Currently both the marshaller and transport have the same stop priority.

Marshaller should stop after transport, otherwise the marshaller could have been stopped but something might still be received in the transport channel and you could get an NPE like this:

Exception in thread "Scarlet/Lucene service thread index reopening thread-1" java.lang.NullPointerException
at org.infinispan.marshall.jboss.ConstantObjectTable.readObject(ConstantObjectTable.java:253)
at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:357)
at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:207)
at org.jboss.marshalling.AbstractUnmarshaller.readObject(AbstractUnmarshaller.java:85)
at org.infinispan.marshall.jboss.GenericJBossMarshaller.objectFromObjectStream(GenericJBossMarshaller.java:163)
at org.infinispan.marshall.VersionAwareMarshaller.objectFromByteBuffer(VersionAwareMarshaller.java:111)
at org.infinispan.marshall.AbstractStreamingMarshaller.objectFromInputStream(AbstractStreamingMarshaller.java:24)
at org.infinispan.loaders.jdbc.JdbcUtil.unmarshall(JdbcUtil.java:88)
at org.infinispan.loaders.jdbc.binary.JdbcBinaryCacheStore.loadBucket(JdbcBinaryCacheStore.java:220)
at org.infinispan.loaders.bucket.BucketBasedCacheStore.loadLockSafe(BucketBasedCacheStore.java:36)
at org.infinispan.loaders.LockSupportCacheStore.load(LockSupportCacheStore.java:96)
at org.infinispan.loaders.decorators.AbstractDelegatingStore.load(AbstractDelegatingStore.java:86)
at org.infinispan.interceptors.CacheLoaderInterceptor.loadIfNeeded(CacheLoaderInterceptor.java:133)
at org.infinispan.interceptors.CacheLoaderInterceptor.loadIfNeededAndUpdateStats(CacheLoaderInterceptor.java:195)
at org.infinispan.interceptors.CacheLoaderInterceptor.visitGetKeyValueCommand(CacheLoaderInterceptor.java:86)
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.CacheMgmtInterceptor.visitGetKeyValueCommand(CacheMgmtInterceptor.java:83)
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:199)
at org.infinispan.lucene.InfinispanDirectory.getFileList(InfinispanDirectory.java:235)
at org.infinispan.lucene.InfinispanDirectory.list(InfinispanDirectory.java:102)
at org.infinispan.lucene.InfinispanDirectory.listAll(InfinispanDirectory.java:287)
at org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfos.java:564)
at org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfos.java:517)
at org.apache.lucene.index.SegmentInfos.read(SegmentInfos.java:306)
at org.apache.lucene.index.SegmentInfos.readCurrentVersion(SegmentInfos.java:408)
at org.apache.lucene.index.DirectoryReader.isCurrent(DirectoryReader.java:797)
at org.apache.lucene.index.DirectoryReader.doReopenNoWriter(DirectoryReader.java:407)
at org.apache.lucene.index.DirectoryReader.doReopen(DirectoryReader.java:386)
at org.apache.lucene.index.DirectoryReader.reopen(DirectoryReader.java:348)
at com.sourcesense.scarlet.index.lucenetuning.ReaderPooler$ReopenReaderRunnable.run(ReaderPooler.java:254)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:619)