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Type:
Improvement
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Resolution: Unresolved
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Priority:
Minor - P4
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None
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Affects Version/s: 4.4.2, 4.9.0-alpha4
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Component/s: None
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Server Programmability
When I perform an insert that fails due to unique index violation, mongod does not return error code name but mongos does.
Test program:
require 'mongo' require 'byebug' def test(port) client = Mongo::Client.new(["localhost:#{port}"], database: 'test') coll = client['foo'] coll.delete_many coll.insert_one(_id: 1) begin coll.insert_one(_id: 1) rescue Mongo::Error::OperationFailure => e pp e.document end end [14400, 14420, 14440, 14900, 14920, 14940].each do |port| puts puts "Testing #{port}" test(port) end
Legend:
14400 4.4 standalone
14420 4.4 replica set
14440 4.4 sharded cluster
14900 4.9 standalone
14920 4.9 replica set
14940 4.9 sharded cluster
Results:
Testing 14400
{"n"=>0,
"writeErrors"=>
[{"index"=>0,
"code"=>11000,
"keyPattern"=>{"_id"=>1},
"keyValue"=>{"_id"=>1},
"errmsg"=>
"E11000 duplicate key error collection: test.foo index: _id_ dup key: { _id: 1 }"}],
"ok"=>1.0}
Testing 14420
{"n"=>0,
"writeErrors"=>
[{"index"=>0,
"code"=>11000,
"keyPattern"=>{"_id"=>1},
"keyValue"=>{"_id"=>1},
"errmsg"=>
"E11000 duplicate key error collection: test.foo index: _id_ dup key: { _id: 1 }"}],
"opTime"=>
{"ts"=>
#<BSON::Timestamp:0x00005567763138b8 @increment=2, @seconds=1616946710>,
"t"=>1},
"electionId"=>BSON::ObjectId('7fffffff0000000000000001'),
"ok"=>1.0,
"$clusterTime"=>
{"clusterTime"=>
#<BSON::Timestamp:0x0000556776313688 @increment=3, @seconds=1616946710>,
"signature"=>
{"hash"=><BSON::Binary:0x1660 type=generic data=0x0000000000000000...>,
"keyId"=>0}},
"operationTime"=>
#<BSON::Timestamp:0x0000556776313430 @increment=2, @seconds=1616946710>}
Testing 14440
{"n"=>0,
"writeErrors"=>
[{"index"=>0,
"code"=>11000,
"codeName"=>"DuplicateKey",
"errmsg"=>
"E11000 duplicate key error collection: test.foo index: _id_ dup key: { _id: 1 }"}],
"ok"=>1.0,
"operationTime"=>
#<BSON::Timestamp:0x00005567761da370 @increment=3, @seconds=1616946710>,
"$clusterTime"=>
{"clusterTime"=>
#<BSON::Timestamp:0x00005567761da000 @increment=4, @seconds=1616946710>,
"signature"=>
{"hash"=><BSON::Binary:0x1780 type=generic data=0x0000000000000000...>,
"keyId"=>0}}}
Testing 14900
{"n"=>0,
"writeErrors"=>
[{"index"=>0,
"code"=>11000,
"keyPattern"=>{"_id"=>1},
"keyValue"=>{"_id"=>1},
"errmsg"=>
"E11000 duplicate key error collection: test.foo index: _id_ dup key: { _id: 1 }"}],
"ok"=>1.0}
Testing 14920
{"n"=>0,
"electionId"=>BSON::ObjectId('7fffffff0000000000000001'),
"opTime"=>
{"ts"=>
#<BSON::Timestamp:0x0000556775c21820 @increment=2, @seconds=1616946710>,
"t"=>1},
"writeErrors"=>
[{"index"=>0,
"code"=>11000,
"keyPattern"=>{"_id"=>1},
"keyValue"=>{"_id"=>1},
"errmsg"=>
"E11000 duplicate key error collection: test.foo index: _id_ dup key: { _id: 1 }"}],
"ok"=>1.0,
"$clusterTime"=>
{"clusterTime"=>
#<BSON::Timestamp:0x0000556775c37468 @increment=3, @seconds=1616946710>,
"signature"=>
{"hash"=><BSON::Binary:0x2120 type=generic data=0x0000000000000000...>,
"keyId"=>0}},
"operationTime"=>
#<BSON::Timestamp:0x0000556775c37080 @increment=2, @seconds=1616946710>}
Testing 14940
{"n"=>0,
"writeErrors"=>
[{"index"=>0,
"code"=>11000,
"codeName"=>"DuplicateKey",
"errmsg"=>
"E11000 duplicate key error collection: test.foo index: _id_ dup key: { _id: 1 }"}],
"ok"=>1.0,
"$clusterTime"=>
{"clusterTime"=>
#<BSON::Timestamp:0x000055677654c080 @increment=10, @seconds=1616946710>,
"signature"=>
{"hash"=><BSON::Binary:0x2240 type=generic data=0x0000000000000000...>,
"keyId"=>0}},
"operationTime"=>
#<BSON::Timestamp:0x0000556776533e40 @increment=9, @seconds=1616946710>}
On both 4.4 and 4.9, sharded cluster responses include codeName and neither standalone nor mongos responses do.
Since the error originates in a mongod, mongod should be able to fill in the code name also?
Tested on 4.9.0-alpha7.
