On Thu, Apr 16, 2015 at 9:01 AM, Ognen Duzlevski <[email protected]>
wrote:
> Hello all,
>
> I have a few questions as I am starting to play with Ignite in Scala:
>
> 1. It seems like every time I want to obtain a reference to a cache, I
> actually "join or create a grid" with a full fledged JVM/CPU-set/dedicated
> heap - is this observation correct? Is there a way to just use Ignite as a
> "library" - I make a call, get a reference to a cache and execute puts and
> gets. Or am I completely missing the point?
>
Try Ignition.setClientMode(true). This way caches won't be deployed in your
process, but will still be accessible through IgniteCache API.
>
> 2. I am trying to create an Akka actor system where an actor commits some
> data to a cache upon receiving a message. I already have a grid running and
> it seems like I am able to join that local grid to use the named cache
> (appropriately named "testCache"). Below is the output of what is happening
> - am not sure what exactly the error message means - is it some kind of a
> serialization issue? I am running my example from sbt - do I need to create
> a fat jar and run/deploy that in order to make the failing class available?
>
I am seeing some class-loading issues there. The easiest way to fix this
without further investigation is to include your classes on every Ignite
node. If you start your nodes using "ignite.sh" script, then put your JAR
files into the "libs" folder in your Ignite installation.
>
> [08:12:06] Topology snapshot [ver=15, nodes=1, CPUs=8, heap=1.0GB]
> [08:39:07] Topology snapshot [ver=16, nodes=2, CPUs=8, heap=2.3GB]
> [08:39:08,582][SEVERE][ignite-#23%sys-null%][GridCacheIoManager] Failed to
> process message (note that distributed services do not support peer class
> loading, if you deploy distributed service you should have all required
> classes in CLASSPATH on all nodes in topology)
> [senderId=5e9a1002-76de-495a-8244-8ca337907f72, err=Failed to load class
> [name=com.shoutlet.datascience.socialnetworkpollers.CacheGenderData,
> ctx={1785472cc41-5e9a1002-76de-495a-8244-8ca337907f72=CachedDeploymentInfo
> [sndId=5e9a1002-76de-495a-8244-8ca337907f72,
> ldrId=1785472cc41-5e9a1002-76de-495a-8244-8ca337907f72, userVer=0,
> depMode=SHARED, participants=null]}]]
> [08:39:30] Topology snapshot [ver=17, nodes=1, CPUs=8, heap=1.0GB]
> [08:39:30]
> [08:39:30] Cleared all cache entries for undeployed class loader for cache:
> default
> [08:39:30] ^-- Cache auto-undeployment happens in SHARED deployment mode
> (to turn off, switch to CONTINUOUS mode)
> [08:39:30]
> [08:39:30]
> [08:39:30] Cleared all cache entries for undeployed class loader for cache:
> testCache
> [08:39:30] ^-- Cache auto-undeployment happens in SHARED deployment mode
> (to turn off, switch to CONTINUOUS mode)
> [08:39:30]
> [08:47:50] Topology snapshot [ver=18, nodes=2, CPUs=8, heap=2.3GB]
> [08:47:53,788][SEVERE][ignite-#32%sys-null%][GridCacheIoManager] Failed to
> process message (note that distributed services do not support peer class
> loading, if you deploy distributed service you should have all required
> classes in CLASSPATH on all nodes in topology)
> [senderId=78ec49fd-bb7b-44b8-a618-0b2b0ed6584c, err=Failed to load class
> [name=com.shoutlet.datascience.socialnetworkpollers.CacheGenderData,
> ctx={7235c72cc41-78ec49fd-bb7b-44b8-a618-0b2b0ed6584c=CachedDeploymentInfo
> [sndId=78ec49fd-bb7b-44b8-a618-0b2b0ed6584c,
> ldrId=7235c72cc41-78ec49fd-bb7b-44b8-a618-0b2b0ed6584c, userVer=0,
> depMode=SHARED, participants=null]}]]
> [08:48:48] Topology snapshot [ver=19, nodes=1, CPUs=8, heap=1.0GB]
>
> 3. Is there a user list where people can ask questions like the above? This
> is dev list and this email may not necessarily fall under that
> classification. I know there is "Ask a question" on the web site but it is
> rather inconvenient and does not compare to a mailing list :)
>
Ask a Question is the only way right now. If you prefer a mailing list, you
can send your questions to the dev list and we will respond.
>
> Thanks!
>
