TomEE version would be helpful for us.
Anyway no changes on that area as far as I recall.
It means, that you are trying to stress the server with more than the
available instances in the pool.
FYI, here is the default configuration of the stateless container. You can
override it depending on your application and the number of simultaneous
virtual users.
<!--
# ==========================================================
# Default Stateless SessionBean Container
# ==========================================================
-->
<ServiceProvider
id="Default Stateless Container"
service="Container"
types="STATELESS"
factory-name="create"
class-name="org.apache.openejb.core.stateless.StatelessContainerFactory">
# Specifies the time an invokation should wait for an instance
# of the pool to become available.
#
# After the timeout is reached, if an instance in the pool cannot
# be obtained, the method invocation will fail.
#
# Usable time units: nanoseconds, microsecons, milliseconds,
# seconds, minutes, hours, days. Or any combination such as
# "1 hour and 27 minutes and 10 seconds"
#
# Any usage of the `javax.ejb.AccessTimeout` annotation will
# override this setting for the bean or method where the
# annotation is used.
AccessTimeout = 30 seconds
# Specifies the size of the bean pools for this stateless
# SessionBean container. If StrictPooling is not used, instances
# will still be created beyond this number if there is demand, but
# they will not be returned to the pool and instead will be
# immediately destroyed.
MaxSize = 10
# Specifies the minimum number of bean instances that should be in
# the pool for each bean. Pools are prefilled to the minimum on
# startup. Note this will create start order dependencies between
# other beans that also eagerly start, such as other `@Stateless`
# beans with a minimum or `@Singleton` beans using `@Startup`. The
# @DependsOn annotation can be used to appropriately influence
# start order.
#
# The minimum pool size is rigidly maintained. Instances in the
# minimum side of the pool are not eligible for `IdleTimeout` or
# `GarbageCollection`, but are subject to `MaxAge` and flushing.
#
# If the pool is flushed it is immediately refilled to the minimum
# size with `MaxAgeOffset` applied. If an instance from the minimum
# side of the pool reaches its `MaxAge`, it is also immediately
# replaced. Replacement is done in a background queue using the
# number of threads specified by `CallbackThreads`.
MinSize = 0
# StrictPooling tells the container what to do when the pool
# reaches it's maximum size and there are incoming requests that
# need instances.
#
# With strict pooling, requests will have to wait for instances to
# become available. The pool size will never grow beyond the the
# set `MaxSize` value. The maximum amount of time a request should
# wait is specified via the `AccessTimeout` setting.
#
# Without strict pooling, the container will create temporary
# instances to meet demand. The instances will last for just one
# method invocation and then are removed.
#
# Setting `StrictPooling` to `false` and `MaxSize` to `0` will result in
# no pooling. Instead instances will be created on demand and live
# for exactly one method call before being removed.
StrictPooling = true
# Specifies the maximum time that an instance should live before
# it should be retired and removed from use. This will happen
# gracefully. Useful for situations where bean instances are
# designed to hold potentially expensive resources such as memory
# or file handles and need to be periodically cleared out.
#
# Usable time units: nanoseconds, microsecons, milliseconds,
# seconds, minutes, hours, days. Or any combination such as
# `1 hour and 27 minutes and 10 seconds`
MaxAge = 0 hours
# When `ReplaceAged` is enabled, any instances in the pool that
# expire due to reaching their `MaxAge` will be replaced immediately
# so that the pool will remain at its current size. Replacement
# is done in a background queue so that incoming threads will not
# have to wait for instance creation.
#
# The aim of his option is to prevent user requests from paying
# the instance creation cost as `MaxAge` is enforced, potentially
# while under heavy load at peak hours.
#
# Instances from the minimum side of the pool are always replaced
# when they reach their `MaxAge`, this setting dictates the
# treatment of non-minimum instances.
ReplaceAged = true
# When `ReplaceFlushed` is enabled, any instances in the pool that
# are flushed will be replaced immediately so that the pool will
# remain at its current size. Replacement is done in a background
# queue so that incoming threads will not have to wait for
# instance creation.
#
# The aim of his option is to prevent user requests from paying
# the instance creation cost if a flush performed while under
# heavy load at peak hours.
#
# Instances from the minimum side of the pool are always replaced
# when they are flushed, this setting dictates the treatment of
# non-minimum instances.
#
# A bean may flush its pool by casting the `SessionContext` to
# `Flushable` and calling `flush()`. See `SweepInterval` for details on
# how flush is performed.
#
# import javax.annotation.Resource;
# import javax.ejb.SessionContext;
# import javax.ejb.Stateless;
# import java.io.Flushable;
# import java.io.IOException;
#
# @Stateless
# public class MyBean {
#
# @Resource
# private SessionContext sessionContext;
#
# public void flush() throws IOException {
#
# ((Flushable) sessionContext).flush();
# }
# }
ReplaceFlushed = false
