Start 1st MongoD on 27017: ➜ mongo git:(master) ✗ ./mongod --dbpath=/tmp/m0 --replSet=rs0 2015-07-08T14:27:47.973-0400 I - [initandlisten] Detected data files in /tmp/m0 created by the 'wiredTiger' storage engine, so setting the active storage engine to 'wiredTiger' . 2015-07-08T14:27:47.974-0400 I STORAGE [initandlisten] wiredtiger_open config: create,cache_size=18G,session_max=20000,eviction=(threads_max=4),statistics=(fast),log=(enabled= true ,archive= true ,path=journal,compressor=snappy),file_manager=(close_idle_time=100000),checkpoint=(wait=60,log_size=2GB),statistics_log=(wait=0), 2015-07-08T14:27:47.987-0400 I CONTROL [initandlisten] MongoDB starting : pid=5357 port=27017 dbpath=/tmp/m0 64-bit host=vader 2015-07-08T14:27:47.987-0400 I CONTROL [initandlisten] DEBUG build (which is slower) 2015-07-08T14:27:47.987-0400 I CONTROL [initandlisten] 2015-07-08T14:27:47.987-0400 I CONTROL [initandlisten] ** NOTE: This is a development version (3.1.6-pre-) of MongoDB. 2015-07-08T14:27:47.987-0400 I CONTROL [initandlisten] ** Not recommended for production. 2015-07-08T14:27:47.987-0400 I CONTROL [initandlisten] 2015-07-08T14:27:47.988-0400 I CONTROL [initandlisten] 2015-07-08T14:27:47.988-0400 I CONTROL [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/defrag is 'always' . 2015-07-08T14:27:47.988-0400 I CONTROL [initandlisten] ** We suggest setting it to 'never' 2015-07-08T14:27:47.988-0400 I CONTROL [initandlisten] 2015-07-08T14:27:47.988-0400 I CONTROL [initandlisten] db version v3.1.6-pre- 2015-07-08T14:27:47.988-0400 I CONTROL [initandlisten] git version: b057c6a2a2b65de10ba1720ec2c9ccd4a6ba40dc 2015-07-08T14:27:47.988-0400 I CONTROL [initandlisten] OpenSSL version: OpenSSL 1.0.1f 6 Jan 2014 2015-07-08T14:27:47.988-0400 I CONTROL [initandlisten] allocator: system 2015-07-08T14:27:47.988-0400 I CONTROL [initandlisten] options: { replication: { replSet: "rs0" }, storage: { dbPath: "/tmp/m0" } } 2015-07-08T14:27:47.989-0400 I REPL [initandlisten] Did not find local voted for document at startup; NoMatchingDocument Did not find replica set lastVote document in local.replset.election 2015-07-08T14:27:47.989-0400 I REPL [initandlisten] Did not find local replica set configuration document at startup; NoMatchingDocument Did not find replica set configuration document in local.system.replset 2015-07-08T14:27:47.990-0400 I NETWORK [initandlisten] waiting for connections on port 27017 Start second MongoD and observe fassert: mongo git:(master) ✗ ./mongod --dbpath=/tmp/m1 --replSet=rs1 2015-07-08T14:27:52.256-0400 E NETWORK [initandlisten] listen(): bind() failed errno:98 Address already in use for socket: 0.0.0.0:27017 2015-07-08T14:27:52.256-0400 E NETWORK [initandlisten] addr already in use 2015-07-08T14:27:52.256-0400 I - [initandlisten] Detected data files in /tmp/m1 created by the 'wiredTiger' storage engine, so setting the active storage engine to 'wiredTiger' . 