我得到这个错误，但它是奇怪的。我做了一个java web应用程序，当我提出任何类型的请求时，我得到这个OutOfMemory，但请记住，我有这个工作了一个星期，直到现在它才给我错误。(我从一个类的所有对象中做了一个简单的get).这就是整个日志。
java.lang.OutOfMemoryError: Java heap space
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Exception in thread "Keep-Alive-Timer" |#]
In main loop, we have serious trouble: java.lang.OutOfMemoryError: Java heap space|#]
[192.168.100.14]:4900 [development] [3.12] Java heap space
java.lang.OutOfMemoryError: Java heap space
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[192.168.100.14]:4900 [development] [3.12] Failed to execute java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask@4bcd0b7e[Completed exceptionally: java.lang.OutOfMemoryError: Java heap space]
java.lang.OutOfMemoryError: Java heap space
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java.lang.OutOfMemoryError: Java heap space
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Exception in thread "http-listener-2-expirer(1)" |#]
Exception in thread "admin-listener-expirer(1)" |#]
The following warnings have been detected: WARNING: Unknown HK2 failure detected:
MultiException stack 1 of 1
javax.enterprise.inject.CreationException
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490)
at java.base/java.lang.Class.newInstance(Class.java:584)
at org.jboss.weld.security.NewInstanceAction.run(NewInstanceAction.java:33)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at org.jboss.weld.injection.Exceptions.rethrowException(Exceptions.java:40)
at org.jboss.weld.injection.Exceptions.rethrowException(Exceptions.java:50)
at org.jboss.weld.injection.Exceptions.rethrowException(Exceptions.java:90)
at org.jboss.weld.injection.ConstructorInjectionPoint.newInstance(ConstructorInjectionPoint.java:127)
at org.jboss.weld.injection.ConstructorInjectionPoint.invokeAroundConstructCallbacks(ConstructorInjectionPoint.java:92)
at org.jboss.weld.injection.ConstructorInjectionPoint.newInstance(ConstructorInjectionPoint.java:78)
at org.jboss.weld.injection.producer.AbstractInstantiator.newInstance(AbstractInstantiator.java:28)
at org.jboss.weld.injection.producer.BasicInjectionTarget.produce(BasicInjectionTarget.java:112)
at org.jboss.weld.injection.producer.BeanInjectionTarget.produce(BeanInjectionTarget.java:186)
at org.glassfish.jersey.ext.cdi1x.internal.CdiComponentProvider$InjectionManagerInjectedCdiTarget.produce(CdiComponentProvider.java:890)
at org.jboss.weld.bean.ManagedBean.create(ManagedBean.java:160)
at org.jboss.weld.contexts.unbound.DependentContextImpl.get(DependentContextImpl.java:70)
at org.jboss.weld.bean.ContextualInstanceStrategy$DefaultContextualInstanceStrategy.get(ContextualInstanceStrategy.java:100)
at org.jboss.weld.bean.ContextualInstance.get(ContextualInstance.java:50)
at org.jboss.weld.manager.BeanManagerImpl.getReference(BeanManagerImpl.java:694)
at org.jboss.weld.manager.BeanManagerImpl.getReference(BeanManagerImpl.java:717)
at org.glassfish.jersey.ext.cdi1x.internal.CdiUtil.getBeanReference(CdiUtil.java:127)
at org.glassfish.jersey.ext.cdi1x.internal.AbstractCdiBeanSupplier$1.getInstance(AbstractCdiBeanSupplier.java:69)
at org.glassfish.jersey.ext.cdi1x.internal.AbstractCdiBeanSupplier._provide(AbstractCdiBeanSupplier.java:103)
at org.glassfish.jersey.ext.cdi1x.internal.RequestScopedCdiBeanSupplier.get(RequestScopedCdiBeanSupplier.java:46)
at org.glassfish.jersey.inject.hk2.InstanceSupplierFactoryBridge.provide(InstanceSupplierFactoryBridge.java:53)
at org.jvnet.hk2.internal.FactoryCreator.create(FactoryCreator.java:129)
at org.jvnet.hk2.internal.SystemDescriptor.create(SystemDescriptor.java:463)
at org.jvnet.hk2.internal.PerLookupContext.findOrCreate(PerLookupContext.java:46)
at org.jvnet.hk2.internal.Utilities.createService(Utilities.java:2102)
at org.jvnet.hk2.internal.ServiceLocatorImpl.internalGetService(ServiceLocatorImpl.java:758)
at org.jvnet.hk2.internal.ServiceLocatorImpl.internalGetService(ServiceLocatorImpl.java:721)
at org.jvnet.hk2.internal.ServiceLocatorImpl.getService(ServiceLocatorImpl.java:691)
at org.glassfish.jersey.inject.hk2.AbstractHk2InjectionManager.getInstance(AbstractHk2InjectionManager.java:160)
at org.glassfish.jersey.inject.hk2.ImmediateHk2InjectionManager.getInstance(ImmediateHk2InjectionManager.java:30)
at org.glassfish.jersey.internal.inject.Injections.getOrCreate(Injections.java:105)
at org.glassfish.jersey.server.model.MethodHandler$ClassBasedMethodHandler.getInstance(MethodHandler.java:260)
at org.glassfish.jersey.server.internal.routing.PushMethodHandlerRouter.apply(PushMethodHandlerRouter.java:51)
