Project FAQs

• What is Infinispan?

• What would I use Infinispan for?

• How is Infinispan related to JBoss Cache?

• What version of Java does Infinispan need to run? Does Infinispan need an application server to run?

• Will there be a POJO Cache replacement in Infinispan?

• How come Infinispan's first release is 4.0.0?  This sounds weird!

• What should I use, JBoss Cache or Infinispan?

• Where can I get more information on Infinispan?

• How is this related to JSR 107, the JCACHE specification?

• Can I use Infinispan with Hibernate?

Technical FAQs

These are questions pertaining to the Infinispan code.  Typically, most of these questions would only be relevant to specific versions of Infinispan.

• General FAQs

  • What APIs does Infinispan offer?

  • Which JVMs (JDKs) does Infinispan work with?

  • Is Infinispan's configuration compatible with JBoss Cache?

  • Grouping API vs Key Affinity Service

  • Does Infinispan store data by value or by reference?

• Cache Loaders and Cache Store FAQs

  • Cache loaders and cache stores - what's the difference?

  • Are modifications to asynchronous cache stores coalesced or aggregated?

  • In JBoss Cache, the JDBC and File CacheLoaders had restrictions such as only being able to use Strings in Fqns. Is this still the case in Infinispan?

  • What does the passivation flag do?

  • What if I get IOException "Unsupported protocol version 48" with JdbcStringBasedCacheStore?

  • Is there any way I can boost cache store's performance? SKIP_CACHE_LOAD

• Locking FAQs

  • Does Infinispan support distributed eager locking?

  • How does Infinispan support explicit eager locking?

  • How does Infinispan support implicit eager locking?

  • JBoss Cache exposed several different locking schemes - pessimistic, optimistic and MVCC.  I don't see a way to specify locking scheme in Infinispan.  Why is this?

  • What isolation levels does Infinispan support?

• Transaction FAQs

  • When using Atomikos transaction manager, distributed caches are not distributing data, what is the problem?

• Eviction and Expiration FAQs

  • Cache's number of entries never reaches configured maxEntries, why is that?

  • Expiration does not work, what is the problem?

  • Why is cache size sometimes even higher than specified maxEntries of the eviction configuration element?

  • Why isn't there a notification for the expiration of a cache entry?

• Cache Manager FAQs

  • Can I create caches using different cache modes using the same cache manager?

  • Can transactions span different Cache instances from the same cache manager?

  • How does multi-tenancy work?

  • Infinispan allows me to create several Caches from a single CacheManager.  Are there any reasons to create separate CacheManagers?

• Cache Mode FAQs

  • What is the difference between a replicated cache and a distributed cache?

  • Does DIST support both synchronous and asynchronous communications?

  • I have caches configured with asynchronous replication or distribution, but these caches appear to be behaving synchronously (waiting for responses), what is going on?

  • I notice that when using DIST, the cache does a remote get before a write command. Why is this?

  • I use a clustered cache. I want the guarantees of synchronous replication with the parallelism of asynchronous replication. What can I do?

  • Is buddy replication supported?

  • What is the L1 cache?

  • What consistency guarantees do I have with different Asynchronous processing settings ?

• Listener FAQs

  • In a cache entry modified listener, can the modified value be retrieved via Cache.get() when isPre=false?

  • When annotating a method with CacheEntryCreated, how do I retrieve the value of the cache entry added?

• Cloud FAQs

  • How do you make Infinispan send replication traffic over a specific network when you don't know the IP address?

• Demo FAQs

  • When using the GUI Demo, I've just put an entry in the cache with lifespan of -1. Why do I see it as having a lifespan of 60,000?

• Query Module FAQs

  • When I run an application based on the Query module, I get a ClassNotFoundException for org.slf4j.impl.StaticLoggerBinder. How do I solve it?

• JBoss Application Server Integration FAQs

  • Can I run my own Infinispan cache within JBoss Application Server 5 or 4?

  • Can I run my own Infinispan cache within JBoss Application Server 6?

• Logging FAQs

  • How can I enable logging?

• Third Party Container FAQs

  • Can I use Infinispan on Google App Engine for Java?

  • When running on Glassfish or Apache, creating a cache throws an exception saying "Unable to construct a GlobalComponentRegistry", what is it wrong?

• Language FAQs

  • Can I use Infinispan with Groovy? What about Jython, Clojure, JRuby or Scala etc.?

• Marshalling & Unmarshalling

  • Best practices implementing java.io.Externalizable

  • Does Infinispan support storing Non-Serializable objects?

  • Do Externalizer implementations need to access internal Externalizer implementations?

  • Do I need to register an application cacheloader when using an isolated deployment?

  • During state transfer, the state receiver logs an EOFException when applying state saying "Read past end of file". Should I worry about this?

  • How do I get more information on marshalling & unmarshalling exceptions?

  • Why am I getting invalid data passed to readExternal?

• Tuning FAQs

  • When running Infinispan under load, I see RejectedExecutionException, how can I fix it?

• JNDI FAQs

  • Can I bind Cache or CacheManager to JNDI?

• Hibernate 2nd Level Cache FAQs

  • Can I use Infinispan as a remote JPA or Hibernate second level cache?

  • I'm adding the Infinispan 2nd level cache provider to existing servers that already use JGroups. Should I set Infinispan to use the same JGroups cluster, or should I use two separate cluster names?

  • Is it possible to use the Infinispan 2nd level cache outside of a J2EE server, and if so how do I set up the transaction manager lookup?

  • What are the pitfalls of not using a non-JTA transaction factory such as JDBCTransactionFactory with Hibernate when Infinispan is used as 2nd level cache provider?

• Cache Server FAQs

  • After running a Hot Rod server for a while, I get a NullPointerException in HotRodEncoder.getTopologyResponse(), how can I get around it?

  • Is there a way to do a Bulk Get on a remote cache?

  • What is the startServer.sh script used for? What is the startServer.bat script used for?

• Debugging FAQs

  • How can I get Infinispan to show the full byte array? The log only shows partial contents of byte arrays...

• Clustering Transport FAQs

  • How do I retrieve the clustering physical address?

• CLI FAQs

  • Can data stored via CLI be read using Infinispan remote clients (Hot Rod, Memcached, REST)?