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OPERATIONAL DEFECT DATABASE
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I created a 3.6.0-rc0 node, shut it down, and tried to bring it back up as 3.4.9. If this is not supported we need clear documentation around it: 2017-10-15T11:14:30.203-0400 I CONTROL [initandlisten] MongoDB starting : pid=20923 port=27017 dbpath=/home/rf/tmp/SERVER-31574/data/db 64-bit host=tab 2017-10-15T11:14:30.203-0400 I CONTROL [initandlisten] db version v3.6.0-rc0 2017-10-15T11:14:30.203-0400 I CONTROL [initandlisten] git version: 96dfbfbb8cfc35640034b189ba58fef43751319e 2017-10-15T11:14:30.203-0400 I CONTROL [initandlisten] allocator: tcmalloc 2017-10-15T11:14:30.203-0400 I CONTROL [initandlisten] modules: none 2017-10-15T11:14:30.203-0400 I CONTROL [initandlisten] build environment: 2017-10-15T11:14:30.203-0400 I CONTROL [initandlisten] distarch: x86_64 2017-10-15T11:14:30.203-0400 I CONTROL [initandlisten] target_arch: x86_64 2017-10-15T11:14:30.203-0400 I CONTROL [initandlisten] options: { net: { port: 27017 }, processManagement: { fork: true }, storage: { dbPath: "/home/rf/tmp/SERVER-31574/data/db" }, systemLog: { destination: "file", logAppend: true, path: "/home/rf/tmp/SERVER-31574/data/mongod.log" } } 2017-10-15T11:14:30.203-0400 I STORAGE [initandlisten] 2017-10-15T11:14:30.203-0400 I STORAGE [initandlisten] ** WARNING: Using the XFS filesystem is strongly recommended with the WiredTiger storage engine 2017-10-15T11:14:30.203-0400 I STORAGE [initandlisten] ** See http://dochub.mongodb.org/core/prodnotes-filesystem 2017-10-15T11:14:30.203-0400 I STORAGE [initandlisten] wiredtiger_open config: create,cache_size=31684M,session_max=20000,eviction=(threads_min=4,threads_max=4),config_base=false,statistics=(fast),log=(enabled=true,archive=true,path=journal,compressor=snappy),file_manager=(close_idle_time=100000),statistics_log=(wait=0),verbose=(recovery_progress), 2017-10-15T11:14:30.312-0400 I CONTROL [initandlisten] 2017-10-15T11:14:30.312-0400 I CONTROL [initandlisten] ** WARNING: Access control is not enabled for the database. 2017-10-15T11:14:30.312-0400 I CONTROL [initandlisten] ** Read and write access to data and configuration is unrestricted. 2017-10-15T11:14:30.312-0400 I CONTROL [initandlisten] 2017-10-15T11:14:30.312-0400 I CONTROL [initandlisten] ** WARNING: This server is bound to localhost. 2017-10-15T11:14:30.312-0400 I CONTROL [initandlisten] ** Remote systems will be unable to connect to this server. 2017-10-15T11:14:30.312-0400 I CONTROL [initandlisten] ** Start the server with --bind_ip to specify which IP 2017-10-15T11:14:30.312-0400 I CONTROL [initandlisten] ** addresses it should serve responses from, or with --bind_ip_all to 2017-10-15T11:14:30.312-0400 I CONTROL [initandlisten] ** bind to all interfaces. If this behavior is desired, start the 2017-10-15T11:14:30.312-0400 I CONTROL [initandlisten] ** server with --bind_ip 127.0.0.1 to disable this warning. 