[TINKERPOP-3076] Incorrect handling of large requests in Go GLV

• Type: Improvement
• Status: Open
• Priority: Critical
• Resolution: Unresolved
• Affects Version/s: 3.6.7, 3.7.2
• Component/s: go
• Assignee: Unassigned
• Reporter: Valentyn Kahamlyk
• Created: 24/Apr/24 19:20
• Updated: 24/Apr/24 19:20

Description

When trying to send a request longer than about a megabyte, go GLV does not work correctly, possibly truncates data.

Simple reproducer 

func main() {
    driverRemoteConnection, err := gremlingo.NewDriverRemoteConnection("ws://localhost:8182/gremlin")
    if err != nil {
       fmt.Println(err)
       return
    }
    defer driverRemoteConnection.Close()
    g := gremlingo.Traversal_().WithRemote(driverRemoteConnection)

    const count = 1100
    var ids [count]string
    const idLength = 1000

    result := make([]byte, idLength)
    for i := 0; i < idLength; i++ {
       result[i] = 65
    }
    id := string(result)

    for i := 0; i < count; i++ {
       ids[i] = id
    }

    r, err := g.V(ids).Count().ToList()
    if err != nil {
       fmt.Println("err: ", err)
       return
    }
    fmt.Println("found: ", r[0].GetString()) 
}

with `count = 1000` it works as expected.

Python GLV works as expected with same request.

Error logged in Gremlin Server 

io.netty.handler.codec.DecoderException: java.lang.IndexOutOfBoundsException: readerIndex(1048338) + length(1000) exceeds writerIndex(1048543): PooledUnsafeDirectByteBuf(ridx: 1048338, widx: 1048543, cap: 1048576)