在最近两三天内，在我们的tomcat服务上部署的网站发现了线程死锁问题。在对JVM线程转储进行故障排除和分析之后，我们在工作线程中发现了一个大的线程块，而该问题可能是由ehcache引起的。 但是，我相信ehcache的使用是正确的，有人可以帮助我分析原因吗？
我们的程序，日志和其他信息的代码和配置如下，谢谢：
版本：ehcache 2.10.3 ehcache-core 2.6.11 shiro-ehcache 1.2.4
src代码：
@Service
public class UserBuslinesService {
@Resource
UserBuslinesDao userbuslinesDao;
public List<UserBuslines> find(Map paraMap) {
return userbuslinesDao.find(paraMap);
}
@Cacheable(value={"UserBuslines"}, key = "#map")
public List<UserBuslines> select(Map map) {
List<UserBuslines> oList = userbuslinesDao.select(map);
return oList;
}
public List<UserBuslines> selectAll(Map map) {
List<UserBuslines> oList = userbuslinesDao.selectAll(map);
return oList;
}
public UserBuslines get(Serializable id) {
return userbuslinesDao.get(id);
}
@CacheEvict(value={"UserBuslines", "CarInfoTree"}, allEntries=true)
public void insert(UserBuslines entity) {
userbuslinesDao.insert(entity);
}
@CacheEvict(value={"UserBuslines", "CarInfoTree"}, allEntries=true)
public void update(UserBuslines entity) {
userbuslinesDao.update(entity);
}
@CacheEvict(value={"UserBuslines", "CarInfoTree"}, allEntries=true)
public void deleteById(Serializable id) {
userbuslinesDao.deleteById(id);
}
@CacheEvict(value={"UserBuslines", "CarInfoTree"}, allEntries=true)
public void deleteByIds(Map paraMap) {
userbuslinesDao.deleteByIds(paraMap);
}
@CacheEvict(value={"UserBuslines", "CarInfoTree"}, allEntries=true)
public void delete(Serializable[] ids) {
userbuslinesDao.delete(ids);
}
}
-----------------------------------------------------------------------------------
@ResponseBody
@RequestMapping(value = "/SelectLastestGpsData", method = RequestMethod.POST)
public Map<String, Object> SelectLastestGpsData(Integer[] firstCorp, Integer[] corpIdList, Integer[] buslineIdList, String[] simNoList, HttpSession session) {
List<LastestGpsData> lastestGpsDataList;
List<CarInfoTree> carInfoTreeList = new ArrayList<>();
Map<String, Object> key = new HashMap<String, Object>() {
{
put("platforms", Arrays.asList(platform.replaceAll(" ", "").split(",")));
}
};
Object cacheByCarTree = EhcacheUtil.getInstance().get("CarInfoTree", key);
if (cacheByCarTree != null) {
carInfoTreeList = (List<CarInfoTree>) cacheByCarTree;
}
Map<String, Object> queryUserBuslinesMap = new HashMap<>();
queryUserBuslinesMap.put("userId", session.getAttribute("UserId"));
List<UserBuslines> userBuslinesList = userBuslinesService.select(queryUserBuslinesMap);
List<CarInfoTree> targetCarInfoList = carInfoTreeList
.stream()
.filter(
e -> (firstCorp != null && Arrays.asList(firstCorp).contains(e.getParentId())) ||
(corpIdList != null && Arrays.asList(corpIdList).contains(e.getCorpId())) ||
(buslineIdList != null && Arrays.asList(buslineIdList).contains(e.getBuslineId())) ||
(simNoList != null && Arrays.asList(simNoList).contains(e.getSimNo()))
).filter(car -> userBuslinesList.stream().anyMatch(ub -> ub.getBuslineId() == car.getBuslineId()))
.collect(Collectors.toList());
lastestGpsDataList = selectLastestGpsData(targetCarInfoList);
Map<String, Object> result = new HashMap<>();
result.put("rows", lastestGpsDataList);
if(lastestGpsDataList.size()>0){
//EhcacheUtil.getInstance().put("gnssData", session.getAttribute("UserId"), lastestGpsDataList);
storageHashMap.put(session.getAttribute("UserId"), lastestGpsDataList);
}
return result;
}
-------------------------------------------------------
public class EhcacheUtil {
private static final String path = "/ehcache-config.xml";
private URL url;
private CacheManager manager;
private static EhcacheUtil ehCache;
private EhcacheUtil(String path) {
url = getClass().getResource(path);
manager = CacheManager.create(url);
}
public static EhcacheUtil getInstance() {
if (ehCache== null) {
ehCache= new EhcacheUtil(path);
}
return ehCache;
}
public void put(String cacheName, Object key, Object value) {
Cache cache = manager.getCache(cacheName);
Element element = new Element(key, value);
cache.put(element);
cache.flush();
}
public Object get(String cacheName, Object key) {
Cache cache = manager.getCache(cacheName);
Element element = cache.get(key);
return element == null ? null : element.getObjectValue();
}
public Cache get(String cacheName) {
return manager.getCache(cacheName);
}
public void remove(String cacheName, String key) {
Cache cache = manager.getCache(cacheName);
cache.remove(key);
}
}
线程转储：
"http-nio-6600-exec-189" #25494 daemon prio=5 os_prio=0 tid=0x0000000020336000 nid=0x1f40 waiting for monitor entry [0x000000002eecd000]
java.lang.Thread.State: BLOCKED (on object monitor)
at net.sf.ehcache.store.cachingtier.OnHeapCachingTier$Fault.get(OnHeapCachingTier.java:331)
- waiting to lock <0x000000008b5e3bc8> (a net.sf.ehcache.store.cachingtier.OnHeapCachingTier$Fault)
at net.sf.ehcache.store.cachingtier.OnHeapCachingTier$Fault.access$200(OnHeapCachingTier.java:311)
at net.sf.ehcache.store.cachingtier.OnHeapCachingTier.getValue(OnHeapCachingTier.java:299)
at net.sf.ehcache.store.cachingtier.OnHeapCachingTier.get(OnHeapCachingTier.java:199)
at net.sf.ehcache.store.CacheStore.get(CacheStore.java:192)
