Expect the attach js to result in an insert but it errors out as
assert: [null] != ["Can't modify shard key's value. field: ukey: -111.0 collecti
on: _unknown_name_.collSharded"] are not equal : undefined
Error: Printing Stack Trace
at printStackTrace (src/mongo/shell/utils.js:37:7)
at doassert (src/mongo/shell/assert.js:6:1)
at Function.assert.eq (src/mongo/shell/assert.js:32:1)
at c:\Users\sridhar\Desktop\shardkeyUpsert.js:52:8
Fri Mar 01 14:23:47.367 JavaScript execution failed: [null] != ["Can't modify sh
ard key's value. field: ukey: -111.0 collection: _unknown_name_.collSharded"]
are not equal : undefined at src/mongo/shell/assert.js:L7