# Applies to MaxAge usage and would rarely be changed, but is a
# nice feature to understand.
#
# When the container first starts and the pool is filled to the
# minimum size, all those "minimum" instances will have the same
# creation time and therefore all expire at the same time dictated
# by the `MaxAge` setting. To protect against this sudden drop
# scenario and provide a more gradual expiration from the start
# the container will spread out the age of the instances that fill
# the pool to the minimum using an offset.
#
# The `MaxAgeOffset` is not the final value of the offset, but
# rather it is used in creating the offset and allows the
# spreading to push the initial ages into the future or into the
# past. The pool is filled at startup as follows:
#
# for (int i = 0; i < poolMin; i++) {
# long ageOffset = (maxAge / poolMin * i * maxAgeOffset) % maxAge;
# pool.add(new Bean(), ageOffset));
# }
#
# The default `MaxAgeOffset` is -1 which causes the initial
# instances in the pool to live a bit longer before expiring. As
# a concrete example, let's say the MinSize is 4 and the MaxAge is
# 100 years. The generated offsets for the four instances created
# at startup would be 0, -25, -50, -75. So the first instance
# would be "born" at age 0, die at 100, living 100 years. The
# second instance would be born at -25, die at 100, living a total
# of 125 years. The third would live 150 years. The fourth 175
# years.
#
# A `MaxAgeOffset` of 1 would cause instances to be "born" older
# and therefore die sooner. Using the same example `MinSize` of 4
# and `MaxAge` of `100 years`, the life spans of these initial four
# instances would be 100, 75, 50, and 25 years respectively.
#
# A `MaxAgeOffset` of 0 will cause no "spreading" of the age of the
# first instances used to fill the pool to the minimum and these
# instances will of course reach their MaxAge at the same time.
# It is possible to set to decimal values such as -0.5, 0.5, -1.2,
# or 1.2.
MaxAgeOffset = -1
# Specifies the maximum time that an instance should be allowed to
# sit idly in the pool without use before it should be retired and
# removed.
#
# Usable time units: nanoseconds, microsecons, milliseconds,
# seconds, minutes, hours, days. Or any combination such as
# "1 hour and 27 minutes and 10 seconds"
IdleTimeout = 0 minutes
# Allows Garbage Collection to be used as a mechanism for shrinking
# the pool. When set to true all instances in the pool, excluding
# the minimum, are eligible for garbage collection by the virtual
# machine as per the rules of `java.lang.ref.SoftReference` and can be
# claimed by the JVM to free memory. Instances garbage collected
# will have their `@PreDestroy` methods called during finalization.
#
# In the OpenJDK VM the `-XX:SoftRefLRUPolicyMSPerMB` flag can adjust
# how aggressively SoftReferences are collected. The default
# OpenJDK setting is 1000, resulting in inactive pooled instances
# living one second of lifetime per free megabyte in the heap, which
# is very aggressive. The setting should be increased to get the
# most out of the `GarbageCollection` feature of the pool. Much
# higher settings are safe. Even a setting as high as 3600000 (1
# hour per free MB in the heap) does not affect the ability for the
# VM to garbage collect SoftReferences in the event that memory is
# needed to avoid an `OutOfMemoryException`.
GarbageCollection = false
# The frequency in which the container will sweep the pool and
# evict expired instances. Eviction is how the `IdleTimeout`,
# `MaxAge`, and pool "flush" functionality is enforced. Higher
# intervals are better.
#
# Instances in use are excluded from sweeping. Should an instance
# expire while in use it will be evicted immediately upon return
# to the pool. Effectively `MaxAge` and flushes will be enforced as
# a part of normal activity or sweeping, while IdleTimeout is only
# enforcable via sweeping. This makes aggressive sweeping less
# important for a pool under moderate load.
#
# Usable time units: nanoseconds, microsecons, milliseconds,
# seconds, minutes, hours, days. Or any combination such as
# `1 hour and 27 minutes and 10 seconds`
SweepInterval = 5 minutes
# When sweeping the pool for expired instances a thread pool is
# used to process calling `@PreDestroy` on expired instances as well
# as creating new instances as might be required to fill the pool
# to the minimum after a Flush or `MaxAge` expiration. The
# `CallbackThreads` setting dictates the size of the thread pool and
# is shared by all beans deployed in the container.
CallbackThreads = 5
# PostConstruct methods are invoked on all instances in the pool
# when the bean is undeployed and its pool is closed. The
# `CloseTimeout` specifies the maximum time to wait for the pool to
# close and `PostConstruct` methods to be invoked.
#
# Usable time units: nanoseconds, microsecons, milliseconds,
# seconds, minutes, hours, days. Or any combination such as
# `1 hour and 27 minutes and 10 seconds`
CloseTimeout = 5 minutes
</ServiceProvider>
JLouis
2013/3/6 José Luis Cetina <[email protected]>
> Hi im gettin *ConcurrentAccessTimeoutException: No instances available in
> Stateless Session Bean pool. Waited 30 SECONDS....*
>
> Here is the complete log: http://pastebin.ca/2328770
>
> Any advice, what could be? Do i have to configure something in tomee.xml??
