Major Description
Here in GridLongList we serialize all elements and don't take into account `idx` value:
@Override public boolean writeTo(ByteBuffer buf, MessageWriter writer) { writer.setBuffer(buf); if (!writer.isHeaderWritten()) { if (!writer.writeHeader(directType(), fieldsCount())) return false; writer.onHeaderWritten(); } switch (writer.state()) { case 0: if (!writer.writeLongArray("arr", arr)) return false; writer.incrementState(); case 1: if (!writer.writeInt("idx", idx)) return false; writer.incrementState(); } return true; }
Which is not happening in another serialization method in the same class:
public static void writeTo(DataOutput out, @Nullable GridLongList list) throws IOException { out.writeInt(list != null ? list.idx : -1); if (list != null) { for (int i = 0; i < list.idx; i++) out.writeLong(list.arr[i]); } }
So, we can simply reduce messages size by sending only a valuable part of the array.
I created this issue according to a discussion on the mailing list:
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