Using: [XWiki Jetty HSQLDB 11.9] in CentOS 7.
I am seeing huge log files in [folder]/xwiki-jetty-hsqldb/data/logs as [date].output.log and [date].request.log and the main error in output log is
2020-03-03 05:30:57,069 [expiration-thread--p3-t1] WARN o.i.p.m.PersistenceManagerImpl - ISPN000026:Caught exception purging data container!
org.infinispan.persistence.spi.StoreUnavailableException: Store org.infinispan.persistence.file.SingleFileStore@72a61e61 is unavailable
at org.infinispan.persistence.manager.PersistenceManagerImpl.pollStoreAvailability(PersistenceManagerImpl.java:206)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Suppressed: org.infinispan.util.logging.TraceException: null
at org.infinispan.interceptors.impl.SimpleAsyncInvocationStage.get(SimpleAsyncInvocationStage.java:41)
at org.infinispan.interceptors.impl.AsyncInterceptorChainImpl.invoke(AsyncInterceptorChainImpl.java:250)
at org.infinispan.cache.impl.CacheImpl.get(CacheImpl.java:527)
at org.infinispan.cache.impl.CacheImpl.get(CacheImpl.java:520)
at org.infinispan.cache.impl.AbstractDelegatingCache.get(AbstractDelegatingCache.java:438)
at org.infinispan.cache.impl.EncoderCache.get(EncoderCache.java:660)
at org.xwiki.cache.infinispan.internal.InfinispanCache.get(InfinispanCache.java:101)
at org.xwiki.lesscss.internal.cache.AbstractCache.get(AbstractCache.java:84)
at org.xwiki.lesscss.internal.cache.AbstractCachedCompiler.getResult(AbstractCachedCompiler.java:120)
at org.xwiki.lesscss.internal.cache.AbstractCachedCompiler.getResult(AbstractCachedCompiler.java:85)
at org.xwiki.lesscss.internal.compiler.DefaultLESSCompiler.compile(DefaultLESSCompiler.java:66)
at org.xwiki.lesscss.LessCompilerScriptService.compileSkinFile(LessCompilerScriptService.java:109)
at org.xwiki.lesscss.LessCompilerScriptService.compileSkinFile(LessCompilerScriptService.java:94)
at sun.reflect.GeneratedMethodAccessor919.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:395)
at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:384)
at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:173)
and goes on and on. I am sure no one is accessing the xwiki during that time. Any help to fix it or suppress it if it is not important.