When a field of an object is enclosed in a closure, the object itself is
also enclosed automatically, thus the object need to be serializable.
On 11/19/14 6:39 PM, Hao Ren wrote:
Hi,
When reading through ALS code, I find that:
class ALS private (
private var numUserBlocks: Int,
private var numProductBlocks: Int,
private var rank: Int,
private var iterations: Int,
private var lambda: Double,
private var implicitPrefs: Boolean,
private var alpha: Double,
private var seed: Long = System.nanoTime()
) extends *Serializable *with Logging
and why should ALS extend Serializable ?
if not, there will be an Exception: task is not serializable, ALS is not
serializable.
I did not find any closure functions in which ALS is referenced.
Any idea ? Thx.
Hao
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