Major - P3 We suffered a VM crash that housed a non replicated MongoDB server. I haven't been able to recover any of the data, using various steps found on JIRA (and StackOverflow). My best guess at this point is that the WiredTiger.wt got corrupted, so we can't start up the server.
It seems VERY similar to this issue: https://jira.mongodb.org/browse/SERVER-31124?focusedCommentId=1675509&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-1675509
I'm hoping you guys can help! I've attached the MongoDB folder & also the output of the startup attempt.
2017-11-20T08:28:20.180+0200 I CONTROL [initandlisten] MongoDB starting : pid=25121 port=27017 dbpath=/var/lib/mongodb/ 64-bit host=hc-dbn-vps01_old 2017-11-20T08:28:20.180+0200 I CONTROL [initandlisten] db version v3.2.16 2017-11-20T08:28:20.181+0200 I CONTROL [initandlisten] git version: 056bf45128114e44c5358c7a8776fb582363e094 2017-11-20T08:28:20.181+0200 I CONTROL [initandlisten] OpenSSL version: OpenSSL 1.0.2g 1 Mar 2016 2017-11-20T08:28:20.181+0200 I CONTROL [initandlisten] allocator: tcmalloc 2017-11-20T08:28:20.181+0200 I CONTROL [initandlisten] modules: none 2017-11-20T08:28:20.181+0200 I CONTROL [initandlisten] build environment: 2017-11-20T08:28:20.181+0200 I CONTROL [initandlisten] distmod: ubuntu1604 2017-11-20T08:28:20.181+0200 I CONTROL [initandlisten] distarch: x86_64 2017-11-20T08:28:20.182+0200 I CONTROL [initandlisten] target_arch: x86_64 2017-11-20T08:28:20.182+0200 I CONTROL [initandlisten] options: { repair: true, storage: { dbPath: "/var/lib/mongodb/", engine: "wiredTiger" } } 2017-11-20T08:28:20.220+0200 I STORAGE [initandlisten] Detected WT journal files. Running recovery from last checkpoint. 2017-11-20T08:28:20.220+0200 I STORAGE [initandlisten] journal to nojournal transition config: create,cache_size=1G,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), 2017-11-20T08:28:20.230+0200 E STORAGE [initandlisten] WiredTiger (-31802) [1511159300:229985][25121:0x7f7ce23f0c80], file:WiredTiger.wt, connection: unable to read root page from file:WiredTiger.wt: WT_ERROR: non-specific WiredTiger error 2017-11-20T08:28:20.230+0200 E STORAGE [initandlisten] WiredTiger (0) [1511159300:230288][25121:0x7f7ce23f0c80], file:WiredTiger.wt, connection: WiredTiger has failed to open its metadata 2017-11-20T08:28:20.230+0200 E STORAGE [initandlisten] WiredTiger (0) [1511159300:230475][25121:0x7f7ce23f0c80], file:WiredTiger.wt, connection: This may be due to the database files being encrypted, being from an older version or due to corruption on disk 2017-11-20T08:28:20.230+0200 E STORAGE [initandlisten] WiredTiger (0) [1511159300:230657][25121:0x7f7ce23f0c80], file:WiredTiger.wt, connection: You should confirm that you have opened the database with the correct options including all encryption and compression options 2017-11-20T08:28:20.231+0200 I - [initandlisten] Assertion: 28718:-31802: WT_ERROR: non-specific WiredTiger error 2017-11-20T08:28:20.231+0200 I STORAGE [initandlisten] exception in initAndListen: 28718 -31802: WT_ERROR: non-specific WiredTiger error, terminating 2017-11-20T08:28:20.232+0200 I CONTROL [initandlisten] dbexit: rc: 100