Re: [infinispan-dev] ISPN-2808 - thread pool for incoming message [feedback]

On 27 Feb 2013, at 19:06, Pedro Ruivo wrote: Hi all, I'm working on ISPN-2808 and I want some feedback about it (code is here [1]) I'm starting to implement this feature but I know that Asynchronous Invocation API is not totally finished in JGroups. My idea in to use an executor service in CommandAwareRpcDispatcher (CARD) and when a request (command) is received, it checks if it is useful to move the command execution to another thread (in this line [2]) For now, I'm thinking to move all the write commands, lock control command, prepare command and commit command to the executor service (Note: commit command is only moved when in DIST mode and L1 is enabled). you might want to move Commit there when we have a tx cache and cache store - it's during the commit where the data is written to the cache store and that might take time.

first question: do you think it is fine to move the commands to the executor service in CARD or should I move this functionally to the InvoundHandler? +1 for the InboundInvocationHandler: with ISPN-2849 we'll build the tx dependency right before invoking the interceptor chain (potentially in a new interceptor), so i think the closer you move it to the interceptor chain the better. second question: do you have in mind other commands may block the OOB/Regular thread and should be moved to a thread in the executor service? Generally all the commands that are long-processing(lock acquisition or interaction with a cache store) would be better executed in this pool in order to avoid the OOB/regular thread pool to deadlock. Looking at the command hierarchy for long processing commands: - StateResponseCommand seems to be a good candidate as it might acquire locks -IndexUpdateCommand/ClusterQueryCommand - I'll let Sanne comment on these two, which might require an update on query module as well - MapCombineCommand if a cache loader is present (it iterates over the entries in the loader) Dan/Adrian care to comment on the CacheTopologyControlCommand?