Unexpected exception in Dalli: TypeError: no marshal_dump is defined for class Thread about dalli HOT 10 CLOSED

sounds like it's trying to cache a thread? that doesn't make a lot of sense... maybe more debug needed? what happens if you run without the block?

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Hi, if I don't use "Rails.cache.fetch" and use just "active_deal" everything works.

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What if you just use fetch without the block? Would help to pinpoint the issue.

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Sorry but I don't know what you mean.

This does not work at all:
Rails.cache.fetch('all_active_deals', :expires_in => 10.minutes) active_deal

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drop the active_deal and just use

Rails.cache.fetch('all_active_deals').

It obviously won't return anything if there is nothing stored already, but this would show if it is a Dalli issue or an issue with what you are trying to cache.

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Just like you say it returns nothing. The dalli cache is working, I do have some fragments that I cache and there is no problem with it.

The mysterious thing is, that the error message from above just started showing as I switched to dalli. memcached-northscale worked but it doesn't run under Rails3 that why I switched to dalli.

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so in rails console do something like

deals = active_deal
Rails.cache.write('all_active_deals', deals)

if that works, run

Rails.cache.fetch('all_active_deals') 

and see what fails.

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As plukevdh points out, your code is trying to cache a Thread instance, which does not work. Whatever active_deal returns, it contains a reference to a Thread somewhere.

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I really don't know if there is a thread instance, I have to check it though.

@plukevdh: The cache.write fails. So it really looks like a thread problem. Like I said I have to check it.

Thanks guys.

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Ok, after a lot of testing I found that I cannot store my named-scope in the cache.

Like I said, the mysterious thing is that it worked before with memcached-northscale. But like mperham pointed out - dalli cache works a bit different.

I will use fragment caching then.
Thanks.

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