at net.sf.ehcache.Cache.get(Cache.java:1751)
at org.springframework.cache.ehcache.EhCacheCache.get(EhCacheCache.java:65)
at org.springframework.cache.interceptor.AbstractCacheInvoker.doGet(AbstractCacheInvoker.java:68)
at org.springframework.cache.interceptor.CacheAspectSupport.findInCaches(CacheAspectSupport.java:469)
at org.springframework.cache.interceptor.CacheAspectSupport.findCachedItem(CacheAspectSupport.java:435)
at org.springframework.cache.interceptor.CacheAspectSupport.execute(CacheAspectSupport.java:336)
at org.springframework.cache.interceptor.CacheAspectSupport.execute(CacheAspectSupport.java:302)
at org.springframework.cache.interceptor.CacheInterceptor.invoke(CacheInterceptor.java:61)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:654)
at com.xmgnss.service.UserBuslinesService$$EnhancerBySpringCGLIB$$d0f3eb42.select(<generated>)
at com.xmgnss.controller.LastestGpsDataController.SelectLastestGpsData(LastestGpsDataController.java:294
at sun.reflect.GeneratedMethodAccessor380.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:222)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:814)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:737)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:959)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:230)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at com.xmgnss.filter.XssFilter.doFilter(XssFilter.java:28)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:61)
at org.apache.shiro.web.servlet.AdviceFilter.executeChain(AdviceFilter.java:108)
at org.apache.shiro.web.servlet.AdviceFilter.doFilterInternal(AdviceFilter.java:137)
at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125)
at org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:66)
at org.apache.shiro.web.servlet.AbstractShiroFilter.executeChain(AbstractShiroFilter.java:449)
at org.apache.shiro.web.servlet.AbstractShiroFilter$1.call(AbstractShiroFilter.java:365)
at org.apache.shiro.subject.support.SubjectCallable.doCall(SubjectCallable.java:90)
at org.apache.shiro.subject.support.SubjectCallable.call(SubjectCallable.java:83)
at org.apache.shiro.subject.support.DelegatingSubject.execute(DelegatingSubject.java:383)
at org.apache.shiro.web.servlet.AbstractShiroFilter.doFilterInternal(AbstractShiroFilter.java:362)
at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125)
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346)
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:262)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:121)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:624)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:349)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:783)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:798)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1434)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
- locked <0x000000008c40c870> (a org.apache.tomcat.util.net.NioEndpoint$NioSocketWrapper)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
Locked ownable synchronizers:
- <0x000000008b6443a0> (a java.util.concurrent.ThreadPoolExecutor$Worker)
- waiting to lock <0x000000008b5e3bc8> (a net.sf.ehcache.store.cachingtier.OnHeapCachingTier$Fault)
- waiting to lock <0x000000008b5e3bc8> (a net.sf.ehcache.store.cachingtier.OnHeapCachingTier$Fault)
- waiting to lock <0x000000008b5e3bc8> (a net.sf.ehcache.store.cachingtier.OnHeapCachingTier$Fault)
- waiting to lock <0x000000008b5e3bc8> (a net.sf.ehcache.store.cachingtier.OnHeapCachingTier$Fault)
- waiting to lock <0x000000008b5e3bc8> (a net.sf.ehcache.store.cachingtier.OnHeapCachingTier$Fault)
- waiting to lock <0x000000008b5e3bc8> (a net.sf.ehcache.store.cachingtier.OnHeapCachingTier$Fault)
- waiting to lock <0x000000008b5e3bc8> (a net.sf.ehcache.store.cachingtier.OnHeapCachingTier$Fault)
- locked <0x000000008b5e3bc8> (a net.sf.ehcache.store.cachingtier.OnHeapCachingTier$Fault)
- waiting to lock <0x000000008b5e3bc8> (a net.sf.ehcache.store.cachingtier.OnHeapCachingTier$Fault)
- waiting to lock <0x000000008b5e3bc8> (a net.sf.ehcache.store.cachingtier.OnHeapCachingTier$Fault)
Line 3187: java.lang.Thread.State: BLOCKED (on object monitor)
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<ehcache>
<diskStore path="D:/xiaoyuchuan/cache" />
<defaultCache
maxElementsInMemory="1000"
eternal="false"
timeToIdleSeconds="120"
timeToLiveSeconds="120"
overflowToDisk="false"/>
<cache name="CarInfoTree"
maxElementsOnDisk="0"
maxElementsInMemory="20000"
eternal="true"
overflowToDisk="true"
diskPersistent="true"/>
<cache name="UserBuslines"
maxElementsOnDisk="20000"
maxElementsInMemory="2000"
eternal="true"
overflowToDisk="true"
diskPersistent="true"/>
<cache name="gnssData"
maxElementsOnDisk="0"
maxElementsInMemory="2000"
eternal="true"
overflowToDisk="true"
diskPersistent="true"/>
</ehcache>
答案 0 :(得分：0)
我们解决了这个问题，Ehcache很正常，这是我们的业务代码错误。 我们同时使用EhcacheUtil和Spring Ehcache批注，当EhcacheUtil返回null时，我们将循环调用out方法，然后服务器上的负载会突然增加，从而导致问题的描述。
我们仅通过使用Spring Ehcache注释解决了这个问题。
