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Type:
Bug
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Resolution: Fixed
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Priority:
Major - P3
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None
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Affects Version/s: None
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Component/s: Sync
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None
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?
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7536
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Not Needed
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Core Sync Realm
Hi, I'm running into an odd issue with the StateApplierTool and applying conflicting isDefault writes. It looks like there may be some weirdness around the handling for null payloads/OT
The repro inputs are attached here and detailed below
Changeset #1
Upload Message: [
{
"timestamp": 200,
"instructions": [
{
"summary": "CreateObject { table: \"ww\", id: UUID(3e3b5f26-a6b8-c14c-e4d7-4abe8e34ad8d) }",
"raw": "PwACd3cCAAs+O18mprjBTOTXSr6ONK2N"
},
{
"summary": "Update { (table=\"ww\", ID=UUID(3e3b5f26-a6b8-c14c-e4d7-4abe8e34ad8d), fullPath=\"qu\"), payload: -6.355252517323399e+307, isDefault: true, priorSize: 0 }",
"raw": "PwACd3c/AQJxdQQACz47XyamuMFM5NdKvo40rY0BAAeqDn59HaDW/wE="
},
{
"summary": "Update { (table=\"ww\", ID=UUID(3e3b5f26-a6b8-c14c-e4d7-4abe8e34ad8d), fullPath=\"ur\"), payload: 6.192209238937289e+307, isDefault: true, priorSize: 0 }",
"raw": "PwACd3c/AQJ1cgQACz47XyamuMFM5NdKvo40rY0BAAcmfHTmhAvWfwE="
}
]
}
],
IDENT
Changeset #2
Download Message:[
{
"timestamp": 100,
"instructions": [
{
"summary": "CreateObject { table: \"ww\", id: UUID(3e3b5f26-a6b8-c14c-e4d7-4abe8e34ad8d) }",
"raw": "PwACd3cCAAs+O18mprjBTOTXSr6ONK2N"
},
{
"summary": "Update { (table=\"ww\", ID=UUID(3e3b5f26-a6b8-c14c-e4d7-4abe8e34ad8d), fullPath=\"qu\"), payload: null, isDefault: true, priorSize: 0 }",
"raw": "PwACd3c/AQJxdQQACz47XyamuMFM5NdKvo40rY0BAAAB"
},
{
"summary": "Update { (table=\"ww\", ID=UUID(3e3b5f26-a6b8-c14c-e4d7-4abe8e34ad8d), fullPath=\"ur\"), payload: -1.338641371363204e+307, isDefault: true, priorSize: 0 }",
"raw": "PwACd3c/AQJ1cgQACz47XyamuMFM5NdKvo40rY0BAAfGE0VKGRCz/wE="
}
]
}
]
This series of events correctly produces the following realm:
{
"_id": 3e3b5f26-a6b8-c14c-e4d7-4abe8e34ad8d,
"qu": -6.355252517323399e+307,
"ur": 6.192209238937289e+307,
}
If we instead flip the upload and download messages (Upload Changeset #2 and Download Changeset #1) we get the following realm where the field "qu" gets set to null but "ur" is still set to the correct value from CS1
{
"_id": 3e3b5f26-a6b8-c14c-e4d7-4abe8e34ad8d,
"qu": null,
"ur": 6.192209238937289e+307,
}
Verbose logs from state applier in the case that ends up with the incorrect result
found upload changeset: 1 1 100 1 39 Decoded changeset: [changeset with 3 instructions] found upload changeset: 2 2 100 1 88 Decoded changeset: [changeset with 3 instructions] group.get_or_add_table_with_primary_key(group, "class_ww", type_UUID, "_id", true, TopLevel); integrated local changesets as version 6 sync::create_object_with_primary_key(group, get_table("class_ww"), 3e3b5f26-a6b8-c14c-e4d7-4abe8e34ad8d); integrated local changesets as version 7 decoding download message. {download: {server: 2, client: 0} upload: {server: 0, client: 0}, latest: 0} found download changeset: serverVersion: 1, clientVersion: 0, origin: 2 [changeset with 3 instructions] found download changeset: serverVersion: 2, clientVersion: 0, origin: 2 [changeset with 3 instructions] Scanning incoming changeset [1/2] (3 instructions) Scanning incoming changeset [2/2] (3 instructions) Scanning local changeset [1/4] (3 instructions) Scanning local changeset [2/4] (3 instructions) Scanning local changeset [3/4] (1 instructions) Scanning local changeset [4/4] (4 instructions) Indexing incoming changeset [1/2] (3 instructions) Indexing incoming changeset [2/2] (3 instructions) Finished changeset indexing (incoming: 2 changeset(s) / 6 instructions, local: 4 changeset(s) / 11 instructions, conflict group(s): 2) Transforming local changeset [1/4] through 2 incoming changeset(s) with 2 conflict group(s) Transforming local changeset [2/4] through 2 incoming changeset(s) with 2 conflict group(s) Transforming local changeset [3/4] through 2 incoming changeset(s) with 2 conflict group(s) Transforming local changeset [4/4] through 2 incoming changeset(s) with 2 conflict group(s) Finished transforming 4 local changesets through 2 incoming changesets (11 vs 6 instructions, in 2 conflict groups) Integrated 2 changesets out of 2
