Details
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Bug
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Status: Closed
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Major - P3
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Resolution: Works as Designed
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3.0.0
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None
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Fully Compatible
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ALL
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Description
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
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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
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2015-03-05T15:30:01.307-0800 I CONTROL [initandlisten] db version v3.0.0
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2015-03-05T15:30:01.307-0800 I CONTROL [initandlisten] git version: a841fd6394365954886924a35076691b4d149168
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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
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2015-03-05T15:30:01.307-0800 I CONTROL [initandlisten] allocator: tcmalloc
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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:
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14400.0 }, systemLog: { destination: "file", path: "/data3/logs/db/server.log" } }
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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
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al,compressor=snappy),checkpoint=(wait=14400,log_size=2GB),statistics_log=(wait=0),
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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
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or resource busy
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2015-03-05T15:30:01.339-0800 I - [initandlisten] Assertion: 28595:16: Device or resource busy
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2015-03-05T15:30:01.340-0800 I STORAGE [initandlisten] exception in initAndListen: 28595 16: Device or resource busy, terminating
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2015-03-05T15:30:01.340-0800 I CONTROL [initandlisten] dbexit: rc: 100
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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));
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/*
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* Lock a byte of the file: if we don't get the lock, some other process
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* is holding it, we're done. The file may be zero-length, and that's
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* OK, the underlying call supports locking past the end-of-file.
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*/
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if (__wt_bytelock(conn->lock_fh, (wt_off_t)0, 1) != 0)
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WT_ERR_MSG(session, EBUSY,
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"WiredTiger database is already being managed by another "
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"process");
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Several file had been created in this directory before the process terminated
ls -l /data-nfs/db/
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total 4
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drwxr-xr-x 2 nobody nogroup 4096 Dec 31 1969 journal
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-rwxr-xr-x 1 nobody nogroup 0 Dec 31 1969 mongod.lock
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-rw-r--r-- 1 nobody nogroup 0 Dec 31 1969 WiredTiger.lock
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