This seems to happen on both mongos and mongod.
Here is an insert (non-FLE) that encounters a WriteConcernError (WCE). Note that n: 1 because the write went through, and the WCE is reported in the writeConcernError field.
{
"n" : 1,
"writeConcernError" : {
"code" : 100,
"codeName" : "UnsatisfiableWriteConcern",
"errmsg" : "UnsatisfiableWriteConcern: Not enough data-bearing nodes; Error details: { writeConcern: { w: 3, wtimeout: 0, provenance: \"clientSupplied\" } } at shard-rs0",
"errInfo" : {
}
},
"ok" : 1,
"$clusterTime" : {
"clusterTime" : Timestamp(1695160343, 1),
"signature" : {
"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
"keyId" : NumberLong(0)
}
},
"operationTime" : Timestamp(1695160343, 1)
}
When using FLE, the WCE is placed into the writeErrors field. I'm not sure how drivers would then interpret the error. Note that the write doesn't go through either (n: 0)
{
"n" : 0,
"opTime" : Timestamp(1695160105, 3),
"writeErrors" : [
{
"index" : 0,
"code" : 64,
"errmsg" : "Write concern error committing internal transaction :: caused by :: waiting for replication timed out; Error details: { wtimeout: true, writeConcern: { w: 2, wtimeout: 2000, provenance: \"clientSupplied\" } }"
}
],
"ok" : 1,
"$clusterTime" : {
"clusterTime" : Timestamp(1695160105, 7),
"signature" : {
"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
"keyId" : NumberLong(0)
}
},
"operationTime" : Timestamp(1695160105, 3)
}
This led me to wonder what happens when an actual error, like DuplicateKeyError shows up along with a WCE. The result is that the WCE is hidden (this is basically the bug from SERVER-78311):
{
"n" : 0,
"opTime" : Timestamp(1695221129, 11),
"writeErrors" : [
{
"index" : 0,
"code" : 11000,
"errmsg" : "E11000 duplicate key error collection: bulk_fle.basic index: _id_ dup key: { _id: 1.0 } found value: RecordId(1)",
"keyPattern" : {
"_id" : 1
},
"keyValue" : {
"_id" : 1
},
"foundValue" : NumberLong(1),
"duplicateRid" : NumberLong(1)
}
],
"ok" : 1,
"$clusterTime" : {
"clusterTime" : Timestamp(1695221129, 13),
"signature" : {
"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
"keyId" : NumberLong(0)
}
},
"operationTime" : Timestamp(1695221129, 11)
}
I'm looking to implement FLE + bulkWrite + WCE handling on mongos and I was looking into the existing behavior and that's when I found this.
- is depended on by
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SERVER-81280 Handle writeConcernErrors for FLE in bulkWrite
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- Blocked
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- is related to
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- Closed
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SERVER-86299 Test and fix FLE2 writeConcernError reporting in sharded writes
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- In Code Review
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- related to
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- Needs Scheduling
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- split to
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- In Progress
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