at org.glassfish.jersey.server.internal.routing.RoutingStage._apply(RoutingStage.java:86)
at org.glassfish.jersey.server.internal.routing.RoutingStage._apply(RoutingStage.java:89)
at org.glassfish.jersey.server.internal.routing.RoutingStage._apply(RoutingStage.java:89)
at org.glassfish.jersey.server.internal.routing.RoutingStage._apply(RoutingStage.java:89)
at org.glassfish.jersey.server.internal.routing.RoutingStage._apply(RoutingStage.java:89)
at org.glassfish.jersey.server.internal.routing.RoutingStage.apply(RoutingStage.java:69)
at org.glassfish.jersey.server.internal.routing.RoutingStage.apply(RoutingStage.java:38)
at org.glassfish.jersey.process.internal.Stages.process(Stages.java:173)
at org.glassfish.jersey.server.ServerRuntime$1.run(ServerRuntime.java:245)
at org.glassfish.jersey.internal.Errors$1.call(Errors.java:248)
at org.glassfish.jersey.internal.Errors$1.call(Errors.java:244)
at org.glassfish.jersey.internal.Errors.process(Errors.java:292)
at org.glassfish.jersey.internal.Errors.process(Errors.java:274)
at org.glassfish.jersey.internal.Errors.process(Errors.java:244)
at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:265)
at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:232)
at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:680)
at org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:392)
at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:346)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:365)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:318)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:205)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1628)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:258)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:160)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:755)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:575)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:99)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:159)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:371)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:238)
at com.sun.enterprise.v3.services.impl.ContainerMapper$HttpHandlerCallable.call(ContainerMapper.java:520)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:217)
at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:182)
at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:156)
at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:218)
at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:95)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:260)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:177)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:109)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:88)
at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:53)
at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:524)
at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:89)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:94)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:33)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:114)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:569)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:549)
at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: java.lang.OutOfMemoryError: Java heap space
at org.eclipse.persistence.internal.identitymaps.HardCacheWeakIdentityMap.createCacheKey(HardCacheWeakIdentityMap.java:50)
at org.eclipse.persistence.internal.identitymaps.AbstractIdentityMap.acquireLock(AbstractIdentityMap.java:98)
at org.eclipse.persistence.internal.identitymaps.IdentityMapManager.acquireLock(IdentityMapManager.java:184)
at org.eclipse.persistence.internal.sessions.IdentityMapAccessor.acquireLock(IdentityMapAccessor.java:101)
at org.eclipse.persistence.internal.sessions.IdentityMapAccessor.acquireLock(IdentityMapAccessor.java:92)
at org.eclipse.persistence.internal.sessions.AbstractSession.retrieveCacheKey(AbstractSession.java:5361)
at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObject(ObjectBuilder.java:975)
at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildWorkingCopyCloneNormally(ObjectBuilder.java:909)
at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObjectInUnitOfWork(ObjectBuilder.java:862)
at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObject(ObjectBuilder.java:745)
at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObject(ObjectBuilder.java:699)
