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Some logging leaks into the dump when using mongodump with "--dbpath" and "--out -" options. For example: $ sudo service mongodb stop mongodb stop/waiting $ sudo -u mongodb mongodump --dbpath /var/lib/mongodb/ -d datahub -c users --out - | dd bs=1M count=10 iflag=fullblock of=users.bson 10+0 records in 10+0 records out 10485760 bytes (10 MB) copied, 2.66285 s, 3.9 MB/s $ grep -a -F 'Wed Sep 25' users.bson # here grep outputs some logging statements intermixed with bson data File users.bson is attached (it is a bunch of public data from one social network), so you can inspect it yourselves.
xgen-internal-githook commented on Wed, 27 Nov 2013 16:36:20 +0000: Author: {u'username': u'Zarkantho', u'name': u'Shaun Verch', u'email': u'shaun.verch@10gen.com'} Message: SERVER-10886 Create function to override rawOut destination stream to avoid corrupting tool output Branch: master https://github.com/mongodb/mongo/commit/1a78c32529cd9378479170b7577b1eb2509c61ca samantha.ritter@10gen.com commented on Tue, 29 Oct 2013 20:54:24 +0000: > mongodump --db digg --collection stories --dbpath /data/db --out - > foo if there is data being written, it will be corrupted by a "dbexit" message that is logged by the dbexit function. This message should be suppressed, or re-routed to stderr.
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