Details
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Bug
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Resolution: Works as Designed
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Major - P3
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None
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ALL
Description
The common oplog format for update operation is like this, has `o.$set` field:
{"ts":Timestamp(1521530692,1),"t":NumberLong("5"),"h":NumberLong("-384939294837368966"), "v":2,"op":"u","ns":"foo.bar","o2":{"_id":"L0KB$fjfLFra"},"o":{"$set":{"apns":"[]"}}} |
but after some times (around 2.1M log entries now), there exists one log:
db.getCollection("oplog.rs").find({op: 'u', 'o.$set': { $exists: false}}) |

is this a bug?