2015-07-08T14:27:52.256-0400 W - [initandlisten] Detected unclean shutdown - /tmp/m1/mongod.lock is not empty. 2015-07-08T14:27:52.256-0400 W STORAGE [initandlisten] Recovering data from the last clean checkpoint. 2015-07-08T14:27:52.257-0400 I STORAGE [initandlisten] wiredtiger_open config: create,cache_size=18G,session_max=20000,eviction=(threads_max=4),statistics=(fast),log=(enabled= true ,archive= true ,path=journal,comp ressor=snappy),file_manager=(close_idle_time=100000),checkpoint=(wait=60,log_size=2GB),statistics_log=(wait=0), 2015-07-08T14:27:52.276-0400 I STORAGE [initandlisten] Starting WiredTigerRecordStoreThread local.oplog.rs 2015-07-08T14:27:52.280-0400 I CONTROL [initandlisten] MongoDB starting : pid=5403 port=27017 dbpath=/tmp/m1 64-bit host=vader 2015-07-08T14:27:52.280-0400 I CONTROL [initandlisten] DEBUG build (which is slower) 2015-07-08T14:27:52.280-0400 I CONTROL [initandlisten] 2015-07-08T14:27:52.280-0400 I CONTROL [initandlisten] ** NOTE: This is a development version (3.1.6-pre-) of MongoDB. 2015-07-08T14:27:52.280-0400 I CONTROL [initandlisten] ** Not recommended for production. 2015-07-08T14:27:52.280-0400 I CONTROL [initandlisten] 2015-07-08T14:27:52.280-0400 I CONTROL [initandlisten] 2015-07-08T14:27:52.280-0400 I CONTROL [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/defrag is 'always' . 2015-07-08T14:27:52.280-0400 I CONTROL [initandlisten] ** We suggest setting it to 'never' 2015-07-08T14:27:52.280-0400 I CONTROL [initandlisten] 2015-07-08T14:27:52.280-0400 I CONTROL [initandlisten] db version v3.1.6-pre- 2015-07-08T14:27:52.280-0400 I CONTROL [initandlisten] git version: b057c6a2a2b65de10ba1720ec2c9ccd4a6ba40dc 2015-07-08T14:27:52.280-0400 I CONTROL [initandlisten] OpenSSL version: OpenSSL 1.0.1f 6 Jan 2014 2015-07-08T14:27:52.280-0400 I CONTROL [initandlisten] allocator: system 2015-07-08T14:27:52.280-0400 I CONTROL [initandlisten] options: { replication: { replSet: "rs1" }, storage: { dbPath: "/tmp/m1" } } 2015-07-08T14:27:52.283-0400 I REPL [initandlisten] Did not find local voted for document at startup; NoMatchingDocument Did not find replica set lastVote document in local.replset.election 2015-07-08T14:27:52.284-0400 I - [initandlisten] Fatal Assertion 18823 2015-07-08T14:27:52.302-0400 I CONTROL [initandlisten] 0x21c6dd0 0x216768b 0x2150e69 0x1833c27 0x1dc26e5 0x1b4efcd 0x17c9375 0x17c8360 0x7fdca9af6ec5 0x17c49c9 ----- BEGIN BACKTRACE ----- { "backtrace" :[{ "b" : "400000" , "o" : "1DC6DD0" },{ "b" : "400000" , "o" : "1D6768B" },{ "b" : "400000" , "o" : "1D50E69" },{ "b" : "400000" , "o" : "1433C27" },{ "b" : "400000" , "o" : "19C26E5" },{ "b" : "400000" , "o" : "174EFCD" },{ "b" : "400000" , "o" :"13C9 375 "},{" b ":" 400000 "," o ":" 13C8360 "},{" b ":" 7FDCA9AD5000 "," o ":" 21EC5 "},{" b ":" 400000 "," o ":" 13C49C9 "}]," processInfo ":{ " mongodbVersion " : " 3.1.6-pre- ", " gitVersion " : " b057c6a2a2b65de10ba1720ec2c9ccd4a6ba40dc ", " comp iledModules " : [ " subscription " ], " uname " : { " sysname " : " Linux ", " release " : " 3.13.0-24- generic ", " version " : " #47-Ubuntu SMP Fri May 2 23:30:00 UTC 2014 ", " machine " : " x86_64 " }, " somap " : [ { " elfType" : 2, "b" : "400000" , "buildId" : "6DEB6ECFB8B5865794518B4E155564C232EE109C" }, { "b" : "7FFFDF8E0000" , "elfType" : 3, "buildId" : "6755FAD2CADACDF1667E5B57FF1EDFC28DD1C976" }, { "b" : "7FDCAC3A6000" , "path" : "/usr/ lib/x86_64-linux-gnu/libsasl2.so.2 ", " elfType " : 3, " buildId " : " 666B276BD134B0E9579B67D4EE333F2D0FB813CD " }, { " b " : " 7FDCAC160000 ", " path " : " /usr/lib/x86_64-linux-gnu/libgssapi_krb5.so.2 ", " elfType " : 3, " bui ldId " : " EEF6871CB80C0344DF907DD8B0D8C90A0B57D4F0 " }, { " b " : " 7FDCABCF3000 ", " path " : " /usr/lib/x86_64-linux-gnu/libnetsnmpmibs.so.30 ", " elfType " : 3, " buildId " : " B86A74A738862C45C6E7A4C5E694DD42155710D4" }, { "b" : "7FDCABAE4000" , "path" : "/usr/lib/x86_64-linux-gnu/libsensors.so.4" , "elfType" : 3, "buildId" : "859FDBFDD82F0EFDEB44A433D9D8020A232A35E2" }, { "b" : "7FDCAB8E0000" , "path" : "/lib/x86_64-linux-gnu/libdl .so.2 ", " elfType " : 3, " buildId " : " C1AE4CB7195D337A77A3C689051DABAA3980CA0C " }, { " b " : " 7FDCAB677000 ", " path " : " /usr/lib/x86_64-linux-gnu/libnetsnmpagent.so.30 ", " elfType " : 3, " buildId " : " 96C16FDBBA28C66356 57AFDBAF0F5A1090072474 " }, { " b " : " 7FDCAB46D000 ", " path " : " /lib/x86_64-linux-gnu/libwrap.so.0 ", " elfType " : 3, " buildId " : " 54FCBC5B0F994A13A9B0EAD46F23E7DA7F7FE75B " }, { " b " : " 7FDCAB193000 ", " path " : " /usr/l ib/x86_64-linux-gnu/libnetsnmp.so.30 ", " elfType " : 3, " buildId " : " 61AE85EF50A072D671D55B4776383F8365A3FAA7 " }, { " b " : " 7FDCAADB8000 ", " path " : " /lib/x86_64-linux-gnu/libcrypto.so.1.0.0 ", " elfType " : 3, " buildI d " : " F000D29917E9B6E94A35A8F02E5C62846E5916BC " }, { " b " : " 7FDCAAAB2000 ", " path " : " /lib/x86_64-linux-gnu/libm.so.6 ", " elfType " : 3, " buildId " : " 1D76B71E905CB867B27CEF230FCB20F01A3178F5 " }, { " b " : " 7FDCAA8530 00 ", " path " : " /lib/x86_64-linux-gnu/libssl.so.1.0.0 ", " elfType " : 3, " buildId " : " A20EFFEC993A8441FA17F2079F923CBD04079E19 " }, { " b " : " 7FDCAA64B000 ", " path " : " /lib/x86_64-linux-gnu/librt.so.1 ", " elfType" : 3, "buildId" : "92FCF41EFE012D6186E31A59AD05BDBB487769AB" }, { "b" : "7FDCAA2CF000" , "path" : "/usr/lib/x86_64-linux-gnu/libstdc++.so.6" , "elfType" : 