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Type:
Bug
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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: 3.0.0
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Component/s: Storage, WiredTiger
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Labels:
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Fully Compatible
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ALL
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Problem
Have an NFS mount on a Linux machine
10.5.0.132:/vol/harpoon /data-nfs nfs lock,rw,bg,hard,nointr,rsize=32768,wsize=32768,suid,tcp,timeo=600,noatime 0 0
The process running mongodb can create files etc. just ok. However, on startup get the following errors in the log
2015-03-05T15:30:01.307-0800 I CONTROL [initandlisten] MongoDB starting : pid=29103 port=27017 dbpath=/data-nfs/db 64-bit host=bismark
2015-03-05T15:30:01.307-0800 I CONTROL [initandlisten] db version v3.0.0
2015-03-05T15:30:01.307-0800 I CONTROL [initandlisten] git version: a841fd6394365954886924a35076691b4d149168
2015-03-05T15:30:01.307-0800 I CONTROL [initandlisten] build info: Linux build15.nj1.10gen.cc 2.6.32-431.3.1.el6.x86_64 #1 SMP Fri Jan 3 21:39:27 UTC 2014 x86_64 BOOST_LIB_VERSION=1_49
2015-03-05T15:30:01.307-0800 I CONTROL [initandlisten] allocator: tcmalloc
2015-03-05T15:30:01.307-0800 I CONTROL [initandlisten] options: { net: { bindIp: "127.0.0.1" }, processManagement: { fork: true }, storage: { dbPath: "/data-nfs/db", engine: "wiredTiger", syncPeriodSecs:
14400.0 }, systemLog: { destination: "file", path: "/data3/logs/db/server.log" } }
2015-03-05T15:30:01.338-0800 I STORAGE [initandlisten] wiredtiger_open config: create,cache_size=15G,session_max=20000,eviction=(threads_max=4),statistics=(fast),log=(enabled=true,archive=true,path=journ
al,compressor=snappy),checkpoint=(wait=14400,log_size=2GB),statistics_log=(wait=0),
2015-03-05T15:30:01.339-0800 E STORAGE [initandlisten] WiredTiger (16) [1425598201:339229][29103:0x7ffff7fddb80], wiredtiger_open: WiredTiger database is already being managed by another process: Device
or resource busy
2015-03-05T15:30:01.339-0800 I - [initandlisten] Assertion: 28595:16: Device or resource busy
2015-03-05T15:30:01.340-0800 I STORAGE [initandlisten] exception in initAndListen: 28595 16: Device or resource busy, terminating
2015-03-05T15:30:01.340-0800 I CONTROL [initandlisten] dbexit: rc: 100
This comes from https://github.com/mongodb/mongo/blob/v3.0/src/third_party/wiredtiger/src/conn/conn_api.c#L1164
WT_ERR(__wt_open(session, WT_SINGLETHREAD, 1, 0, 0, &conn->lock_fh)); /* * Lock a byte of the file: if we don't get the lock, some other process * is holding it, we're done. The file may be zero-length, and that's * OK, the underlying call supports locking past the end-of-file. */ if (__wt_bytelock(conn->lock_fh, (wt_off_t)0, 1) != 0) WT_ERR_MSG(session, EBUSY, "WiredTiger database is already being managed by another " "process");
Several file had been created in this directory before the process terminated
ls -l /data-nfs/db/ total 4 drwxr-xr-x 2 nobody nogroup 4096 Dec 31 1969 journal -rwxr-xr-x 1 nobody nogroup 0 Dec 31 1969 mongod.lock -rw-r--r-- 1 nobody nogroup 0 Dec 31 1969 WiredTiger.lock