when the jboss running , there is the exception log as below , could you please help to suggest how to solve it ?

Error while reading cache for: '/xxx/xxx.css'.
ClientAbortException: java.net.SocketException: Broken pipe
at org.apache.catalina.connector.OutputBuffer.doFlush(OutputBuffer.java:327)
at org.apache.catalina.connector.OutputBuffer.flush(OutputBuffer.java:293)
at org.apache.catalina.connector.CoyoteOutputStream.flush(CoyoteOutputStream.java:97)
at info.magnolia.cms.cache.simple.CacheImpl.streamFromCache(CacheImpl.java:203)
at info.magnolia.cms.cache.DefaultCacheManager.doStreamFromCache(DefaultCacheManager.java:102)
at info.magnolia.cms.cache.BaseCacheManager.streamFromCache(BaseCacheManager.java:248)
at info.magnolia.cms.cache.ManageableCacheManager.streamFromCache(ManageableCacheManager.java:142)
at info.magnolia.cms.cache.CacheFilter.doFilter(CacheFilter.java:65)
at info.magnolia.cms.filters.MagnoliaManagedFilter$CustomFilterChain.doFilter(MagnoliaManagedFilter.java:92)
at info.magnolia.cms.filters.MgnlInterceptFilter.doFilter(MgnlInterceptFilter.java:132)
at info.magnolia.cms.filters.MagnoliaManagedFilter$CustomFilterChain.doFilter(MagnoliaManagedFilter.java:92)
at info.magnolia.cms.filters.MgnlContextFilter.doFilter(MgnlContextFilter.java:45)
at info.magnolia.cms.filters.MagnoliaManagedFilter$CustomFilterChain.doFilter(MagnoliaManagedFilter.java:92)
at info.magnolia.cms.security.SecurityFilter.doFilter(SecurityFilter.java:100)
at info.magnolia.cms.filters.MagnoliaManagedFilter$CustomFilterChain.doFilter(MagnoliaManagedFilter.java:92)
at info.magnolia.cms.filters.MultipartRequestFilter.doFilter(MultipartRequestFilter.java:80)
at info.magnolia.cms.filters.MagnoliaManagedFilter$CustomFilterChain.doFilter(MagnoliaManagedFilter.java:92)
at info.magnolia.cms.filters.MgnlVirtualUriFilter.doFilter(MgnlVirtualUriFilter.java:83)
at info.magnolia.cms.filters.MagnoliaManagedFilter$CustomFilterChain.doFilter(MagnoliaManagedFilter.java:92)
at info.magnolia.cms.filters.ContentTypeFilter.doFilter(ContentTypeFilter.java:66)
at info.magnolia.cms.filters.MagnoliaManagedFilter$CustomFilterChain.doFilter(MagnoliaManagedFilter.java:92)
at info.magnolia.cms.filters.MagnoliaManagedFilter.doFilter(MagnoliaManagedFilter.java:65)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
at java.lang.Thread.run(Thread.java:595)
Caused by: java.net.SocketException: Broken pipe
at java.net.SocketOutputStream.socketWrite0(Native Method)
at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:92)
at java.net.SocketOutputStream.write(SocketOutputStream.java:136)
at org.apache.coyote.http11.InternalOutputBuffer.realWriteBytes(InternalOutputBuffer.java:746)
at org.apache.tomcat.util.buf.ByteChunk.flushBuffer(ByteChunk.java:433)
at org.apache.coyote.http11.InternalOutputBuffer.flush(InternalOutputBuffer.java:304)
at org.apache.coyote.http11.Http11Processor.action(Http11Processor.java:991)
at org.apache.coyote.Response.action(Response.java:182)
at org.apache.catalina.connector.OutputBuffer.doFlush(OutputBuffer.java:322)
... 39 more