Details
Major - P3 Description
sh.status was showing a successful migration when there weren't any and I tried it down to this function sh.getRecentMigrations() reporting this as success:
db.changelog.aggregate( [ { $match : { time : { $gt : yesterday }, what : "moveChunk.from", "details.errmsg" : { "$exists" : false } } }]).toArray()
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[
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{
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"_id" : "tugc2.mongodb.com-2015-01-22T01:20:49-54c050716fa2c02a2608c1f5",
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"server" : "tugc2.mongodb.com",
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"clientAddr" : "50.23.195.163:56685",
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"time" : ISODate("2015-01-22T01:20:49.565Z"),
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"what" : "moveChunk.from",
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"ns" : "ycsb.usertable",
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"details" : {
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"min" : {
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"_id" : { "$minKey" : 1 }
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},
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"max" : {
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"_id" : NumberLong("-3074457345618258602")
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},
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"step 1 of 6" : 0,
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"step 2 of 6" : 31,
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"step 3 of 6" : 4,
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"to" : "ycsbTest1",
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"from" : "ycsbTest2",
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"note" : "aborted"
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}
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}
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]
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Clearly aborted != success. For inexplicable reasons it's looking for "errmsg" in "moveChunk.from" - rather than "details.note":"aborted" or something in the new actionlog?