3, "buildId" : "8F14AE1EAC77FB39AC09265C72F440E06C368CAE" }, { "b" : "7FDCAA0B8000" , "path" : "/lib/x86_64-linux-gnu/libgcc_s.so.1" , "elfType" : 3, "buildId" : "24E835F580B65BEE8AAF85A223EEA48604E978DD" }, { "b" : "7FDCA9E9A000" , "path" : "/lib/x86_64-linux-gnu/libpthread.s o.0 ", " elfType " : 3, " buildId " : " 9318E8AF0BFBE444731BB0461202EF57F7C39542 " }, { " b " : " 7FDCA9AD5000 ", " path " : " /lib/x86_64-linux-gnu/libc.so.6 ", " elfType " : 3, " buildId " : " 30C94DC66A1FE95180C3D68D2B89E576D5AE 213C " }, { " b " : " 7FDCAC5C1000 ", " path " : " /lib64/ld-linux-x86-64.so.2 ", " elfType " : 3, " buildId " : " 9F00581AB3C73E3AEA35995A0C50D24D59A01D47 " }, { " b " : " 7FDCA980A000 ", " path " : " /usr/lib/x86_64-linux-gnu/libkr b5.so.3 ", " elfType " : 3, " buildId " : " 00EB4BEB543C549A411AF26E8C2B4BBA806F57AE " }, { " b " : " 7FDCA95DB000 ", " path " : " /usr/lib/x86_64-linux-gnu/libk5crypto.so.3 ", " elfType " : 3, " buildId " : " 3057CF4B96D55B1CD2C36 81B2A1F75279F66F225 " }, { " b " : " 7FDCA93D7000 ", " path " : " /lib/x86_64-linux-gnu/libcom_err.so.2 ", " elfType " : 3, " buildId " : " 04BF7D9BE17AC2A5F7121B246488932718870207 " }, { " b " : " 7FDCA91CC000 ", " path " : " /usr/l ib/x86_64-linux-gnu/libkrb5support.so.0 ", " elfType " : 3, " buildId " : " 86E28C0FCF8D7DAEB9AE77A7C7930F4C2B78A64E " }, { " b " : " 7FDCA8E43000 ", " path " : " /usr/lib/libperl.so.5.18 ", " elfType " : 3, " buildId " : " FA1AD13 C56D51B69C9558106D8DAF14730B4C14F " }, { " b " : " 7FDCA8C29000 ", " path " : " /lib/x86_64-linux-gnu/libnsl.so.1 ", " elfType " : 3, " buildId " : " 497315006FCA1547A16E644FB7FEBA8BD2FAB054 " }, { " b " : " 7FDCA8A25000 ", " path" : "/lib/x86_64-linux-gnu/libkeyutils.so.1" , "elfType" : 3, "buildId" : "0F03635F97B93D3DACD84F0ED363C56BD266044F" }, { "b" : "7FDCA880A000" , "path" : "/lib/x86_64-linux-gnu/libresolv.so.2" , "elfType" : 3, "buil dId " : " 616683BCFD8626F176EDA99B6A5D4D2C57996590 " }, { " b " : " 7FDCA85D1000 ", " path " : " /lib/x86_64-linux-gnu/libcrypt.so.1 ", " elfType " : 3, " buildId " : " 1B0F2710E989E9A581C257DFFDC90085D0E1348A" } ] }} mongod(_ZN5mongo15printStackTraceERSo+0x27) [0x21c6dd0] mongod(_ZN5mongo10logContextEPKc+0x74) [0x216768b] mongod(_ZN5mongo13fassertFailedEi+0x66) [0x2150e69] mongod(_ZN5mongo7fassertEib+0x29) [0x1833c27] mongod(_ZN5mongo4repl26ReplicationCoordinatorImpl8shutdownEv+0xCB) [0x1dc26e5] mongod(_ZN5mongo11exitCleanlyENS_8ExitCodeE+0xCC) [0x1b4efcd] mongod(+0x13C9375) [0x17c9375] mongod(main+0x28) [0x17c8360] libc.so.6(__libc_start_main+0xF5) [0x7fdca9af6ec5] mongod(+0x13C49C9) [0x17c49c9] ----- END BACKTRACE ----- 2015-07-08T14:27:52.302-0400 I - [initandlisten] ***aborting after fassert() failure