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Type:
Question
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Resolution: Done
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Priority:
Major - P3
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None
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Affects Version/s: 3.2.19
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Component/s: WiredTiger
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None
Hello,
I figured I'd start by posting this as a question, perhaps later it can be upgraded to a bug.
First some background information. I am running the v3.2.19 version of Mongo via docker as a DB for rocketchat which is also containerized. I have the mongodb data directory bind mounted into the container via docker. I have a node running with 8 gbs of ram on ubuntu 16.04. The database is using WiredTiger as it's backend. I have the rocketchat instance up and running, the db is writeable and everything seems to function fine. However roughly every 20 mins or so the mongo container crashes with the following output.
2018-02-13T16:16:40.756+0000 E STORAGE [thread1] WiredTiger (13) [1518538600:756646][1:0x7f4e7f26d700], file:WiredTiger.wt, WT_SESSION.checkpoint: /data/db/WiredTiger.turtle.set: handle-open: open: Permission denied
2018-02-13T16:16:40.757+0000 E STORAGE [thread1] WiredTiger (13) [1518538600:757215][1:0x7f4e7f26d700], checkpoint-server: checkpoint server error: Permission denied
2018-02-13T16:16:40.757+0000 E STORAGE [thread1] WiredTiger (-31804) [1518538600:757846][1:0x7f4e7f26d700], checkpoint-server: the process must exit and restart: WT_PANIC: WiredTiger library panic
2018-02-13T16:16:40.758+0000 I - [thread1] Fatal Assertion 28558
2018-02-13T16:16:40.758+0000 I - [thread1]
***aborting after fassert() failure
2018-02-13T16:16:40.795+0000 F - [thread1] Got signal: 6 (Aborted).
0x1357642 0x1356779 0x1356f82 0x7f4e83e31890 0x7f4e83aac067 0x7f4e83aad448 0x12d74b2 0x10ca4e3 0x9789eb 0x978be8 0x978dac 0x1a3fae3 0x7f4e83e2a064 0x7f4e83b5f62d
----- BEGIN BACKTRACE -----
{"backtrace":[{"b":"400000","o":"F57642","s":"_ZN5mongo15printStackTraceERSo"},{"b":"400000","o":"F56779"},{"b":"400000","o":"F56F82"},{"b":"7F4E83E22000","o":"F890"},{"b":"7F4E83A77000","o":"35067","s":"gsignal"},{"b":"7F4E83A77000","o":"36448","s":"abort"},{"b":"400000","o":"ED74B2","s":"_ZN5mongo13fassertFailedEi"},{"b":"400000","o":"CCA4E3"},{"b":"400000","o":"5789EB","s":"__wt_eventv"},{"b":"400000","o":"578BE8","s":"__wt_err"},{"b":"400000","o":"578DAC","s":"__wt_panic"},{"b":"400000","o":"163FAE3"},{"b":"7F4E83E22000","o":"8064"},{"b":"7F4E83A77000","o":"E862D","s":"clone"}],"processInfo":{ "mongodbVersion" : "3.2.19", "gitVersion" : "a9f574de6a566a58b24d126b44a56718d181e989", "compiledModules" : [], "uname" : { "sysname" : "Linux", "release" : "4.4.0-112-generic", "version" : "#135-Ubuntu SMP Fri Jan 19 11:48:36 UTC 2018", "machine" : "x86_64" }, "somap" : [ { "elfType" : 2, "b" : "400000", "buildId" : "EB76513EC468515CD544A7D421C9AB0C2C3EC848" }, { "b" : "7FFC8395C000", "path" : "linux-vdso.so.1", "elfType" : 3, "buildId" : "FA97F4849697BBE252BA1F7FB2316979E93E61DE" }, { "b" : "7F4E84D5E000", "path" : "/usr/lib/x86_64-linux-gnu/libssl.so.1.0.0", "elfType" : 3, "buildId" : "21115992A1F885E1ACE88AADA60F126AD9759D03" }, { "b" : "7F4E84962000", "path" : "/usr/lib/x86_64-linux-gnu/libcrypto.so.1.0.0", "elfType" : 3, "buildId" : "FD6376149047833953B0269E84DE181CA45DBE90" }, { "b" : "7F4E8475A000", "path" : "/lib/x86_64-linux-gnu/librt.so.1", "elfType" : 3, "buildId" : "A63C95FB33CCA970E141D2E13774B997C1CF0565" }, { "b" : "7F4E84556000", "path" : "/lib/x86_64-linux-gnu/libdl.so.2", "elfType" : 3, "buildId" : "D70B531D672A34D71DB42EB32B68E63F2DCC5B6A" }, { "b" : "7F4E84255000", "path" : "/lib/x86_64-linux-gnu/libm.so.6", "elfType" : 3, "buildId" : "152C93BA3E8590F7ED0BCDDF868600D55EC4DD6F" }, { "b" : "7F4E8403F000", "path" : "/lib/x86_64-linux-gnu/libgcc_s.so.1", "elfType" : 3, "buildId" : "D5FB04F64B3DAEA6D6B68B5E8B9D4D2BC1A6E1FC" }, { "b" : "7F4E83E22000", "path" : "/lib/x86_64-linux-gnu/libpthread.so.0", "elfType" : 3, "buildId" : "9DA9387A60FFC196AEDB9526275552AFEF499C44" }, { "b" : "7F4E83A77000", "path" : "/lib/x86_64-linux-gnu/libc.so.6", "elfType" : 3, "buildId" : "48C48BC6ABB794461B8A558DD76B29876A0551F0" }, { "b" : "7F4E84FBF000", "path" : "/lib64/ld-linux-x86-64.so.2", "elfType" : 3, "buildId" : "1D98D41FBB1EABA7EC05D0FD7624B85D6F51C03C" } ] }}
mongod(_ZN5mongo15printStackTraceERSo+0x32) [0x1357642]
mongod(+0xF56779) [0x1356779]
mongod(+0xF56F82) [0x1356f82]
libpthread.so.0(+0xF890) [0x7f4e83e31890]
libc.so.6(gsignal+0x37) [0x7f4e83aac067]
libc.so.6(abort+0x148) [0x7f4e83aad448]
mongod(_ZN5mongo13fassertFailedEi+0x82) [0x12d74b2]
mongod(+0xCCA4E3) [0x10ca4e3]
mongod(__wt_eventv+0x440) [0x9789eb]
mongod(__wt_err+0x8D) [0x978be8]
mongod(__wt_panic+0x24) [0x978dac]
mongod(+0x163FAE3) [0x1a3fae3]
libpthread.so.0(+0x8064) [0x7f4e83e2a064]
libc.so.6(clone+0x6D) [0x7f4e83b5f62d]
----- END BACKTRACE -----
It seems obvious that this may be a permission issue, however I have verified that within the container the ownership both group and user of the data dir are mongodb and I can easily touch and delete files within as that user. I have noticed that the file WiredTiger.turtle.set does not exist in the directory. Not sure what else I should be poking at or trying to resolve this. Any pointers would be greatly appreciated.