BLOCKED thread at MasterServlet.process method under load

Hi experts, We face an issue on backend node that seen like below. That causes CPU overload and even requires to restart to normalize. How can we handle this problem? v5.2.6

 "hybrisHTTP17348" prio=5 tid=0x48845 nid=0xbecd BLOCKED     owned by hybrisHTTP17321 Id=48795 - stats: cpu=4662 blk=-1 wait=-1
  java.lang.Thread.State: BLOCKED
     at de.hybris.platform.hmc.webchips.MasterServlet.process(MasterServlet.java:229)
     - waiting to lock de.hybris.platform.commerceservices.jalo.CommerceJaloSession@727a0b4d
     at de.hybris.platform.hmc.webchips.MasterServlet.doGet(MasterServlet.java:90)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:620)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
     at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
     at de.hybris.platform.servicelayer.web.AbstractPlatformFilterChain$InternalFilterChain.doFilter(AbstractPlatformFilterChain.java:256)
     at de.hybris.platform.servicelayer.web.AbstractPlatformFilterChain$StatisticsGatewayFilter.doFilter(AbstractPlatformFilterChain.java:345)
     at de.hybris.platform.servicelayer.web.AbstractPlatformFilterChain$InternalFilterChain.doFilter(AbstractPlatformFilterChain.java:226)
     at de.hybris.platform.servicelayer.web.SecureMediaFilter.doFilter(SecureMediaFilter.java:97)
     at de.hybris.platform.servicelayer.web.AbstractPlatformFilterChain$InternalFilterChain.doFilter(AbstractPlatformFilterChain.java:226)
     at de.hybris.platform.servicelayer.web.DynamicCatalogVersionActivationFilter.doFilter(DynamicCatalogVersionActivationFilter.java:93)
     at de.hybris.platform.servicelayer.web.AbstractPlatformFilterChain$InternalFilterChain.doFilter(AbstractPlatformFilterChain.java:226)
     at de.hybris.platform.servicelayer.web.DataSourceSwitchingFilter.doFilter(DataSourceSwitchingFilter.java:73)
     at de.hybris.platform.servicelayer.web.AbstractPlatformFilterChain$InternalFilterChain.doFilter(AbstractPlatformFilterChain.java:226)
     at de.hybris.platform.servicelayer.web.SessionFilter.doFilter(SessionFilter.java:73)
     at de.hybris.platform.servicelayer.web.AbstractPlatformFilterChain$InternalFilterChain.doFilter(AbstractPlatformFilterChain.java:226)
     at de.hybris.platform.servicelayer.web.RedirectWhenSystemIsNotInitializedFilter.doFilter(RedirectWhenSystemIsNotInitializedFilter.java:104)
     at de.hybris.platform.servicelayer.web.AbstractPlatformFilterChain$InternalFilterChain.doFilter(AbstractPlatformFilterChain.java:226)
     at de.hybris.platform.servicelayer.web.DynamicTenantSwitchingFilter.doFilterInternal(DynamicTenantSwitchingFilter.java:88)
     at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
     at de.hybris.platform.servicelayer.web.AbstractPlatformFilterChain$InternalFilterChain.doFilter(AbstractPlatformFilterChain.java:226)
     at de.hybris.platform.servicelayer.web.Log4JFilter.doFilter(Log4JFilter.java:47)
     at de.hybris.platform.servicelayer.web.AbstractPlatformFilterChain$InternalFilterChain.doFilter(AbstractPlatformFilterChain.java:226)
     at de.hybris.platform.servicelayer.web.AbstractPlatformFilterChain.doFilterInternal(AbstractPlatformFilterChain.java:156)
     at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
     at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:343)
     at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:260)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
     at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
     at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
     at de.hybris.platform.servicelayer.web.XSSFilter.doFilter(XSSFilter.java:230)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
     at org.apache.catalina.valves.RemoteIpValve.invoke(RemoteIpValve.java:683)
     at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
     at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1070)
     at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611)
     at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)
      - locked org.apache.tomcat.util.net.SocketWrapper@7fe09971
     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
     at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
     at java.lang.Thread.run(Thread.java:745)
     Locked synchronizers: count = 1
      - java.util.concurrent.ThreadPoolExecutor$Worker@6b57c322