Within a transaction, calling a read operation for a second time with FORCE_WRITE_LOCK on can lead to a NullPointerException when cache is configured with a cache loader and the calls are done just after restarting the cache:

java.lang.NullPointerException
at org.infinispan.interceptors.CacheLoaderInterceptor.recordLoadedEntry(CacheLoaderInterceptor.java:182)
at org.infinispan.interceptors.CacheLoaderInterceptor.loadIfNeeded(CacheLoaderInterceptor.java:147)
at org.infinispan.interceptors.CacheLoaderInterceptor.loadIfNeededAndUpdateStats(CacheLoaderInterceptor.java:200)
at org.infinispan.interceptors.CacheLoaderInterceptor.visitGetKeyValueCommand(CacheLoaderInterceptor.java:87)
at org.infinispan.commands.read.GetKeyValueCommand.acceptVisitor(GetKeyValueCommand.java:58)
at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:118)
at org.infinispan.interceptors.base.CommandInterceptor.handleDefault(CommandInterceptor.java:132)
at org.infinispan.commands.AbstractVisitor.visitGetKeyValueCommand(AbstractVisitor.java:87)
at org.infinispan.commands.read.GetKeyValueCommand.acceptVisitor(GetKeyValueCommand.java:58)
at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:118)
at org.infinispan.interceptors.TxInterceptor.enlistReadAndInvokeNext(TxInterceptor.java:171)
at org.infinispan.interceptors.TxInterceptor.visitGetKeyValueCommand(TxInterceptor.java:162)
at org.infinispan.commands.read.GetKeyValueCommand.acceptVisitor(GetKeyValueCommand.java:58)
at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:118)
at org.infinispan.interceptors.InvocationContextInterceptor.handleAll(InvocationContextInterceptor.java:58)
at org.infinispan.interceptors.InvocationContextInterceptor.handleDefault(InvocationContextInterceptor.java:39)
at org.infinispan.commands.AbstractVisitor.visitGetKeyValueCommand(AbstractVisitor.java:87)
at org.infinispan.commands.read.GetKeyValueCommand.acceptVisitor(GetKeyValueCommand.java:58)
at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:118)
at org.infinispan.interceptors.BatchingInterceptor.handleDefault(BatchingInterceptor.java:76)
at org.infinispan.commands.AbstractVisitor.visitGetKeyValueCommand(AbstractVisitor.java:87)
at org.infinispan.commands.read.GetKeyValueCommand.acceptVisitor(GetKeyValueCommand.java:58)
at org.infinispan.interceptors.InterceptorChain.invoke(InterceptorChain.java:271)
at org.infinispan.CacheDelegate.get(CacheDelegate.java:200)
at org.infinispan.atomic.AtomicHashMapProxy.getDeltaMapForRead(AtomicHashMapProxy.java:73)
at org.infinispan.atomic.AtomicHashMapProxy.getDeltaMapForWrite(AtomicHashMapProxy.java:95)
at org.infinispan.atomic.AtomicHashMapProxy.put(AtomicHashMapProxy.java:154)
at org.infinispan.tree.TreeCacheImpl.put(TreeCacheImpl.java:336)
at org.infinispan.loaders.TreeCacheWithLoaderTest.testDuplicatePersistence(TreeCacheWithLoaderTest.java:81)