2017-10-15T11:14:30.312-0400 I CONTROL [initandlisten] 2017-10-15T11:14:30.313-0400 I STORAGE [initandlisten] createCollection: admin.system.version with UUID: 4f8c77af-da87-4c93-8634-4647cb1876d9 2017-10-15T11:14:30.339-0400 I COMMAND [initandlisten] setting featureCompatibilityVersion to 3.6 2017-10-15T11:14:30.346-0400 I STORAGE [initandlisten] createCollection: local.startup_log with UUID: 60dbcb39-5fff-47f8-b057-4e371ff63901 2017-10-15T11:14:30.372-0400 I FTDC [initandlisten] Initializing full-time diagnostic data capture with directory '/home/rf/tmp/SERVER-31574/data/db/diagnostic.data' 2017-10-15T11:14:30.372-0400 I NETWORK [initandlisten] waiting for connections on port 27017 2017-10-15T11:14:30.376-0400 I NETWORK [listener] connection accepted from 127.0.0.1:59682 #1 (1 connection now open) 2017-10-15T11:14:30.376-0400 I NETWORK [conn1] received client metadata from 127.0.0.1:59682 conn: { driver: { name: "PyMongo", version: "3.4.0" }, os: { type: "Linux", name: "Ubuntu 16.04 xenial", architecture: "x86_64", version: "4.4.0-93-generic" }, platform: "CPython 2.7.12.final.0" } 2017-10-15T11:14:30.377-0400 I NETWORK [listener] connection accepted from 127.0.0.1:59684 #2 (2 connections now open) 2017-10-15T11:14:30.377-0400 I NETWORK [conn2] received client metadata from 127.0.0.1:59684 conn: { driver: { name: "PyMongo", version: "3.4.0" }, os: { type: "Linux", name: "Ubuntu 16.04 xenial", architecture: "x86_64", version: "4.4.0-93-generic" }, platform: "CPython 2.7.12.final.0" } 2017-10-15T11:14:30.377-0400 I NETWORK [conn2] end connection 127.0.0.1:59684 (1 connection now open) 2017-10-15T11:14:30.377-0400 I NETWORK [conn1] end connection 127.0.0.1:59682 (0 connections now open) 2017-10-15T11:14:30.379-0400 I NETWORK [listener] connection accepted from 127.0.0.1:59686 #3 (1 connection now open) 2017-10-15T11:14:30.379-0400 I NETWORK [conn3] received client metadata from 127.0.0.1:59686 conn: { driver: { name: "PyMongo", version: "3.4.0" }, os: { type: "Linux", name: "Ubuntu 16.04 xenial", architecture: "x86_64", version: "4.4.0-93-generic" }, platform: "CPython 2.7.12.final.0" } 2017-10-15T11:14:30.380-0400 I NETWORK [listener] connection accepted from 127.0.0.1:59688 #4 (2 connections now open) 2017-10-15T11:14:30.380-0400 I NETWORK [conn4] received client metadata from 127.0.0.1:59688 conn: { driver: { name: "PyMongo", version: "3.4.0" }, os: { type: "Linux", name: "Ubuntu 16.04 xenial", architecture: "x86_64", version: "4.4.0-93-generic" }, platform: "CPython 2.7.12.final.0" } 2017-10-15T11:14:30.380-0400 I NETWORK [conn4] end connection 127.0.0.1:59688 (1 connection now open) 2017-10-15T11:14:30.380-0400 I NETWORK [conn3] end connection 127.0.0.1:59686 (0 connections now open) 2017-10-15T11:14:32.000-0400 I NETWORK [listener] connection accepted from 127.0.0.1:59690 #5 (1 connection now open) 2017-10-15T11:14:32.000-0400 I NETWORK [conn5] received client metadata from 127.0.0.1:59690 conn: { application: { name: "MongoDB Shell" }, driver: { name: "MongoDB Internal Client", version: "3.6.0-rc0" }, os: { type: "Linux", name: "Ubuntu", architecture: "x86_64", version: "16.04" } } 2017-10-15T11:14:37.305-0400 I NETWORK [conn5] end connection 127.0.0.1:59690 (0 connections now open) 2017-10-15T11:14:39.458-0400 I NETWORK [listener] connection accepted from 127.0.0.1:59692 #6 (1 connection now open) 2017-10-15T11:14:39.459-0400 I NETWORK [conn6] received client metadata from 127.0.0.1:59692 conn: { driver: { name: "PyMongo", version: "3.4.0" }, os: { type: "Linux", name: "Ubuntu 16.04 xenial", architecture: "x86_64", version: "4.4.0-93-generic" }, platform: "CPython 2.7.12.final.0" } 