MassIndexerAsyncBackendTest.testMassIndexOnAsync random failures

java.lang.RuntimeException: Unexpected!
    at org.infinispan.test.AbstractInfinispanTest.eventually(AbstractInfinispanTest.java:166)
    at org.infinispan.test.AbstractInfinispanTest.eventually(AbstractInfinispanTest.java:146)
    at org.infinispan.test.AbstractInfinispanTest.eventually(AbstractInfinispanTest.java:122)
    at org.infinispan.test.AbstractInfinispanTest.eventually(AbstractInfinispanTest.java:456)
    at org.infinispan.query.distributed.MassIndexerAsyncBackendTest.assertAllIndexed(MassIndexerAsyncBackendTest.java:59)
    at org.infinispan.query.distributed.MassIndexerAsyncBackendTest.testMassIndexOnAsync(MassIndexerAsyncBackendTest.java:53)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:84)
    at org.testng.internal.MethodInvocationHelper$1.runTestMethod(MethodInvocationHelper.java:200)
    at org.jboss.byteman.contrib.bmunit.BMNGAbstractRunner.run(BMNGAbstractRunner.java:58)
    at sun.reflect.GeneratedMethodAccessor169.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at org.testng.internal.MethodInvocationHelper.invokeHookable(MethodInvocationHelper.java:212)
    at org.testng.internal.Invoker.invokeMethod(Invoker.java:707)
    at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:901)
    at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1231)
    at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:127)
    at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:111)
    at org.testng.TestRunner.privateRun(TestRunner.java:767)
    at org.testng.TestRunner.run(TestRunner.java:617)
    at org.testng.SuiteRunner.runTest(SuiteRunner.java:348)
    at org.testng.SuiteRunner.access$000(SuiteRunner.java:38)
    at org.testng.SuiteRunner$SuiteWorker.run(SuiteRunner.java:382)
    at org.testng.internal.thread.ThreadUtil$2.call(ThreadUtil.java:64)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
Caused by: org.hibernate.search.exception.SearchException: Unable to reopen IndexReader
    at org.hibernate.search.indexes.impl.SharingBufferReaderProvider$PerDirectoryLatestReader.refreshAndGet(SharingBufferReaderProvider.java:242)
    at org.hibernate.search.indexes.impl.SharingBufferReaderProvider.openIndexReader(SharingBufferReaderProvider.java:73)
    at org.hibernate.search.indexes.impl.SharingBufferReaderProvider.openIndexReader(SharingBufferReaderProvider.java:35)
    at org.hibernate.search.reader.impl.ManagedMultiReader.createInstance(ManagedMultiReader.java:68)
    at org.hibernate.search.reader.impl.MultiReaderFactory.openReader(MultiReaderFactory.java:42)
    at org.hibernate.search.query.engine.impl.LuceneHSQuery.buildSearcher(LuceneHSQuery.java:477)
    at org.hibernate.search.query.engine.impl.LuceneHSQuery.buildSearcher(LuceneHSQuery.java:368)
    at org.hibernate.search.query.engine.impl.LuceneHSQuery.queryEntityInfos(LuceneHSQuery.java:131)
    at org.infinispan.query.impl.CacheQueryImpl.list(CacheQueryImpl.java:161)
    at org.infinispan.query.distributed.MassIndexerAsyncBackendTest$1.isSatisfied(MassIndexerAsyncBackendTest.java:62)
    at org.infinispan.test.AbstractInfinispanTest.eventually(AbstractInfinispanTest.java:161)
    ... 31 more
Caused by: java.io.FileNotFoundException: Error loading metadata for index file: M|segments_4|commonIndex|-1
    at org.infinispan.lucene.impl.DirectoryImplementor.openInput(DirectoryImplementor.java:138)
    at org.infinispan.lucene.impl.DirectoryLucene.openInput(DirectoryLucene.java:102)
    at org.apache.lucene.store.Directory.openChecksumInput(Directory.java:109)
    at org.apache.lucene.index.SegmentInfos.readCommit(SegmentInfos.java:294)
    at org.apache.lucene.index.SegmentInfos$1.doBody(SegmentInfos.java:493)
    at org.apache.lucene.index.SegmentInfos$1.doBody(SegmentInfos.java:490)
    at org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfos.java:731)
    at org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfos.java:683)
    at org.apache.lucene.index.SegmentInfos.readLatestCommit(SegmentInfos.java:490)
    at org.apache.lucene.index.StandardDirectoryReader.isCurrent(StandardDirectoryReader.java:344)
    at org.apache.lucene.index.StandardDirectoryReader.doOpenNoWriter(StandardDirectoryReader.java:300)
    at org.apache.lucene.index.StandardDirectoryReader.doOpenIfChanged(StandardDirectoryReader.java:263)
    at org.apache.lucene.index.StandardDirectoryReader.doOpenIfChanged(StandardDirectoryReader.java:251)
    at org.apache.lucene.index.DirectoryReader.openIfChanged(DirectoryReader.java:137)
    at org.hibernate.search.indexes.impl.SharingBufferReaderProvider$PerDirectoryLatestReader.refreshAndGet(SharingBufferReaderProvider.java:239)
    ... 41 more