[Ur] Error triggers unlimited retry

[Sergey Mironov]

Aha, ok I got it! Thanks

2013/8/6 Adam Chlipala <adamc at csail.mit.edu>:
> On 08/06/2013 09:42 AM, Sergey Mironov wrote:
>>
>> I'm facing following error message while running examples
>>
>> Error triggers unlimited retry: Couldn't allocate new heap chunk
>> contiguously; increasing size to 128
>>
>> What does it mean? Is it dangerous?
>
>
> Ah, a perfect question to follow up on my reply to the last question,
> warning against exposing non-transactional effectful operations with the
> FFI. :D
>
> No, this error message isn't dangerous.  It just means that the runtime
> system decided to roll back and restart a transaction, to allow allocation
> of more memory.  (Ur/Web doesn't use garbage collection, so a transaction
> restarts whenever a conventional garbage-collected system would instead grow
> the heap and copy old objects over.)
>
> In particular, you should expect to see the message you quoted several times
> at the start of each thread, as it grows its heap size exponentially to fit
> the requirements of the requests it receives.