Dmitriy, I think this issue highlights another lack in our documentation that emerged with introduction of PageMemory.
In current documentation we have some recommendations about memory capacity planning. As PageMemory storage data structures introduce their own overhead; this section of documentation must be updated. As per "null" in OutOfMemoryException message, I've already addressed it so now when PageMemory fails to allocate new page, it throws an IgniteOutOfMemoryException with message like "Failed to allocate new page within <MemoryPolicyName> MemoryPolicy". Thanks, Sergey. On Mon, Apr 17, 2017 at 6:52 PM, Dmitriy Setrakyan <dsetrak...@apache.org> wrote: > Wow.... If it happened to Denis, it will happen to many other users as > well. With the exception error message saying "Null", I doubt any user > would figure out what to do. > > Can we fix the error message? > > D. > > > On Mon, Apr 17, 2017 at 6:03 AM, Sergey Chugunov < > sergey.chugu...@gmail.com> > wrote: > > > Denis, > > > > I found an issue with the example: each cache introduces some memory > > overhead (mostly for cache partitions data structures) and it must be > > counted in MemoryPolicy size. > > > > To fix the example just increase size of *10MB_Region_Eviction *to 15 MB > > and *5MB_Region_Swapping *to 10 MB. > > > > I didn't find any documentation on this, but I think it is part of new > > PageMemory-based storage so it needs to be documented as part of > ignite-2.0 > > release. > > > > Thanks, > > Sergey. > > > > > > > > On Mon, Apr 17, 2017 at 2:50 PM, Sergey Chugunov < > > sergey.chugu...@gmail.com> > > wrote: > > > > > Denis, > > > > > > It looks like partition exchange mechanism allocates a lot of pages > right > > > after the cache is started. > > > I'm trying to figure out what's going on. > > > > > > Thanks, > > > Sergey. > > > > > > On Mon, Apr 17, 2017 at 12:05 AM, Denis Magda <dma...@apache.org> > wrote: > > > > > >> Igniters, > > >> > > >> I’ve created a simple example to demonstrate how to set up various > > >> policies: > > >> https://github.com/apache/ignite/blob/master/examples/src/ > > >> main/java/org/apache/ignite/examples/datagrid/MemoryPolicies > > Example.java > > >> > > >> However, this tiny example fails with > > >> > > >> Caused by: class org.apache.ignite.internal.mem.OutOfMemoryException: > > >> null > > >> at org.apache.ignite.internal.pagemem.impl. > PageMemoryNoStoreImp > > >> l.allocatePage(PageMemoryNoStoreImpl.java:255) > > >> at org.apache.ignite.internal.processors.cache. > IgniteCacheOffhe > > >> apManagerImpl.allocateForTree(IgniteCacheOffheapManagerImpl.java:635) > > >> at org.apache.ignite.internal.processors.cache. > IgniteCacheOffhe > > >> apManagerImpl.createCacheDataStore0(IgniteCacheOffheapManage > > >> rImpl.java:727) > > >> at org.apache.ignite.internal.processors.cache. > IgniteCacheOffhe > > >> apManagerImpl.createCacheDataStore(IgniteCacheOffheapManager > > >> Impl.java:711) > > >> at org.apache.ignite.internal.processors.cache.distributed. > dht. > > >> GridDhtLocalPartition.<init>(GridDhtLocalPartition.java:162) > > >> at org.apache.ignite.internal.processors.cache.distributed. > dht. > > >> GridDhtPartitionTopologyImpl.createPartition(GridDhtPartitio > > >> nTopologyImpl.java:718) > > >> at org.apache.ignite.internal.processors.cache.distributed. > dht. > > >> GridDhtPartitionTopologyImpl.initPartitions0(GridDhtPartitio > > >> nTopologyImpl.java:405) > > >> at org.apache.ignite.internal.processors.cache.distributed. > dht. > > >> GridDhtPartitionTopologyImpl.beforeExchange(GridDhtPartition > > >> TopologyImpl.java:569) > > >> at org.apache.ignite.internal.processors.cache.distributed. > dht. > > >> preloader.GridDhtPartitionsExchangeFuture. > > distributedExchange(GridDhtPar > > >> titionsExchangeFuture.java:844) > > >> at org.apache.ignite.internal.processors.cache.distributed. > dht. > > >> preloader.GridDhtPartitionsExchangeFuture.init(GridDhtPartit > > >> ionsExchangeFuture.java:573) > > >> at org.apache.ignite.internal.processors.cache. > GridCachePartiti > > >> onExchangeManager$ExchangeWorker.body(GridCacheP > > >> artitionExchangeManager.java:1800) > > >> ... 2 more > > >> > > >> > > >> > > >> What I’m doing wrong? Alex G., could you take a look? Probably I’m > > >> missing something due to a lack of documentation. > > >> > > >> — > > >> Denis > > >> > > >> > > > > > >
