Sometimes fetching a Future more than once causes Julia to hang #15406
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andreasnoack opened this Issue on Mar 8 · 2 comments
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@andreasnoack
@amitmurthy
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@andreasnoack
The Julia Language member
andreasnoack commented on Mar 8

If it is not allowed with Futures it would be great with an error instead of just hanging. Furthermore, it is not possible to interrupt Julia with ctrl+c. It is possibly a separate issue, though. The following reproduces the error.

julia> addprocs(1)
1-element Array{Int64,1}:
 2

julia> v = remotecall_wait(() -> 2, 2)
Future(2,1,3,Nullable{Any}())

julia> fetch(v)
2

julia> remotecall_wait(t -> fetch(t), 2, v)

cc: @amitmurthy
@amitmurthy
The Julia Language member
amitmurthy commented on Mar 8

This is a bug. Once fetched the value should be cached locally. Will fix.
@vtjnash vtjnash added bug parallel labels on Mar 9
@amitmurthy amitmurthy referenced this issue on Mar 9
Merged
fix bug during deserialization with fetched Futures #15416
@amitmurthy amitmurthy closed this in #15416 on Mar 9
@andreasnoack
The Julia Language member
andreasnoack commented on Mar 9

Thanks for fixing this.