2017-10-15T11:14:39.460-0400 I NETWORK [listener] connection accepted from 127.0.0.1:59694 #7 (2 connections now open) 2017-10-15T11:14:39.460-0400 I NETWORK [conn7] received client metadata from 127.0.0.1:59694 conn: { driver: { name: "PyMongo", version: "3.4.0" }, os: { type: "Linux", name: "Ubuntu 16.04 xenial", architecture: "x86_64", version: "4.4.0-93-generic" }, platform: "CPython 2.7.12.final.0" } 2017-10-15T11:14:39.460-0400 I NETWORK [conn7] end connection 127.0.0.1:59694 (1 connection now open) 2017-10-15T11:14:39.461-0400 I NETWORK [conn6] end connection 127.0.0.1:59692 (0 connections now open) 2017-10-15T11:14:39.488-0400 I CONTROL [signalProcessingThread] got signal 15 (Terminated), will terminate after current cmd ends 2017-10-15T11:14:39.488-0400 I NETWORK [signalProcessingThread] shutdown: going to close listening sockets... 2017-10-15T11:14:39.488-0400 I FTDC [signalProcessingThread] Shutting down full-time diagnostic data capture 2017-10-15T11:14:39.491-0400 I STORAGE [signalProcessingThread] WiredTigerKVEngine shutting down 2017-10-15T11:14:39.589-0400 I NETWORK [listener] connection accepted from 127.0.0.1:59696 #8 (1 connection now open) 2017-10-15T11:14:39.591-0400 I NETWORK [conn8] end connection 127.0.0.1:59696 (0 connections now open) 2017-10-15T11:14:39.653-0400 I STORAGE [signalProcessingThread] shutdown: removing fs lock... 2017-10-15T11:14:39.653-0400 I CONTROL [signalProcessingThread] now exiting 2017-10-15T11:14:39.653-0400 I CONTROL [signalProcessingThread] shutting down with code:0 2017-10-15T11:14:43.951-0400 I CONTROL [main] ***** SERVER RESTARTED ***** 2017-10-15T11:14:43.955-0400 I CONTROL [initandlisten] MongoDB starting : pid=20997 port=27017 dbpath=/home/rf/tmp/SERVER-31574/data/db 64-bit host=tab 2017-10-15T11:14:43.955-0400 I CONTROL [initandlisten] db version v3.4.9 2017-10-15T11:14:43.955-0400 I CONTROL [initandlisten] git version: 876ebee8c7dd0e2d992f36a848ff4dc50ee6603e 2017-10-15T11:14:43.955-0400 I CONTROL [initandlisten] allocator: tcmalloc 2017-10-15T11:14:43.955-0400 I CONTROL [initandlisten] modules: none 2017-10-15T11:14:43.955-0400 I CONTROL [initandlisten] build environment: 2017-10-15T11:14:43.955-0400 I CONTROL [initandlisten] distarch: x86_64 2017-10-15T11:14:43.955-0400 I CONTROL [initandlisten] target_arch: x86_64 2017-10-15T11:14:43.955-0400 I CONTROL [initandlisten] options: { net: { port: 27017 }, processManagement: { fork: true }, storage: { dbPath: "/home/rf/tmp/SERVER-31574/data/db" }, systemLog: { destination: "file", logAppend: true, path: "/home/rf/tmp/SERVER-31574/data/mongod.log" } } 2017-10-15T11:14:43.971-0400 I - [initandlisten] Detected data files in /home/rf/tmp/SERVER-31574/data/db created by the 'wiredTiger' storage engine, so setting the active storage engine to 'wiredTiger'. 2017-10-15T11:14:43.971-0400 I STORAGE [initandlisten] 2017-10-15T11:14:43.971-0400 I STORAGE [initandlisten] ** WARNING: Using the XFS filesystem is strongly recommended with the WiredTiger storage engine 2017-10-15T11:14:43.971-0400 I STORAGE [initandlisten] ** See http://dochub.mongodb.org/core/prodnotes-filesystem 2017-10-15T11:14:43.971-0400 I STORAGE [initandlisten] wiredtiger_open config: create,cache_size=31684M,session_max=20000,eviction=(threads_min=4,threads_max=4),config_base=false,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), 