at org.eclipse.persistence.queries.ObjectLevelReadQuery.buildObject(ObjectLevelReadQuery.java:853)
at org.eclipse.persistence.queries.ReadAllQuery.registerResultInUnitOfWork(ReadAllQuery.java:987)
at org.eclipse.persistence.queries.ReadAllQuery.executeObjectLevelReadQuery(ReadAllQuery.java:598)
at org.eclipse.persistence.queries.ObjectLevelReadQuery.executeDatabaseQuery(ObjectLevelReadQuery.java:1224)
at org.eclipse.persistence.queries.DatabaseQuery.execute(DatabaseQuery.java:914)
at org.eclipse.persistence.queries.ObjectLevelReadQuery.execute(ObjectLevelReadQuery.java:1183)
at org.eclipse.persistence.queries.ReadAllQuery.execute(ReadAllQuery.java:485)
at org.eclipse.persistence.queries.ObjectLevelReadQuery.executeInUnitOfWork(ObjectLevelReadQuery.java:1271)
at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.internalExecuteQuery(UnitOfWorkImpl.java:2981)
at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1895)
at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1877)
at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1842)
at org.eclipse.persistence.internal.jpa.QueryImpl.executeReadQuery(QueryImpl.java:262)
at org.eclipse.persistence.internal.jpa.QueryImpl.getResultList(QueryImpl.java:482)
at persistence.Util.getPalabras(Util.java:34)
at support.SingletonHashtableOA.<init>(SingletonHashtableOA.java:15)
at support.SingletonHashtableOA.getInstance(SingletonHashtableOA.java:29)
at api.DocumentosEndpoint.<init>(DocumentosEndpoint.java:65)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
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StandardWrapperValve[api.RestApplication]: Servlet.service() for servlet api.RestApplication threw exception
java.lang.OutOfMemoryError: Java heap space
at org.eclipse.persistence.internal.identitymaps.HardCacheWeakIdentityMap.createCacheKey(HardCacheWeakIdentityMap.java:50)
at org.eclipse.persistence.internal.identitymaps.AbstractIdentityMap.acquireLock(AbstractIdentityMap.java:98)
at org.eclipse.persistence.internal.identitymaps.IdentityMapManager.acquireLock(IdentityMapManager.java:184)
at org.eclipse.persistence.internal.sessions.IdentityMapAccessor.acquireLock(IdentityMapAccessor.java:101)
at org.eclipse.persistence.internal.sessions.IdentityMapAccessor.acquireLock(IdentityMapAccessor.java:92)
at org.eclipse.persistence.internal.sessions.AbstractSession.retrieveCacheKey(AbstractSession.java:5361)
at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObject(ObjectBuilder.java:975)
at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildWorkingCopyCloneNormally(ObjectBuilder.java:909)
at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObjectInUnitOfWork(ObjectBuilder.java:862)
at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObject(ObjectBuilder.java:745)
at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObject(ObjectBuilder.java:699)
at org.eclipse.persistence.queries.ObjectLevelReadQuery.buildObject(ObjectLevelReadQuery.java:853)
at org.eclipse.persistence.queries.ReadAllQuery.registerResultInUnitOfWork(ReadAllQuery.java:987)
at org.eclipse.persistence.queries.ReadAllQuery.executeObjectLevelReadQuery(ReadAllQuery.java:598)
at org.eclipse.persistence.queries.ObjectLevelReadQuery.executeDatabaseQuery(ObjectLevelReadQuery.java:1224)
at org.eclipse.persistence.queries.DatabaseQuery.execute(DatabaseQuery.java:914)
at org.eclipse.persistence.queries.ObjectLevelReadQuery.execute(ObjectLevelReadQuery.java:1183)
at org.eclipse.persistence.queries.ReadAllQuery.execute(ReadAllQuery.java:485)
at org.eclipse.persistence.queries.ObjectLevelReadQuery.executeInUnitOfWork(ObjectLevelReadQuery.java:1271)
at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.internalExecuteQuery(UnitOfWorkImpl.java:2981)
at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1895)
at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1877)
at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1842)
at org.eclipse.persistence.internal.jpa.QueryImpl.executeReadQuery(QueryImpl.java:262)
at org.eclipse.persistence.internal.jpa.QueryImpl.getResultList(QueryImpl.java:482)
at persistence.Util.getPalabras(Util.java:34)
at support.SingletonHashtableOA.<init>(SingletonHashtableOA.java:15)
at support.SingletonHashtableOA.getInstance(SingletonHashtableOA.java:29)
at api.DocumentosEndpoint.<init>(DocumentosEndpoint.java:65)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
|#]
java.lang.OutOfMemoryError: Java heap space
我坚持认为，这很奇怪，因为我从来没有出现过这个问题，直到现在，我也没有修改任何一行代码。 谢谢。
作为 Cristoph John 建议，这是服务器端的限制。Payara的默认容量是512MB，我的单子已经装满了，我只需要去管理控制台改一下就可以了。