>
> Part of the log:
>
>
> *Mar 05, 2013 9:38:20 PM org.apache.openejb.cdi.CdiAppContextsService
> lazyStartSessionContext
> WARNING: Could NOT lazily initialize session context because of null
> RequestContext
> javax.ejb.ConcurrentAccessTimeoutException: No instances available in
> Stateless Session Bean pool. Waited 30 SECONDS
> at
>
> org.apache.openejb.core.stateless.StatelessInstanceManager.getInstance(StatelessInstanceManager.java:190)
> at
>
> org.apache.openejb.core.stateless.StatelessContainer.invoke(StatelessContainer.java:186)
> at
>
> org.apache.openejb.core.ivm.EjbObjectProxyHandler.synchronizedBusinessMethod(EjbObjectProxyHandler.java:256)
> at
>
> org.apache.openejb.core.ivm.EjbObjectProxyHandler.businessMethod(EjbObjectProxyHandler.java:251)
> at
>
> org.apache.openejb.core.ivm.EjbObjectProxyHandler._invoke(EjbObjectProxyHandler.java:85)
> at
>
> org.apache.openejb.core.ivm.BaseEjbProxyHandler.invoke(BaseEjbProxyHandler.java:279)
> at sun.proxy.$Proxy245.getExamenAplicado(Unknown Source)
> at
>
> com.grupokx.preparatorianos.controller.examendiagnostico.ExamenDiagnosticoMBean.mypostconstruct(ExamenDiagnosticoMBean.java:63)
> at sun.reflect.GeneratedMethodAccessor800.invoke(Unknown Source)
> at
>
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:601)
> at
>
> org.apache.tomee.catalina.JavaeeInstanceManager.postConstruct(JavaeeInstanceManager.java:132)
> at
>
> org.apache.tomee.catalina.JavaeeInstanceManager.newInstance(JavaeeInstanceManager.java:69)
> at
>
> org.apache.myfaces.config.annotation.Tomcat7AnnotationLifecycleProvider.postConstruct(Tomcat7AnnotationLifecycleProvider.java:94)
> at
>
> org.apache.myfaces.config.ManagedBeanBuilder.buildManagedBean(ManagedBeanBuilder.java:213)
> at
>
> org.apache.myfaces.el.unified.resolver.ManagedBeanResolver.createManagedBean(ManagedBeanResolver.java:333)
> at
>
> org.apache.myfaces.el.unified.resolver.ManagedBeanResolver.getValue(ManagedBeanResolver.java:296)
> at javax.el.CompositeELResolver.getValue(CompositeELResolver.java:58)
> at
>
> org.apache.myfaces.el.unified.resolver.FacesCompositeELResolver.getValue(FacesCompositeELResolver.java:179)
> at org.apache.el.parser.AstIdentifier.getValue(AstIdentifier.java:72)
> at org.apache.el.parser.AstValue.getValue(AstValue.java:161)
> at org.apache.el.parser.AstEqual.getValue(AstEqual.java:38)
> at org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:185)
> at
>
> org.apache.webbeans.el.WrappedValueExpression.getValue(WrappedValueExpression.java:68)
> at
>
> org.apache.myfaces.view.facelets.el.ContextAwareTagValueExpression.getValue(ContextAwareTagValueExpression.java:96)
> at javax.faces.component._DeltaStateHelper.eval(_DeltaStateHelper.java:266)
> at
> javax.faces.component.UIComponentBase.isRendered(UIComponentBase.java:1187)
> at
> javax.faces.component.UIComponentBase.encodeAll(UIComponentBase.java:494)
> at
> javax.faces.component.UIComponentBase.encodeAll(UIComponentBase.java:541)
> at
> javax.faces.component.UIComponentBase.encodeAll(UIComponentBase.java:541)
> at
> javax.faces.component.UIComponentBase.encodeAll(UIComponentBase.java:541)
> at
>
> org.apache.myfaces.view.facelets.FaceletViewDeclarationLanguage.renderView(FaceletViewDeclarationLanguage.java:1981)
> at
>
> org.apache.myfaces.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:285)
> at
>
> javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:59)
> at
>
> org.apache.myfaces.lifecycle.RenderResponseExecutor.execute(RenderResponseExecutor.java:116)
> at
> org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:241)
> at javax.faces.webapp.FacesServlet.service(FacesServlet.java:199)
> at
>
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
> at
>
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
> at
>
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
> at
>
> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
> at org.apache.tomee.catalina.OpenEJBValve.invoke(OpenEJBValve.java:45)
> at
>
> org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
> at
>
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
> at
>
> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
> at
> org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936)
> at
>
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
> at
> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
> at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:200)
> at
>
> org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
> at
>
> org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
> at
>
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> at
>
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> at java.lang.Thread.run(Thread.java:722)
> *
>
--
Jean-Louis