2017-10-15T11:14:43.988-0400 E STORAGE [initandlisten] WiredTiger error (-31802) [1508080483:987995][20997:0x7ff723339d00], txn-recover: unsupported WiredTiger file version: this build only supports major/minor versions up to 1/0, and the file is version 2/0: WT_ERROR: non-specific WiredTiger error 2017-10-15T11:14:43.988-0400 E STORAGE [initandlisten] WiredTiger error (0) [1508080483:988038][20997:0x7ff723339d00], txn-recover: WiredTiger is unable to read the recovery log. 2017-10-15T11:14:43.988-0400 E STORAGE [initandlisten] WiredTiger error (0) [1508080483:988051][20997:0x7ff723339d00], txn-recover: This may be due to the log files being encrypted, being from an older version or due to corruption on disk 2017-10-15T11:14:43.988-0400 E STORAGE [initandlisten] WiredTiger error (0) [1508080483:988063][20997:0x7ff723339d00], txn-recover: You should confirm that you have opened the database with the correct options including all encryption and compression options 2017-10-15T11:14:43.988-0400 E STORAGE [initandlisten] WiredTiger error (-31802) [1508080483:988080][20997:0x7ff723339d00], txn-recover: Recovery failed: WT_ERROR: non-specific WiredTiger error 2017-10-15T11:14:43.992-0400 I - [initandlisten] Assertion: 28595:-31802: WT_ERROR: non-specific WiredTiger error src/mongo/db/storage/wiredtiger/wiredtiger_kv_engine.cpp 269 2017-10-15T11:14:43.993-0400 I STORAGE [initandlisten] exception in initAndListen: 28595 -31802: WT_ERROR: non-specific WiredTiger error, terminating 2017-10-15T11:14:43.993-0400 I NETWORK [initandlisten] shutdown: going to close listening sockets... 2017-10-15T11:14:43.993-0400 I NETWORK [initandlisten] removing socket file: /tmp/mongodb-27017.sock 2017-10-15T11:14:43.993-0400 I NETWORK [initandlisten] shutdown: going to flush diaglog... 2017-10-15T11:14:43.993-0400 I CONTROL [initandlisten] now exiting 2017-10-15T11:14:43.993-0400 I CONTROL [initandlisten] shutting down with code:100
ramon.fernandez commented on Sun, 15 Oct 2017 15:36:13 +0000: Thanks Max, pilot error – this is indeed documented (and I was running the command on the wrong server). max.hirschhorn@10gen.com commented on Sun, 15 Oct 2017 15:27:10 +0000: ramon.fernandez, when you start a server with a fresh dbpath, the featureCompatibilityVersion will default to 3.6. You'd need to set the featureCompatibilityVersion to 3.4 in order to be able to downgrade. On shutdown, WiredTiger downgrade its files to a format compatibility with MongoDB 3.4. 2017-10-15T11:22:54.752-0400 I STORAGE [signalProcessingThread] WiredTigerKVEngine shutting down 2017-10-15T11:22:54.843-0400 I STORAGE [signalProcessingThread] Downgrading files to FCV 3.4 2017-10-15T11:22:55.352-0400 I STORAGE [signalProcessingThread] WiredTiger message [1508080975:352661][12052:0x700000081000], txn-recover: Main recovery loop: starting at 1/14336 2017-10-15T11:22:55.469-0400 I STORAGE [signalProcessingThread] WiredTiger message [1508080975:469750][12052:0x700000081000], txn-recover: Recovering log 1 through 2 2017-10-15T11:22:55.545-0400 I STORAGE [signalProcessingThread] WiredTiger message [1508080975:545663][12052:0x700000081000], txn-recover: Recovering log 2 through 2
Start a 3.6.0-rc0 node with a fresh dbpath Shut it down Try to start the node with 3.4.9