5mongo14DBDirectClient5queryERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEENS_5QueryEiiPKNS_7BSONObjEii+0x50) [0x560bcf87e370]
 mongod(_ZN5mongo12DBClientBase5findNERSt6vectorINS_7BSONObjESaIS2_EERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEENS_5QueryEiiPKS2_i+0xB6) [0x560bcfb217d6]
 mongod(_ZN5mongo12DBClientBase7findOneERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEERKNS_5QueryEPKNS_7BSONObjEi+0x6F) [0x560bcfb21d9f]
 mongod(_ZN5mongo7Session26refreshFromStorageIfNeededEPNS_16OperationContextE+0x3B0) [0x560bcf6c3d30]
 mongod(_ZN5mongo23OperationContextSessionC2EPNS_16OperationContextEbN5boost8optionalIbEES5_NS_10StringDataES6_+0x367) [0x560bcf6c9d07]
 mongod(+0xAB7089) [0x560bce845089]
 mongod(+0xABAD29) [0x560bce848d29]
 mongod(_ZN5mongo23ServiceEntryPointCommon13handleRequestEPNS_16OperationContextERKNS_7MessageERKNS0_5HooksE+0x3C1) [0x560bce849c61]
 mongod(_ZN5mongo23ServiceEntryPointMongod13handleRequestEPNS_16OperationContextERKNS_7MessageE+0x3A) [0x560bce83723a]
 mongod(_ZN5mongo19ServiceStateMachine15_processMessageENS0_11ThreadGuardE+0xBA) [0x560bce841faa]
 mongod(_ZN5mongo19ServiceStateMachine15_runNextInGuardENS0_11ThreadGuardE+0x97) [0x560bce83cc77]
 mongod(+0xAB2481) [0x560bce840481]
 mongod(_ZN5mongo9transport26ServiceExecutorSynchronous8scheduleESt8functionIFvvEENS0_15ServiceExecutor13ScheduleFlagsENS0_23ServiceExecutorTaskNameE+0x1A2) [0x560bcf9fab62]
 mongod(_ZN5mongo19ServiceStateMachine22_scheduleNextWithGuardENS0_11ThreadGuardENS_9transport15ServiceExecutor13ScheduleFlagsENS2_23ServiceExecutorTaskNameENS0_9OwnershipE+0x15F) [0x560bce83ae8f]
 mongod(_ZN5mongo19ServiceStateMachine15_sourceCallbackENS_6StatusE+0xAF5) [0x560bce83e025]
 mongod(_ZN5mongo19ServiceStateMachine14_sourceMessageENS0_11ThreadGuardE+0x357) [0x560bce83c3b7]
 mongod(_ZN5mongo19ServiceStateMachine15_runNextInGuardENS0_11ThreadGuardE+0x11D) [0x560bce83ccfd]
 mongod(+0xAB2481) [0x560bce840481]
 mongod(+0x1C6D0C5) [0x560bcf9fb0c5]
 mongod(+0x2327634) [0x560bd00b5634]
 libpthread.so.0(+0x76BA) [0x7f445dadb6ba]
 libc.so.6(clone+0x6D) [0x7f445d81141d]
-----  END BACKTRACE  -----

@y123456yz
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https://jira.mongodb.org/browse/SERVER-82688

@edzh edzh changed the title mongod crush， bug fix when connections > wiredtiger's session_max mongod crash, bug fix when connections > wiredtiger's session_max Nov 9, 2023
@kelly-cs
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kelly-cs commented Oct 3, 2025 •
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https://jira.mongodb.org/browse/SERVER-82688 is fixed in 8.2.0, closing

@kelly-cs kelly-cs closed this Oct 3, 2025
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@y123456yz @kelly-cs