Apache Ignite : Transaction support and cache definition - ignite

Question

We are experimenting with Apache Ignite to use it as a Read and Write through caching layer for Distributed applications. The need is to weave a cache layer for the aggregates we depend on. Indiviual constituent entities that these aggregates comprise of, are managed entities maintained by EntityManager.
Two Questions:
Does Apache Ignite participate in Container Managed Transaction out of box ?
In order to understand solution to Q1 , I did a small experiment described below. Any insights on what induces below behaviour ?
Aggregates : Strategy and Strategy Parameter - one to many mapping.
Individual Entities : Strategy and StrategyParam (both managed by JPA/Hibernate).
CacheStore definition based on entitymanager : eg write method:
#Override
public void write(Cache.Entry<? extends Long, ? extends StrategyAggregate> entry) throws CacheWriterException {
em.merge(entry.getValue().getStrategy());
entry.getValue().getStrategyParamList().forEach(strategyParam -> em.merge(strategyParam));
}
Now when we init first node with above cache definition, I see the transaction nature working alright i.e. post method completion I see both cache and database updated i.e. I can read the changes from cache.
But as soon as second node joins the cluster, the same api throws up error
"no entitymanager available ..." followed by stacktrace having transaction has been rolled back. Though Read from both cache and direct read from entity manager works fine.
Stacktrace
Caused by: javax.cache.integration.CacheWriterException: javax.persistence.TransactionRequiredException: No EntityManager with actual transaction available for current thread - cannot reliably process 'merge' call
... 79 common frames omitted
Caused by: javax.persistence.TransactionRequiredException: No EntityManager with actual transaction available for current thread - cannot reliably process 'merge' call
at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:285) ~[spring-orm-4.3.25.RELEASE.jar:4.3.25.RELEASE]
at com.sun.proxy.$Proxy102.merge(Unknown Source) ~[na:na]
at StrategyAggregateCacheStore.write(StrategyAggregateCacheStore.java:47) ~[classes/:na]
at org.apache.ignite.internal.processors.cache.store.GridCacheStoreManagerAdapter.put(GridCacheStoreManagerAdapter.java:585) ~[ignite-core-2.11.0.jar:2.11.0]
... 78 common frames omitted